Results 31 to 40 of about 314,980 (299)

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

How Reliable Are Standard Thermal Response Tests? An Assessment Based on Long-Term Thermal Response Tests Under Different Operational Conditions

Energies, 2018
In this contribution, we analyze the results of a number of thermal response test (TRT) experiments performed during several years at the same location at our university campus in Valencia (Spain), a permeable saturated soil area with possible ...
Javier F. Urchueguía, Lenin-Guillermo Lemus-Zúñiga, Jose-Vicente Oliver-Villanueva, Borja Badenes, Miguel A. Mateo Pla, José Manuel Cuevas   +5 more
doaj   +1 more source

Thermal response of Sanabria lake to global change (NW Spain) [PDF]

, 2020
Are large water bodies able to act as sensors of global change? As accumulators of water and heat, some of their thermal characteristics might be altered by long term (decadal) hydrometeorological changes and thus may be used as indicators of the effects
Vega, José, Palau, Antoni, Dolz, Jose, Ramos Fuertes, Anaïs, Casasola García, Antonio, Casasola, Antonio, Rodríguez-Martín, Alejandro, Armengol Bachero, Joan, Dolz Ripollès, Josep, Palau Ibars, Antoni, Armengol, Joan, Ramos, Anaïs, Vega Ureta, José Carlos, Rodríguez Palao, Alejandro   +13 more
core   +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

Critical Review on Efficiency of Ground Heat Exchangers in Heat Pump Systems

Clean Technologies, 2020
Use of ground source heat pumps has increased significantly in recent years for space heating and cooling of residential houses and commercial buildings, in both heating (i.e., cold region) and cooling (i.e., warm region) dominated climates, due to its ...
Adel Eswiasi, Phalguni Mukhopadhyaya
doaj   +1 more source

Short-time thermal response test based on a 3-D numerical model [PDF]

, 2012
To assist the design of ground heat exchangers the thermal response test method is usually performed. In its traditional version the thermal response test data are compared with the line source model solution to restore the soil thermal conductivity and ...
PAGLIARINI, Giorgio, S. Rainieri, G. Pagliarini, BOZZOLI, Fabio, RAINIERI, Sara, L. Schiavi, F. Bozzoli   +6 more
core   +1 more source

Analysis of Relaxation Time of Temperature in Thermal Response Test for Design of Borehole Size

Energies, 2020
A new practical method for thermal response test (TRT) is proposed herein to estimate the groundwater velocity and effective thermal conductivity of geological zones.
Hobyung Chae, Katsunori Nagano, Yoshitaka Sakata, Takao Katsura, Ahmed A. Serageldin, Takeshi Kondo   +5 more
doaj   +1 more source

Estimation of the vertical borehole thermal parameters based on the evolution algorithm using temperature response functions [PDF]

Estonian Journal of Earth Sciences, 2019
The vertical borehole ground heat exchange performance is still the issue for the engineers installing vertical borehole ground plants using ground-coupled heat pumps.
Audrius Indriulionis, Petras Šinkūnas, Robert Mokrik   +2 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

Effective Thermal Conductivity and Borehole Thermal Resistance in Selected Borehole Heat Exchangers for the Same Geology

Energies, 2022
Investigating the constructions of borehole heat exchangers with high efficiency (unit heat transfer between the heat carrier and ground) is important. One of the means to improve efficiency is the use of the most efficient construction of the borehole ...
Tomasz Sliwa, Patryk Leśniak, Aneta Sapińska-Śliwa, Marc A. Rosen   +3 more
doaj   +1 more source