化工进展2016，Vol.35Issue(9)：2721-2727,7.DOI:10.16085/j.issn.1000-6613.2016.09.013
涡轮增压柴油机余热利用的有机郎肯循环烃类高温工质热力学分析
Thermodynamic analysis of an organic Rankine cycle for waste heat recovery of a turbo-charged diesel engine based on working fluids of alkanes
摘要
Abstract
An organic Rankine cycle system used in a turbo-charged diesel engine waste heat recovery was proposed and analyzed. In order to select the best waste heat source of engine,the available energy of different waste heat sources was compared based on energy analysis and exergy analysis. Then,the thermodynamic analysis of organic Rankine cycle for recovering waste heat from engine was presented. The cycle parameters based on 10 working fluids of alkane,including the thermal efficiency(η),net power output per unit mass flow rate of exhaust(Pn),exergy efficiency(ηex),total exergy destruction rate(Itot)and turbine volume flow ratio(VFR),were analyzed and optimized. The impacts of evaporating pressure on the parameters of the cycle were performed by establishing the energy and exergy model of the organic Rankine cycle. The results showed that the EGR waste heat was the best heat source. Theη,Pn,ηex and VFR of selected working fluids increased with the increase of evaporating pressure,whileItot decreased. Theη,Pn,ηex and VFR of linear alkanes increased with the increase of critical temperature,whileItot decreased under the same evaporating pressure. Cyclopentane was considered as the most suitable working fluids when taking into account of VFR≤50,which had the highest thermal efficiency and exergy efficiency in all the selected alkane working fluids.关键词
余热利用/有机朗肯循环/烷烃类工质/柴油机/㶲效率Key words
waste heat recovery/organic Rankine cycle/alkane/turbo-charge diesel engine/exergy efficiency分类
能源科技引用本文复制引用
王明涛,方筝,刘启一..涡轮增压柴油机余热利用的有机郎肯循环烃类高温工质热力学分析[J].化工进展,2016,35(9):2721-2727,7.基金项目
山东省自然科学基金（ZR2014EEP026）及鲁东大学科研基金（27860301）项目。 （）
