bluuebunny/crossref_metadata_2025 huggingface dataset:
Evaluation of Material Selection on the Initial Embodied Energy Value of Low-Middle Apartment in Indonesia
Authors: Hanifah Yulita , Dwika Reztrie Noveryna , Ramadhan Try , Larasati Dewi
Published: August 2019

Construction of low-middle class apartment in Indonesia’s big cities is increasing steadily as the government set The One Million Houses Program to overcome the problem of housing backlog. As the construction project increasing, the use of construction materials is also raising. These phenomena raise concern on the energy consumption and carbon emission in Indonesia as buildings are the biggest materials consumers and responsible for up to 40% energy consumption and 33% carbon emission in the world. Moreover, in Indonesia, buildings consume 1/3 of national resources in their construction process. Certainly, this housing program can be considered to have a large contribution to energy consumption and carbon emissions in Indonesia. Therefore, the material selection in low-middle apartments is very important to consider as a factor that can contribute to energy consumption. In order to prevent the increase of energy consumption in the construction of low-middle apartments, prevention efforts in the initial phase of construction can be carried out such as the selection of materials that have low embodied energy. This study aims to evaluate the value of initial embodied energy based on factors in the material selection that can affect embodied energy using the AI-O and WUPA approaches, which are materials and workers. This study uses quantitative methods to obtain embodied energy values on these factors. The method used is AI-O method. There are four case studies that obtained from low-middle class apartments in one of urban cities in Indonesia, which is Bandung.
Evaluating the impact of Ventilation strategy and Window Opening Area on Overheating Issues
Authors: Jimenez-Bescos C
Published: August 2019

Thermal mass has the benefit of regulating energy in buildings and generates potential savings in energy and CO2 emissions. The result of the effect of climate change will be more intense and longer periods of summer heat waves. Use of the building thermal mass can reduce overheating in summer and minimise the need for cooling energy, reducing energy consumption and CO2 emissions. Night ventilation is one of the key factors to maximise the benefits of thermal mass in buildings but due to issues in security and pollution, in many situations windows can only be effectively opened during occupied hours. Cross ventilation provides gains versus the use of single side ventilation but it is not always possible to have it. The main aim of this study was to evaluate the influence of window opening area and night ventilation on the thermal mass benefits to overheating by exposing the thermal mass. A second aim was to understand the further benefits that could be obtained by using cross ventilation in reducing overheating This study was based on dynamic thermal simulations to analyse the overheating performance of a test room with covered and exposed thermal mass. The testing room was simulated for a range of window openings from 5% to 40% area opening with single-sided and cross natural ventilation. Fifthteen building simulation models were performed using the Energyplus plugin in DesignBuilder to evaluate the effect on the thermal mass behaviour to mitigate overheating according to different window opening areas during occupied hours in two different natural ventilation conditions. The simulation results show that by exposing and making use of the room thermal mass, the number of hours above 28ºC can be reduced with the reduction being proportional to the window opening area. The CIBSE TM52 overheating assessment is only passed by using window opening areas above 20% with a cross ventilation strategy, but they could generate occupants discomfort.
A study on the effect of facility renewal in small and mid-sized office buildings oriented to net-zero energy buildings–Measuring the effect of setting a cool space in summer-
Authors: Kouroki S , Sumiyoshi D , Choi Y
Published: August 2019

Recently, in Japan, ZEB has received attention since the need for energy self-sufficiency in buildings has been strongly recognized from the viewpoint of energy security. However, in small and mid-sized buildings with huge stocks, efforts are still small due to factors such as uncertainty in design methods and costs. In this paper, we verify the effect of cool spaces installed in entrances as one of the installation facilities applicable to small and mid-sized stock buildings. A summer experiment on cool space was conducted. From the questionnaire, we confirmed the improvement of thermal sensation and thermal comfort after entering an office room using a cool space. Moreover, using the operation data of air conditioning, the influence on the power consumption by installing a cool space was analysed. As a result, there was no reduction in the energy consumption of the entire building. However, in the office with a high cool-space utilization rate, we confirmed that the air-conditioning power consumption of the whole day has been reduced by 7.3%. These results show that cool space has the effect of improving comfort, and if more workers use it, an energy saving effect for the whole building can be expected.
CFD study with consideration of the surrounding buildings using a through-wall unit air conditioning system
Authors: Kubo Hirotaka , Tsukami Shiro , Icinose Masayuki , Kato Takaya
Published: August 2019

