Experimental investigation on a novel multi-branch heat pipe for multi-heat source electronics

Cai, Yanghua; Li, Zongtao; Zhai, Jingmei; Tang, Yong; Yu, Binhai

doi:10.1016/j.ijheatmasstransfer.2016.08.080

Cited by 54 publications

(9 citation statements)

References 30 publications

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“…Having validated Simscape as a means to model a BTMS, a multi branched heat pipe (MBHP) setup was created in Simscape. Previous work [8] investigating the use of MBHP's for heat dissipation reported thermal resistance and effective thermal conductivities values of 0.12 o C/W and 21.2 × 10 3 W/m.K. These values were used in the Simscape model for a MBHP structure similar to that shown in Fig.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…Recent literature [8] on heat pipe design has investigated the use of a dual evaporator, T-shaped multi-branched heat pipe (MBHP) to cool multiple electronic components. Results for thermal resistance showed a strong dependence on filling ratio (FR) as values doubled from 0.06 o C/W to 0.12 o C/W for a 75% to 100% FR.…”

Section: Introductionmentioning

confidence: 99%

“…Heat pipes offer a passive solution for heat dissipation thus minimising pumping power requirements. A multi-branched heat pipe system, where two evaporators lead to a single condenser, has shown promising results [8] in terms of thermal resistance but also in the design of compact cooling solutions for densely packed heat dissipating components [8]. As such the objectives of the current study are to experimentally evaluate the performance of standard copper powered sintered heat pipes for battery thermal management and to develop and validate a model using Simulink-Simscape to predict the operating temperatures of the simulated batteries for both single and multi-branched heat pipe setups.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of a Battery Thermal Management System for Electric Vehicles using Heat Pipe Technology

Guinan¹,

Mooney²,

Ottman³

et al. 2022

World Congress on Mechanical, Chemical, and Material Engineering

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This paper presents an analysis of the performance of a heat pipe assisted battery thermal management system (BTMS) as a means of passive heat dissipation from EV batteries to minimise required pumping power. A BTMS incorporating both standard heat pipes and multi-branched heat pipes (MBHPs) is analysed. The standard heat pipe configuration is analysed experimentally using a custom-built test rig and numerically using thermal equivalent circuit (TEC) models developed using MATLAB's Simscape software. The MBHP setup is analysed numerically having validated the TEC models using the experimental data from the standard configuration. Experimental results showed that the standard heat pipe BTMS provided sufficient cooling at heat loads of <40W. However, at heat loads of 40W the maximum battery temperature marginally exceeded the maximum temperature criteria with a maximum battery block temperature of 42.9 o C and temperature difference between battery blocks of 4.3 o C recorded. Due to an increase in heat transfer coefficient with increasing coolant flow rate, the battery block temperature and temperature difference decrease. This decrease in temperature is counteracted by a decrease in the coefficient of performance of the cold plate by approximately 70% as pumping power increases due to increased pressure drop across the cold plate. This showed there are marginal gains to increasing flow rate in the BTMS. Numerical analysis of both setups shows a similar temperature response of the simulated batteries to the experimental setup with analytical results being within 15% the of experimental values. Therefore, a TEC can be used to predict battery temperatures. Numerical results show increased battery temperature for an MBHP setup but kept within the operating range for heat loads of <20W suggesting MBHP's can perform sufficiently for normal battery discharge rates.

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Section: Numerical Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of a Battery Thermal Management System for Electric Vehicles using Heat Pipe Technology

Guinan¹,

Mooney²,

Ottman³

et al. 2022

World Congress on Mechanical, Chemical, and Material Engineering

View full text Add to dashboard Cite

show abstract

“…For example, McGlen et al [16] utilized three heat pipes to maintain the temperature of three heat dissipating chips below 70 °C. Although this method was effective and simple, it requires a large volume and low spatial utilization [17]. An alternative approach would be to implement a larger heat pipe and use it to cool multiple components in the circuit, a configuration known as multi-heat source (MHS) heat pipes.…”

Section: Nomenclaturementioning

confidence: 99%

“…It is evident that the total radial heat flux is ~15 times higher for the MHS configuration, compared to the baseline SHS. From previous studies [4,17], it is postulated that the rate of evaporation is higher in an MHS heat pipe, resulting in insufficient fluid reaching the furthest heat source from the condenser section, as illustrated in figure 16. Hence, the heat pipe does not effectively cool the latter saddles, as demonstrated from the data in figures 10 and 13.…”

Section: Comparison Of Shs Mhs and Mhs With A Bendmentioning

confidence: 99%

Analysis of Sintered Wicked Heat Pipes for Space-Constrained Multiple Component Cooling

Mooney

Egan

Quinlan

et al. 2021

IEEE Trans. Compon., Packag. Manufact. Technol.

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Contemporary electronic cooling applications can feature complex heat pipe configurations with multiple heat sources (MHS), and one or more bends in various locations to meet physical constraints. It is typically understood that implementing a bend or adding MHS to a heat pipe that was tested for a straight single heat source (SHS) heat pipe can degrade thermal performance. However, the severity of combining the two phenomenon and the effects of changing the location of a bend in a MHS heat pipe are unknown. In this context, this study presents an experimental investigation of the thermal performance of four configurations for 400 mm long, 6 mm diameter; cylindrical copper sintered heat pipes, where small, heated copper saddles are configured as evaporators: a pipe with a SHS; a pipe with MHS; an MHS heat pipe with an increasing bend angle from 0° -90°; and an MHS heat pipe where the location of a 90° bend is moved along the axis. The results demonstrate that a bent MHS heat pipe does not act in a similar manner to a conventional SHS heat pipe or a straight MHS heat pipe. It was found that the thermal resistance increases by up to 65% when the configuration is changed from SHS to MHS, and bend angle is found to increase the resistance by a further 15-65%. For the MHS cases, bend location induces resistance increases of ~5-18%. Furthermore, the optimum bend location for the MHS case is found to be adjacent to the middle evaporator (of five), for cases in which the heat load is evenly distributed before and after the bend. The results suggest that the combination of MHS, bend angle and bend location have unique effects on the fluid transport mechanisms inside the heat pipe and, thus, thermal performance changes between bend location configurations. Therefore, it is concluded that a bent MHS heat pipe configuration should not be designed on the basis of the thermal characteristics for straight SHS heat pipes.

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Computational Analysis on Thermo-Hydrodynamic Characteristics of Y-Shaped Multi-branched Micro Heat Pipe

Bakhirathan

Kumar

2021

Lecture Notes in Mechanical Engineering

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Experimental investigation on a novel multi-branch heat pipe for multi-heat source electronics

Cited by 54 publications

References 30 publications

Analysis of a Battery Thermal Management System for Electric Vehicles using Heat Pipe Technology

Analysis of a Battery Thermal Management System for Electric Vehicles using Heat Pipe Technology

Analysis of Sintered Wicked Heat Pipes for Space-Constrained Multiple Component Cooling

Computational Analysis on Thermo-Hydrodynamic Characteristics of Y-Shaped Multi-branched Micro Heat Pipe

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