摘要
对回收内燃机余热的布雷顿循环进行了分析,导出了循环比功、循环效率和各个部件损失的表达式,分析了余热温度、循环压比和换热器有效度对循环比功、效率的影响,得到了该循环的效率特性和输出比功特性,确定了损失最大的位置。结果表明,循环比功和效率随着换热器有效度和余热温度的增加而增加,分别存在最佳循环压比使循环效率和循环比功达到最大值。研究为余热回收型燃气轮机性能的改进提供方向。
Theexergy analysis is carried for a Brayton cycle for IC engine exhaust energy recovery, and the analytical formulae about exergy efficiency, specific work and components exergy losses of the cycle are deduced. The effects of the waste heat temperature, the compressor pressure ratio and the effectiveness of heat exchanger mass flow ratio on the specific work and exergy efficiency of the cycle are analyzed. Moreover, the performance of exergy efficiency and specific work are obtained, and the largest exergy loss location is determined. It is found that the exergy efficiency and the specific work increase with the increases in the waste heat temperature and the effectiveness of heat exchanger, and the maximum exergy efficiency and specific work can be reached by adjusting the compressor pressure ratio.The results obtained in this paper may provide some guidelines for the performance improvement of gas turbine cycles for waste heat recovery.
出处
《装备制造技术》
2015年第3期78-80,共3页
Equipment Manufacturing Technology
关键词
内燃机
余热回收
布雷顿循环分析
效率
比功
IC engine
waste heat recovery
brayton cycle
exergy analysis
exergy efficiency
specific work
作者简介
周剑（1981-），男，浙江丽水人，工程师，管理学硕士，研究方向为质量管理与维护策略。
