Daito Bunka University, Itabashi Campus is the redevelopment of a dense university campus amid the Tokyo Metropolitan area. Its scheme is to build three buildings and two courtyards in three stages after dismantling decrepit library, classrooms and gymnasium. What the architects aimed for was creating new urban-type campus with its spatial low-rise planning design, and with
Project Data
Project Name:Daito Bunka University, Itabashi Campus:first stage Architect:Ben Nakamura - Yamamoto Hori Architects Joint Venture Ben Nakamura(Ben Nakamura and Associates Inc) Keisuke Yamamoto,Keiji Hori(Yamamoto Hori Architects) Structural Engineer:Hanawa Structural Engineers(Central Library) Matsumoto Structural Engineers(Lecture-Hall No.3) Mechanical Engineer:Sogo Consultants Landscape Design:Shunsaku Miyagi + Place Media Landscape Architects Inc Furniture:Fujie Kazuko Atelier Co Ltd Lighting Planning:Reiko Chikada Lighting Design Inc Stained Glass:Sachiko Yamamoto General Contractor:1st stage :Obayashi Gumi 2nd and 3rd stage : Toda Kensetsu co.Ltd Location: Takashimadaira, Itabashi-ku, Tokyo, Japan Main Building Use:University Total Plot Area:27,319.63㎡ Total Floor Area:7,269.23㎡(Central Library) 3,605.76㎡(gym) 8,716.00m(Lecture-Hall No.3) Structural System:Steel frame,RC frame Stories:Underground 1 story,5 Stories above the ground Completed in 2003
A total of 27 methods were implemented to realize the environmentally friendly campus such as renewable building equipments, greening, natural ventilation, cool tubes, heat storage system, photovoltaic generation and ground source utilization. Natural airflow was first considered as an important element in particular. And through the well-thought-out airflow examination, 27 environmental methods were developed integrated with the architectural section and equipments.
27 Environmentally-friendly campus
On the south facing wall and the roof of the building No.3 were covered with clear glass that shows stripe pattern consists of "Seethrough type photovoltaic panels" and horizontal stainless steel pipe louvers alternately. See-through type photovoltaic generation system was developed for this project, which 15cm square readymade solar battery cells are laid at 4cm intervals and sandwiched between two sheets of glass. This panel system was installed approximately 750m2, and has 30 kW of electric generation capacity in total. That interval between each cell was configured so as to take in and shield the sunl ight ef f icient ly. So these see-through type photovoltaic panels have two functions, a photovoltaic generation system and a shielding screen at the same time.
Multipurpose underground conduit, approximately 150 meters in length, was constructed running from the building No.3 to the existing building No.1 via the central building. This conduit works as a cool tube in summer and a hot tube in winter, by the agency of the stable underground temperature at 15 - 20 degrees ( C) all year round. A total of about 54,000m3 fresh air is taken in through the air supply opening beside the building No.3, and transferred to the fresh air handling machine after being cooled down or warmed up while flowing through the underground conduit. The fresh air handling machine additionally arranges the fresh air and sends it out to the under floor of each room in the building. And then that air is slowly blown out from the window side outlet, naturally drawn upward through the vertical void named "Wind Tower" to the exhaust outlet atop the building. Cross-section of the Lecture-Hall & Laboratory Building, showing the natural energy flow system
Experimentally the ground source heat pump system was innovated utilizing the 23 hollow foundation piles, each length of 20 - 25 meters. Inside every hollow pile, the water circulation pipe is inserted. By circulating the water in its hermetically closed circuit, the pipe picks up the geothermal heat that temperature is stable all year round about 17 degrees ( C), and provides cool water in summer and warm water in winter. Its cool / warm water is supplied to the water-cooling heat pump chiller, which is used as a heat source of the flesh air-handling machine. According to the measurement after the completion, the machinery ef ficiency was shown as COP=4.8, which was bet ter than the equipment manufacturer announced as COP=3.1. The buildings were designed with external thermal insulation,wooden sash and double-glazing glass. These specification are basis of the essential building performance, and enabled the adoption of the cool / hot tube and geothermal heat pump system. Cont inuously, other methods such as waste heat storage cogeneration system will be introduced in the second stage of the redevelopment project. Cogeneration system is expected to be the principal method for the next stage. Assessment of environmental and utility design. (in