In order to select the operation patterns of a through-wall unit (TWU) according to the air conditioning needs of the ocupants, it is necessary to confirm the indoor thermal environment and natural ventilation effects by the operation patterns. CFD analysis was performed utilizing Building Information Modeling (BIM) and the outdoor fan characteristics of a TWU by a full-scale performance experiments. It was confirmed that the airside economizer mode using the outdoor fan on an improved TWU supplies a sufficient ventilation rate of about 4.5 ACPH to the office and it can provide a good indoor thermal environment during no wind conditions. In addition, CFD analysis using the night-time cool breeze mode with consideration of the surrounding buildings was conducted. As a whole, a good indoor environment of about 26 to 27°C could be obtained with about 3 ACPH ventilation and a cool breeze effect. It was confirmed that by conducting precise analysis on the whole building, a stable effect was obtained, regardless of the difference in building height and wind direction.
Influence of air leakage from building façade on the energy efficiency of air conditioning system in Tropic Asia
Authors: Mabuchi Yukiko , Ichinose Masayuki , Chaloeytoy Kittiwoot , Yamauchi Ro
Published: August 2019

Many buildings are being built in Southeast Asian cities due to rapid economic growth. Because large-scale buildings, such as office buildings, in particular, consume a large amount of energy, it is essential to construct environmental buildings for global climate change. Despite the improving airtight performance of building envelopes for effective energy saving, almost no research regarding them in Southeast Asia is done at present. Therefore, this paper aims to determine the current state of energy conservation effects of office buildings in Asian cities. This research adopts on-site measurement and energy-simulation methods to evaluate the sealing performance of the office building envelope in Bangkok, Hanoi, Hong Kong, Singapore, and Taipei. In the field survey, the CO2 leakage rate from the building envelope, covered with a vinyl cloth, is investigated using the tracer gas method. In addition, air quality, internal and external differential pressure, and energy consumption are measured. Furthermore, indoor environmental quality such as temperature, humidity, wind speed, CO2 density, clo value and MRT are measured. The evaluation of the energy conservation performance of the target buildings is multifaceted. In the energy simulation part of this study, actual data are used with simulation software to calculate the energy performance of the heating and cooling load. This research is focused on energy conservation in Hanoi because the amount of air leakage was higher there than the other cities in Tropical Asia. Furthermore, we verified how much of the energy conservation is realized by changing the performance of the air leakage in the model. This paper discusses the current situation of Asian buildings in terms of the results and suggests an appropriate energy conservation model for Asian tropical office buildings.
Development of Urban Timber Buildings using Glued Laminated Timber having Fire Resistance
Authors: Miyazaki K , Matsuzaki H
Published: August 2019

In Japan med- and high-rise timber buildings have started to spread in urban areas, based on the building regulations that differ from those in Europe, the cost of timber materials, and the culture for use of timber. It is considered that the use of timber materials in med- and high-rise buildings in urban areas is essential for the environmental and economic sustainability of Japan, which is a major forest country, so we are promoting the development of technologies for use of timber materials in buildings. There are 15 projects in which the fire resistant glulam materials and CLT that satisfy Japan’s fireproof standards have been applied, including those currently being designed.
Design, decision-making and trade-offs in the Centre for Sustainable Development (La Maison du développement durable) in Canada
Authors: Oliver A , Leoto R , Lizzaralde G , Petter A M , Roy N
Published: August 2019

In order to fight climate change and reduce carbon emissions, professionals in the construction sector often strive for optimal mechanical / technical solutions and assume that a “best” solution exists at a given time and in a given place. But what happens in sustainable building projects when different sustainability or project objectives run at odds with one another? The Maison du développement durable or Centre for Sustainable Development (CSD) – a LEED platinum certified building — is recognized as one of the most sustainable buildings in Canada. This mixed-use building, conceived to be a social and environmental hub in downtown Montreal, houses 3000 m2 of office space and conference rooms. The design included a series of innovations, such as a five-storey biofiltering wall and an under-floor air delivery system. In 2018, the Fayolle-Magil Construction Research Chair in Architecture, the Building Sector and Sustainability from Université de Montréal and the Canadian NGO Équiterre partnered to conduct a post-occupancy evaluation (POE) of the MDD. The study focused on six functional and architectural aspects of the MDD and involved analyzing 12 integrated design workshops, dozens of project documents, and specifically gathering new data. The results show that finding what is “best” is not what happened in reality. Instead, professionals were required to make a series of trade-offs in decision-making. Some examples of these tradeoffs include: adaptability vs. cost, air quality vs. energy performance, shared spaces vs. building floorplate efficiency, and innovation in the design phase vs. long-term operations. This paper shows that tradeoffs adopted during the design phase impacted the MDD’s performance. The results of this study are not only valuable to the project’s partners, but also to the construction industry in general, offering insight into design compromises in sustainable office buildings.
“Embodied and Operational Carbon of Typical Heating, Ventilation and Air Conditioning (HVAC) Systems in Office Buildings in Washington State: A study of buildings registered under LEED v3 2009”
Authors: Rodriguez BX , Amany L , Simonen K
Published: August 2019

