Thermal performance testing and mathematically modeling of integral collector storage solar hot water systems

An investigation was carried out to evaluate a possible alternative test method for integral collector storage solar hot water systems. After measuring the efficiency and incident angle response, the integral collector storage hot water system would be tested using an electrical heat source to simulate the absorbed solar energy. The reseach included both experimental and analytical investigations on the collector elements and on the complete system. All-day tests were performed on two commercial integral collector storage solar domestic hot water systems.