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.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
2015 (English)In: Refrigeration Science and Technology, International Institute of Refrigeration, 2015, 2321-2328 p.Conference 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
International Institute of Refrigeration, 2015. 2321-2328 p.
Keyword [en]
Air conditioning, Energy efficiency, IIR filters, Refrigeration, Retail stores, Temperature, Waste heat, AC performance, Booster system, By pass, Critical systems, Flash gas, Running mode, Carbon dioxide
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-207214DOI: 10.18462/iir.icr.2015.0530Scopus ID: 2-s2.0-85016733310ISBN: 9782362150128 (electronic)OAI: oai:DiVA.org:kth-207214DiVA: diva2:1117885
Conference
24th IIR International Congress of Refrigeration, ICR 2015, 16 August 2015 through 22 August 2015
Note

QC 20170629

Available from: 2017-06-29 Created: 2017-06-29 Last updated: 2017-06-29Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

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

Search outside of DiVA

GoogleGoogle Scholar

doi
isbn
urn-nbn

Altmetric score

doi
isbn
urn-nbn
Total: 19 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