title: Compressor shaft work targeting using new numerical exergy problem table algorithm (Ex-PTA) in sub-ambient processes

authors: Hamsani, Muhammad Nurheilmi

abstract: One of the major challenges faced by energy intensive industries is an excessive greenhouse gas emission to the atmosphere due to high consumption of fossil fuels throughout the production processes. Due to high electricity usage in intensive industries, it is strongly advisable to all the engineers and other stakeholders to reduce the amount of energy needed for production, thus reducing carbon footprints. This is because the power generation industry emits approximately 37 % of total carbon dioxide emission to the atmosphere. Process improvement via Process Integration enhances the process energy efficiency, which contributes to the minimisation of fossil fuels and electricity consumption. Sub-ambient processes with refrigeration system are one of the highly energy intensive processes, which consumes a vast amount of electrical energy to run the compressors for fulfilling the process cooling demand. It is crucial to optimise the process-utility heat transfer in the system including the placement of compressors and expanders to minimise the exergy losses and shaft work consumption. This paper presents a combined energy analysis technique of Pinch Analysis and Exergy Analysis to determine exergy losses and compressor shaft work targeting in sub-ambient processes via a novel numerical approach known as the Exergy Problem Table Algorithm (Ex-PTA). The validity of the novel approach is demonstrated by using an illustrated case study. Based on the new numerical method, the total exergy loss in the process is 4.42 kW which is equivalent to 7.4 kW potential savings of compressor shaft work. In the economic analysis, the wasted potential shaft work costs a loss of approximately 19,926 MYR/y which should be avoided to minimise process operating cost.

text: Compressor shaft work targeting using new numerical exergy problem table algorithm (Ex-PTA) in sub-ambient processes One of the major challenges faced by energy intensive industries is an excessive greenhouse gas emission to the atmosphere due to high consumption of fossil fuels throughout the production processes. Due to high electricity usage in intensive industries, it is strongly advisable to all the engineers and other stakeholders to reduce the amount of energy needed for production, thus reducing carbon footprints. This is because the power generation industry emits approximately 37 % of total carbon dioxide emission to the atmosphere. Process improvement via Process Integration enhances the process energy efficiency, which contributes to the minimisation of fossil fuels and electricity consumption. Sub-ambient processes with refrigeration system are one of the highly energy intensive processes, which consumes a vast amount of electrical energy to run the compressors for fulfilling the process cooling demand. It is crucial to optimise the process-utility heat transfer in the system including the placement of compressors and expanders to minimise the exergy losses and shaft work consumption. This paper presents a combined energy analysis technique of Pinch Analysis and Exergy Analysis to determine exergy losses and compressor shaft work targeting in sub-ambient processes via a novel numerical approach known as the Exergy Problem Table Algorithm (Ex-PTA). The validity of the novel approach is demonstrated by using an illustrated case study. Based on the new numerical method, the total exergy loss in the process is 4.42 kW which is equivalent to 7.4 kW potential savings of compressor shaft work. In the economic analysis, the wasted potential shaft work costs a loss of approximately 19,926 MYR/y which should be avoided to minimise process operating cost.

year: 2018

title: Narrative navigation: visualizing story order and locations in augmented reality

authors: Zhang, Qimo

subjects: computer science

abstract: Narrative Navigation connects mobile storytelling with geolocations and Augmented Reality (AR). Narrative Navigation is designed to help users better understand a story. In this paper, we introduce our mobile app prototype that guides users to the physical locations of a story using AR flags. We indicate not just story locations and the user’s distance to those story points, but also show the flow of a story through its geo-locations. The prototype thus provides users with a new way to immerse themselves in a locationbased story

text: Narrative navigation: visualizing story order and locations in augmented reality Narrative Navigation connects mobile storytelling with geolocations and Augmented Reality (AR). Narrative Navigation is designed to help users better understand a story. In this paper, we introduce our mobile app prototype that guides users to the physical locations of a story using AR flags. We indicate not just story locations and the user’s distance to those story points, but also show the flow of a story through its geo-locations. The prototype thus provides users with a new way to immerse themselves in a locationbased story

year: 2020

title: Creating whanaungatanga: Kaupapa Maori support in the Psychology Department at the University of Waikato

authors: Masters-Awatere, Bridgette

subjects: Maori students

abstract: Attendance at university has been recognized by some as a competitive environment that does not cater for the co-operative philosophy followed by many Maori.  Within the Psychology Department at the University of Waikato there have been efforts since the Departments early days to place emphasis on the Maori cultural experience, but there were few Maori students and no Maori staff back then.  Now, in 2004, the Department has a team of Maori staff and courses with Maori content at both undergraduate and graduate levels.  Yet the environment that the students move in is still competitive. Grades are based on individual assessment through undergraduate level. At graduate level the emphasis on group dynamics comes to the fore.  The availability and accessibility of Maori staff at different levels in a Kaupapa Maori programme provides one of the strategies of support for maori students at Waikato.  This paper discusses the issues around managing, delivering and providing opportunities so that Maori students studying psychology feel supported for the duration of their time at Waikato University.

text: Creating whanaungatanga: Kaupapa Maori support in the Psychology Department at the University of Waikato Attendance at university has been recognized by some as a competitive environment that does not cater for the co-operative philosophy followed by many Maori.  Within the Psychology Department at the University of Waikato there have been efforts since the Departments early days to place emphasis on the Maori cultural experience, but there were few Maori students and no Maori staff back then.  Now, in 2004, the Department has a team of Maori staff and courses with Maori content at both undergraduate and graduate levels.  Yet the environment that the students move in is still competitive. Grades are based on individual assessment through undergraduate level. At graduate level the emphasis on group dynamics comes to the fore.  The availability and accessibility of Maori staff at different levels in a Kaupapa Maori programme provides one of the strategies of support for maori students at Waikato.  This paper discusses the issues around managing, delivering and providing opportunities so that Maori students studying psychology feel supported for the duration of their time at Waikato University.

year: 2004-12