Summary
A simultaneous cooling and heating multi-heat pump can improve thermal comfort and energy efficiency through heat recovery at partial load conditions. The performance of a simultaneous heating and cooling multi-heat pump with four indoor units was measured by varying the compressor speed, EEV opening, and fan speed at full and partial load conditions in five operating modes. In the cooling-only and heating-only modes, the heating and cooling capacities were properly controlled by varying the compressor speed. However, in the cooling-main and heating-main modes under partial load conditions, a large imbalance
between the cooling and heating capacities was observed even though the compressor speed was optimized. This capacity imbalance under partial load conditions was optimized by adjusting the EEV openings in the mode change unit and the outdoor unit. In addition, in the entire-heat recovery mode, rating compressor speed ratios were proposed under the full and partial load conditions.
Available documents
Format PDF
Pages: 893-901
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: Performance characteristics of a simultaneous cooling and heating multi-heat pump at partial load conditions.
- Record ID : 30000507
- Languages: English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 34 - n. 4
- Publication date: 2011/06
Links
See other articles in this issue (35)
See the source
-
Independent control of capacity and superheat f...
- Author(s) : LI H., JEONG S. K.
- 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
-
Development of a system identification model fo...
- Author(s) : HAN D. W., CHANG Y. S., KIM S. Y., et al.
- Date : 2012/07/16
- Languages : English
- Source: 2012 Purdue Conferences. 14th International Refrigeration and Air-Conditioning Conference at Purdue.
- Formats : PDF
View record
-
Experimental study of the combined effect of th...
- Author(s) : POTTKER G., MELO C.
- 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
-
Effect of subcooling control on residential hea...
- Author(s) : DE CARVALHO B. Y. K., HRNJAK P.
- Date : 2021/05
- Languages : English
- Source: 2021 Purdue Conferences. 18th International Refrigeration and Air-Conditioning Conference at Purdue.
- Formats : PDF
View record
-
Refrigerant flow characteristics of electronic ...
- Author(s) : XUE Z., SHI L., OU H.
- Date : 2008/02
- Languages : English
- Source: Applied Thermal Engineering - vol. 28 - n. 2-3
View record