| 摘要 |
PCT No. PCT/SE91/00012 Sec. 371 Date Sep. 5, 1992 Sec. 102(e) Date Sep. 5, 1992 PCT Filed Jan. 8, 1991 PCT Pub. No. WO91/10868 PCT Pub. Date Jul. 25, 1991.A method of utilizing the high energy values of fossile fuels in central heating boiler systems. The boiler system comprises a processor which includes an air heat pump (5) which functions to cool the system flue gases by condensation. A first fan (10) generates a first circulation (C1) of boiler room air, via the air heat pump (5), this circulation of air also passing through a heat exchanger (4) where heat exchange takes place with the flue gases. A second air circulation (C2) is generated with the aid of a flue-gas fan (7) which removes flue gases from the boiler by suction, thereby generating a subpressure in the boiler room so that fresh air will be drawn in from the ambient surroundings, this air passing through the heat exchanger (4). A lower pressure is maintained on that side of the heat exchanger (4) on which the air/flue gas mixture (C2) flows into the heat exchanger, whereas a higher pressure is maintained on the other side of the heat exchanger (4) on which the air/flue gas mixture (C 2) flows into the heat exchanger (4) on which the cooling boiler-room air circulates (C1). This will ensure that flue gases will always flow out to the free atmosphere, via the heat exchanger (4). The exhaust air/flue gas mixture is caused to pass a cooling device (21) and thereby pre-cooled prior to passing through the heat exchanger in said second circulation. |
