Hybrid Pulsating Heat Pipe for space applications with non-uniform heating patterns: Ground and microgravity experiments

Mangini, Daniele; Mameli, Mauro; Fioriti, Davide; Filippeschi, Sauro; Araneo, L.; Marengo, Marco

doi:10.1016/j.applthermaleng.2017.01.035

Cited by 62 publications

(25 citation statements)

References 23 publications

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“…Similarly to previous microgravity experiments performed on a simpler geometry with the same fluid, same internal diameter and same heat flux levels [13] [14], the activation of flow motion and change of the operational regime, is always detected by all the measurements, including the visualization, immediately after the occurrence of microgravity. The difference with respect to the pressure signal recorded for the simpler geometry is the absence of stop-over periods, which is a positive consequence of the higher number of heated zones.…”

Section: Constant Heat Inputsupporting

confidence: 63%

Start-up in microgravity and local thermodynamic states of a hybrid loop thermosyphon/pulsating heat pipe

Mameli

Catarsi

Mangini

et al. 2019

Applied Thermal Engineering

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A wickless passive two phase closed loop heat transfer device especially designed for a future implementation on the heat transfer host module of the International Space Station is tested in relevant environment on board a parabolic flight. The tube internal diameter (3mm) is larger than the static capillary threshold evaluated in normal gravity for this working fluid (FC-72), leading the device to work as a loop thermosyphon on ground and in hypergravity conditions, and as a Pulsating Heat Pipe when micro-gravity occurs. Novel start up tests, where the heat load has been provided after the occurrence of microgravity, show that the 20s microgravity period is enough for the device activation and, most important, that the device activation is purely thermally induced and not affected by the previous acceleration field. Two miniaturized pressure transducers and direct fluid temperature measurement via two micro-thermocouples, allow to provide a detailed insight on the fluid local thermodynamics states both in the evaporator and in the condenser zone during microgravity. It is shown that the two-phase fluid close to the evaporator and the condenser is subjected to several degrees (up to 5 K) of superheating or subcooling. The level of subcooling seems to increase with the heat input level both in terms of temperature difference and in terms of percentage time with respect to the whole microgravity period.

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Section: Constant Heat Inputsupporting

confidence: 63%

Start-up in microgravity and local thermodynamic states of a hybrid loop thermosyphon/pulsating heat pipe

Mameli

Catarsi

Mangini

et al. 2019

Applied Thermal Engineering

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“…Few researchers have explored the possibility to use PHP under microgravity as well as hyper-gravity conditions. M. Mameli et al [58,83], proposed a new concept of using a PHP with a diameter larger than the capillary dimensions. Except for the ground test in horizontal orientation the device operated well in both ground and in hyper/micro gravity conditions and inclination.…”

Section: Aerospacementioning

confidence: 99%

A Review on Pulsating Heat Pipes: Latest Research, Applications and Future Scope

Dave¹,

Dandale

Shrivastava

et al. 2021

Journal of Thermal Engineering

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Heat pipes have become popular as passive heat dissipation devices for many applications ranging from electronics to heat recovery in recent years. Pulsating Heat Pipe abbreviated as PHP is an exclusive category of a heat pipe which does have wick structure. It transfers heat between its evaporator and condenser sections due to the to and fro movement of working fluid caused due to the continuous change of phase taking place in it. Its operation involves combined hydrodynamic and thermodynamic effects causing the two-phase flow, making it difficult to fully understand it. Nevertheless, the PHPs have drawn the attention of investigators worldwide due to their simplicity in construction and a wide range of applications requiring high heat flux transfer. This review starts with a prologue of the attempts made by various investigators to explain the operation of PHPs through mathematical modeling. Later numerical simulations through Computational Fluid Dynamics of PHP performed by various investigators have been discussed. Review of latest experimental investigations performed on PHPs, is presented concisely in a tabular form. Novel concepts like the application of nanofluids, magnetic field and surfactant, applied for enhancing the performance of the PHPs have been discussed. At the end, applications of PHP and future scope have been discussed.

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“…In view of this examination, meager film vanishing was seen as the predominant warm system, while heat move into the oscillating fluid slug and restricted nucleate bubbling were of optional significance. [28] A hybrid CLPHP with an ID bigger than the capillary-threshold is tested both on ground and in microgravity conditions. The gadget, in part topped off with FC-72, comprises of an aluminum tube (internal distance across: 3 mm) twisted into a planar serpentine with five bends at the evaporator.…”

Section: Effect Of Refrigerants As Working Fluidmentioning

confidence: 99%

A review on Mechanism of fluid flow and Transfer of Heat in Closed Loop Pulsating Heat Pipe

Javvadi¹,

Bhramara

Gangam³

et al. 2020

E3S Web Conf.

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Now-a-days the researchers and people are moving towards such an innovation which meet the needs of the present without compromising the ability of future generations to meet their own needs. In such innovations Pulsating heat pipe is one of the technology which started in 1990 by Akachi. Pulsating heat pipe is a heat transfer device which has an effective heat transfer capability. The researchers had done many experimental and theoretical investigations, but they haven’t got the complete knowledge about it because of its complex operational mechanism which consists of hydrodynamic and thermodynamic coupling effect. This paper gives a brief idea on the thermo-hydro dynamic characteristics of this device. The brief idea will be on internal diameter, cross-section of the tube and the amount of working fluid in system. In addition to all these the number of turns in device and thermo-physical properties of working fluid which leads to determine the thermal behavior. The motto of this paper is to make review paper on recent past years on papers which used refrigerants as working fluids and its fluid flow mechanism and finally lead upcoming researchers to have basic idea and future scope of device.

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Hybrid Pulsating Heat Pipe for space applications with non-uniform heating patterns: Ground and microgravity experiments

Cited by 62 publications

References 23 publications

Start-up in microgravity and local thermodynamic states of a hybrid loop thermosyphon/pulsating heat pipe

Start-up in microgravity and local thermodynamic states of a hybrid loop thermosyphon/pulsating heat pipe

A Review on Pulsating Heat Pipes: Latest Research, Applications and Future Scope

A review on Mechanism of fluid flow and Transfer of Heat in Closed Loop Pulsating Heat Pipe

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