Maximum useful energy rate and efficiency of a recuperative Brayton cogeneration plant
来源期刊：中南大学学报(英文版)2013年第1期
论文作者：HAO Xiao-li(郝小礼) ZHANG Guo-qiang(张国强)
文章页码：156 - 163
Key words：recuperative Brayton cycle; cogeneration; optimization; thermodynamics
Abstract: A thermodynamic model was developed to analyze the performance of cogeneration plant based on irreversible recuperative Brayton cycle. A parameter, dimensionless total useful energy rate (DTUER), was used as the criterion for performance optimization of cogeneration plant. The effects of cycle parameters, internal irreversibilities, and recuperator efficiency on maximum DTUER and on the efficiency at maximum DTUER were numerically investigated. The relation between DTUER and cogeneration efficiency was also analyzed. The results show that there exists an optimal compressor pressure ratio which maximizes the DTUER. It is also found that there exists an optimal power-to-heat ratio which results in a dual-maximum DTUER.
HAO Xiao-li(郝小礼)1, ZHANG Guo-qiang(张国强)2
(1. School of Energy and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China;
2. College of Civil Engineering, Hunan University, Changsha 410082, China)
Abstract:A thermodynamic model was developed to analyze the performance of cogeneration plant based on irreversible recuperative Brayton cycle. A parameter, dimensionless total useful energy rate (DTUER), was used as the criterion for performance optimization of cogeneration plant. The effects of cycle parameters, internal irreversibilities, and recuperator efficiency on maximum DTUER and on the efficiency at maximum DTUER were numerically investigated. The relation between DTUER and cogeneration efficiency was also analyzed. The results show that there exists an optimal compressor pressure ratio which maximizes the DTUER. It is also found that there exists an optimal power-to-heat ratio which results in a dual-maximum DTUER.
Key words:recuperative Brayton cycle; cogeneration; optimization; thermodynamics
