Spray characteristics and spray cooling heat transfer in the non-boiling regime

Cheng, Wen‐Long; Han, Feng-Yun; Liu, Qi-Nie; Fan, Huili

doi:10.1016/j.energy.2011.03.039

Cited by 82 publications

(15 citation statements)

References 16 publications

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“…The best performance is obtained at 8 mm within the scope of the experiment, and the heat flux is as high as 263 W/cm 2 with temperature difference of 59.3°C. However, compared to spray flow rate 4.2 L/h for conventional spray cooling [32], the flow rate in VSFEC is only one third of that of conventional spray cooling under the same heat flux. It can be explained as follows: the droplet diameter and temperature decrease a lot after droplet flashes evaporation in VFSEC, these droplets impact the heating surface, forming a liquid film.…”

Section: The Effect Of Spray Height On Heat Transfer Performancementioning

confidence: 90%

Experimental investigation on the heat transfer characteristics of vacuum spray flash evaporation cooling

Cheng

Peng

Chen

et al. 2016

International Journal of Heat and Mass Transfer

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a b s t r a c tVacuum spray flash evaporation cooling (VSFEC) is considered as an alternative effective method for dissipating high heat flux in the field of space thermal control. In this paper, a VSFEC experiment system has been developed to investigate the influence of spray flow rate and spray height on the heat transfer characteristics of VSFEC. The experiment results show that the heat flux can be removed efficiently from the heat source in VSFEC system with a very small spray flow rate, which is only one third of that of conventional spray cooling under the same heat flux. And an optimal flow rate exists in VSFEC, at which the heat transfer approaches to a highest value, it is different from conventional spray cooling in which the heat flux increases with the increasing of spray flow rate all the time, in VSFEC, the heat flux firstly increases and then decreases with increasing of flow rate. Since VSFEC system is an open-loop heat dissipation system, it has very important significance that based on the optimal flow rate to reduce working medium consumption, especially for space thermal control system which has a strict limit on weight. In addition, spray height has an important effect on the heat transfer characteristics of VSFEC and an optimal spray height is also obtained at which the maximum value of heat flux can be achieved.

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Section: The Effect Of Spray Height On Heat Transfer Performancementioning

confidence: 90%

Experimental investigation on the heat transfer characteristics of vacuum spray flash evaporation cooling

Cheng

Peng

Chen

et al. 2016

International Journal of Heat and Mass Transfer

Self Cite

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“…64 While in other study [10], the height that the heater surface was fully 65 covered was not the best height. In the non-boiling regime investigation 66 by Cheng et al [11], it was found that spray cooling heat transfer could 67 be improved by increasing the fluid flow rate and reducing the spray 68 height. Schwarzkopf et al [12] noted that the cooling performance 69 dropped off once the spray angle exceeded 50°in their study about 70 the effect of spray angle in spray cooling.…”

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confidence: 98%

Investigation of spray cooling: Effect of different heater surfaces under acceleration

Pang

Xie

2016

International Communications in Heat and Mass Transfer

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“…The vast majority of work on impinging spray heat transfer has examined surface temperatures above the spray liquid saturation temperature [9]. However, spray cooling has been identified as a potential means of dissipating high heat fluxes at surface temperatures below the liquid saturation temperature, for example, in computer electronics [10,11,12], and the heat transfer mechanisms and parameters such as liquid flow rate, nozzle-to-plate spacing and droplet properties have been investigated [13,14,15]. Both experimental and numerical studies have also been performed for the case of an impinging flow of water droplets entrained in steam [16,17].…”

Section: Introductionmentioning

confidence: 99%

Heat transfer behaviour of a dilute impinging air-water mist jet at low wall temperatures

Quinn

Murray

Persoons

2017

International Journal of Heat and Mass Transfer

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This paper presents experimental work on the heat transfer characteristics of a dilute impinging air-water mist jet. Time-averaged heat transfer measurements are reported, as well as simultaneously obtained high-speed shadowgraph imaging flow visualisation and heat transfer measurements; images of the mist jet impingement and the liquid film that forms on the impingement surface are also included. It is determined that the surface liquid morphology varies with mist loading fraction, and that the heat transfer behaviour of the mist jet reflects these changes. Intermittent thermal disturbance caused by the impingement of the mist jet droplets is proposed as the dominant heat transfer mechanism when the mist loading fraction is very low; as the mist loading fraction increases, evaporation from the surface liquid film and convective cooling due to the film flow become more significant.

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Spray characteristics and spray cooling heat transfer in the non-boiling regime

Cited by 82 publications

References 16 publications

Experimental investigation on the heat transfer characteristics of vacuum spray flash evaporation cooling

Experimental investigation on the heat transfer characteristics of vacuum spray flash evaporation cooling

Investigation of spray cooling: Effect of different heater surfaces under acceleration

Heat transfer behaviour of a dilute impinging air-water mist jet at low wall temperatures

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