مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

بررسی آزمایشگاهی اثرات امواج فراصوت بر رسوبات سطحی در جوشش استخری

نوع مقاله : پژوهشی اصیل

نویسندگان
1 گروه مهندسی شیمی، واحدکرمانشاه، دانشگاه آزاد اسلامی،کرمانشاه، ایران
2 گروه صنایع شیمیایی، مرکز علمی کاربردی دهلران، ایلام، ایران
چکیده
افزایش انتقال حرارت و جلوگیری از رسوب ذرات در تجهیزات، همواره مورد توجه مهندسان بوده است.در این تحقیق تغییرات غلظت نمک بر دینامیک حباب تاثیرمستقیم گذاشته و با رسوب بر سطح به عنوان مقاومت انتقال حرارت عمل کرد. بنابراین ابتدا تاثیرامواج فراصوت بر رسوبات نمکی در جوشش استخری بررسی شد. نتایج نشان داد که امواج فراصوت با معلق نگه­داشتن ذرات محلول در سیال و جلوگیری از رسوب آن­ها بر سطح انتقال حرارت، اثر مثبتی بر انتقال حرارت داشت. افزایش اغتشاشات به سبب تغییر در دینامیک حباب وپدیده­ ی کاویتاسیون­، موجب بهبود انتقال حرارت شد. نقش ایجاد زبری بر سطح انتقال حرارت در تولید حباب مورد بررسی قرار گرفت . نتایج نشان داد ترکیب تولید حباب به وسیله افزایش زبری و امواج فراصوت، اثرمهمی در افزایش انتقال حرارت داشته­اند. امواج فراصوت در سه قدرت امواج %۳۰، %۶۰ و %۹۰ اعمال گردید به طوری که توان %۹۰ توانست به ترتیب ضریب انتقال حرارت و قطر جدایش را تا حدود %۴۳/۸ و %۵۴/۷ نسبت به حالت بدون پرتودهی امواج افزایش داده و همچنین رسوب را تا%۱۹/۳۷ کاهش دهد.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Experimental study of the effects of ultrasonic waves on surface sediments in pool boiling

نویسندگان English

Mohsen Khooshehchin 1
Samira Ghotbinasab 2
Akbar Mohammadidoust 1
1 Department of Chemical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
2 Departement of Chemical Industry, University of Applied and Technology, Dehloran Center, Iran
چکیده English

Increasing heat transfer and preventing sedimentation in equipment have always attracted the attention of engineers. In this work, the variations of salt concentration were effective on bubble diameter, departure frequency and generation points and its sediments acted as a heat transfer resistance. Therefore, first, the effect of ultrasonic waves on salt sedimentations in pool boiling was investigated. The results revealed that the ultrasonic waves had positive effect by suspending the soluble particles in the fluid and preventing them from precipitating on the surface of heat transfer. Increasing turbulences and perturbations due to changes in bubble dynamic and cavitation phenomenium, led to improve the heat transfer coefficient, significantly. The role of roughness on the surface heat transfer in bubble production was other investigation of the work. Bubble production by increasing the roughness with ultrasonic wave’s irradiation had direct and important effects on enhancing the heat transfer. Finally, salt and nanofluid sediments were compared. The nanoparticles precipitate faster and more easily under the bubble layer, but less in the salt solution if its dissolution is maintained. The ultrasonic waves were employed at three powers of 30%, 60% and 90%. Finally, the heat transfer coefficient and bubble departure diameter increased as 8.43% and 7.54%, respectively. In addition, the sedimentation decreased by 37.19%. As a result, the waves reduced their deposition by preserving salt dissolution.

