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
Theoretical analysis of CO2 trans-critical system with parallel compression for heat recovery and air conditioning in supermarkets
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.ORCID iD: 0000-0002-2895-774X
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
2015 (English)In: The 24th IIR International Congress of Refrigeration - ICR2015, Yokohama, Japan: International Institute of Refrigeration, 2015Conference paper, Published paper (Refereed)
Abstract [en]

This paper theoretically analyses a CO2 trans-critical booster system in which parallel compression, heat recovery and air conditioning are integrated. The performance of the system is studied in various running modes using flash gas by-pass (FGBP) or parallel compression (PC). These running modes include summer cases with/without air conditioning and winter case with heat recovery.The results show that parallel compression is more efficient than flash gas by-pass in summer cases; the increase in COPtot is up to 14% comparing the best cases for PC and FGBP. The increase in COPtot in winter heat recovery mode is marginal, less than 4-6% and hardly-feasible in practice. Comparing the AC function of the CO2 system with a conventional HFC air conditioning system, it has been found that CO2 system is more efficient in moderate ambient temperatures lower than 20-25°C. The CO2 system’s AC performance is less efficient than HFC solution in ambient temperatures higher than 25°C.To conclude, an integrated CO2 trans-critical booster system can to provide the entire supermarket’s refrigeration and air conditioning demands for cold-mild climates with comparable or higher energy efficiency than the HFC solutions.

Place, publisher, year, edition, pages
Yokohama, Japan: International Institute of Refrigeration, 2015.
National Category
Engineering and Technology
Research subject
Energy Technology
Identifiers
URN: urn:nbn:se:kth:diva-175685OAI: oai:DiVA.org:kth-175685DiVA: diva2:861912
Conference
The 24th IIR International Congress of Refrigeration - ICR2015
Funder
Swedish Energy Agency
Note

NQC 20151216

Available from: 2015-10-19 Created: 2015-10-19 Last updated: 2015-12-16Bibliographically approved

Open Access in DiVA

No full text

Authority records BETA

Karampour, Mazyar

Search in DiVA

By author/editor
Karampour, MazyarSawalha, Samer
By organisation
Applied Thermodynamics and Refrigeration
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 168 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