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在这连载的最后一篇中,作者涉及了长距离供热,热提取方法和燃烧的节省几个方面的问题。 长距离供热的发展 在这方面最重要的发展是以非钢管代替钢管,并将其用于无回水单管系统的长距离输热。其中最有前途的是玻璃纤维的塑料管和内有塑料护衬的预应力混凝土管。敷设这类管子比一般的钢管要便宜得多,因为它们耐腐蚀,而且不象钢那样因受热而膨胀和因受冷面收缩。通常可以取消那些价格昂贵的补偿器,同时又可减少水泵输送的能耗。如果采用单管系统,仍存在着区域供热网回水
In this last installment of the series, the author addresses several aspects of long-distance heating, heat extraction methods, and the savings of burning. The development of long-distance heat supply The most important development in this regard is the replacement of steel pipes with non-steel pipes and their use for long-distance heat transmission in return-free single-pipe systems. The most promising ones are glass fiber plastic pipes and prestressed concrete pipes with plastic linings. Laying these types of pipes is much cheaper than normal steel pipes because they are resistant to corrosion and do not swell due to heat and contract due to cold surfaces like steel. It is usually possible to eliminate expensive compensators and at the same time reduce the energy consumption of the pump. If a single-pipe system is used, there is still a return to the district heating network.