G0600604 Evaluation of Output Characteristics of Heat Upgrading Operation with CaCl_2/H_2O Chemical Heat Pump

Abstract

Chemical heat pump is a system to upgrade exhaust heat to useful heat. Upgrading unused low temperature exhaust heat by chemical heat pump can contribute to improvement of energy efficiency. In this study, the hydration reaction of CaCl_2, which was able to use exhaust heat of less than 100 degree C, was selected. In this experiment, the actual equipment was simulated, and the experimental output characteristic was evaluated. As a result of the experiment, 60 degree C rise in temperature was shown with the use of the chemical heat pump. And, the coefficient of performance (COP) was 0.52. The CaCl_2/H_2O chemical heat pump is able to use more than 50% of energy of the exhaust heat. Furthermore, pump power for circulating the heat medium oil was less than 5% of the heat output.