✍ Scribed by R. M. Barragán; C. L. Heard; V. M. Arellano; R. Best; F. A. Holland
No coin nor oath required. For personal study only.
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°C for an absorber temperature of 84°C. 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.
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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 characteristi
In order to increase the temperature lift and efficiency of single-absorption heat transformers there are other possible arrangements. Double-absorption heat transformers have a relatively simple design and smaller size compared to two-stage heat transformers. In this work, the thermodynamic perform
In the present paper, the additives 1-octanol and 2-ethyl-1-hexanol, have been used for the first time in a 2 kW single-stage heat transformer installed in the Energy Research Centre of the National University of Mexico utilizing H 2 O/LiBr, operating at absorber temperatures in a range between 70 a