中国电力 ›› 2021, Vol. 54 ›› Issue (9): 198-207.DOI: 10.11930/j.issn.1004-9649.202007105

• 发电 • 上一篇    下一篇

单工质低温余热发电循环性能分析

耿直1, 刘恩帅1, 许曦普2, 顾煜炯3, 文振华1, 李仁凤1   

  1. 1. 郑州航空工业管理学院 航空工程学院,河南 郑州 450046;
    2. 青岛理工大学 机械与汽车学院 山东 青岛 266500;
    3. 华北电力大学 国家火力发电工程技术研究中心,北京 102206
  • 收稿日期:2020-07-20 修回日期:2020-11-01 发布日期:2021-09-14
  • 作者简介:耿直(1991-),男,博士,讲师,从事可再生清洁能源利用、低温余热发电技术的应用开发等研究,E-mail:zhgz@zua.edu.cn;顾煜炯(1968-),男,通信作者,博士,教授,博士生导师,从事电站设备状态监测与维修技术、新能源利用等研究,E-mail:gyj@ncepu.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(51975539);河南省科技攻关项目(19210231047,212102210009);河南省住房城乡建设科技计划项目(HNJS-2020-K08)

Performance Analysis of Low Temperature Waste Heat Power Generation Cycle with Single Working Fluid

GENG Zhi1, LIU Enshuai1, XU Xipu2, GU Yujiong3, WEN Zhenhua1, LI Renfeng1   

  1. 1. School of Aeronautical Engineering, Zhengzhou University of Aeronautics, Zhengzhou 450046, China;
    2. School of Mechanical & Automotive Engineering, Qingdao University of Technology, Qingdao 266500, China;
    3. National Thermal Power Engineering & Technology Research Center, North China Electric Power University, Beijing 102206, China
  • Received:2020-07-20 Revised:2020-11-01 Published:2021-09-14
  • Supported by:
    This work is supported by National Natural Science Foundation of China (No.51975539); Henan Province Science and Technology Research Project (No.192102310471, No.212102210009); Henan Province Housing and Urban-Rural Construction Technology Plan (No.HNJS-2020-K08)

摘要: 为了提高能源利用的高效性和经济性,推进有机朗肯循环系统在低温余热发电领域的应用。通过建立热力学模型,并用Matlab软件进行编程,调用NIST Refprop数据库,选取六氟丙烷作为循环工质,模拟分析有机朗肯循环系统各方面性能。在采用循环输出功率、㶲效率和热效率等热力学指标研究系统热力性能的基础上,分别采用换热面积和CO2年减排量作为评价系统经济性能和环保性能的指标。研究结果表明:单变量时,在冷凝压力为150 kPa时能保证系统性能达到最佳。多变量时,热源温度提高会使经济性能大幅度降低,而系统的热力性能和环保性能有所提高,综合考虑可取热源温度为155 ℃~185 ℃;当系统各性能分别保证最佳时,蒸发压力随热源温度呈现不同形式的变化,但始终不超过3350 kPa。

关键词: 低品位热能, 余热发电, 有机朗肯循环, 模拟计算, 性能分析

Abstract: In order to improve the efficiency and economy of energy utilization, promote the application of the organic Rankine cycle system in the field of low-temperature waste heat power generation. In this paper, by establishing a thermodynamic model and programming with MATLAB software, calling the NIST Refprop database, selecting hexafluoropropane as the circulating working fluid, and simulating and analyzing various aspects of the organic Rankine cycle system performance. Based on the use of thermodynamic indicators such as cycle output power, exergy efficiency and thermal efficiency to study the thermal performance of the system, the heat exchange area and the annual CO2 emission reduction were used as indicators to evaluate the economic performance and environmental performance of the system. The research results show that: when the condensing pressure is 150 kPa, the system performance can be ensured to achieve the best performance when the single variable is used. In the case of multiple variables, the increase of the heat source temperature will greatly reduce the economic performance, and effectively improve the thermal performance and environmental performance of the system. Comprehensively consider the temperature of the heat source to be 155 ℃~185 ℃; when the performance of the system is guaranteed to be the best, The evaporation pressure changes in different forms with the temperature of the heat source, but it never exceeds 3350 kPa.

Key words: low-grade thermal energy, waste heat power generation, organic Rankine cycle, simulation calculation, performance analysis