Heating, Ventilation and Air Conditioning (HVAC) systems contribute significantly to operational energy and CO2e emissions during the service life of office buildings. Over the last decade, stringent energy codes have enabled the introduction of new HVAC technologies to reduce operational CO2e emissions. However, life cycle carbon emissions of buildings are odivided into operational carbon (OC) and embodied carbon (EC). Operational carbon are the CO2e emissions generated from the burning of fossil fuels used to heat, cool and power the building space during its service life, while EC encompasses the CO2e emissions equivalent to producing, procuring, installing, mantaining, repairing and disposing of the materials and components that make up the building. Over the last decade, broad efforts have improved the understanding of the role that HVAC system selection play in overall OC, nevertheless, EC of HVAC has remained unexamined This paper aims to identify typical HVAC systems used in office building design in Washington State and explore the effects of current practice on total energy use, operational and embodied CO2e. The study sample is composed of twenty office buildings in Washington State registered under the LEED v3 2009 version, from which 15 have obtained LEED certification in the last two years. The projects are registered under the New Construction (NC), Core and Shell (CS), Existing Buildings and Operation and Maintenance (EB:OM) and Commercial Interiors (CI) products and comply with the requirements established in the ASHRAE 90.1-2007 energy standard. The results show that typical HVAC system selection is often a combination of different technologies for ventilation, heating and cooling, and that in general: smaller buildings tend to incorporate high efficiency packaged units while medium and large size buildings typically rely on High Performance Variable Air Volume (HPVAV) systems or hydronic systems such as chilled beams and water source heat pumps (WSHP). The results also indicate that data available through the LEED v3 2009 documentation system on embodied carbon of the mechanical systems is limited and that simplified methods to assess embodied carbon of HVAC are needed in order to integrate EC into whole life assessment of Mechanical Systems.
Approachable ZEB (Zero Energy Building) (Part.2) - ZEB for Everyone -
Authors: Shiraishi K , Ishibashi R
Published: August 2019

In addition to policy target in Japan (ZEB (Zero Energy Building) is scheduled for new buildings on the average by 2030), the efforts to decarbonize corporate activities are accelerated and private needs of ZEB is growing after Paris Agreement. On the other hand, most of owners tend to be careful to invest in ZEB due to high cost to realize ZEB in general. With above background, we’re promoting ZEBs at the same cost as general buildings and have designed and built “Office-TS and Office-AI” as model projects of ZEB to meet such private needs of ZEB. Based on our policy to provide ZEB with a lot of owners by reasonable cost, economically ZEBs are realized with design of both comfort and ecology by optimum combination of general technologies with excellent cost –performance. Currently in general, most of other existing ZEBs are the demonstration projects implemented by Design or Construction Companies, therefore, it is very advanced examples to provide ZEBs with general private clients. “Approachable ZEB” which can be realized economically will contribute sustainable corporate activities of many owners and sustainable social foundation. In below actual two “Approachable ZEB” projects are introduce; Office-TS has set an energy-saving target of  (more than 75% energy saving) and Office-AI  (more than 50% energy saving). Both are realized with the general technologies also with the same cost level as other general non-ZEB projects.
Approachable ZEB (Zero Energy Building) (Part 1) - Current situation of our latest projects for ZEB -
Authors: Takai Hiroaki , Hirai Masako , Ishiguro Takeshi , Kojima Fukuo
Published: August 2019

We introduce the outline of the ZEB buildings we designed. Then, we analyse the plots on the ZEB chart, the completion year, the building type, the characteristics of these building, and the possibility of realizable ZEB, etc. And we mention the planning method to achieve ZEB Ready, and Nearly ZEB with less cost. And in this report, the breakdowns of reduction rates with reference to the standard energy consumption are described in figures of energy indicator in all these ZEB ready to Net ZEB projects. Such descriptions are also rare in WSBEC. Also, it seems that there is little description in WSBEC that refers to the relationship between the increase in investment costs and the reduction in energy costs. Taking care of the the clients, we do not mention in this report, but we will make oral comments at the oral presentation.
A study toward the realization of net zero energy building in urban areas
Authors: Tanaka Takuya
Published: August 2019

In this paper, we report the results of an empirical study on an urban ZEB pilot building constructed in May 2014. The objectives of the research are to develop individual elemental technologies for ZEB and to demonstrate the energy of the entire building. In order to realize and popularize urban ZEB, we have developed and demonstrated a facade design that makes maximum use of the outer walls of buildings, a lighting system that utilizes a skeleton ceiling made of reverse beams, and a core radiation heating and cooling system. As a result of the demonstration while actually operating it as an office building, PEB was achieved with an annual energy balance of 43 [MJ/m2a], energy consumption : 437 [MJ/m2a], energy generation : 480 [MJ/m2a]. In addition, we will report the results of the demonstration on the characteristics such as peak power of buildings obtained through the operation and future problems such as reduction of standby power. As a result of this demonstration, it was possible to extract elemental technology necessary for realization of ZEB in urban areas, building scale, future problems, etc.
Analysis of Heat Accommodation Effect in District Heating and Cooling Systems
Authors: Inoshita Y , Sumiyoshi D , Akashi Y , Kitora H
Published: August 2019

