Absorption solar cooling systems using optimal driving temperatures.
Author(s) : LECUONA A., VENTAS R., VEREDA C., et al.
Type of article: Article
Summary
The optimum instantaneous driving temperature of a solar cooling facility is determined along a day. The chillers compared use single effect cycles working with NH3/LiNO3, either conventional or hybridised by incorporating a low pressure booster compressor. Their performances are compared with a H2O/LiBr single effect absorption chiller as part of the same solar system. The results of a detailed thermodynamic cycle for the absorption chillers allow synthesizing them in a modified characteristic temperature difference model. The day accumulated solar cold production is determined using this optimum temperature during two sunny days in mid-July and mid-September, located in Madrid, Spain. The work shows the influences of operational variables and a striking result: selection of a time-constant temperature during all the day does not necessarily imply a substantial loss, being the temperature chosen a key parameter. The results indicate that the NH3/LiNO3 option with no boosting offers a smaller production above-zero Celsius degrees temperatures, but does not require higher hot water driving temperatures than H2O/LiBr. The boosted cycle offers superior performance. Some operational details are discussed.
Details
- Original title: Absorption solar cooling systems using optimal driving temperatures.
- Record ID : 30015749
- Languages: English
- Source: Applied Thermal Engineering - vol. 79
- Publication date: 2015/03/25
- DOI: http://dx.doi.org/10.1016/j.applthermaleng.2014.10.097
Links
See other articles in this issue (7)
See the source
Indexing
-
Modelling non-isothermal absorption of vapour i...
- Author(s) : ACOSTA-IBORRA A., GARCÍA N., SANTANA D.
- Date : 2009/06
- Languages : English
- Source: International Journal of Heat and Mass Transfer - vol. 52 - n. 13-14
View record
-
Optimum generator temperatures in four absorpti...
- Author(s) : ALTAMUSH SIDDIQUI M.
- Date : 1993
- Languages : English
- Source: Energy Conversion and Management - vol. 34 - n. 4
View record
-
SOLID ABSORBENTS FOR SOLAR POWERED REFRIGERATIO...
- Author(s) : AGARWAL M. K., AGARWAL R. S., SASTRY Y. V. S. R.
- Date : 1985
- Languages : English
- Source: Int. J. sol. Energy - vol. 34 - n. 4-5
View record
-
OPTIMAL COOLING AND HEATING PERFORMANCE COEFFIC...
- Author(s) : ALTAMUSH SIDDIQUI M.
- Date : 1991
- Languages : English
- Source: Energy Conversion and Management - vol. 31 - n. 1
View record
-
ANALYSIS OF SOLAR ABSORPTION COOLING SYSTEMS WI...
- Author(s) : KUMAR P., DEVOTTA S.
- Date : 1985
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 8 - n. 6
- Formats : PDF
View record