Saisorn, Sira
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Preferred name
Saisorn, Sira
Alternative Name
Saisorn, S.
Main Affiliation
Email
sira.sa@kmitl.ac.th
17 results
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Item type:Publication, Pool boiling heat transfer enhancement of distilled water with passive rotating blades installed above the heating surface(2017-01-01); ; Wongwises, SomchaiThis study examined the pool boiling heat transfer of distilled water on a copper heating surface with passive rotating blades installed above the heating surface. The rotating blades were made from copper material, with a diameter of 30 mm, a core of 5 mm, a length of 50 mm, and a blade angle of 90°. The number of blades in this experiment varied between 2, 3, and 4. The study examined the effects of a varying number of blades and the distance between the heating surface and rotating blades (L<inf>SB</inf>) on the pool boiling heat transfer coefficient. The experimental results show that, when compared under the same conditions, the rotor with four blades yielded a higher heat transfer coefficient than those with two and three blades. This is because the added blades increased the area that received strike force from the bubbles. As a result, the rotating blades created more disturbance of the working fluid over the heating surface. Furthermore, when compared with the same number of blades, the L<inf>SB</inf> of 5 mm yielded a higher heat transfer coefficient than the L<inf>SB</inf> of 15 or 25 mm. This is because the increased L<inf>SB</inf> provided less chance for the bubbles to strike the rotating blades. Hence, the rotating blades did not create a disturbance of the working fluid over the heating surface. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Two-phase heat transfer behaviors of r-134a refrigerant and air-water mixture in A 1 MM internal diameter tube(2016-01-01); ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A critical review of recent investigations on two-phase pressure drop in flow boiling micro-channels(2012-01-01); Wongwises, SomchaiTwo-phase pressure drop during flow boiling has been studied for several decades. Obviously, the publications available on micro-channels are relatively small compared with those for ordinarily sized channels. Although the use of micro-channels yields several advantages, the pressure drop taking p lace in these extremely small channels is higher than that in the ordinarily sized channels because of the increased wall friction. The knowledge of the two-phase pressure drop characteristics in addition to heat transfer phenomena is essential to the design and evaluation of the micro-systems. In this paper, recent research on the flow boiling pressure drop in micro-scale channels is reviewed. The experimental results as well as the relevant prediction methods based on different researchers are presented. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, An experimental investigation of gas-liquid heat transfer in rectangular micro-channels(2013-12-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Flow boiling heat transfer characteristics of R-134a in horizontal and vertical mini-channels(2010-12-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Two-phase flow of R-134a refrigerant during flow boiling through a horizontal circular mini-channel(2011-09-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Flow pattern, void fraction and pressure drop during adiabatic two-phase gas-liquid flow in vertical micro-channel(2012-12-01); Wongwises, SomchaiThe experimental investigation is performed to study twophase flow pattern, void fraction and pressure drop characteristics in a vertical micro-channel. The test section is a fused silica tube with a diameter of 0.53 mm and a length of 320 mm. Air and water are used as working fluid which is introduced to the test section in vertical upward direction. The test runs are done at superficial velocities of gas and liquid ranging respectively from 0.375 to 21.187 m/s and 0.004 to 2.436 m/s. Stereozoom microscope mounted together with camera are employed to conduct flow visualization from which slug flow, throat-annular flow, churn flow, annular flow and annular-rivulet flow are observed. Based on image analysis, void fraction data are obtained and found to be linear relationship with volumetric quality. The frictional pressure drop is relatively high when the formation of churn flow is established. Besides, the two-phase frictional multiplier is found to be strongly dependent on both mass flux and flow pattern. Copyright © 2012 by ASME. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Number of blades of rotating blades affecting the boiling heat transfer enhancement of distilled water(2019-09-09); ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, The difference in flow pattern, heat transfer and pressure drop characteristics of mini-channel flow boiling in horizontal and vertical orientations(2018-04-01); ; Wongwises, SomchaiFlow pattern, heat transfer, and pressure drop data for different flow orientations was presented in this study. The data was obtained based on flow boiling experiments with R-134a flow through a 1 mm diameter channel which was aligned in different orientations, i.e. horizontal flow, vertical upward flow, and vertical downward flow. A constant surface heat flux condition was performed under a saturation pressure of 8 bar, a heat flux range of 1–60 kW/m<sup>2</sup>, and a mass flux range of 250–820 kg/m<sup>2</sup>s. The experimental results showed the importance of the change in the flow direction. The shape of the gas slug during horizontal flow did not look the same as in the vertical orientations. Heat transfer coefficient and pressure drop became increased when the refrigerant flowed in the vertical downward direction. The experimental data was also compared with the existing prediction methods. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A critical review of recent investigations on flow pattern and heat transfer during flow boiling in micro-channels(2012-01-01); Wongwises, SomchaiA summary of recent research on flow boiling in micro-channels is provided in this article. This review aims to survey and identify new findings arising in this important area, which may contribute to optimum design and process control of high performance miniature devices comprising extremely small channels. Several criteria for defining a micro-channel are presented at first and the recent works on micro-scale flow boiling are subsequently described into two parts including flow visualization and two-phase heat transfer. The results obtained from a number of previous studies show that the flow behaviours and heat transfer mechanisms in micro-channels deviate significantly from those in ordinarily sized channels. Future research with numerous aspects of flow boiling phenomena necessary to answer the fundamental questions is still required.