Exergy Analysis of a Vehicle Waste Heat Recovery System with R123 and R245fa as Working Fluids

Lei Shi; Ming Shan Wei; Chao Chen Ma

doi:10.15918/j.tbit1001-0645.2017.09.005

Exergy Analysis of a Vehicle Waste Heat Recovery System with R123 and R245fa as Working Fluids

Lei Shi, Ming Shan Wei^*, Chao Chen Ma

^*Corresponding author for this work

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Using experimental data of the heavy-duty diesel engine, the system exergy analysis was carried out for a vehicle waste heat recovery system which was an organic rankine cycle (ORC) with R123 and R245fa as working fluids. Results show that under different engine speeds, the R123 system exergy efficiency increases with the increase of evaporation pressure and engine load, but the increase rate decreases gradually. Under different engine speeds, the R245fa system exergy efficiency increases first and then decreases with the increase of evaporation pressure, and increases with the increase of engine load. An evaporator is the key point to improving the system exergy efficiency. An appropriate evaporator for the system can improve the system exergy efficiency effectively.

Original language	English
Pages (from-to)	905-912 and 918
Journal	Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology
Volume	37
Issue number	9
DOIs	https://doi.org/10.15918/j.tbit1001-0645.2017.09.005
Publication status	Published - 1 Sept 2017

Keywords

Exergy analysis
Organic rankine cycle
R123
R245fa
Waste heat recovery

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10.15918/j.tbit1001-0645.2017.09.005

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title = "Exergy Analysis of a Vehicle Waste Heat Recovery System with R123 and R245fa as Working Fluids",

abstract = "Using experimental data of the heavy-duty diesel engine, the system exergy analysis was carried out for a vehicle waste heat recovery system which was an organic rankine cycle (ORC) with R123 and R245fa as working fluids. Results show that under different engine speeds, the R123 system exergy efficiency increases with the increase of evaporation pressure and engine load, but the increase rate decreases gradually. Under different engine speeds, the R245fa system exergy efficiency increases first and then decreases with the increase of evaporation pressure, and increases with the increase of engine load. An evaporator is the key point to improving the system exergy efficiency. An appropriate evaporator for the system can improve the system exergy efficiency effectively.",

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T1 - Exergy Analysis of a Vehicle Waste Heat Recovery System with R123 and R245fa as Working Fluids

AU - Shi, Lei

AU - Wei, Ming Shan

AU - Ma, Chao Chen

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Y1 - 2017/9/1

N2 - Using experimental data of the heavy-duty diesel engine, the system exergy analysis was carried out for a vehicle waste heat recovery system which was an organic rankine cycle (ORC) with R123 and R245fa as working fluids. Results show that under different engine speeds, the R123 system exergy efficiency increases with the increase of evaporation pressure and engine load, but the increase rate decreases gradually. Under different engine speeds, the R245fa system exergy efficiency increases first and then decreases with the increase of evaporation pressure, and increases with the increase of engine load. An evaporator is the key point to improving the system exergy efficiency. An appropriate evaporator for the system can improve the system exergy efficiency effectively.

AB - Using experimental data of the heavy-duty diesel engine, the system exergy analysis was carried out for a vehicle waste heat recovery system which was an organic rankine cycle (ORC) with R123 and R245fa as working fluids. Results show that under different engine speeds, the R123 system exergy efficiency increases with the increase of evaporation pressure and engine load, but the increase rate decreases gradually. Under different engine speeds, the R245fa system exergy efficiency increases first and then decreases with the increase of evaporation pressure, and increases with the increase of engine load. An evaporator is the key point to improving the system exergy efficiency. An appropriate evaporator for the system can improve the system exergy efficiency effectively.

KW - Exergy analysis

KW - Organic rankine cycle

KW - R123

KW - R245fa

KW - Waste heat recovery

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DO - 10.15918/j.tbit1001-0645.2017.09.005

M3 - Article

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SN - 1001-0645

VL - 37

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JO - Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology

JF - Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology

IS - 9

ER -

Exergy Analysis of a Vehicle Waste Heat Recovery System with R123 and R245fa as Working Fluids

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