EXPERIMENTAL PERFORMANCE OF THE WATER/CALCIUM CHLORIDE SYSTEM IN A HEAT TRANSFORMER

摘要

Absorption heat transformers are devices with the unique capability of raising the temperature of part of a low grade heat source whilst simultaneously delivering the rest of the heat at a lower temperature. The gross temperature lift attainable 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/calcium chloride working pair in an absorption heat transformer are discussed. The highest gross temperature lift was found to be 19℃ for an absorber temperature of 84℃. The highest value for the coefficient of performance was found to be 0.45, this means that 45% of the waste heat could be recovered at a higher temperature.