Abstract
The solar thermal energy system is expected to have immediate and positive effect as for global warming measures. However, the market is shrinking recently, because the introductory effect is not clear to the user. In this research, we developed a simple software which can simulate the introductory effect according to domestic hot-water demand. The simulation can be performed by inputting the method of bathing and a family's number s a demand side and inputting living area, the angle of the roof, etc. from the supply side. The simulation of a business-use institution is also possible by directly inputting the hot-water demand. Moreover, we economically evaluated the introduction of the solar collectors by using the software and proposed the state of the bounty system required for spreading them.