The purpose of this research is to investigate a method to improve the efficiency of heat source systems in two buildings by heat accommodation of cold/hot water between two facilities, and to clarify the energy saving effect. In this report, measured value analysis and simulation on the representative days are carried out. Heat source systems in two buildings located east and west across a road are targeted as the east district system and west district system. Overall, the equipment in the west area has better performance. First, the heat accommodation effect was verified by a measured values analysis. The analysis was carried out by comparing the representative days. Improvement of the east district SCOP was seen when remitting cold heat from the east district to the west district. In addition, it was confirmed that the heat recovery heat pump was operated by remitting hot water from the west district to the east district, and total SCOP of both districts improved. Next, efficiency is analyzed using a simulation model. We conducted a simulation to shift the load of each district and examined effective heat accommodation control. As a result of the simulation on the representative day, by remitting the load in the west district to the east district during the night and remitting the load in the east district to the west district during the day, heat recovery heat pump in the west district operated more, and the total SCOP of both districts improved. Examination by the measured value analysis and simulation showed that control to operate heat recovery heat pumps in the west area more is effective.
Detecting Anomalous Energy Consumption from Profiles
Authors: Abe Hiroto , Bogaki Kazuaki , Rijal H.B. , Sugiyama Mahito
Published: August 2019

Controlling and reducing electric energy consumption is a critical issue across all over the countries for human wellbeing. However, approaches to achieve energy consumption reduction of individual occupants have not been established yet as both problems of collecting a large amount data of energy consumption and constructing prediction models are challenging. Here we show a case-study of energy consumption analysis, in which households with anomalous energy consumption can be completely detected using a questionnaire about their profiles without seeing actual energy consumption. Our approach is based on simple data mining techniques of outlier detection and decision trees, hence it can be easily implemented in the condominium housing market.
Refurbishment of UK school buildings: Challenges of improving energy performance using BIM
Authors: Al Bunni Asem , Shayesteh Homeira
Published: August 2019

UK Schools are part of the existing buildings whose operational carbon must be reduced to meet the government target of reducing carbon emissions to 80% by 2050. State funding for refurbishment is the most feasible option using two routes: Condition Improvement Fund (CIF) which is restricted to improving the physical aspects of school facilities; and Salix Energy Efficiency Fund (SEEF) aimed at energy/equipment retrofit measures. Although the use of BIM technology (underpinned by the government soft-landing (GSL) framework) together with the use of energy modelling/simulation tools have become integral to making buildings more energy efficient, they are constrained by lack of adoption. This study used primary and secondary data to investigate the effectiveness of contemporary BIM and energy simulation technologies in refurbishment of existing school buildings. Secondary data collected from 10 case studies of schools that benefitted from SEEF was supported by primary data from survey questionnaire of 126 professionals involved in refurbishment. Results showed that: (a) CIF and SEEF ought to operate in synergy due to the interaction of a building’s physical envelope with heat transfer and energy used by equipment and systems; (b) refurbishment professionals are not fully adopting BIM which in turn affects managing the buildings in their operational phase; and (c) some schools are not getting technical advice on how to optimise the funds they receive from SEEF leading to non-optimal investment. Recommendations provided include: extensive training on BIM and GSL to heads of schools; upskilling of professionals on using building pathology techniques that are compatible with BIM together with COBie and NBS Toolkit; advise government agencies to reconcile the purpose of CIF and SEEF for carbon reduction solution in schools.
Development of Single and Combined Fan-Use Models in Japanese Dwellings
Authors: Imagawa H , Rijal H B , Shukuya M
Published: August 2019

Thermal adjustment is one of the most important behaviours. In daily life, we use some behavioural adjustments for thermal comfort. Especially, fan use is most common adaptive behaviour for the active thermal adjustments. The occupant behaviour stochastic models were proposed by some previous studies. However, the relative proportion of each behaviour has not yet been fully understand. It is important to estimate the proportion of each behaviour relatively because the selection of abehaviour is determined in relation to each others. In our previous study, the stochastic models of window opening/closed, cooling and heating use were integrated to one model. The integrated fan use model is useful for understanding the occupant behaviour. The objective of this research is to clarify the fan use in relation to the window opening and cooling use. The occupant behaviour surveys were conducted in 120 dwellings during a four-year period in Kanto region of Japan. From this survey, we have collected 36, 114 responses. The major findings are: 1) The proportion of fan use was highest in summer; 2) The stochastic model of fan use was explained by outdoor air temperature, and the combined stochastic model of “fan use” and “window opening or cooling use” were also developed; and 3) The proportion of “combined fan use” was higher than that of “fan single use”. The results indicated that the residents use the fan together with some other thermal adjustments. The knowledge of this research, as the next step of research, will be implemented in building thermal simulation.
Analysis of electricity usage habits based on electricity and hot water supply demand detail measurement of 10 houses
Authors: Kihara M , Ikegami T , Sumiyoshi D , Choi Y , Yamamoto T , Ogino T
Published: August 2019

