Experimental evaluation of the thermal performances of a thermosyphon cooling system rejecting heat by natural and forced convection

Cataldo, Filippo; Thome, John R.

doi:10.1016/j.applthermaleng.2017.08.166

Cited by 24 publications

(2 citation statements)

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“…Cataldo et al 6 experimentally estimated the thermal performance of the CLT with heat rejected by both natural and forced convection. They found that a thermosyphon with an air cooling condenser can dissipate high heat fluxes with very low power consumption.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations of pump‐driven closed‐loop thermosyphon system

Birajdar

Sewatkar²

2022

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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

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“…Water performs better than R134a and R22, but it requires higher temperatures. Cataldo and Thome 16 experimented on the CLT of the multichannel evaporator with the condenser of both forced and natural convection mode. It is noticed that the air-cooled condenser with and without forced convection may dissipate high heat fluxes of the multichannel evaporator like power electronics.…”

Section: Introductionmentioning

confidence: 99%

Effect of adiabatic length on the performance of closed‐loop thermosyphon system

Birajdar

Sewatkar

2020

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This paper reports the effect of different adiabatic lengths on the thermal performance of loop thermosyphon with different filling ratios (FRs) and heat inputs. The carbon steel thermosyphon loop for three different adiabatic lengths is used in this analysis. The loop with plate-type, forced air-cooled condenser, along with two vertical inline evaporators, is filled and tested with distilled water. The transient and steady-state analyses are carried out to understand the thermal behavior of the loop. The thermal resistance is found to be lowest at 800-mm adiabatic length and 60% FR. The geyser boiling phenomenon is also noticed in the present thermosyphon loop. The period of oscillation and temperature fluctuations in the evaporator and condenser increase with the adiabatic length. The geyser boiling phenomenon may disappear at a very small adiabatic length of the loop thermosyphon with forced air-cooled condenser. This paper proposes a mathematical model for the loop thermosyphon in terms of the Nusselt number, the Reynolds number, the Prandtl number, and the adiabatic length-todiameter ratio, and the comparative study shows that proposed model validates the experimental results. Also, it is found that the adiabatic length-to-diameter ratio inversely varies with the Nusselt number.

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