Experimental and theoretical investigation of surface temperature non-uniformity of spray cooling

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

doi:10.1016/j.energy.2010.10.044

Cited by 68 publications

(18 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Chen et al [12] measured the spray cooling efficiency of the spray system and concluded that to achieve the maximum CHF while using the minimum quantity of water, it is suggested to select nozzles that produce droplets diameter as small as possible and droplets velocity as high as possible. Cheng et al [13][14][15][16] studied the effect of spray flow rate (range from 26.7 mL/min to 91.7 mL/min) on surface temperature experimentally and numerically. They found that with the increase of spray flow rate, the film thickness and the surface temperature decreased accordingly.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on optimal spray parameters of piezoelectric atomizer based spray cooling

Chen

Cheng

Peng

et al. 2016

International Journal of Heat and Mass Transfer

Self Cite

View full text Add to dashboard Cite

Piezoelectric atomizer could enhance heat transfer of spray cooling at low flow rate through improved atomization of liquid droplets. To optimize the heat transfer performance of piezoelectric atomizer based spray cooling, a novel piezoelectric atomizer was designed in this paper. The piezoelectric atomizer was composed of two piezoelectric ceramic films (110kHz) and a stainless steel micropore disk with different outlet diameters of 5m, 7m, 9m, 20m and 25m (corresponding flow rates of 0.5 mL/min, 1.0 mL/min, 3.8-5.0 mL/min, 11.0-16.0 mL/min and 20.0-29.0 mL/min, respectively). The effects of micropore outlet diameter, volumetric flow rate and spray height on surface temperature distribution, heat flux and the spray cooling efficiency were studied. It was found that the volumetric flow rate increased with the increase of micropore outlet diameter. As the flow rate increased, the heat flux increased but the spray cooling efficiency decreased as a sacrifice. The correlation between spray cooling efficiency/heat flux and flow rate (range from 0.5 mL/min to 29.0 mL/min) of all atomizers could be generalized into one exponential decay/growth curve. An optimal diameter of 9m could achieve high heat flux of 123.8 W/cm 2 at a relatively low volumetric flow rate of 5.0 mL/min, and the corresponding spray cooling efficiency was as high as 53.8%. For each atomizer, there was an optimal spray height which differs with the micropore outlet diameter.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental study on optimal spray parameters of piezoelectric atomizer based spray cooling

Chen

Cheng

Peng

et al. 2016

International Journal of Heat and Mass Transfer

Self Cite

View full text Add to dashboard Cite

show abstract

“…The cooling site is subjected to convective heat transfer during spray cooling, and an average heat transfer coefficient, h s , over the entire sprayed area is used and assumed to be constant. However, it is well known that the heat transfer coefficient at the sprayed surface is non-uniform and varies between central and peripheral locations [149][150][151][152][153]. To overcome this issue, our preliminary case study considered the spatial distribution of the heat transfer coefficient over the target skin surface.…”

Section: Physical Model and Mathematical Formulationmentioning

confidence: 99%

Numerical Prediction of the Intracellular ICE Formation Zone during Cryosurgery on a Nodular Basal Cell Carcinoma Using Liquid Nitrogen Spray

Sun

Martı́nez-Suástegui

Wang

et al. 2012

International Journal of Spray and Combustion Dynamics

View full text Add to dashboard Cite

Cryosurgery is a surgical technique that employs freezing to destroy target tumor tissue. While the main objective during a cryosurgical procedure is to ensure tissue destruction within the cryolesion, the greatest challenge is how to spare the surrounding healthy tissues from cryoablation. In this work, a historical review of the field of cryosurgery is presented followed by a theoretical study where a mathematical model is developed for cryosurgery on a basal cell carcinoma (BCC) using liquid nitrogen (LN 2 ) spray. The model takes into consideration the anatomic structure of skin tissue and the irregular geometry of BCC. In particular, a methodology for quantitatively determining the extent of the intracellular ice formation (IIF) zone based on the tissue temperature and cooling rate (CR) is proposed, which can directly relate to the necrosis of the cancer cells after cryosurgery. The model is then used to analyze formation of the IIF zone during cryosurgery on a BCC and quantification is provided for the volume of the final IIF zone. A parametric study is also carried out to investigate the effect of various protocol parameters on the final IIF zone. The results should be useful for dermatologists for pre-treatment surgery planning.

show abstract

“…The temperature field of the top‐blown submerged gas‐liquid two‐phase mixing process belongs to the non‐steady‐state temperature field. Temperature field is one of the most convenient parameters commonly used to study heat transfer [19], [20], especially in the study of multiphase heat transfer [21–23]. In recent years, more and more attention has been paid to the temperature field uniformity and non‐uniformity [24–26].…”

Section: Introductionmentioning

confidence: 99%

Investigation on ADDIN CNKISM.UserStyleTemperature Uniformity in a Gas‐liquid Two‐phase Mixing System Stirred by Top‐blown Air^▴

Yang

Wang

et al. 2020

Fuel Cells

View full text Add to dashboard Cite

The purpose of this study is to introduce a new method for quantifying the uniformity of temperature fields. A top‐blown gas‐stirring gas‐liquid two‐phase mixing test bench was set up, combined with an infrared imager, to obtain the temperature distribution of the gas‐liquid two‐phase mixing process. Gas‐liquid two‐phase energy conversion occurs during the physical reaction. The top‐blown gas is in direct contact with liquids of different temperatures to take away some of the heat, causing a difference in the internal temperature distribution of the liquid. The gas is air and the liquid is synthetic heat transfer oil. Using image segmentation and mathematical analogy of local discrepancy functions, the temperature distribution difference and temperature field non‐uniformity coefficient (NUC) of the rectangular region in the actual temperature field are obtained. By calculating the standard deviation of the non‐uniformity coefficient of the temperature field in each working condition, the fluctuation of the uniformity of the temperature field with time is obtained.

show abstract

Experimental and theoretical investigation of surface temperature non-uniformity of spray cooling

Cited by 68 publications

References 19 publications

Experimental study on optimal spray parameters of piezoelectric atomizer based spray cooling

Experimental study on optimal spray parameters of piezoelectric atomizer based spray cooling

Numerical Prediction of the Intracellular ICE Formation Zone during Cryosurgery on a Nodular Basal Cell Carcinoma Using Liquid Nitrogen Spray

Investigation on ADDIN CNKISM.UserStyleTemperature Uniformity in a Gas‐liquid Two‐phase Mixing System Stirred by Top‐blown Air^▴

Contact Info

Product

Resources

About

Experimental and theoretical investigation of surface temperature non-uniformity of spray cooling

Cited by 68 publications

References 19 publications

Experimental study on optimal spray parameters of piezoelectric atomizer based spray cooling

Experimental study on optimal spray parameters of piezoelectric atomizer based spray cooling

Numerical Prediction of the Intracellular ICE Formation Zone during Cryosurgery on a Nodular Basal Cell Carcinoma Using Liquid Nitrogen Spray

Investigation on ADDIN CNKISM.UserStyleTemperature Uniformity in a Gas‐liquid Two‐phase Mixing System Stirred by Top‐blown Air▴

Contact Info

Product

Resources

About

Investigation on ADDIN CNKISM.UserStyleTemperature Uniformity in a Gas‐liquid Two‐phase Mixing System Stirred by Top‐blown Air^▴