In recent years, energy-generating devices such as residential use fuel cell cogeneration systems (FCCGS) have been spreading. A solid polymer electrolyte fuel cell (PEFC), which is a type of FCCGS, determines the amount of power generation and power generation time according to the demand for electricity and hot water supply in houses. Therefore, residents’ lifestyle influences a PEFC’s load following speed and efficiency. However, there are few actual surveys of household electricity and hot water supply demand, and we haven’t fully grasped factors that affect them. Therefore, we aim to acquire home electricity and hot water usage habits that affect PEFC operation by measuring detailed electricity and hot water supply demand in 10 houses in Japan. In addition, we also conducted a questionnaire survey for the households and analysed the influence of resident’s behaviour on demand for electricity and hot water supply. We can’t see instantaneous changes in the amount of PEFC generated based on hourly data, so we measured the electricity consumption of the entire house and the electricity consumption and hot water consumption of each household appliance every 2 seconds. In this report, we analysed the usage habits of home appliances.
Appropriate indoor environment for southeast asian people; physiological and psychological responses to humidity
Authors: Kawakami R , Hasebe H
Published: August 2019

The purpose of this research is to verify the necessity to control indoor humidity in Southeast Asia, while the setting temperature of indoor air is increased for energy-saving. Therefore, physiological and psychological responses to ambient humidity were studied using subject experiments in a climate chamber where indoor air condition can be controlled at discretion. For easily finding the characteristics of Southeast Asians, two subject groups, hot humid and temperate natives, participated in the test. As a result, this study revealed an existence of the variation in the physiological and the psychological reactions to a change in ambient humidity, regarding hot humid natives. In particular, a surrounding with high humidity tend to reduce heat flux on forehead and humidity acceptability. These circumstances could not be found in the temperate natives. The conclusion drawn from our experiments is that it is necessary to control not only indoor temperature but also humidity in the case of a building where there are occupants coming from hot humid locations. However, it remains a challenge for future researches to investigate the amount of sweating, physiological and psychological responses of the whole body and the influence of long-term acclimatization for artificial environment upon physical and mental well-being.
Applicability of an ‘uptake wave’ energy transition concept in Indian households
Authors: Neto-Bradley A P , Choudhary R , Bazaz A B
Published: August 2019

Reliable, secure, and affordable energy services are essential to ensuring sustainable economic and social development in the rapidly growing cities of the Global South, yet in India over 30 percent of urban households are still reliant on traditional fuels such as biomass and kerosene for some portion of their energy needs. Understanding the factors that influence energy transitions at a household level, is essential for successful strategies to promote the uptake of cleaner fuels and deliver associated socio-economic benefits. Such fast-growing cities often display intra-urban inequalities of considerable magnitude which can condition individual access to resources and impact the effectiveness of energy provision strategies for individual city districts. In this paper we will use the results of a survey of 500 households in Bangalore, India and explore how this data compares with the ‘wave concept’ model of energy transition. This ‘wave concept’ view of energy transitions focuses on appliance ownership as a proxy for energy services and conceptualises the uptake of appliances as a wave with early and late adopters rather than an income-based step change, and as a result better accounts for the role of non-income factors. The wards targeted by the survey cover a range of low-income ward typologies characterised by factors including income, livelihoods, building construction, socio-cultural factors, access to fuels, and reliability of supply. Validating an appropriate model for the uptake of new energy technologies and fuels in households, can better inform policy makers, entrepreneurs, and engineers on the influence of non-income barriers to energy transition across different districts of a city. By understanding how households use energy, and what limits the adoption of more efficient technologies at a local level, city planners and engineers can develop targeted sustainable strategies for adoption of cleaner more efficient fuels and appliances in households.
Rural Household Energy Use and Thermal Environment in Three Climatic Regions of Nepal
Authors: Tika Ram Pokharel , Hom Bahadur Rijal , Shukuya Masanori
Published: August 2019

Nepal is a mountainous country with low energy use so far and its climatic patterns remarkably differ from one place to another due to its geographical variation. In the north summer is cool and winter severe, while in the south summer is tropical and winter is mild. Indoor thermal environment and household energy use of residential buildings are in general very much associated so that there have been guide a lot of research; however, there has not been sufficient number of such studies focusing on Nepal. In this study, we aim to analyze the current situation of household energy use and indoor thermal environment of residential buildings in three different ecological regions of Nepal. This study was carried out in mountain, hill and terai regions representing cold, temperate and sub-tropical climate in Nepal from 21st December, 2017 to 20th January, 2018. Indoor and outdoor air temperature and humidity were measured by electronic sensors with the help of data logger for every 10-minute interval from 5 households from each region. The mass of firewood used was also measured at those houses. Household energy-use data of 516 houses were collected by the method of questionnaire survey. We found that mean indoor temperature was 3.6°C, 9.4°C and 19.0°C in cold, temperate and sub-tropical regions respectively. Based on this field study, we concluded that firewood is the primary source of household energy for cooking. The present finding suggests that an intensive and extensive improvements of the indoor thermal environment together with rationalization of energy use must be important especially for winter seasons.
Development of Tb-Dy-Fe Detection Transducer
Authors: Sun Wen , Sun Jie , Xu Kehua
Published: August 2019

