Combined central heating system for buildings - has heat recovery heat exchanger with series connected cycle improving efficiency

摘要

The heating system used for private residence, hospitals and industrial buildings, has central heating boiler with circulation to radiators. A secondary heating system is provided for improving the efficiency of the whole heating system. The secondary furnace (32) is provided with a heating exchanger (31) for the utilisation of the waste heat. This heat exchanger can be connected by an additional cycle (30) in series with radiators (15). The heat exchanger system (31) of the secondary furnace (32) can be connected also in series with the central heating boiler (10). The radiator pipe system has a mixing valve (19) at which are connected a boiler cycle (17) and the radiator cycle (18). Additional cycle (30) can be connected to the boiler cycle.