Comprehensive Summary of Borehole Heat Exchanger Research at KTH
2010 (English)In: IIR/Eurotherm Sustainable Refrigeration and Heat Pump Technology Conference, Stockholm: KTH Royal Institute of Technology, 2010, 69- p.Conference paper (Refereed)
A research project that aims at presenting recommendations for improving the COP of ground source heat pump systems by 10-20% through better design of Borehole Heat Exchangers (BHE) is described in this paper. Experiments are carried out with temperature measurements taken in different BHE types during heat pump operation conditions as well as during the thermal response tests. It is also expected to point out methods for having natural fluid circulation in the BHE, i.e. demonstrating that the heat carrier fluid can naturally circulate thanks to temperature induced density differences along the borehole depth, and thereby avoiding the use of electricity consuming pumps. A brief background presenting the most relevant work regarding BHE research around the world is first presented, followed by a comprehensive description of the current research at KTH. Some new measurements and obtained results are presented as an estimation of to what extent the project results have been achieved is discussed. An analysis on how the project results could allow reducing the borehole depth keeping today’s Coefficient of Performance is presented.
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2010. 69- p.
Borehole Heat Exchanger
IdentifiersURN: urn:nbn:se:kth:diva-73137ISBN: 978-91-7415-693-5OAI: oai:DiVA.org:kth-73137DiVA: diva2:488578
Conference on Sustainable Refrigeration and Heat Pump Technology. Stockholm, Sweden. June 2009
QC 201204252012-02-012012-02-012012-04-25Bibliographically approved