Title :
Model establishment and simulation for finite length cylindrical surface heat and moisture transfer outside the borehole
Author :
Zhang, Yating ; Jiang, Dawei ; Zhang, Ye
Author_Institution :
Sch. of Electron. Inf. & Control Eng., Beijing Univ. of Technol., Beijing, China
Abstract :
Basing on the cylindrical heat transfer model of vertical ground source heat exchanger, and according to the mass conservation and energy conservation theorem, established a finite length cylindrical heat and moisture transfer model for soil layer around the borehole. Simulated the non-steady-state heat and moisture transfer of soil layers around the heat exchanger under summer operating conditions by using COMSOL multi-physics coupling analysis software, and analyzed the influence of different soil thermal properties and initial moisture contents in temperature field and moisture field of soil layers exerted by the heat and moisture transfer.
Keywords :
energy conservation; heat exchangers; heat transfer; moisture; soil; terrestrial heat; COMSOL multiphysics coupling analysis software; borehole; energy conservation theorem; finite length cylindrical heat transfer model; initial moisture content; mass conservation; moisture field; moisture transfer model; nonsteady-state heat transfer; soil layer; soil thermal properties; summer operating conditions; temperature field; vertical ground source heat exchanger; Couplings; Educational institutions; Heat engines; Heat transfer; Intelligent control; Moisture; Soil; Coupling Analysis; Cylindrical Surface; Ground Source Heat Exchanger; Heat Transfer Model; Heat and Moisture Migration; Non Steady Heat Transfer;
Conference_Titel :
Intelligent Control and Automation (WCICA), 2012 10th World Congress on
Conference_Location :
Beijing
Print_ISBN :
978-1-4673-1397-1
DOI :
10.1109/WCICA.2012.6358432
