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以长春市的一个居住小区为例,对采用不同热媒参数的供暖系统进行经济性分析和分析。结果表明,供热系统的热媒参数对经济性影响较大,热媒温度越高,供热系统的初投资越小。提出了确定最佳回水温度的方法,二次网供水温度为60℃时,最佳回水温度为41.6℃。在以锅炉为热源的供热系统中,损较大,约占总损的78%;对于不同的热媒参数,损差别不大,但供热系统的初投资差别很大。从能源利用及经济性出发,无论一次网还是二次网,提高热媒温度对供热系统是合理的。
Taking a residential district in Changchun as an example, this paper analyzes and analyzes the heating system using different heating medium parameters. The results show that the heat medium parameters of the heating system have greater impact on the economy, and the higher the heat medium temperature, the smaller the initial investment of the heating system. Proposed to determine the best return water temperature method, the secondary network water temperature is 60 ℃, the best return water temperature is 41.6 ℃. In the heating system with boiler as heat source, the loss is relatively large, accounting for about 78% of the total loss. For different heat medium parameters, the difference is not significant, but the initial investment of heating system varies greatly. Starting from the energy utilization and economy, regardless of primary or secondary network, it is reasonable to increase the heating medium temperature for the heating system.