Economical hot water preparation plant with water preheater - has non-lagged preheater for boiler and solar energy heat exchanger

摘要

The economical hot water preparation arrangement has a boiler in which water is heated. The water is supplied to the boiler (5) in preheated condition. For this purpose the water is passed at first through a vessel (17) exposed to the ambient room temperature. This vessel has walls which are not thermally insulted. The vessel can be also accommodated in the room with the heating boiler (3). This vessel is connected in series into the supply pipe to the boiler and a solar energy heat exchanger circuit (33, 35) can be also connected in the system.