IIR document
Blends of carbon dioxide and HFCs as working fluids for the low-temperature circuit in cascade refrigerating systems.
Author(s) : DI NICOLA G., GIULIANI G., POLONARA F., et al.
Type of article: Article, IJR article
Summary
This paper describes an analysis on the performances of a cascade refrigeration cycle operated with blends of carbon dioxide (CO2, or R744) and hydrofluorocarbons (HFC) as the low-temperature working fluid. The aim of this work was to study the possibility of using carbon dioxide mixtures in those applications where temperatures below CO2 triple point (216.58 K) are needed. The analysis was carried out by developing a software based on the Carnahan-Starling-De Santis (CSD) equation of state using binary interaction parameters derived from our experimental data. The properties of the investigated blends (R744/R125, R744/R41, R744/R32, R744/R23) were used to simulate the behaviour of a cascade cycle using ammonia (R717) as the high-temperature-circuit working fluid and operating at evaporating temperatures down to -70 °C. The use of a suction-liquid heat exchanger on the low-temperature side of the circuit was also investigated. Results show that the R744 blends are an attractive option for the low-temperature circuit of cascade systems operating at temperatures approaching 200 K.
Available documents
Format PDF
Pages: 130-140
Available
Public price
20 €
Member price*
Free
* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).
Details
- Original title: Blends of carbon dioxide and HFCs as working fluids for the low-temperature circuit in cascade refrigerating systems.
- Record ID : 2005-1683
- Languages: English
- Subject: HFCs alternatives
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 28 - n. 2
- Publication date: 2005/03
Links
See other articles in this issue (15)
See the source
Indexing
-
Experiment and simulation on the performance of...
- Author(s) : KIM S. G., KIM M. S.
- Date : 2002/12
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 25 - n. 8
- Formats : PDF
View record
-
Performance of hydrocarbon based mixed refriger...
- Author(s) : VENKATARATHNAM G., PASAD G. V., MURTHY S. S.
- Date : 1998/03/18
- Languages : English
- Source: Emerging trends in refrigeration and air-conditioning.
- Formats : PDF
View record
-
Near zeotrope blends or R125-R134a cascade: wha...
- Author(s) : CLODIC D., DEWITTE P.
- Date : 1994/10/24
- Languages : English
View record
-
Miscele di CO2 + HFC per cicli in cascata opera...
- Author(s) : DI NICOLA G., GIULIANI G., POLONARA F., et al.
- Date : 2003/06/27
- Languages : Italian
- Source: Le ultime tecnologie del freddo e del condizionamento [+ annex, videolezione and CD-ROM]./ Technological innovations in refrigeration and air conditioning [+ annex, video and CD-ROM].
View record
-
A vapor-liquid equilibria model for hydrofluoro...
- Author(s) : LI J., SATO H., YOKOZEKI A., et al.
- Date : 1998
- Languages : English
- Source: Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers - vol. 15 - n. 2
View record