A successive flux estimation method for rapid g-function construction of small to large-scale ground heat exchanger

2021 ◽  
Vol 165 ◽  
pp. 359-368
Author(s):  
A. Nguyen ◽  
P. Pasquier
Keyword(s):  
Heat Exchanger ◽  
Large Scale ◽  
Estimation Method ◽  
Ground Heat Exchanger ◽  
Flux Estimation ◽  
Function Construction

Method for Determining Deep Ground Thermal Properties Based on Solid Cylindrical heat Source Model

2011 ◽  
Vol 99-100 ◽  
pp. 881-884
Author(s):  
Ming Zhi Yu ◽  
Xiao Fei Yu ◽  
Lei Zhang ◽  
Zhao Hong Fang
Keyword(s):  
Thermal Properties ◽  
Heat Exchanger ◽  
Heat Source ◽  
Engineering Design ◽  
Estimation Method ◽  
Source Model ◽  
Parameters Estimation ◽  
Ground Heat Exchanger ◽  
Heat Source Model ◽  
One Dimensional

A method is proposed to determine deep ground thermal properties at worksites using one-dimensional ground heat exchanger solid cylindrical heat source model together with parameters estimation method. The ground thermal properties of an actual project were measured and analyzed by this method, and the results show that this method can get credible ground thermal properties, which can be used for engineering design.

The Coupled Heat Conduction & Advection Model for Ground Heat Exchanger and its Application for Utilizable Resource Amount Calculation in Soil

2012 ◽  
Vol 594-597 ◽  
pp. 2201-2209
Author(s):  
Rui Fan ◽  
Yan Gao ◽  
Wei Ding Long
Keyword(s):  
Heat Conduction ◽  
Heat Exchanger ◽  
Estimation Method ◽  
Assessment Method ◽  
Ground Heat Exchanger ◽  
Large Area ◽  
Efficient Operation ◽  
High Efficient ◽  
Estimate Method ◽  
Standard Calculation

Following the wide application of ground source heat pump (GSHP) system, especially for large area ground heat exchanger (GHE), it is really necessary to have a standard calculation or assessment method to estimate the utilizable resource amount in soil around GHE. As for the GHE area, the soil works as a thermal storage actually which means it is heat gain in summer to meet the heat demands in the coming winter, and the cool energy gain in winter to be used for next summer air-conditioning. So it is really necessary to know the utilizable resource amount for better design of GSHP system and then the highly efficient operation of the system too. Hereby, a coupled heat conduction and heat advection model is introduced to simulate the performance of ground heat exchanger. Thus we can see the importance of utilizable resource amount estimation method. The reasonable resource amount estimate method is good for the scientific design, normal utilization, and high-efficient operation of GSHP system.

A large scale heat exchanger with polygonally configurated heat pipeunits

1978 ◽  
Author(s):  
T. KOIZUMI ◽  
S. FURUYA ◽  
K. MATSUMOTO ◽  
K. KARAWAWA
Keyword(s):  
Heat Exchanger ◽  
Large Scale

scholarly journals Analysis of Heat Exchange Rate for Low-Depth Modular Ground Heat Exchanger through Real-Scale Experiment

Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1893
Author(s):  
Kwonye Kim ◽  
Jaemin Kim ◽  
Yujin Nam ◽  
Euyjoon Lee ◽  
Eunchul Kang ◽  
...  
Keyword(s):  
Exchange Rate ◽  
Heat Exchanger ◽  
Heat Exchange ◽  
Heat Pump ◽  
Heat Extraction ◽  
Ground Heat Exchanger ◽  
Pump System ◽  
Heat Pump System ◽  
Scale Experiment ◽  
Real Scale

A ground source heat pump system is a high-performance technology used for maintaining a stable underground temperature all year-round. However, the high costs for installation, such as for boring and drilling, is a drawback that prevents the system to be rapidly introduced into the market. This study proposes a modular ground heat exchanger (GHX) that can compensate for the disadvantages (such as high-boring/drilling costs) of the conventional vertical GHX. Through a real-scale experiment, a modular GHX was manufactured and buried at a depth of 4 m below ground level; the heat exchange rate and the change in underground temperatures during the GHX operation were tracked and calculated. The average heat exchanges rate was 78.98 W/m and 88.83 W/m during heating and cooling periods, respectively; the underground temperature decreased by 1.2 °C during heat extraction and increased by 4.4 °C during heat emission, with the heat pump (HP) working. The study showed that the modular GHX is a cost-effective alternative to the vertical GHX; further research is needed for application to actual small buildings.

Parametric analysis, response surface, sensitivity analysis, and optimization of a novel spiral-double ground heat exchanger

2021 ◽  
Vol 240 ◽  
pp. 114251
Author(s):  
Ahmed A. Serageldin ◽  
Ali Radwan ◽  
Takao Katsura ◽  
Yoshitaka Sakata ◽  
Shigeyuki Nagasaka ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Heat Exchanger ◽  
Response Surface ◽  
Parametric Analysis ◽  
Ground Heat Exchanger ◽  
Surface Sensitivity
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