Integration of scroll-expanders into combined absorption cycles for power and refrigeration applications
Number: pap. n. 114
Author(s) : AYOU D. S., BRUNO J. C., GOSWAMI D. Y., et al.
Summary
A semi-empirical model for a scroll expander using ammonia (and ammonia/water mixture with high concentration of ammonia) as a working fluid is developed. This model is validated with experimental data obtained in a test bench and is able to predict the main outputs with an accuracy: of ±4% for mass flow rate, ±8% for the shaft power and ±4 K for exhaust temperature. It is scaled-up to predict the performance of other scroll expanders, with higher swept volume, in the same family series. These semi-empirical models are integrated into a combined absorption power and refrigeration cycle global model for the purpose of representing the real performance of the expansion device in the cycle. The energetic analysis of the combined absorption system shows that it can achieve 14.8-17.8% effective first law efficiency with an overall isentropic efficiency of the expander in the range of about 61-71% for the operating conditions considered in this study (expander inlet temperature and pressure of 105-130°C and 857-1554 kPa respectively). The expander rotational speed of 5000 rpm, absorber and evaporator exit temperatures of 30°C and -5°C, respectively, were kept constant in the energetic analysis of the system.
Available documents
Format PDF
Pages: 9 p.
Available
Public price
20 €
Member price*
15 €
* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).
Details
- Original title: Integration of scroll-expanders into combined absorption cycles for power and refrigeration applications
- Record ID : 30013719
- Languages: English
- Source: International sorption heat pump conference (ISHPC2014), College Park, United States, March 31-April 2, 2014.
- Publication date: 2014/03/02
Links
See other articles from the proceedings (125)
See the conference proceedings
Indexing
-
Analysis of a combined absorption cycle for pow...
- Author(s) : MUYE J., MENDOZA L. C., SCHIFFMANN J., et al.
- Date : 2016/08/21
- Languages : English
- Source: 12th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2016). Proceedings. Édimbourg, United Kingdom, August 21st-24th 2016.
- Formats : PDF
View record
-
Industrial absorption refrigeration units.
- Author(s) : TAKEI T.
- Date : 1995/07
- Languages : Japanese
- Source: Refrigeration - vol. 70 - n. 813
View record
-
Compression-absorption cascade refrigeration sy...
- Author(s) : FERNÁNDEZ-SEARA J., SIERES J., VÁZQUEZ M.
- Date : 2006/04
- Languages : English
- Source: Applied Thermal Engineering - vol. 26 - n. 5-6
View record
-
Nueva planta de absorción en Conservera Campofr...
- Author(s) : ALONSO J. J.
- Date : 1997/03
- Languages : Spanish
- Source: Refrig. Frial - n. 42
View record
-
Combined Power and Cooling for Commercial Build...
- Author(s) : PRAVEEN KUMAR G., SARAVANAN R., CORONAS A.
- Date : 2017/10
- Languages : English
- Source: Air Conditioning and Refrigeration Journal - vol. 20 - n. 4
- Formats : PDF
View record