水煤浆热电联产集中供暖系统环境分析
摘要：采用清洁燃料水煤浆的热电联产系统被视为传统燃煤系统的高效替代，目前缺乏针对此类系统环境性能的定量评价研究，且现有研究大多建立在仿真模型的基础上。本文以某实际运行的热电联产集中供暖系统为例，采用环境分析方法，对其热力学性能和环境学性能进行了量化评估。从系统和设备2个层面，确定了其性能水平和提升潜力。结果表明：该系统热力和电力的单位环境学影响值分别为5 434 mPts/GJ和3 617 mPts/GJ,环境学影响的主要来源为设备内部损失，改善措施主要为提高设备效率；水煤浆锅炉和汽水换热器具有较大的环境学性能提升潜力。
关键词：热电联产集中供暖环境分析水煤浆环境学性能环境学影响效率
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参考文献[1] 清华大学建筑节能研究中心.中国建筑节能年度发展研究报告2019[M].北京：中国建筑工业出版社，2019:13- 14.
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[13] 包绍麟，宋国良，傅海涛，等.70 MW水煤浆循环流化床热水锅炉的设计与运行[J].工业锅炉，2020(5):7- 10.
[2] KONG B,GALLAGHER K P.The new coal champion of the world:the political economy of Chinese overseas development finance for coal-fired power plants[J].Energy policy,2021,155:112334.
[3] 龙惟定，梁浩.我国城市建筑碳达峰与碳中和路径探讨[J].暖通空调，2021,51(4):1- 17.
[4] MALDAGUE P E.Combined heat and power (CHP) vs seperate heat and power (SHP) generation for primary energy conservation[J].Journal of heat recovery rystems,1984,4(5):337- 340.
[5] MEYER L,TSATSARONIS G,BUCHGEISTER J,et al.Exergoenvironmental analysis for evaluation of the environmental impact of energy conversion systems[J].Energy,2009,34(1):75- 89.
[6] 丁洋.有机朗肯循环系统环境及能值分析[D].重庆：重庆大学，2017:4- 7.
[7] 王光烛.混合太阳能微型燃气轮机系统环境学分析与评价[D].杭州：浙江大学，2020:50- 56.
[8] 陈菁.环境影响分析方法及安全基准环境模型的研究[D].重庆：重庆大学，2010:14- 18.
[9] 闫水保，王为术.固体与液体燃料化学的估计[J].华北水利水电学院学报，1999,20(3):53- 55.
[10] 廉乐明，谭羽非，吴家正，等.工程热力学[M].5版.北京：中国建筑工业出版社，2007:100- 101.
[11] CAVALCANTI E J C.Exergoeconomic and exergoenvironmental analyses of an integrated solar combined cycle system[J].Renewable and sustainable energy reviews,2017,67:507- 519.
[12] LOZANO M A,VALERO A.Theory of the exergetic cost[J].Energy,1993,18:939- 960.
[13] 包绍麟，宋国良，傅海涛，等.70 MW水煤浆循环流化床热水锅炉的设计与运行[J].工业锅炉，2020(5):7- 10.
Exergoenvironmental analysis of a combined heat and power system for district heating using coal water slurry
Abstract: The combined heat and power(CHP) system using clean fuel coal water slurry has been regarded as a high-efficiency alternative for conventional coal-fired district heating systems. However, there is a lack of quantitative evaluation of the environmental performance of such systems, and the previous research is mostly based on the simulation model. In this paper, taking an actual running CHP system for district heating as an example, the thermodynamic and environmental performances are quantitatively evaluated by means of exergoenvironmental analysis. From the two levels of system and equipment, the performance level and improvement potential are determined. The results show that the environmental impacts per unit exergy of thermal and the power of the system are 5 434 mPts/GJ and 3 617 mPts/GJ, respectively. The exergy destruction of system components is the dominant source of total environmental impacts, and the improvements in the environmental performance should focus on enhancing components' exergy efficiency. The coal water slurry boiler and the steam-water heat exchanger have greater potential to improve environmental performance.
Keywords: combined heat and power; district heating; exergoenvironmental analysis; coal water slurry; environmental performance; environmental impact; exergy efficiency;
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