Impact of Design Parameters on Length and Application Effect of Surface Water Heat Exchanger(SWHE)

Title & Authors
Impact of Design Parameters on Length and Application Effect of Surface Water Heat Exchanger(SWHE)
Sohn, Byonghu; Min, Kyong-Chon;

Abstract
Commercial buildings are generally cooling-dominated and therefore reject more heat to a vertical ground heat exchanger(GHE) than they extract over the annual cycle. Shallow ponds can provide a cost-effective means to balance the thermal loads to the ground and to reduce the length of GHE. The objective of this work has been to develop a design tool for surface water heat exchanger(SWHE) submerged in shallow pond. This paper presents the analysis results of the impact of design parameters on the length of SWHE and its application effect on geothermal heat pump(GHP) system using vertical GHE. In order to analysis, We applied $\small{{\epsilon}-NTU}$ method on designing the length of SWHE. Analysis results show that the required pipe length of SWHE was decreased with the increase of approach temperature difference and with the decrease of pipe wall thickness. In addition, when the SWHE was applied to the GHP system, the temperature of vertical GHE was more stable than that of standalone GHE system.
Keywords
Geothermal Heat Pump;Surface Water Heat Exchanger;Shallow Pond;Design Length;Application Effect;
Language
Korean
Cited by
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