Journal
APPLIED THERMAL ENGINEERING
Volume 61, Issue 2, Pages 55-64Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2013.07.022
Keywords
Ground source heat pump system; Horizontal connecting pipe; Pipe burial depth; Heat carrier fluid; Pipe insulation; Energy loss
Funding
- Bayerisches Staatsministerium fur Umwelt und Gesundheit
- Bayerische Forschungsstiftung
- Ochs Company (Nuremberg, Germany)
Ask authors/readers for more resources
In a vertical ground source heat pump (GSHP) system, horizontal pipe is the connection between borehole heat exchanger (BHE) and building. In current estimation of system performance, the energy loss of fluid circulating through a horizontal connecting pipe is often ignored. However, such energy loss can seriously reduce the thermal efficiency of GSHP systems in cold regions. This paper investigates the impacts of pipe burial depth and pipe insulation on energy loss of horizontal connecting pipes of a GSHP system in Nuremberg, Germany. The fluid circulation in a horizontal connecting pipe is investigated via experimental measurement and numerical simulation. Both the on-site data and numerical results suggest that the fluid temperature is substantially influenced by pipe burial depth as well as insulation. The numerical modeling shows that the daily energy loss can vary in magnitudes, as determined by pipe burial depth. On the other hand, up to 50% energy loss can be avoided by adopting a 25 mm thick insulation. These findings suggest that the both pipe burial depth and pipe insulation are important factors to be seriously considered for energy saving in the design and implementation of GSHP systems. (C) 2013 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available