Rökgaskondensering och skrubber till vedeldade villapannor

Abstract: This paper deals with the opportunities for the technique of condensation, for wood fired household heaters, on the Swedish market. In this project the condenser is preceded by a scrubber and both energy exchange and separation of unburnt particles have been studied. The facility studied is connected to a wood stove at 30 kW. The tests would show that the effect from the stove never reached above 16 kW. This might be a result of the low temperature of the water going into the stove, from the condenser. In addition to this the wood was not of highest quality and the stove could have needed some maintenance before the tests. The maximum effect obtained from the condenser was 4.5 kW, at 12°C. At 20°C the obtained effect still was about 4 kW. If the stove produces 30 kW and the condenser 4,5 kW it would contribute with 13 % of the household's total need for energy. Hydrocarbons, mostly terpens, and carbon monoxide have been detected in the water from the scrubber. This proves that a reduction of these harmful emissions takes place. Unfortunately no evaluation could be made concerning how good the reduction really was. The cost of the prototype facility was 60 000 SEK, a possible reduction of this cost is said to be about 50 %. Even if it is possible to reduce the cost further the market might only be interested in the technique if its ability to reduce the emissions of unburnt particles is properly appraised. This could be accomplished either by stricter regulations regarding how much that is allowed to be emitted or by economic signals, such as taxes.