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Hisashi Saitoh
Hokkaido University
Air conditioningHeat exchangerEngineeringHeat pumpWaste management
6Publications
3H-index
284Citations
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Publications 6
Newest
#1Yasuhiro Hamada (Hokkaido University)H-Index: 22
#2Hisashi Saitoh (Hokkaido University)H-Index: 3
Last. Kiyoshi Ochifuji (Hokkaido University)H-Index: 11
view all 5 authors...
Abstract This paper describes the field performance of air conditioning with an energy pile system, which was applied to the pile foundations of an actual building for the purpose of reducing the cost of the underground heat exchanger. First, the building for both office and residential use, for which a space heating and cooling system using friction piles was installed, was built in Sapporo in December 2000. Second, three tests were carried out to specify the design of a heat exchanger inside t...
173 CitationsSource
#1Yasuhiro Hamada (Hokkaido University)H-Index: 22
#2Makoto Nakamura (Hokkaido University)H-Index: 12
Last. Kiyoshi Ochifuji (Hokkaido University)H-Index: 11
view all 5 authors...
This paper describes experiments and analyses on an improved underground heat exchanger by using a no-dig method for the purpose of the cost reduction of a space heating and cooling system using underground thermal energy. First, the improved underground heat exchanger was installed on the campus of Hokkaido University, and it was shown that a ground source heat pump system utilizing the heat exchanger was sufficient for space heating and cooling. Second, evaluation program of the heat exchanger...
16 CitationsSource
#1Hisashi Saitoh (Hokkaido University)H-Index: 3
#2Yasuhiro Hamada (Hokkaido University)H-Index: 22
Last. Katsunori Nagano (Hokkaido University)H-Index: 20
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Abstract This paper describes the effectiveness of a hybrid solar collector that generates both electric power and heat. Experiments and analyses were conducted on power and heat generation characteristics of the hybrid solar collector. First, experiments under constant supply temperature of brine were made and it was found that conversion efficiency ranged from 10% to 13%, and that collector efficiencies at 20 and 40 °C brine temperature were from 40% to 50% and approximately 20%, respectively....
82 CitationsSource
#1Yasuhiro HamadaH-Index: 22
#2Makoto NakamuraH-Index: 27
Last. Kiyoshi OchifujiH-Index: 11
view all 7 authors...
This paper describes field experiments and evaluation on a snow melting system by using underground thermal energy in order to verify its energy saving performance. Firstly, experiments on a snow melting tank with a vertical earth heat exchanger which is 30m in depth were made and it was found that the heat extraction rate from the underground reached approximately 1.4kW. Secondly, an evaluation program on the snow melting system was developed, and the program was verified to give good predictio...
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