Results 221 to 230 of about 290,321 (263)

Numerical evaluation of thermal response tests

Geothermics, 2007
Abstract Thermal conductivity is a key parameter in the design of borehole heat exchangers. Thermal response tests are becoming increasingly more popular for measuring in situ thermal conductivity but no theoretical investigations have been done so far that account for three-dimensional effects.
Signorelli, Sarah, Bassetti, Simone, Pahud, Daniel, Kohl, Thomas   +3 more
openaire   +2 more sources

Stratified thermal response test measurement and analysis

Energy and Buildings, 2020
Abstract An improved thermal response test method called the stratified thermal response test (STRT) was proposed and a corresponding system was developed in this study. The difference between the STRT and other methods is that the temperature was measured by sensors placed inside the borehole heat exchangers (BHEs) at different depths to obtain the ...
Peng Zhao, Xiaozhao Li, Ye Zhang, Kai Liu, Minghao Lu   +4 more
openaire   +1 more source

Prediction of ground thermal diffusivity from thermal response tests

Energy and Buildings, 2019
Abstract Ground-coupled heat pump (GCHP) systems are being increasingly utilized in recent years. There are several important parameters in the design of GCHP systems. As ground thermal conductivity is one of the most crucial parameters, it should be measured by conducting in-situ thermal response tests (TRTs).
Seok Yoon, Min-Jun Kim
openaire   +1 more source

A Review of Thermal Response Test Analysis Using Pumping Test Concepts

Groundwater, 2011
The design of ground‐coupled heat pump systems requires knowledge of the thermal properties of the subsurface and boreholes. These properties can be measured with in situ thermal response tests (TRT), where a heat transfer fluid flowing in a ground heat exchanger is heated with an electric element and the resulting temperature perturbation is monitored.
Raymond, Jasmin, Therrien, René, Gosselin, Louis, Lefebvre, René   +3 more
openaire   +3 more sources

Numerical sensitivity study of thermal response tests

Renewable Energy, 2012
Abstract Thermal conductivity and thermal borehole resistance are basic parameters for the technical and sustainable design of closed ground source heat pump (GSHP) systems. One of the most common methods to determine these parameters is the thermal response test (TRT).
Wagner, V., Bayer, P., Kübert, M., Blum, P.   +3 more
openaire   +3 more sources

Error analysis of thermal response tests

Applied Energy, 2013
Abstract The ground thermal conductivity and borehole thermal resistance are essential parameters for the design of a ground source heat pump system. As it is hardly possible to obtain sufficiently accurate values of these parameters from geological or soil-profile information, thermal response tests have been developed that provide measurements in ...
openaire   +1 more source

Borehole temperature evolution during thermal response tests

Geothermics, 2011
The measurement of temperature inside a borehole at specified depths during a thermal response test, used to infer the subsurface and the borehole thermal properties for the design of a ground-coupled heat pump system, allows the correlation of the subsurface thermal conductivity with stratigraphy. The temperature signal measured in the borehole during
J. Raymond, R. Therrien, L. Gosselin
openaire   +1 more source

Actively heated fiber optics based thermal response test

2021
<p>In the pursuit of sustainable development and the mitigation of climate change, shallow geothermal energy has been widely recognized as a type of clean energy with great potential. Accurate estimation of thermal ground properties is needed to optimally apply shallow geothermal energy technologies, which are of growing importance for ...
Kai Gu, Bo Zhang, Bin Shi, Chun Liu, Peter Bayer, Zhuang Wei   +5 more
openaire   +1 more source

Oscillatory thermal response tests to estimate the ground thermal diffusivity

Applied Energy
Thermal Response Tests (TRT) have been extensively studied in the past decades and is an important area of research belonging to ground heat exchanger design. The most important thermal property inferred in a TRT is the equivalent subsurface thermal conductivity.
Lamarche, Louis, Raymond, Jasmin, Giordano, Nicolò   +2 more
openaire   +2 more sources