Experimental investigation on mechanical pumped cooling loop for application in future space missions

Liu, Jie; Pei, Nian-qiang; Guo, Kaihua; He, Zhenhui; Li, Ting-xuen; Lv, Mou

doi:10.1016/j.enconman.2008.04.003

Cited by 27 publications

(5 citation statements)

References 6 publications

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“…To overcome the above problems, a forced circulation flow using a pump‐driven loop thermosyphon has been found to be most suitable for electronic cooling applications. Liu et al 20 reported the performance of the heat pipe system with the mechanical pump, and they found that under microgravity conditions the cooling loop performs better and gives good structural stability. Vieira et al 21 studied the CLT with a flat box‐shaped evaporator.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations of pump‐driven closed‐loop thermosyphon system

Birajdar

Sewatkar²

2022

Heat Trans

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The thermal management of the compact electronic system is one of the major challenges in the present power electronics and computational industries. The present paper investigates the effects of a pump-driven flow on the thermal performance of a closed-loop thermosyphon (CLT) system. This paper discusses the effect of pump-driven flow on the thermal performance of CLT. In this study, the experimentation is carried out on the water-charged pump-driven closed-loop thermosyphon (PDLT) with different heat inputs, filling ratios (FR), and adiabatic lengths to understand the effects of these parameters on the thermal performance of the system. The results indicate that the heat transfer performance of CLT is improved using pump-driven flow in the PDLT and the minimum thermal resistance (0.035 k/W) is obtained at FR = 0.6 and 3 kW heat input. It is also noticed that the thermal resistance of PDLT is up to 35% higher than CLT at FR = 0.6, 0.5 kW heat input, and 500 mm adiabatic length. The unstable geyser boiling phenomenon is eliminated from the system at the adiabatic lengths of 200 and 500 mm. However, for long adiabatic length (800 mm), the geyser boiling occurs at a higher FR (FR = 0.6) and moderate heat flux (0.5 kW).

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Section: Introductionmentioning

confidence: 99%

Experimental investigations of pump‐driven closed‐loop thermosyphon system

Birajdar

Sewatkar²

2022

Heat Trans

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“…In addition, Guo studied the feasibility of pumped two‐phase system to dehumidify in the HVAC . Liu et al constructed a mechanically pumped two‐phase system for cooling space equipment. The results indicated that the proposed system handled abrupt temperature changes without causing any dry‐out or temperature instabilities in the evaporator.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on thermal performance of a pumped two‐phase battery thermal management system

2020

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Summary Battery thermal management system (BTMS) is of great significance to keep battery of new energy vehicle (NEV) within favorable thermal state, which attracts extensively attention from researchers and automobile manufacturers. As one BTMS scheme, pumped two‐phase system displays excellent cooling capacity owing to large amount of latent heat usage, while there is limited research efforts focusing on the feasibility of the BTMS scheme. This paper experimentally investigates thermal performance of a pumped two‐phase BTMS heated by a dummy battery with relative high heat fluxes. The effects of heat fluxes, flow rates and cold source temperatures on thermal performance have been studied and conclusions have been drawn accordingly. The results show that the thermal performance of the system is generally enhanced with the increase of the refrigerant flow rates. When the heat flux and cold source temperature are 0.11 W/cm2 and 10°C, respectively, tavg and △tmax are decreased by 3.4°C and 0.5°C, respectively, when the refrigerant flow rate is increased from 0.20 to 1.67 L/min. Meanwhile, heat transfer coefficient is also improved with an increase of the flow rates, while the enhancements become less obvious under high heat flux. In addition, the tavg and △tmax of cold plate surface are increased when the heat flux is elevated, while the tavg at the low flow rate is increased slightly. However, the increase of △tmax is more obvious at the low flow rate, compared to that at high flow rate. When the heat flux is increased from 0.11 to 0.60 W/cm2, tavg is increased by 3.8°C under the flow rate of 0.2 L/min, while that at the flow rate of 1.67 L/min is almost doubled. Meanwhile, the heat transfer coefficient is increased monotonously at the low flow rate, while that at the high flow rate is first decreased and then increased. Besides, lower surface temperatures can be obtained with low cold source temperatures. However, cold source temperatures affect temperature uniformity less.

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“…Drummond et al 20 investigated a pumped two‐phase system with an innovative microchannel design for cooling electronic devices and demonstrated that the proposed system could dissipate a heat flux of up to 910 W/cm 2 . Liu et al 21,22 studied the feasibility of a pumped two‐phase system for cooling electronic devices during space missions. Their results revealed that the proposed system could maintain a stable evaporation temperature with a fluctuation of less than 0.1°C, and no abrupt temperature rise or instability was observed.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of start‐up and transient thermal performance of pumped two‐phase battery thermal management system

Zhu

Fang

2020

Int J Energy Res

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In this study, a pumped two-phase battery thermal management system was developed, and its start-up and transient thermal performances were experimentally evaluated. The start-up behavior was characterized, and the effects of the flow rate, heat flux, and cold-source temperature on the start-up and transient thermal performances were examined. Three start-up modes were observed: fluctuating growth, temperature overshoot, and smooth growth. The fluctuating growth start-up mode appears to be suitable for battery cooling. The transient performance was improved when the flow rate was decreased, which resulted in a quicker start-up and lower average temperature (t avg) and maximum temperature difference (Δt max). Reducing the flow rate from 0.99 to 0.20 L/min significantly shortened the start-up time, lowered t avg and Δt max , and increased the heat transfer coefficient (α) when the steady state was reached. Increasing the heat flux initially improved and then weakened the transient performance of the pumped two-phase system. Increasing the heat flux from 1.1 to 2.8 W/cm 2 initially reduced the start-up time and t avg to 350 seconds and 1.5 C, respectively, but they then significantly increased to 360 seconds and 13.5 C, respectively. The transient t avg and Δt max decreased with the cold-source temperature (t cs), while the start-up time was independent of changes in t cs .

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Experimental investigation on mechanical pumped cooling loop for application in future space missions

Cited by 27 publications

References 6 publications

Experimental investigations of pump‐driven closed‐loop thermosyphon system

Experimental investigations of pump‐driven closed‐loop thermosyphon system

Experimental study on thermal performance of a pumped two‐phase battery thermal management system

Experimental investigation of start‐up and transient thermal performance of pumped two‐phase battery thermal management system

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