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Research Papers: Internal Combustion Engines

Design of Vehicle Cooling System Architecture for a Heavy Duty Series-Hybrid Electric Vehicle Using Numerical System Simulations

[+] Author and Article Information
Sungjin Park

Department of Mechanical Engineering, University of Michigan, 1231 Beal Avenue, Ann Arbor, MI 48109-2133sjpx@umich.edu

Dohoy Jung1

Department of Mechanical Engineering, University of Michigan-Dearborn, 4901 Evergreen Road, Dearborn, MI 48128-1491dohoy@umich.edu

1

Corresponding author.

J. Eng. Gas Turbines Power 132(9), 092802 (Jun 10, 2010) (11 pages) doi:10.1115/1.4000587 History: Received March 31, 2009; Revised September 24, 2009; Published June 10, 2010; Online June 10, 2010

In this study, numerical simulations of the vehicle cooling system and the vehicle powertrain system of a virtual heavy duty tracked series hybrid electric vehicle (SHEV) is developed to investigate the thermal responses and power consumptions of the cooling system. The output data from the powertrain system simulation are fed into the cooling system simulation to provide the operating conditions of powertrain components. Three different cooling system architectures constructed with different concepts are modeled and the factors that affect the performance and power consumption of each cooling system are identified and compared with each other. The results show that the cooling system architecture of the SHEV should be developed considering various cooling requirements of powertrain components, power management strategy, performance, parasitic power consumption, and the effect of driving conditions. It is also demonstrated that a numerical model of the SHEV cooling system is an efficient tool to assess design concepts and architectures of the system during the early stage of system development.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic of a series hybrid vehicle propulsion system

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Figure 2

Off-road profile

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Figure 3

Combined vehicle driving cycle

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Figure 4

Staggered grid system for FDM and design parameters of a compact heat exchanger core

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Figure 5

Schematic of cooling system architecture A (Rad means radiator, EP means electric pump, MP means mechanical pump, T/S means thermostat, and CAC means charge air cooler)

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Figure 6

Schematic of cooling system architecture B

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Figure 7

Schematic of cooling system architecture C: (a) cooling tower 1 and (b) cooling tower 2

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Figure 8

Heat generation rate under three driving conditions

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Figure 9

Performance map of the referenced electric cooling pump

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Figure 10

Power consumptions of three cooling systems under the grade load condition

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Figure 11

Power consumptions of three cooling systems over a combined driving cycle: (a) architecture A, (b) architecture B, and (c) architecture C

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Figure 12

Normalized cumulative power consumption of cooling systems

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Figure 13

Temperature histories of electric components in three architectures over the combined driving cycle: (a) generator, (b) motor, and (c) power bus

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