Results 11 to 20 of about 290,321 (263)

Study on Calculation Method of Heat Exchange Capacity and Thermal Properties of Buried Pipes in the Fractured Rock Mass-Taking a Project in Carbonate Rock Area as an Example

Energies, 2023
Fractures are developed in carbonate rock areas, and the fracture water flow significantly influences the heat exchange between buried pipes and the rock mass by induing heat convection, providing the carbonate rock area a strong heat exchange capacity ...
Lin Wang, Yonglin Ren, Fengqiang Deng, Yiqiang Zhang, Yan Qiu   +4 more
doaj   +1 more source

One-Year Monitoring of a Ground Heat Exchanger Using the In Situ Thermal Response Test: An Experimental Approach on Climatic Effects

Energies, 2022
The use of renewable energies, and of geothermal energy in particular, is increasingly being applied in Germany and Europe for the development of new residential districts.
Oliver Suft, David Bertermann
doaj   +1 more source

Clearing a Path for Ground Heat Exchange Systems: A Review on Thermal Response Test (TRT) Methods and a Geotechnical Routine Test for Estimating Soil Thermal Properties

Energies, 2020
The performance of ground heat exchanger systems depends on the knowledge of the thermal parameters of the ground, such as thermal conductivity, capacity, and diffusivity.
Alessandro Franco, Paolo Conti
doaj   +1 more source

Comprehensive application of hydrogeological survey and in-situ thermal response test

Case Studies in Thermal Engineering, 2021
Thermal properties of rock-soil are of great importance for the design of borehole heat exchangers (BHEs). In the process of testing thermal properties of rock-soil through an in-situ thermal response test (TRT), groundwater seepage directly affects the ...
Wei Song, Ziteng Li, Yue Jin, Bo Zhang, Tuanfeng Zheng   +4 more
doaj   +1 more source

A Case Study of Field Thermal Response Test and Laboratory Test Based on Distributed Optical Fiber Temperature Sensor

Energies, 2022
To design an efficient ground source heat pump (GSHP) system, it is important to accurately measure the thermophysical parameters of the geotechnical layer.
Yongjie Ma, Yanjun Zhang, Yuxiang Cheng, Yu Zhang, Xuefeng Gao, Kun Shan   +5 more
doaj   +1 more source

Interpretation of rock mass thermal conductivity at the design stage of heat pump installation and its impact on system efficiency (COP)

E3S Web of Conferences, 2018
The recognition of geological and thermal conditions of the rock mass in the case of designing a vertical borehole heat exchanger as the ground source for heat pump installations is a key issue affecting the efficiency of the heating/cooling system ...
Kaczmarczyk Michał, Kaczmarczyk Magda, Thürmer Konrad, Klich Magdalena   +3 more
doaj   +1 more source

Field Analysis of Stepwise Effective Thermal Conductivity along a Borehole Heat Exchanger under Artificial Conditions of Groundwater Flow

Hydrology, 2017
Heat advection caused by groundwater flow can potentially improve the performance of a borehole heat exchanger. However, the required flow velocity is not achieved under most natural conditions. This study focuses on artificial groundwater flow generated
Yoshitaka Sakata, Takao Katsura, Katsunori Nagano, Manabu Ishizuka   +3 more
doaj   +1 more source

Heat Transfer Performance in Energy Piles in Urban Areas: Case Studies for Lambeth College and Shell Centre UK

Applied Sciences, 2020
A ground source heat pump system is a highly efficient renewable heating, cooling, and ventilation system that utilizes the ground as a heat source or sink via ground heat exchangers.
He Qi, Yu Zhou, Zhonghua Zhang, Bo Wang, Yi Zhang, Hongzhi Cui, Xi Wang   +6 more
doaj   +1 more source

Comparison of Four Methods for Borehole Heat Exchanger Sizing Subject to Thermal Response Test Parameter Estimation

Energies, 2019
The impact of different parameter estimation results on the design length of a borehole heat exchanger has received very little attention. This paper provides an in-depth investigation of this problem, together with a full presentation of six data ...
Xuedan Zhang, Tiantian Zhang, Bingxi Li, Yiqiang Jiang   +3 more
doaj   +1 more source

Comparative Analysis of Geothermal Energy in Korea Based on Closed Borehole and Single- and Two-Well Standing Column Well Geothermal Heat Exchange Systems

Applied Sciences, 2020
In this study, a mobile measuring device was developed and a thermal response test that applied a standing column well-type heat exchanger was conducted to obtain design parameters from field measurements.
Jangyoul You, Changhee Lee
doaj   +1 more source