Simulation of an enhanced integrated collector-storage solar water heater

摘要

Because of the simple in structure and operation, an integrated collector-storage solar water heater (ICSSWH) is cheaper than the other solar devices. An efficient ICSSWH system is numerically simulated and validated, in this paper. The proposed system is a baffle plate type storage unit. The storage unit of this system is divided by two trapezoids cross section volumes. The top trapezoid cross section (with the volume of V_A) is bigger than the bottom (with the volume of V_B) so that the most heat is stored above collector. To evaluate the performance of this modified ICSSWH system, the high degree stratified mult-inode approach is conducted inside the storage unit. It was seen that in the case as V_A/V_B ≥ 4. then the present ICSSWH system efficiency is maximized. Comparison results show that the present modified ICSSWH system has higher efficiency than others previous rectangular and triangular types of the storage unit.