Active coolant control strategies in automotive engines

Kim, K. B.; Choi, Kang Won; Lee, K. H.; Lee, K. S.

doi:10.1007/s12239-010-0091-4

Cited by 46 publications

(15 citation statements)

References 13 publications

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“…Furthermore, it is one of the merits of the heat pump which uses the electric driven compressor rather than internal combustion engines. The coolant warm up time during the cold engine start, with an internal combustion engine, is strongly dependent on the coolant temperature using the wasted heat of the engine, as mentioned in Kim et al [11]. Figure 7(a) shows the transient temperature variations of the outlet air of the heater core units as cabin heaters for compressor start-up.…”

Section: Transient Temperature Performancesmentioning

confidence: 99%

Measurement and Evaluation of Heating Performance of Heat Pump Systems Using Wasted Heat from Electric Devices for an Electric Bus

et al. 2012

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Abstract:The objective of this study is to investigate heating performance characteristics of a coolant source heat pump using the wasted heat from electric devices for an electric bus. The heat pump, using R-134a, is designed for heating a passengers' compartment by using discharged energy from the coolant of electric devices, such as motors and inverters of the electric bus. The heating performance of the heat pump was tested by varying the operating parameters, such as outdoor temperature and volume flow rate of the coolant water of the electrical devices. Heating capacity, compressor work, and heating COP were measured; their behaviors with regard to the parameters were observed. Experimental results showed that heating COP increased with decrease of outdoor temperature, from 20.0 °C to 0 °C, and it observed to be 3.0 in the case of 0 °C outdoor temperature. The observed characteristics of the heating COP suggest that the heat pump is applicable as the cabin heater of an electric vehicle, which is limited by short driving range.

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Section: Transient Temperature Performancesmentioning

confidence: 99%

Measurement and Evaluation of Heating Performance of Heat Pump Systems Using Wasted Heat from Electric Devices for an Electric Bus

et al. 2012

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“…Easily accessible general purpose CFD commercial software can fulfill the requirements of CFD analysis of various types of heat exchangers including but not limited to plate, shell and tube, vertical mantle, compact, and printed circuit board exchangers . Numerical simulation method also can be used to research the heat flow field characteristics of batteries …”

Section: Introductionmentioning

confidence: 99%

“…8 Numerical simulation method also can be used to research the heat flow field characteristics of batteries. 9 According to the heat transfer medium, the cooling method of battery thermal management can be divided into air cooling, liquid cooling, and phase-change cooling. 10 Xu et al 11 used CFD methods to research aircooled battery pack basing on field synergy principle.…”

Section: Introductionmentioning

confidence: 99%

Battery module thermal management based on liquid cold plate with heat transfer enhanced fin

2019

Int J Energy Res

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Summary Battery, as the main energy storage element, directly affects the performance of electric vehicle. Battery thermal management research is required as the battery performance influenced by temperature obviously. This article selects liquid cold plate with different heat transfer enhanced fins as the research object. The angle and length of fins are chosen as the variables. Computational fluid dynamics (CFD) methods and experiments are used in this research. The fin angle of 15°, 30°, and 45° and fin length of 8, 10, 12 mm are selected to compose enhanced fins. The results indicate that heat transfer fins inside liquid cold plate can significantly decrease the highest temperature of battery module and temperature difference among cells. Otherwise, different fin angle and fin length can achieve different heat dissipation performance, which is not positive correlation. Then the design reference of heat transfer enhanced fin in liquid cold plate is offered.

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“…Wind tunnel testing is a traditionally effective method of determining an automobile's aerodynamic characteristics; however, wind tunnel construction requires a large investment, long cycle tests, and it is difficult to simulate the automobile surface details, wheel rotation, internal flow, and some other complex conditions that can affect a model's aerodynamic characteristics. With the rapid development of computing technology, numerical simulation methods are rising and open a new way to study the aerodynamic performance of automobile . The CFD software FLUENT can simulate body details, internal flow, and some other complex conditions that are difficult to mimic with wind tunnel testing.…”

Section: Introductionmentioning

confidence: 99%

“…With the rapid development of computing technology, numerical simulation methods are rising and open a new way to study the aerodynamic performance of automobile. [2][3][4][5][6][7][8][9][10][11] The CFD software FLUENT can simulate body details, internal flow, and some other complex conditions that are difficult to mimic with wind tunnel testing. According to this realm, Ren Bin 12 studied the effect of rear spoiler on car's aerodynamics characteristics by FLUENT and indicated that choosing a reasonable profile or position of the rear spoiler can directly improve the aerodynamic performances and fuel economy of the vehicle.…”

Section: Introductionmentioning

confidence: 99%

The effect of automobile tail shape on aerodynamic performance

Zhang

et al. 2017

Heat Trans. Asian Res.

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The aerodynamic performance of an automobile is affected by differing automobile tail shapes. Different simple automobile models were designed and analyzed with the FLUENT software; by using this research method, one can qualitatively analyze the automobile flow field, as well as the lift and drag coefficients in an accurate manner. The results from an analysis of different automobile tails indicate that the most improved automobile model tail shape resulted in a drag coefficient of 4.5% lower than the basic model, and a lift coefficient of 41.6% lower than the basic model. This design had the smallest drag coefficient, the smallest lift coefficient, and the best aerodynamic performance when simulated in the FLUENT Software, allowing the user access to a tangible reference basis for choosing an automobile model.

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Active coolant control strategies in automotive engines

Cited by 46 publications

References 13 publications

Measurement and Evaluation of Heating Performance of Heat Pump Systems Using Wasted Heat from Electric Devices for an Electric Bus

Measurement and Evaluation of Heating Performance of Heat Pump Systems Using Wasted Heat from Electric Devices for an Electric Bus

Battery module thermal management based on liquid cold plate with heat transfer enhanced fin

The effect of automobile tail shape on aerodynamic performance

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