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Simplified heat transfer analysis method for large-scale boreholes ground heat exchangers
- Source :
- Energy and Buildings. 116:593-601
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- A simplified heat transfer method to analyze the thermal performance of large-scale boreholes ground heat exchangers (GHE) has been proposed considering the geometric symmetry of borehole layout. Taking the ground heat exchanger with matrix layout of vertical boreholes as the example, the ground temperature distribution is analyzed under the conditions of no groundwater advection by the proposed simplified method. Based on the simulation results, a representative boreholes matrix can be proposed to replace the original large-scale ground heat exchanger for heat transfer analysis. Meanwhile, the results show that the representative boreholes matrix can be determined by the thermal influence radius of a single borehole by assuming all the boreholes have the same thermal loads and also in the same geological conditions, geometry parameters and operating conditions. It is indicated that the thermal influence radius of a single borehole can be obtained according to the allowed error range of the ground temperature responses, which can correspondingly determine the number of the representative boreholes matrix.
- Subjects :
- Physics::General Physics
Advection
020209 energy
Mechanical Engineering
Borehole
02 engineering and technology
Building and Construction
Radius
Mechanics
Physics::Classical Physics
Physics::Geophysics
Matrix (geology)
020401 chemical engineering
Heat transfer
Heat exchanger
Thermal
0202 electrical engineering, electronic engineering, information engineering
Geotechnical engineering
0204 chemical engineering
Electrical and Electronic Engineering
Groundwater
Geology
Civil and Structural Engineering
Subjects
Details
- ISSN :
- 03787788
- Volume :
- 116
- Database :
- OpenAIRE
- Journal :
- Energy and Buildings
- Accession number :
- edsair.doi...........c2d18ef56db2f9037da4b3483639fe12