Summary
Currently, hydrochlorofluorocarbons and hydrofluorocarbons are the most common refrigerants used for air conditioners. Due to ozone depletion and high global warming potential, environmentally benign options such as hydrocarbons are under consideration. Whilst R290 (propane) has favourable system performance, environmental characteristics and cost, it is a flammable substance, thereby posing additional risks. This study addresses the associated flammability concerns through a number of risk-related sub-studies. These include evaluating the distribution of R290 following a leak in room, overpressure arising from ignition of a flammable mixture, severity of a secondary fire and total heat release rate in the event of an external fire imposed upon an R290 system. It is found that the possibility of refrigerant existing within the flammable range is limited only to the region very close to the indoor unit. Besides, low overpressures in the event of ignition and limited additional heat flux in the event of external fire were registered.
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Details
- Original title: Research on the flammability hazards of an air conditioner using refrigerant R-290.
- Record ID : 30008138
- Languages: English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 36 - n. 5
- Publication date: 2013/08
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Indexing
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Themes:
Other air-conditioning equipment;
Hydrocarbons - Keywords: Air conditioner; R290; Propane; Flammability; Leakage; Refrigerant
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Assessment of leakage and risk reduction of R29...
- Author(s) : TANG W., HE G., SUN W.
- Date : 2018/05
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 89
- Formats : PDF
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Safe design of R290 ducted air-conditioning equ...
- Author(s) : COLBOURNE D., ARANGO A., DICKSON E., et al.
- Date : 2018/06/18
- Languages : English
- Source: 13th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2018). Proceedings. Valencia, Spain, June 18-20th 2018.
- Formats : PDF
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Detailed dynamic refrigerant migration characte...
- Author(s) : LIANG J., LI T.
- Date : 2018/04
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 88
- Formats : PDF
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Risk assessments for a room air conditioner wit...
- Author(s) : YAO K.
- Date : 2000/12/07
- Languages : Japanese
- Source: The International Symposium on HCFC Alternative Refrigerants and Environmental Technology 2000: Latest technology for Energy Conservation, Refrigerants and Recycling on Air-Conditioning and Refrigeration Equipment for the 21st century. Proceedings.
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R290 leakage mass flow rate from a refrigeratin...
- Author(s) : COLBOURNE D., LIU Z. X.
- Date : 2012/06/25
- Languages : English
- Source: 10th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2012). Proceedings. Delft, The Netherlands, June 25-27, 2012.
- Formats : PDF
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