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An Analytical Model for Analyzing Transient Heat Transfer around Geothermal Piles with Time-Dependent Heat Flux
Analytical models available in the literature that predict transient heat flow in soils around ground source heat pump systems (GSHPs) mostly simplify the condition and consider constant heating rate. However, in practical application, inlet fluid temperature (thermal loading) changes with time, and therefore, heat flux along the depth varies over time. Therefore, in this study, we developed an analytical model based on a solid cylindrical source model for analyzing transient heat flow in soils surrounding an energy pile by considering a time-dependent heat flux. Heat conduction equation is solved in two-dimensional axisymmetric condition. A time-dependent heat source term can enhance the previous analytical solution (e.g., a solid cylindrical model) for practical applications. In order to solve the heat transfer equation, Green’s function and imaging methods are utilized. Results indicate that soil thermal response close to an energy pile significantly changes while considering a temporal variation of the heating rate.
An Analytical Model for Analyzing Transient Heat Transfer around Geothermal Piles with Time-Dependent Heat Flux
Analytical models available in the literature that predict transient heat flow in soils around ground source heat pump systems (GSHPs) mostly simplify the condition and consider constant heating rate. However, in practical application, inlet fluid temperature (thermal loading) changes with time, and therefore, heat flux along the depth varies over time. Therefore, in this study, we developed an analytical model based on a solid cylindrical source model for analyzing transient heat flow in soils surrounding an energy pile by considering a time-dependent heat flux. Heat conduction equation is solved in two-dimensional axisymmetric condition. A time-dependent heat source term can enhance the previous analytical solution (e.g., a solid cylindrical model) for practical applications. In order to solve the heat transfer equation, Green’s function and imaging methods are utilized. Results indicate that soil thermal response close to an energy pile significantly changes while considering a temporal variation of the heating rate.
An Analytical Model for Analyzing Transient Heat Transfer around Geothermal Piles with Time-Dependent Heat Flux
Yazdani Cherati, Davood (author) / Ghasemi-Fare, Omid (author)
International Foundations Congress and Equipment Expo 2021 ; 2021 ; Dallas, Texas
IFCEE 2021 ; 547-556
2021-05-06
Conference paper
Electronic Resource
English
| British Library Conference Proceedings | 2021
A practical heat transfer model for geothermal piles
| Online Contents | 2013
A practical heat transfer model for geothermal piles
| Elsevier | 2013