Studies on Heat Storage Water Tank : Part 5-Estimation of Tank Efficiency for Stratified-type Tanks by System Simulation using Design of Experiments Method

Abstract

The storage tank efficiency of stratified-type storage tank in a heat storage system is effected by factors related to system design as well as thermal property of the tank. The authors developed a mixing model of stratified-type water tank in order to simulate thermal responses of the tank in practical storage systems. Many computerized system simulations were carried out under various design factors using a simulation program combined with the mixing model. The effect of the design factors on the storage tank efficiency quantitatively was analyzed by the design of experiments method in which experiments are replaced by the simulations, and the simple estimation tables of the storage tank efficiency were prepared in the same manner as the multi-connected complete-blending tank in Part 3.