Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Heat exchange phenomena and COP evaluation in heat pump systems coupled to single borehole heat exchangers
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration. University of Rome "La Sapienza".
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In recent years a growing interest in Borehole Heat Exchangers (BHEs) has been shown in Europe thanks to the increase of installations in systems connected to Ground Source Heat Pumps (GSHPs) used for heating and cooling needs. Different geometries and technical solutions have been de- veloped in order to improve heat exchange with the ground, accompanied by several descriptive models. Recently, innovative technologies as optical fiber for a new Distributed Thermal Response Test (DTRT) have been proposed. This method allows the quantification of the BHE local perfor- mances, so that a more accurate punctual analysis of thermal phenomena is allowed. The aim of this thesis is to locate an analytical model thanks to the most recent data, to achieve the definition of overall efficiency of a single BHE in terms of thermal resistance and of a BHE-GSHP system in terms of evaluation of the Coefficient of Performance. This model accuracy will be verified with new measures in a real installation. A particular attention will be given to the thermal-fluid-dynamics aspects, defining semi-empirical correlation for free and forced convection within the BHE groundwater filling. 

Place, publisher, year, edition, pages
2013.
Keyword [en]
borehole, COP, convection, geothermal, heat pump
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-137234OAI: oai:DiVA.org:kth-137234DiVA: diva2:678525
Subject / course
Heat Transfer
Supervisors
Examiners
Available from: 2014-01-14 Created: 2013-12-12 Last updated: 2014-01-14Bibliographically approved

Open Access in DiVA

fulltext(28962 kB)226 downloads
File information
File name FULLTEXT01.zipFile size 28962 kBChecksum SHA-512
661b1f6f528248fb167c65bbb9191be039d9bad5bc7392d5780be1eecf22c13438d181c59b6edf6d3d7dcda2e9d644e2992b6d7698ed8691144effdc0aa22ab4
Type fulltextMimetype application/zip

By organisation
Applied Thermodynamics and Refrigeration
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 226 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 157 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf