Heat exchange performance of ground source heat pump system that use direct expansion method

2020 ◽  
Vol 2020 (0) ◽  
pp. 17F18
Author(s):  
Daichi SAMPEI ◽  
Tetsuaki TAKEDA
Keyword(s):  
Heat Exchange ◽  
Heat Pump ◽  
Expansion Method ◽  
Ground Source Heat Pump ◽  
Direct Expansion ◽  
Pump System ◽  
Heat Pump System ◽  
Exchange Performance ◽  
Ground Source

10807 Demonstration experiment of ground source heat pump system using direct expansion method : Result of heating experiment

2014 ◽  
Vol 2014.20 (0) ◽  
pp. _10807-1_-_10807-2_
Author(s):  
Daiki Yokoyama ◽  
Tetsuaki Takeda ◽  
Shumpei Funatani ◽  
Koichi Ichimiya ◽  
Syuhei Ishiguro
Keyword(s):  
Heat Pump ◽  
Expansion Method ◽  
Ground Source Heat Pump ◽  
Direct Expansion ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source ◽  
Demonstration Experiment

10204 Study on Heat Exchanging Performance of Ground Source Heat Pump Using Direct Expansion Method : Heat Exchange Performance Obtained on Indoor Unit Side

2015 ◽  
Vol 2015.21 (0) ◽  
pp. _10204-1_-_10204-2_
Author(s):  
Daisuke Tanaka ◽  
Daiki Yokoyama ◽  
Tetsuaki Takeda ◽  
Shumpei Funatani ◽  
Koichi Ichimiya ◽  
...  
Keyword(s):  
Heat Exchange ◽  
Heat Pump ◽  
Expansion Method ◽  
Ground Source Heat Pump ◽  
Direct Expansion ◽  
Exchange Performance ◽  
Ground Source

F141 Demonstration experiment of ground source heat pump system using direct expansion method

2013 ◽  
Vol 2013 (0) ◽  
pp. 189-190
Author(s):  
Tetsuaki Takeda ◽  
Daiki Yokoyama ◽  
Syuhei Ishiguro ◽  
Koichi Ichimiya ◽  
Shumpei Funatani
Keyword(s):  
Heat Pump ◽  
Expansion Method ◽  
Ground Source Heat Pump ◽  
Direct Expansion ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source ◽  
Demonstration Experiment

scholarly journals Evaluation of Suitable Areas to Introduce a Closed-Loop Ground Source Heat Pump System in the Case of a Standard Japanese Detached Residence

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4294
Author(s):  
Gaurav Shrestha ◽  
Mayumi Yoshioka ◽  
Hikari Fujii ◽  
Youhei Uchida
Keyword(s):  
Heat Exchange ◽  
Heat Pump ◽  
Closed Loop ◽  
Ground Source Heat Pump ◽  
Standard Size ◽  
Pump System ◽  
Heat Pump System ◽  
The North ◽  
Ground Source ◽  
Suitability Map

Evaluation of appropriate areas to introduce a closed-loop ground-source heat pump (GSHP) system in the case of a standard detached residence was conducted in Akita Plain, Japan. Depth of borehole heat exchanger (BHE) required to use a GSHP system was taken as the suitability index, which is simpler for the general public to understand and to promote the system. Heating and cooling loads of the standard size detached residence were calculated based on the 2013 Energy Conservation Standard. To estimate BHE depths and estimate a suitable area, identical 3D BHE models were constructed at 30 points in the plain. Required BHE depths were determined by performing heat exchange simulations at each location using the calculated loads and heat exchange rates. A suitability map showing distribution of the required BHE depths was prepared. BHE depths were shorter in the north-western area compared to the other parts, implying that the coastal lowlands in this area are more suitable for closed-loop system in the standard detached residences in terms of heat exchange performance as well as the cost reduction. Thickly distributed Quaternary System with higher thermal conductivity is contributing to shorter BHE depths. The suitability map is effective to adopt potential areas for the system installation in the standard detached Japanese residences.

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