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EXPERIMENTAL PERFORMANCE OF THE SYSTEM WATER/MAGNESIUM CHLORIDE IN A HEAT TRANSFORMER
Author(s) -
Barragán R. M.,
Arellano V. M.,
Heard C. L.,
Best R.,
Holland F. A.
Publication year - 1997
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/(sici)1099-114x(199702)21:2<139::aid-er226>3.0.co;2-1
Subject(s) - coefficient of performance , transformer , economizer , lithium bromide , sigma heat , working fluid , thermodynamics , magnesium , lift (data mining) , chemistry , materials science , heat transfer coefficient , nuclear engineering , analytical chemistry (journal) , heat transfer , electrical engineering , heat exchanger , refrigerant , engineering , metallurgy , voltage , physics , critical heat flux , chromatography , computer science , data mining
Absorption heat transformers are devices with the unique capability of raising the temperature of part of a low grade heat source whilst simultaneously rejecting the rest of the heat at a lower temperature. The gross temperature lift that could be attained in the process depends on the characteristics of the working pair. Many combinations of working fluid/absorbent have been proposed although until now the water/lithium bromide system is the most widely used. Experimental results for the water/magnesium chloride working pair in an absorption heat transformer are presented. Two different ranges for the absorber temperature were investigated. The absorber temperature varied from 81 to 89°C and from 91 to 101°C. For the first case, the gross temperature lift was calculated between 7⋅8 and 10⋅2°C whilst for the second case the gross temperature lift was found to be between 15 and 18⋅4°C. For both sets of experiments, the heat input was maintained constant and the calculated coefficient of performance was related to the absorber temperature, the flow ratio and the effectiveness of the economizer. © 1997 by John Wiley & Sons, Ltd.