eco-design for the Daito Bunka University) Estimated thermal transition of circulating ground water 4Floor 5Floor Architects should image the amount of energy flow, and have to get comprehensive energy management system back from engineer's own field. Architects should image the amount of air,water,energ,costs,and the cycle of these life, as well as the image of space, from and lifestyle of
Ecologically Designed Medical, Health, and Welfare Buildings
Project Data
Purpose: Public Health Centre Building Floor space area: 7,525.42㎡ Stories: 8 stories building with 1 story basement. Structure: RC, SRC structure. Concept 1.Medium-high rise architecture reducing 33% CO2 emissions. 2.Healthy government office building where air flows by solar chimney. New government office building was designed following integration of currently dispersed two Public Health Centres into one, aiming at intensifying its function. Minoto Health Centre Building is a complex institution, combining various function and purposes. For the layout, an axis, line of movement, and core of natural ventilation, solar chimney, are located at the centre, securing surrounding flexibility, meeting needs of each floor. Furthermore, in order to secure sufficient floor space needed for health centre operation within a limited compound, made a most use of exterior space such as balconies and rooftop. Public open space is planned, in order to preserve existing trees.  It is located to connect with neighboring green land, as well as contributing to area's greenisation. 1.Medium-high rise architecture reducing 33% CO2 emisions: Taking in environmental consideration points of architecture, checking against the existing situation of the compound, adoptable new energy, renewable energy are implemented. Balcony and rooftop are effectively used, and air-conditioning area will be reduced by about 13%. By exteriorization it is possible to save space, using these space for evacuation route, plumbing space, and equipment installing space. In balcony, pre constructed greening unit, water retaining block bricks were set up, which relieves the outdoor air heat-wise. Furthermore, space is used to let in natural light. Cool heat trench and air hole were arranged, in order to use the underground heat for air conditioning. 2.Healthy government office building where air flows by solar chimney. Eight stories solar chimney is built at the centre of this institution, to create draft power by heated air. The outdoor air is induced indoor through balcony area, which creates pleasant space with fresh air flowing. In summer, surplus air is released, and in winter, warmed up air is used for air conditioning.
Ecologically Designed Public Buildings (2009 Japan Federation of Architects & Building Engineers Associations' Top Prize; 2009 Kanagawa Prefecture Architectural Competition First In order to achieve the education policy; live in symbiosis with satoyama ' s nature, learn from nature, and highten it to a state of art, as though avoiding the trees, building swings 4 times left and right, and placed without opposing landscape of the hill.  Building not holding down the nature, but respecting the feeling of trees, was valued. It was planned so that a small satoyama premises is concluded as one environmental world, Local materials were used in part of wooden structure materials, fixtures and furnishings. Fresh air collected from the forest is heated by underground heat, cooled and sent under floor, wooden chip biomass boiler heats it, and is made into low temperature radiating floor heating. Room air is ventilated discharging air naturally with the draft power of solar chimney. Rain, sewage and other waters are infiltrated within the compound, not wide area energy supply and disposal, but self sufficient individual supply and disposal. A zero carbon environmental architecture foreseeing society of 2050 was completed.
A timber sash maker Kimado headquarter and factory, as one of bearer of environmental architecture, carried out new attempt of Zero Carbon Factory also architecturally speaking, and have expressed criticality as environmental architecture in following two concepts. 1.Architecture that constantly promote new attempts with brain stimulating work environment. 2.Eco-cycle energy saving architecture, that has environmental structure with high heat insulation, air-tightness and heat storage.
