| 摘要 |
A heating system in which gravity is used to create a pressure difference to drive heated fluid around a circuit. The circuit comprises a boiler (1) with or without a circulating pump (6), rising feed and return pipes (26 and 46) connected to the upper end of a counterflow preferably coaxial heat exchanger formed from a downward flowing channel (2a) connected to the feed pipe (2b) and an upward flow return channel (4a) connected to the return pipe (4b). The lower end of the heat exchanger is connected to a heat dispenser (3) which can be a radiator or coil for indirectly heating water in a tank. Radiators (figs. 12-18) incorporating a similar gravity induced flow by means of a downward flowing feed channel (35) closely associated with a rising return channel (36) can be used to improve flow characteristics in the system. |
