TY - JOUR
N2 - The main task of mathematical modelling of thermal and flow processes in vertical ground heat exchanger (BHE-Borehole Heat Exchanger) is to determine the unit of borehole depth heat flux obtainable or transferred during the operation of the installation. This assignment is indirectly associated with finding the circulating fluid temperature flowing out from the U-tube at a given inlet temperature of fluid in respect to other operational parameters of the installation. The paper presents a model of thermal and flow processes in BHE consisting of two analytical models separately-handling processes occurring inside and outside of borehole. A quasi-three-dimensional model formulated by Zeng was used for modelling processes taking place inside the borehole and allowing to determine the temperature of the fluid in the U-tube along the axis of BHE. For modelling processes occurring outside the borehole a model that uses the theory of linear heat source was selected. The coupling parameters for the models are the temperature of the sealing material on the outer wall of the borehole and the average heat flow rate in BHE. Experimental verification of the proposed model was shown in relation to BHE cooperating with a heat pump in real conditions.
L1 - http://journals.pan.pl/Content/105895/PDF/03-paper-Pater-Ciesielczyk.pdf
L2 - http://journals.pan.pl/Content/105895
PY - 2017
IS - No 4
EP - 533
DO - 10.1515/cpe-2017-0041
KW - vertical ground heat exchanger
KW - borehole
KW - geothermal heat pumps
KW - thermal and flow processes
A1 - Pater, Sebastian
A1 - Ciesielczyk, Włodzimierz
PB - Polish Academy of Sciences Committee of Chemical and Process Engineering
VL - vol. 38
DA - 2017.12.15
T1 - Mathematical modelling of thermal and flow processes in vertical ground heat exchangers
SP - 523
UR - http://journals.pan.pl/dlibra/publication/edition/105895
T2 - Chemical and Process Engineering
ER -