Project Data
Purpose: Factory and Office Floor space area: 3,299㎡ Stories: 3 stories Structure: Steel structure. 1.Architecture that constantly promote new attempts with brain stimulating work environment. i ) Section oriented layout plan that produces efficient production rate and reliability. Orienting to efficiency of production, layout was planned based on efficient flow.  Storage and glass factory placed at west side service entrance, 95m long line placed in the east-west axis factory wing at the north, joins at north-east with glass line that uses the courtyard and deep pent roof as its working and arranging space, and exit on the east. ii )Clean factory environment and sectional function that can constantly keep an eye. For the flow within the factory, by layouting posters, signboards and worktool booths, sections were clearly separated, and "spine space" was introduced so as to be able to make proposals such as checking of the product at each section, and improvements from the differences of each products. White space was created, floors, walls and ceilings all white, so as to make an environment where rubbish and dusts were easily recognizable, and made into a space so that it will lead to quality of products. 1 Factory 2  Storidge · Glass Factory 3  Office 4 Service Entrance 5 Courtyard 6 Car Park : Dust Collector : Dust Duct : Hot Water Panel 2.Eco-cycle energy saving architecture, that has environmental structure with high heat insulation, air-tightness and heat storage. i ) Australian made insulation sandwich panel, which achieved low initial, low running cost Insulation sandwich panel adopted for exterior walls and roof is a product that sandwiched Bead method Styrofoam with 0.4mm thick iron board,and was directly imported and processed in Australia,and also installation was managed. No scaffolding construction method strained nerves from slip from snow, furthermore since the time had overlapped with world-wide price raise of iron, and construction period had considerably delayed due to general strike, the cost increased, however, overall it was low cost, and also considering insulation ability, energy saving ability is very high. ii )Heat-cycle method which combines floor heat storage. In the concrete floor of factory wing, 300×500 trench was placed on right and left, and hot water panel was installed.  Including the pipes inside cross trench, heat was stored within floor construction, and heat would radiate mainly in perimeter zone. iii)Saw dust collector, used as biomass energy, stimulates the warm air flow. This air cycles around the room by dust collector which is placed in the center of factory wing. The saw dusts collected into dust collector are directly sent to boiler, however, other than winter time, briquettes are produced, and either reserved as fuel or sold.  Therefore, energy for this facility is recycling the saw dust waste produced from  production, and at the same time, has a characteristic of biomass energy which combines fuel production and sales. iv)Cool indoor environment during summer, created by sunlight control by deep pent roof, which combines a semi-exterior working space. During summer, sunlight is blocked by about 5m width deep pent roof between southern materials storage and glass factory wing, and office wing and factory wing.  It's high insulation ability makes it cool in the summer and warm in the winter.  It is ventilated by opening or closing of bottom and upper opening-closing window of each stripe-glasses. v ) Accomplishments in lowering initial cost and the running cost at the same time. For import of insulation panel and its installation cost, trial calculation of 8,000 yen level per square meter in the cost price was made. Insulation panel which is quite low cost material considering it can simultaneously have internal and external baking paint finish, with wooden sash pair glass, its high insulation,  air-tightness and heat storage, as well as basic environmental ability of the building of sun blocking structure, and with the biomass energy created by waste during the winter period, incredible energy saving of, the heating/cooling energy 30MJ/㎡(primary),55yen/㎡ annually, have been achieved.
Ecologically Designed Timber Frame Homes : The Sea Breeze Deck House, a home in Yokosuka City near the ocean, captures sunlight though south facing windows to warm an thermal mass earthen floor.  A zero carbon home is achieved through direct gain. (2006 TEPCO Environmental Architecture Competition Honorable Mention; 2004 Kanagawa Prefecture Architectural Competition Inspiration Award)
Project Data
Purpose: House Floor space area:77㎡ Stories: 2 stories Structure: Wooden structure. It is a house built in a hill facing Sagami Bay. The owner is a teacher of public school, and bought this compound facing Sagami Bay to start fresh the life after retirement.  Taking the 40 steps approach stairs easy, even proclaiming will strengthen physique with this stairs and tennis.  Basically residing alone but has a Japanese room for niece to come and play the piano or for the mother to stay. Wishing for a house where friends constantly visits,  and dreams of enjoying beer and the ocean view with now grown up pupils. From about the middle to back of the compound, sea cannot be viewed. Therefore, building was built towards front, and the back space was made into pomegranate  garden, and will be possible to extend for example into library in the future. The first floor is a functional earthen floor doma space, where everything can be done alone. Large table is placed at the center of doma, and both from wooden floor itanoma and doma, this table is centre of life.  East wall of doma is a large stainless kitchen, easy to use. Since the owner's wish is to lead a life growing vegetables etc outside, earthen floor doma is intermediate space of outside and inside. From the entrance, one enters directly into doma space. There are two living rooms at 1st and 2nd floors, both with wonderful view of the ocean. Especially the 2nd floor is called "Sea Breeze Deck", a space which presents the concept of this house, which has an atmosphere of internalized sailing deck. Both floors have large opening entirely with glass on south side, and especially the second floor opening, if you open south-west, becomes an exterior space like a deck without openings. Simple frame structure is covered with exterior insulation, also southern structure brase inside the glass, half of southern side is designed with bold diagonal line, all side openings are not divided and is light facade. Interior, is a simple wooden space with wooden structure, electrical wiring adopts insulator and emphasize the space. In doma space, bamboo blind heater is built in, and is made into a floor heating. This floor, in winter, stores solar heat with direct-gain, therefore, although it is all electricity housing with 24 hours bath, cost of heating is very low. (6,000 yen per months, results of February, 2004)