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暖通空调杂志社>期刊目次>2017年>第10期

不同供暖模式的能效比较

Energy efficiency comparison of different heating modes

[1]李建锋 [2]吕俊复 [3]冷 杰 [2]宓 林
[1]中国电力企业联合会 [2]清华大学热科学与工程教育部重点实验室 [3]辽宁省电力科学研究院有限公司

摘要:

为了提高城镇居民供暖过程中的能源利用效率,对几种供暖方式的能效指标进行了计算与对比,从而探讨不同环境下的最佳供暖方式。分析结果表明:以不同供暖方式总的能量利用系数为基准,联合动力循环热电联产机组效率最高,其次是分布式燃气热电机组;在地质资源较好、冬季环境温度不太低的地区,大型压缩式热泵的能效指标优于小型燃煤热电联产机组;发展燃煤热电联产机组要尽量保证供热量与当地热负荷相匹配,同时尽可能提高汽轮机的发电效率或进汽参数,以及配套建设吸收式热泵;对于只能建设小型锅炉供暖系统的地方,应该配套建设吸收式热泵,以提高系统的能量利用系数。

关键词:供暖,能量利用系数,热电联产,分布式能源,热泵

Abstract:

In order to improve the energy efficiency of urban heating systems, calculates and compares the energy efficiency indexes of several heating modes to explore the best heating mode under different circumstances. The results show that, based on the total energy utilization coefficient of different heating modes,the combined power cycle cogeneration unit is the most efficient, followed by the distributed gas cogeneration unit. In the area where the geological resources are better and the environmental temperature is not too low in winter, the energy efficiency of the large compressed heat pump is better than that of the small coal-fired cogeneration unit. The development of coal-fired cogeneration units should ensure to match heat supply and local heating load, improve the power generation efficiency or the inlet steam parameters of turbines as much as possible, and construct the absorption heat pump. For the place with small boiler heating system only, the absorption heat pump should be adopted, in order to improve the energy utilization coefficient of the system.

Keywords:heating,energyutilizationcoefficient,combinedheatandpowersystem,distributedenergy,heatpump

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