摘要
基于工业余热回收领域的有机朗肯循环低温余热发电系统,利用MATLAB软件编程,针对不同余热温度,考虑外部冷热源对系统经济性影响,研究不同有机工质在单位净输出功率造价、热回收效率、输出功率、膨胀比和蒸发压力等方面的表现。结果表明:R134a、R245fa和R601a分别在余热温度100～124℃、124～130℃和130～240℃条件下,单位净输出功率造价最优;R134a、R152a、R142b和R141b分别在余热温度100～124℃、124～130℃、130～160℃和160～200℃条件下,输出功率和热回收效率均为最优;余热温度160℃以下时,采用11种工质的有机朗肯循环系统的膨胀比均在10以下,而余热温度160℃以上时,膨胀比迅速增大;在蒸发压力限定不大于2.5 MPa条件下,R134a适用的余热温度范围最小,为100～118℃,R113适用的余热温度范围最大,为100～240℃。
Based on organic Rankine cycle in the field of industrial waste heat recovery for low temperature waste heat,using Matlab software programming,in view of the different waste heat temperature,considering the external cooling and heat sources on the system economy influence,different organic substance is studied and compared in terms of cost per kw,heat recovery efficiency,output power,the performance of the expansion ratio and evaporating pressure and so on.The results show that :with the waste heat temperatures of 100 -124 ℃,124 -130 ℃ and 130 -240 ℃,R134a,R245fa and R601 a achieve the best cost per kw,respectively.R134a,R152a,R142b and R141b generate the optimal output power and heat recovery efficiency in the waste heat temperatures of 100 -124 ℃,124 ~130 ℃,130 -160 ℃, and 160 ~200 ℃ ,respectively.With waste heat temperature below 160℃ and 11 types of working fluids for the organic Rankine cycle system,the expansion ratio is below 10.With the waste heat temperature above 160 ℃,the expansion ratio is increased rapidly.Under the condition of the evaporating pressure limit not greater than 2.5 MPa,R134a achieves the minimum applicable waste heat temperature range of 100 - 118 ℃,and Rl13 achieves the maximum applicable waste heat temperature range of 100 -240 ℃.
作者
袁智威
杨中宇
史向彤
YUAN Zhi-wei;YANG Zhong-yu;SHI Xiang-tong(No.703 Research Institute of CSIC,Harbin,China,Post Code :150078)
出处
《热能动力工程》
CAS
CSCD
北大核心
2019年第1期68-73,共6页
Journal of Engineering for Thermal Energy and Power
关键词
工业余热
有机朗肯循环
低温余热发电
工质优选
industrial waste heat
organic Rankine cycle
low temperature waste heat generation
optimal selection of working fluid
作者简介
袁智威(1986-),男,湖南株洲人,中国船舶重工集团公司第七○三研究所高级工程师,E-mail:yzw@hrbgnp.com.
