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中国电机工程学报 2008, 28(2) 8-13 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 热能工程 |
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基于全工况性能的冷热电联产系统效率指标比较 |
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杨承 杨泽亮 蔡睿贤 |
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华南理工大学电力学院 华南理工大学电力学院 中国科学院工程热物理研究所 |
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摘要：
CCHP系统的效率评价指标对其优化设计、经济运行等至关重要。基于小功率燃气轮机为核心的CCHP系统基本元件的变工况典型解析特性，对比分析了CCHP系统当量yong效率、经济yong效率、总能利用率、节能系数等“效率”形式及其影响因素。采用不同的效率指标评价以小功率燃气轮机为原动力的两类CCHP系统的全工况性能，以说明不同效率指标的差异。分析表明，前述效率形式都不能给出完全合理的评价结果。但相对而言，节能系数能比较合理评价本文 所述两种CCHP系统的优劣，但部分评价结论仍存商榷之处；CCHP系统的部件匹配及经济运行，可综合按全工况节能系数及经济yong用效率来评价。研究结果对CCHP的经济评价、优化配置与经济运行提供理论与实践依据，也利于促进环境保护与资源节约。 |
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关键词：
冷热电联产
效率
变工况特性
解析法
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Comparison of CCHP Efficiencies Based on Off-design Characteristics |
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Abstract:
The indicators for evaluating the efficiency of CCHP systems are vital for optimal design and economic operation. Based on the typical analytical performances of microturbine-based CCHP components, some intrinsic parameters related to the efficiencies with different definitions (i.e., total energy utilization efficiency, equivalent exergy efficiency, economic exergy efficiency and energy saving indicator) were thoroughly discussed. To compare the different efficiencies or indicators, overall off-design characteristics of two types of microturbine-based CCHP systems were evaluated with the efficiencies. The results show that, none of the above efficiencies evaluate CCHP completely; however, energy saving indicator comparatively distinguishes the two systems studied in this paper, except for some incomplete evaluation conclusions. It is proposed the optimal configuration and economic operation be evaluated by integrating energy saving indicator with economic exergy efficiency at off-design conditions. The research provides a theoretical and engineering basis for evaluating CCHP systems, and also is meaningful for promoting energy conservation and friendly environment. |
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Keywords:
CCHP
efficiency
off-design performance
analytical method
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收稿日期 2007-05-08 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 杨承 |
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作者简介: |
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作者Email: chyang1@scut.edu.cn;020ych@21cn.com |
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| 参考文献： |
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| 本刊中的类似文章 |
| 1．冯志兵 金红光.燃气轮机冷热电联产系统与蓄能变工况特性[J]. 中国电机工程学报, 2006,26(4): 25-30 |
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| Copyright by 中国电机工程学报 |
