Results from an Absorption Heat Storage Lab Scale Heat and Mass Exchanger Cycling Test
Abstract
In this paper results of an absorption heat storage cycling test are presented. The specific application is long term heat storage, the test setup is based on a spiral finned tube heat and mass exchanger constructed of stainless steel type 1.4571 and the absorbent working pair is sodium hydroxide and water. A total of 7 cycles are performed at approximately 13.5 hours of absorption and 17 hours of desorption time per cycle. Average concentration of sodium hydroxide in the solution is 48 wt% after desorption and 27 wt% after absorption. Comparison of thermal performance among different cycles is made. No clear tendency of cycling improvement or degradation is found.