Study of a new-type household solar water heater

This paper discusses the basic forms of solar water heater, points out some problems of the traditional solar water heater.In order to overcome the limitation of the use of solar water heater in tall buildings, develops a kind of solar water heater depending on gravity cycle.In winter, applying the hot water in central heating system to heat the water in the water tank can solve the problem that the water temperature is too low due to being heated only by solar energy, comparing with heating by power, the operation cost can be lowered.