Abstract
For energy saving and CO2 reduction during idling stops, this study focused on the exhaust gas and exhaust heat of running refrigeration/freezing vehicles. We had proposed a novel system which stores the waste heat by a chemical heat pump and recycles it as coldness for air conditioning during an idling stop. In this study, we performed experiments of the system for enhancing the cold heat production. First, an equilibrium of ethylene glycol water solution vapor pressure and an equilibrium of CaSO41/2H2O/CaSO4 reaction were examined by thermogravimetry. Next, the reaction and cold-heat production characteristics of the chemical heat pump unit were examined for various densities of ethylene glycol water solution. As a result, it was found that the cold-heat of lower than 258 K was recovered for more than 12 hours at over 110 MJ/m 3-CaSO4 in the evaporator with 50 % ethylene glycol water solution.
