Working fluid selection for the Organic Rankine Cycle (ORC) exhaust heat recovery of an internal combustion engine power plant

[摘要] Organic Rankine cycle technology is capable to efficiently convert low-grade heat into useful mechanical power. In the present investigation such a cycle is used for the recovery of heat from the exhaust gases of a four stroke V18 MAN 51/60DF internal combustion engine power plant operating with natural gas. Design is focused on the selection of the appropriate working fluid of the Rankine cycle in terms of thermodynamic, environmental and safety criteria. 37 candidate fluids have been considered and all Rankine cycles examined were subcritical. The thermodynamic analysis of all fluids has been comparatively undertaken and the effect of key operation conditions such as the evaporation pressure and the superheating temperature was taken into account. By appropriately selecting the working fluid and the Rankine cycle operation conditions the overall plant efficiency was improved by 5.52% and fuel consumption was reduced by 12.69%.

[发布机构] Laboratory of Internal Combustion Engines, Department of Mechanical and Industrial Engineering, Technical Education Institute (TEI) of Western Macedonia, Koila- Kozani, Greece^1

[效力级别] 能源学

[关键词] Evaporation pressure;Exhaust heat recovery;Organic Rankine Cycle(ORC);Organic Rankine cycles;Safety criterion;Superheating temperature;Thermo dynamic analysis;Working fluid selections