Effect of environmental thermal disturbance on effective thermal conductivity of ground source heat pump system

2021 ◽  
Vol 237 ◽  
pp. 114149
Author(s):  
Kun Zhou ◽  
Jinfeng Mao ◽  
Yong Li ◽  
Hua Zhang ◽  
Chaofeng Li ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Effective Thermal Conductivity ◽  
Heat Pump ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source ◽  
Thermal Disturbance

A Study on the Calculation Model of Rock Soil Thermal Conductivity in the Design of the Ground Source Heat Pump System

2014 ◽  
Vol 889-890 ◽  
pp. 1347-1352
Author(s):  
Hong Wen Jin ◽  
Qing Shen Fang
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Heat Pump ◽  
Soil Layer ◽  
Heat Extraction ◽  
Ground Source Heat Pump ◽  
Soil Thermal Conductivity ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source

The rock soil thermal conductivity is the most important design parameter for the ground source heat pump system. Based on the equation applied for the heat transfer between the geothermal heat exchanger and its surrounding rock soil, a quasi-three dimensional heat conduction model showing the heat transfer inside the borehole of the U-tube was established to determine the thermal conductivity of the deep-layer rock soil. The results obtained show that the average thermal conductivity got through calculation and actual determination in a tube-embedding region of the ground source heat pump engineering were 1.895 and 1.955W/(m·°C), respectively. The soil layer, which has a great thermal conductivity and a strong integrated heat transfer capability, is suitable for the use of the ground source heat pump system with the tubes embedded underground. The soil layer, with a body temperature of 19 °C and a higher initial temperature, is suitable for the heat extraction from underground in winter. The deviation between the calculation and the determination of the average thermal conductivity in the abovementioned region was 0.06, which could meet the required precision, indicating that the results from the calculation could be used for design.

scholarly journals Analysis of Shallow Subsurface Geological Structures and Ground Effective Thermal Conductivity for the Evaluation of Ground-Source Heat Pump System Installation in the Aizu Basin, Northeast Japan

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 2098 ◽  
Author(s):  
Takeshi Ishihara ◽  
Gaurav Shrestha ◽  
Shohei Kaneko ◽  
Youhei Uchida
Keyword(s):  
Thermal Conductivity ◽  
Effective Thermal Conductivity ◽  
Heat Pump ◽  
Geological Structure ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Southern Basin ◽  
Shallow Subsurface ◽  
Ground Source ◽  
Basin Scale

Shallow subsurface geological structure mapping combined with ground effective thermal conductivity values at the basin scale provide an appropriate method to evaluate the installation potential of ground-source heat pump systems. This study analyzed the geological structure of the Aizu Basin (Northeast Japan) using sedimentary cores and boring log and mapped the distribution of average ground effective thermal conductivity in the range from −10 m to −100 m depth calculated from cores and logs. Gravel layers dominate in alluvial fans of the northern and southern basin areas, which are found to be associated with higher average ground effective thermal conductivity values, 1.3–1.4 W/m/K, while central and western floodplain areas show lower values of 1.0–1.3 W/m/K due to the existence of thick mud layers in the shallow subsurface. The results indicate that the conventional closed-loop systems are more feasible in northern and southern basin areas than in the central and western areas. Evaluation for the installation potential of the ground-source heat pump systems using depth-based distribution maps of average ground effective thermal conductivity is the originality of this study. This approach is valuable and proper for the simple assessment of the system installation in different sedimentary plains and basins in Japan and other countries.

scholarly journals Design and Experimental Testing of a Ground Source Heat Pump System Based on Energy-Saving Solar Collector

2016 ◽  
Vol 142 (3) ◽  
pp. 04015022 ◽  
Author(s):  
Zhitao Zheng ◽  
Ying Xu ◽  
Jianghui Dong ◽  
Linfang Zhang ◽  
Liping Wang
Keyword(s):  
Energy Saving ◽  
Heat Pump ◽  
Solar Collector ◽  
Experimental Testing ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source

Performance analysis of photovoltaic-thermal road assisted ground source heat pump system during non-heating season

Solar Energy ◽  
2021 ◽  
Vol 221 ◽  
pp. 10-29
Author(s):  
Bo Xiang ◽  
Yasheng Ji ◽  
Yanping Yuan ◽  
Chao Zeng ◽  
Xiaoling Cao ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Heat Pump ◽  
Ground Source Heat Pump ◽  
Heating Season ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source

10-year simulation of photovoltaic-thermal road assisted ground source heat pump system for accommodation building heating in expressway service area

Solar Energy ◽  
2021 ◽  
Vol 215 ◽  
pp. 459-472
Author(s):  
Bo Xiang ◽  
Yasheng Ji ◽  
Yanping Yuan ◽  
Dan Wu ◽  
Chao Zeng ◽  
...  
Keyword(s):  
Heat Pump ◽  
Service Area ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source
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