Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Dynamic simulation of solar water heating system using supercritical CO2 as mediating fluid under sub-zero temperature conditions
University of Gujrat, Hafiz Hayat Campus, Pakistan.
COMSATS University Islamabad, Pakistan.
Swinburne University, Australia.
Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för ingenjörs- och kemivetenskaper (from 2013).ORCID-id: 0000-0002-4359-2232
Visa övriga samt affilieringar
2019 (Engelska)Ingår i: Applied Thermal Engineering, ISSN 1359-4311, E-ISSN 1873-5606, Vol. 161, artikel-id 114152Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

CO2 is becoming increasingly important as a mediating fluid, and simulation studies are indispensable for corresponding developments. In this study, a simulation-based performance investigation of a solar water heating system using CO2 as a mediating fluid under sub-zero temperature condition is performed using the TRNSYS (R) software. The maximum performance is achieved at a solar savings fraction of 0.83 during July. The as lowest solar savingss fraction of 0.41 is obtained during December. The annual heat production of the proposed system under Fargo climate is estimated to be about 2545 kWh. An evacuated glass tube solar collector is designed, fabricated and tested for various climate conditions. Moreover, a detailed comparison of the system's performance at sub/supercritical and supercritical pressures shows that the annual heat transfer efficiency of the modeled system is 10% higher at supercritical pressure than at sub/supercritical pressures. This result can be attributd to the strong convection flow of CO2 caused by density inhomogeneities, especially in the near critical region. This condition resuls in high heat transfer rates.

Ort, förlag, år, upplaga, sidor
Oxford, UK: Pergamon Press, 2019. Vol. 161, artikel-id 114152
Nyckelord [en]
Supercritical CO2, Sub-zero temperature, Solar water heating; NatRef, Refrigerant
Nationell ämneskategori
Kemiteknik
Forskningsämne
Kemiteknik
Identifikatorer
URN: urn:nbn:se:kau:diva-75363DOI: 10.1016/j.applthermaleng.2019.114152ISI: 000488887200070OAI: oai:DiVA.org:kau-75363DiVA, id: diva2:1360755
Tillgänglig från: 2019-10-14 Skapad: 2019-10-14 Senast uppdaterad: 2019-11-12Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltext

Personposter BETA

Naqvi, Muhammad

Sök vidare i DiVA

Av författaren/redaktören
Naqvi, Muhammad
Av organisationen
Institutionen för ingenjörs- och kemivetenskaper (from 2013)
I samma tidskrift
Applied Thermal Engineering
Kemiteknik

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 9 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf