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Research Papers: Energy Conversion/Systems

Thermodynamic Analysis of Hydraulic Braking Energy Recovery Systems for a Vehicle

[+] Author and Article Information
Satyam Panchal

Faculty of Engineering and Applied Science,
University of Ontario Institute of Technology,
2000 Simcoe Street North,
Oshawa, ON L1H 7K4, Canada
e-mail: satyam.panchal@uoit.ca

Ibrahim Dincer, Martin Agelin-Chaab

Faculty of Engineering and Applied Science,
University of Ontario Institute of Technology,
2000 Simcoe Street North,
Oshawa, ON L1H 7K4, Canada

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received May 14, 2015; final manuscript received July 31, 2015; published online September 23, 2015. Editor: Hameed Metghalchi.

J. Energy Resour. Technol 138(1), 011601 (Sep 23, 2015) (9 pages) Paper No: JERT-15-1190; doi: 10.1115/1.4031510 History: Received May 14, 2015; Revised July 31, 2015

In this study, a thermodynamic analysis of a hydraulic braking energy recovery system used in vehicles is performed for newly developed systems. The present system is related to the field of energy efficiency in vehicles. The energy recovery system comprises a first pump, a hydraulic accumulator, and a hydraulic motor. The first pump is a variable displacement hydraulic pump (VDP). The hydraulic accumulator is connected to the first pump which operates to store hydraulic fluid under pressure. The hydraulic motor is hydraulically connected to the accumulator to receive hydraulic fluid. The motor is adapted to drive a second hydraulic pump, which is hydraulically connected to the auxiliary system, using hydraulic energy stored in the accumulator. The overall charging and discharging efficiencies, and the overall system efficiency is calculated and presented in this paper. For the purpose of the analysis, EES (engineering equation solver) is used. In addition, parametric studies are performed to observe the effects of different substantial parameters, namely, the inlet pressure and temperature of the accumulator, and the reference environment temperature, in order to investigate the variations in the system performance in terms of the efficiencies. Two systems are developed and it is found that the charging and discharging efficiencies for one system are 83.81% and 87.73%, while for the other system the charging and discharging efficiencies are 81.84% and 85.67%, respectively.

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References

Figures

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Fig. 2

Schematic diagram of system B

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Fig. 1

Schematic diagram of system A

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Fig. 3

Effect of the accumulator inlet pressure on the efficiency

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Fig. 4

Effect of the accumulator outlet pressure on the efficiency

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Fig. 5

Effect of the accumulator outlet pressure on the work done

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Fig. 6

Effect of the accumulator inlet temperature on the exergy

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Fig. 7

Effect of the reservoir inlet temperature on the work done

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Fig. 8

Effect of the reservoir inlet temperature on the output power

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Fig. 9

Effect of the reservoir inlet temperature on the efficiency

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Fig. 10

Effect of the accumulator inlet pressure on the efficiency for system B

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Fig. 11

Effect of the accumulator outlet pressure on the efficiency for system B

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Fig. 12

Effect of the accumulator outlet pressure on the work done for system B

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Fig. 13

Effect of the reservoir inlet temperature on the efficiency for system B

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Fig. 14

Effect of the reservoir inlet temperature on the output power for system B

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Fig. 15

Effect of the reservoir inlet temperature on the work done for system B

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