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Operational performance of a novel heat pump assisted solar facade loop-heat-pipe water heating system
University of Hull.ORCID iD: 0000-0002-2369-0169
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2015 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 146, 371-382 p.Article in journal (Refereed) Published
Abstract [en]

This paper aims to present an investigation into the operational performance of a novel heat pump assisted solar façade loop-heat-pipe (LHP) water heating system using both theoretical and experimental methods. This involved (1) development of a computer numerical model; (2) simulation of the operational performance of the system by using the model; (3) test rig construction; and (4) dedicated experiment for verification of the model. It was found that the established model is able to predict the operational performance of the system at a reasonable accuracy. Analyses of the research results indicated that under the selected testing conditions, the average thermal efficiency of the LHP module was around 71%, much higher than that of the loop heat pipe without heat pump assistance. The thermal efficiency of the LHP module grew when the heat pump was turned-on and fell when the heat pump was turned-off. The water temperature remained a steadily growing trend throughout the heat pump turned-on period. Neglecting the heat loss of the water tank, the highest coefficient of the performance could reach up to 6.14 and its average value was around 4.93. In overall, the system is a new façade integrated, highly efficient and aesthetically appealing solar water heating configuration; wide deployment of the system will help reduce fossil fuel consumption in the building sector and carbon emission to the environment.

Place, publisher, year, edition, pages
2015. Vol. 146, 371-382 p.
Keyword [en]
Loop heat pipe; Façade; Heat pump; Water heating; Building integration; Operational performance
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:du-24866DOI: 10.1016/j.apenergy.2015.01.096ISI: 000353090900037OAI: oai:DiVA.org:du-24866DiVA: diva2:1094459
Available from: 2017-05-10 Created: 2017-05-10 Last updated: 2017-05-11Bibliographically approved

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Permanent link

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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