The erbium-dysprosium-iron magnetostrictive alloy is used as the acoustic generator of ultrasonic detection transducer. According to the characteristics of the magnetostrictive alloy, the alternating magnetic field is generated by the altering current of the coil around the magnetostrictive rod the circuit system. As the magnetic field changes, the magnetostrictive rod will produce stretching deformation along the axial direction, which drive the radiation plate vibrate and generate ultrasonic wave. The TbDy-Fe detection transducer has the advantages of simple structure, fast response and large output power so that can be used in various field of industrial detection.
Research on Evaluation of Coal Enterprises Sustainable Development
Authors: Liu Na
Published: August 2019

Based on AHP method, this paper built the evaluation model of coal mine sustainable development and calculated weight of each indicator, the essay aims at providing an effective method for the scientific development of coal mine. In addition, on the basis of the evaluation index system of sustainable development, the fuzzy comprehensive evaluation method was used to comprehensively evaluate four major coal mines of Shen Yang Coal Industry Group.
Industrial Application Research of Portable Video Recorder based on LabVIEW
Authors: Tao Changxing , Chang Xincai , Guan Jishi
Published: August 2019

In this paper, a portable test recorder is designed and manufactured. As an open test system, the recorder can be self-configuring according to the requirements of measurement tasks to realize the acquisition, analysis and processing of various equipment signals, to meet the needs of high-range, high-precision and multi-channel measurement. At the same time, the recorder has the advantages of compact, portable, wide application range, friendly man-machine. Interactive interface and flexible operation can meet the complex test environment in industrial field. The recorder has been applied to the test of 9020 series plates in a nuclear power plant in China. It provides accurate measurement basis for plate detection and solves the problem of high range and high precision of 9020 series plates in a nuclear power plant.
Construction and simulation of explosion-proof electric proportional pump for mine
Authors: Shen Wei , Wang Qingyun
Published: August 2019

In view of the contradiction between explosion-proof and electric proportional speed regulation, a kind of explosion-proof electric proportional hydraulic pump is developed, which can be used in underground roadways by taking 90 series hydraulic variable pump as a model and carrying out appropriate modification and explosion-proof treatment of its speed regulation system. The speed regulation characteristics of explosion-proof electric proportional hydraulic pump are simulated and analyzed by AMESim software. The feasibility of the scheme is verified by comparing the experimental results with the simulation results.
Effects of Trace Elements on the Properties of Copper from First-principles Calculations
Authors: Zhong Mingjun , Peng Cheng , Huang Fuxiang , Liang Shuang , Wu Baoan , Tang Huiyi , Luo Weifan
Published: August 2019

The effects of X elements (Ag, Ni, Si, Zr, Mg, Al and Zn) doping with amount of 0.926 at% on the structural, mechanical and thermodynamic properties, as well as the electrical properties of Cu were calculated systematically using a first-principles density functional theory (DFT). The calculated formation enthalpy and binding energy indicate that all the Cu107X alloys can be formed and are thermodynamic stable. The B/G values of Cu dilute solutions are between 2.1 and 3.1, both are greater than 1.75, the Poisson’s ratios ν are between 0.295 and 0.355, which means that all of Cu107X are plastic materials. Cu107Si and Cu107Zn had the larger Vickers hardness, the value of which were 6.18GPa, 5.97GPa, respectively. By means of molecular dynamics and the Kubo-Green-Wood formula, the electrical conductivities of Cu108 and Cu107X were calculated, the results show that all elements doping will reduce the conductivity of Cu, and the conductivity of Cu107Ag in Cu107X alloys is the largest, and its value is 3.56*107S/m.
Study on construction schedule optimization of bored pile based on genetic algorithm
Authors: Hu Hesong , Ji Xuan , Liang Huqing
Published: August 2019

The site construction management of traditional filling pile has some disadvantages such as redundancy of data, difficulty in finding data, low working efficiency and poor timeliness. Thus, combined with the actual needs of filling pile construction management, based on the Java language, the mobile phone client of filling pile construction information management system was developed, and the mobile client system framework, operating process and functional framework were designed and illustrated. The software provided an advanced management method for the filling pile construction, it had great value to guarantee the construction progress and improve the information level of construction management.
Practice of Outburst Prevention Technology for Uncovering No.2 Coal Seam in Donger Return Air Shaft of Weijiadi Coal Mine
Authors: Zhang Jufeng , Xu Tai , Yang Fengfeng , Zheng Chao , Zhang Jianjiang , Miao Zaiquan
Published: August 2019

In Weijiadi Coal Mine, the No.2 coal seam is uncovered by the Donger return air shaft. According to the concept of “regional measures first, local measures supplement”, the measures are taken strictly in the outburst seam, the gas pressure P=0.2MPa and the gas content W=1.4729m3/t in the coal seam are determined by preconstruction prediction drilling, and there are no gas dynamic phenomena such as drilling jam and sticking in the drilling process. It is proved that there is no outburst danger, and then it is implemented according to the local “four in one” outburst prevention measures. The maximum gas pressure determined is 0.2 MPa in the working face, and the validity check is still no outburst danger. Finally, safety protection devices are installed in the working face to ensure the No.2 coal seam to be uncovered smoothly by return air shaft.
Increasing drilling speed in long horizontal intervals in Aktobe Kazakstan
Authors: Zhang Xiaoning , He Anle , Yan Jun , Shi Libao , He Zhenguo , Kong Lulin
Published: August 2019

The Aktobe project is at the east margin of the Pre-Caspian Basin, where horizontal well is mainly used to develop the low porosity and permeability layers. To improve production per well, the horizontal interval increased from +/-400m to +1000m. Due to complicated geological structure, variable boundary and thickness of target layers, the RSS was employed to improve the rate in layer. But the average ROP was just 2.36m/hr, and average footage was just 335m per bit due to high strength of the formation. To solve this problem, the wearing characteristic of PDC bits was analyzed. The BHA and table rotary speed were optimized on the basis of drilling pipe vibrating calculation. Thus, the drilling technology for hard and long horizontal interval, including high performance PDC bit, RSS, PDM, BHA with 1/2 stabilizer, has been worked out. The technology was used in 5 wells, of which 4 wells at 60 rpm, had stick-slip index of less than 80%, the drill bits out of the wells had few cutters broken by vibrating; 1 well had stick-slip index of higher than 80% at 70-80rpm, and the drill bits out of the well had many cutters broken by vibrating. Compared with Well H814, the horizontal section drilling time shortened from 22.5d to 9.6d, by 57.7%, ROP increased by 261.4%, and the footage increased by 195.5%. The optimized horizontal drilling technology for hard formation could provide reference for the drilling of similar hard formation, especially for the other oilfields in the Pre-Caspian Basin.
Test principle and measuring method of friction coefficient of drilling fluid lubrication tester
Authors: Wang Xiaojing
Published: August 2019

This paper introduces the test principle of the friction coefficient, and then introduces its measurement method, which provides a theoretical basis for the overall design of the tester. We propose the following scheme: design a set of DC pulse width modulation (PWM) servo control system with microprocessor as the control core. The whole system needs to detect four physical quantities: motor speed, motor armature current, excitation current and pressure. The current transformer is used to detect the armature current and excitation current of the motor, and the friction coefficient and film strength are converted by microprocessor to keep the excitation current constant. The speed sensor is used to detect the speed of the motor, the pressure sensor is used to detect the applied pressure, and the microprocessor is used to realize the automatic control of the speed.
Research on the development of innovative petroleum geological exploration technology
Authors: Bi Ergang
Published: August 2019

Petroleum resources are of great significance to the development of China’s economy. The petroleum geological exploration technology has undergone a long development, and the application of exploration technology has made great progress. With the continuous increase of mining intensity, the exploitation depth of oil is increasing and the difficulty coefficient is increasing, which poses more difficult challenges for petroleum geological exploration work. Therefore, the development of innovative petroleum geological exploration technology has very important strategic significance, which determines the future development direction of China’s petroleum industry. This paper will introduce China’s existing petroleum geological exploration technology, and introduce the direction of oil exploration technology development, and at the same time formulate relevant development strategies.
Risk Analysis of Debris Flow hazardsin Yanbian Prefecture Based on Information Quantity Method
Authors: Fang Jinpeng , Quan Hechun
Published: August 2019

Taking the Yanbian Prefecture as the study area, this paper selects 8 influencing factors: elevation, slope, slope direction, precipitation, river, lithology, fault and land use. Taking 163 debris flow points as sample data, information quantity method and GIS platform are introduced to calculate the information amount of each influence due to sub classification. The risk assessment and analysis of debris flow were carried out, and the risk assessment and analysis map of debris flow in Yanbian was drawn. The results show that the areas where the debris flow hazard is more dangerous are in good agreement with the historical debris flow, and the accuracy of the methods and factors used in this paper is verified.
Study on the magnetite genesis and metallogenic age in Chedu gold deposit, Bikou block
Authors: Wang Dequan , Deng Shengbo , Wang Yizhong
Published: August 2019

