Share
IIR document
Comparison of defrosting electricity consumption in the reverse cycle and the hot gas method.
Author(s) : BERTSCH S., EHRBAR M., HUBACHER B., et al.
Summary
The fins of air-cooled evaporators freeze at evaporating temperatures below 0°C. This causes a drop in the heating performance and in addition the evaporator has to be defrosted periodically. Besides a theoretical investigation, measurement data of 13 heat pumps were also analysed. The electrical defrosting energy consumption of heat pumps with reverse cycle defrosting consists not only of the electrical energy during the defrosting cycle but also of indirect energy losses, like those caused by the 4-way valve. If all these effects are taken into account, the difference in electrical defrosting energy consumption of hot gas defrosting and reverse cycle defrosting becomes small. The results also show that there is a big potential for improvement in the defrosting of evaporators.
Available documents
Format PDF
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: Comparison of defrosting electricity consumption in the reverse cycle and the hot gas method.
- Record ID : 2004-1189
- Languages: English
- Source: 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
- Publication date: 2003/08/17
Links
See other articles from the proceedings (398)
See the conference proceedings
Indexing
-
Themes:
Heat pumps techniques;
Defrosting systems - Keywords: Reversed cycle; Energy; Comparison; Measurement; Electrical resistance; Air-water; Air-air; Heat pump; Defrosting
-
Experimental research on the reverse-cycle defr...
- Author(s) : XIAO H., ZHANG T., HUANG Y., et al.
- Date : 2006/05/21
- Languages : English
- Source: ACRA-2006. Proceedings of the 3rd Asian conference on refrigeration and air conditioning.
View record
-
Experimental research of a defrosting process i...
- Author(s) : HRYCYK E., LOKIETEK T., ZAKRZEWSKI B.
- Date : 2011/08/21
- Languages : English
- Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
- Formats : PDF
View record
-
Transient simulation of an air-source heat pump...
- Author(s) : LIU Z. Q., TANG G. F., ZHAO F. Y.
- Date : 2003/04/22
- Languages : English
- Source: Cryogenics and refrigeration. Proceedings of ICCR 2003.
View record
-
Air-source heat pumps: criteria for defrost ini...
- Author(s) : KARLSSON F., ERLANDSSON J., FAHLÉN P.
- Date : 2007/08/21
- Languages : English
- Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
- Formats : PDF
View record
-
Visualization study of enhanced flash boiling o...
- Author(s) : NUTTER D. W., O'NEAL D. L.
- Date : 1998
- Languages : English
- Source: ASHRAE Transactions. 1998 Winter Meeting, San Francisco, CA.
View record