Heat transfer theoretical study of a single borehole system used to remove heat from the ground

8th International Conference on Advanced Concepts in Mechanical Engineering

Horbaniuc, B.^1 ; Dumencu, A.^1 ; Dumitracu, Gh^1

Automotive and Mechanical Engineering Department, Gheorghe Asachi Technical University of Iasi, Iasi, Romania^1

关键词: Atmospheric pollution;    Borehole heat exchangers;    Finite-difference techniques;    Operation period;    Radial propagation;    Single boreholes;    Theoretical modeling;    Theoretical study;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/444/8/082012/pdf
DOI  :  10.1088/1757-899X/444/8/082012

来源: IOP

【 摘 要 】

Borehole heat exchangers are used to extract heat from the ground in ground-source heat pump applications. Thus, atmospheric pollution with greenhouse gases is reduced by reducing the fuel consumption for residential or social buildings heating. Heat removal by means of the borehole results in a radial propagation of the perturbation (ground cooling). The magnitude of this perturbation and the removed heat are important parameters of the process that must be evaluated. The theoretical model presented in the paper uses the decomposition finite difference technique to determine the temperature distribution in the ground at different moments (1, 3, and 6 months). Although the model is two-dimension, at this stage a one-dimension heat diffusion is considered in order to determine the penetration depth of the perturbation during the operation period which has been set to 6 months per year.