1998 Volume 24 Issue 6 Pages 862-867
A chemical heat pipe system using the endothermic heat of mixing of solid-liquid (s-l) or liquidliquid (l-l) mixable materials seems very attractive for cold heat generation and accordingly, evalua-tion of the most suitable mixing-pairs in terms of cold heat capacity is carried out. In s-l pairs, urea/ water and ammonium nitrate/water are found to generate large amount of endothermic heat, about 8.16 kW·kg-1, as soon as the materials are mixed. Similarly, irrespective of the initial temperature, isobutanol/acetonitrile and 1-butanol/acetonitrile are found to produce cold heat of about 0.841 kW-kg-1. For regeneration, drying and distillation processes are reviewed for s-l and l-l systems, respectively, and it is found that heat at 353 K can be used for regeneration. As a result, the authors propose a heat pipe system using low level waste heat energy for cold heat generation based on the endothermic heat of mixing.
