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The application of photo-coupler for frost detecting in an air-source heat pump.
Author(s) : BYUN J. S., JEON C. D., JUNG J. H., et al.
Type of article: Article, IJR article
Summary
This experimental study is carried out to investigate reliability and effectiveness of a new method of using a photo-coupler for detecting frost formation in an air source heat pump, and further to determine the most efficient initiation point of the defrost cycle. This new method of using photo-coupler as a frost-sensing device is evaluated by comparing its performance with conventional time control defrost system in which defrost cycle is set to start at predetermined interval, e.g. about every 1-1.5 h. Results indicate that overall heating capacity of the photo-coupler detection method (case IV) is 5.5% higher than that of the time control method. It is also shown that for maximum efficiency, the defrost cycle must be initiated before the frost build-up area exceeds 45% of total front surface of the outdoor coil.
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Pages: 191-198
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Details
- Original title: The application of photo-coupler for frost detecting in an air-source heat pump.
- Record ID : 2006-1482
- Languages: English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 29 - n. 2
- Publication date: 2006/03
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Indexing
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Experimental study on frost growth and dynamic ...
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- Date : 2008/04/05
- Languages : English
- Source: Cryogenics and refrigeration. Proceedings of ICCR'2008.
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Frosting over of cold surfaces.
- Author(s) : BETTANINI E.
- Date : 1995/03
- Languages : Italian
- Source: Industria italiana del Freddo - vol. 39 - n. 2
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A proposal of evaluation of frost layer thickness.
- Author(s) : YOTSUMOTO H., ISHIHARA I., TANIO K., et al.
- Date : 2008
- Languages : Japanese
- Source: Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers - vol. 25 - n. 2
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Frosting behaviour on a cold cylinder surface i...
- Author(s) : YANG D. K., KIM J. S., LEE K. S.
- Date : 2006/05/21
- Languages : English
- Source: ACRA-2006. Proceedings of the 3rd Asian conference on refrigeration and air conditioning.
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Frost retardation of an air-source heat pump by...
- Author(s) : BYUN J. S., LEE J., JEON C. D.
- Date : 2008/03
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 31 - n. 2
- Formats : PDF
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