The Chedu gold deposite is located in the south rim of bikou terrane. It is the first BIF-type gold deposit in shaanxi province. Magnetite and quartz bands can be seen in the magnetite quartzite type gold ore. According to the electronic probe analysis results, we find that the ratio ofTFeO to oxide is from 98.90% to 99.87% and the levels of TiO2, MgO, A12O3 and MnO are low in single particle magnetite. It is suggested that the magnetite in gold ore is the cause of sedimentary metamorphism. In addition, a total of 22 of the 35 electronic probe analysis data implying that the magnetite was not visible. The maximum is 0.105%. Through the analysis of geochemical samples, the gold grade is proportional to the iron content.The isotope age of the Bikou group is between 764 and 1611 Ma. The indirect method proves that the Chedu magnetite quartzite gold deposit was formed in the Middle Proterozoic-Neoproterozoic.
Thermodynamic analysis of supercritical water gasification of oleic acid for hydrogen production
Authors: Yang Chuang , Wang Shuzhong
Published: August 2019

In this study, the equilibrium behaviour of palmitic acid in supercritical water gasification was investigated, using the Gibbs minimum free energy employed within the HSC. The effects of concentration, temperature, and pressure on gas production were studied. The model predictions have been validated by comparing the results with published literature under identical conditions, and the agreement is generally satisfying.
A Review of Multi-field Coupling Simulation of Wellbore and Heat Reservoir in Enhanced Geothermal System
Authors: Shan Dandan , Yan Tie , Li Wei , Sun Shihui , Lu Guangdong , Zhao Huan
Published: August 2019

Enhanced geothermal system (EGS) is the most effective mining method for deep dry hot rock resources, and has a broad application prospect. In recent years, it has been widely concerned by all countries around the world. In this paper, the coupling analysis of wellbore and heat storage is carried out. Furthermore the coupling simulation of unsteady heat flow in wellbore and formation, the multi-field coupling simulation of multi-scale heat storage, as well as the multi-field coupling simulation of wellbore and heat storage are deeply analyzed. The research statuses, the positives and negatives, and the future prospects of above model in the application of EGS are described. After summarizing and analyzing the above three research contents, the following suggestions are proposed:(1) Previous research on EGS mainly focuses on the simulation of multi-field coupling in the heat storage, and the heat transfer between the wellbore and the formation is often neglected. Therefore, the coupling between the wellbore and the heat storage should be overall considered, and the flow heat transfer in slender wellbore should be studied. (2) The unsteady heat flow coupling simulation between wellbore and formation did not conduct in intensive study on the wellbore heat transfer of geothermal Wells, the characteristic of geothermal wells is including an aquifer, and the heat transfer in annulus is not involved, the strata should be layered, and considering the heat conduction in annulus, so a more practical heat flow coupling model will be obtained. (3) In order to promote the development of multi-field coupling simulation theory of fractured rock mass, the mechanism of fracture generation and propagation should be deep-going studied to obtain more realistic fracture network distribution patterns.
Researches on Qualitative Recognition of Flushed Zone in Q Block on Deep Forest
Authors: Su Rui
Published: August 2019

In this paper we propose a method on qualitative recognition of flushed zone. We extract the morphometric parameters of logging curves to better reflect the change relations. We use deep forest model which learns the representation layer by layer. The model is more robust and have a higher accuracy than other model. This method has an excellent application performance in Q block.
Application of Density Curve Reconstruction Technology in Seismic Inversion
Authors: Yue Guo
Published: August 2019

Density curve is one of the indispensable data for impedance inversion. However, the limitation of density logging often results in the loss of density curve. The common solution is to use empirical formulas, such as Gardner formula, to reconstruct the density curve, but the effect is often not ideal. In order to solve this problem, the authors propose to reconstruct the missing density log curve by means of multiple linear regression, and then carry out geostatistical inversion by using the curves with high correlation between natural potential, gamma, resistivity and density curve. Finally, by comparing the inversion results of the two parameters, the inversion results of the former have a significant improvement in the coincidence rate of the posterior wells and the horizontal distribution of sandstone, which proves that the method has a significant application effect in reservoir prediction and lithologic sensitivity.
Evaluation of Asymmetric Fractures on Acid Fracturing Well
Authors: Li Ke , Zhou Jun , Yang Jing , Zhou Linbo
Published: August 2019

Because of the heterogeneity of acid corrosion, acid fracturing effect is difficult to assess, and how to make use of acid fracturing construction data to guide fracturing design have always been concerned by scientific researchers. Several shutdown processes have been existed in acid fracturing construction, this is similar to the process of injection and falloff well test. In this paper, basic principle of seepage mechanics and injection pressure drop well test interpretation theory are used to establish injection pressure drop mathematical model with considering the influences of asymmetric fractures. The influence of asymmetric fracture geometry and fracture number on pressure double logarithmic curve have been analyzed. The method presented in this paper to analyze the pressure drop data can better explain the fracture parameters and general effect of acid fracturing construction.