کلیدواژه‌ها English

Pool Boiling
ultrasonic waves
Sediment
boiling heat transfer coefficient
1- Sunil L, Kumarappa S, Hegde R. Experimental studies on pool boiling het transferusing alumina andgraphene oxids nanofluids. 2016.
2-Cooke D, Kandlikar SG. Pool boiling heat transfer and bubble dynamics over plain and enhanced microchannels. Journal of Heat Transfer. 2011;133(5):052902.
3-Corradini ML. Fundamentals of multiphase flow. University of Wisconsin, Madison, WI. 1997.
4-Hashemi M, Noie SH. Study of flow boiling heat transfer characteristics of critical heat flux using carbon nanotubes and water nanofluid. Journal of Thermal Analysis and Calorimetry. 2017;130(3):2199-209.
5-Seon Ahn H, Hwan Kim M. A review on critical heat flux enhancement with nanofluids and surface modification. Journal of Heat transfer. 2012;134(2).
6-Kim H. Enhancement of critical heat flux in nucleate boiling of nanofluids: a state-of-art review. Nanoscale research letters. 2011;6(1):415.
7-Kim JM, Kim T, Kim J, Kim MH, Ahn HS. Effect of a graphene oxide coating layer on critical heat flux enhancement under pool boiling. International Journal of Heat and Mass Transfer. 2014;77:919-27.
8-Lee J, Chang SH. An experimental study on CHF in pool boiling system with SA508 test heater under atmospheric pressure. Nuclear Engineering and Design. 2012;250:720-4.
9-Xu J, Ji X, Zhang W, Liu G. Pool boiling heat transfer of ultra-light copper foam with open cells. International Journal of Multiphase Flow. 2008;34(11):1008-22.
10- Yang Y, Ji X, Xu J. Pool boiling heat transfer on copper foam covers with water as working fluid. International Journal of Thermal Sciences. 2010;49(7):1227-37.
11-Yang Y, Ji X, Xu J. Effect of inclination angle on the pool boiling heat transfer of ultra-light copper foams. Heat and mass transfer. 2010;46(7):695-706.
12-Tian Y, Chen Z, Wang N, Cui Z, Cheng L. Experimental investigations on pool boiling on a vertical tube in the confined and unconfined spaces. Applied Thermal Engineering. 2018;133:107-16.
13-Kim H-G, Hwang I-J, Kim S-M. Numerical study on the pool boiling heat transfer of water-based nanofluids on a vertical surface. Journal of Nanoscience and Nanotechnology. 2017;17(11):8404-10.
14-Lu D, Yu Z, Zhong Y, Wang H, Zhang Y, Cao Q, et al. Experimental investigation on boiling heat transfer characteristics of the spent fuel bundle under flooded condition. Nuclear Engineering and Design. 2019;344:168-73.
15-Dareh FR, Haghshenasfard M, Esfahany MN, Jazi HS. Experimental investigation of time and repeated cycles in nucleate pool boiling of alumina/water nanofluid on polished and machined surfaces. Heat and Mass Transfer. 2018;54(6):1653-68.
16-Kshirsagar JM, Shrivastava R. Experimental investigation of nucleate pool boiling characteristics of high concentrated alumina/water nanofluids. Heat and Mass Transfer. 2018;54(6):1779-90.
17-Ciloglu D. An experimental investigation of nucleate pool boiling heat transfer of nanofluids from a hemispherical surface. Heat Transfer Engineering. 2017;38(10):919-30.
18-Ham J, Kim H, Shin Y, Cho H. Experimental investigation of pool boiling characteristics in Al2O3 nanofluid according to surface roughness and concentration. International Journal of Thermal Sciences. 2017;114:86-97.
19-Ali HM, Generous MM, Ahmad F, Irfan M. Experimental investigation of nucleate pool boiling heat transfer enhancement of TiO2-water based nanofluids. Applied Thermal Engineering. 2017;113:1146-51.
20-Kim HD, Kim MH. Effect of nanoparticle deposition on capillary wicking that influences the critical heat flux in nanofluids. Applied physics letters. 2007;91(1):014104.
21-Golubovic MN, Hettiarachchi HM, Worek W, Minkowycz W. Nanofluids and critical heat flux, experimental and analytical study. Applied Thermal Engineering. 2009;29(7):1281-8.
22-Kiyomura IS, Nascimento F, Cunha A, Cardoso EM, editors. Analysis of the influence of surface roughness and nanoparticle concentration on the contact angle. Proc of 23rd ABCM Int Congress of Mechanical Engineering Rio de Janeiro Brazil; 2015.
23-Park SD, Moon SB, Bang IC. Effects of thickness of boiling-induced nanoparticle deposition on the saturation of critical heat flux enhancement. International Journal of Heat and Mass Transfer. 2014;78:506-14.
24-Ebrahimi-Dehshali M, Najm-Barzanji SZ, Hakkaki-Fard A. Pool boiling heat transfer enhancement by twisted-tape fins. Applied Thermal Engineering. 2018;135:170-7.
25-Ahmed O, Hamed M. Experimental investigation of the effect of particle deposition on pool boiling of nanofluids. International Journal of Heat and Mass Transfer. 2012;55(13-14):3423-36.
26-Malayeri MR, Müller-Steinhagen H. Initiation of CaSO4 scale formation on heat transfer surfaces under pool boiling conditions. Heat transfer engineering. 2007;28(3):240-7.
27-Malayeri M, Müller-Steinhagen H, Bartlett T. Fouling of tube bundles under pool boiling conditions. Chemical engineering science. 2005;60(6):1503-13.
28-Esawy M, Malayeri M. Modeling of CaSO4 crystallization fouling of finned tubes during nucleate pool boiling. Chemical Engineering Research and Design. 2017;118:51-60.
29-Kumar N, Raza MQ, Raj R. Surfactant aided bubble departure during pool boiling. International Journal of Thermal Sciences. 2018;131:105-13.
30-Shah J, Ranjan M, Sooraj K, Sonvane Y, Gupta SK. Surfactant prevented growth and enhanced thermophysical properties of CuO nanofluid. Journal of Molecular Liquids. 2019;283:550-7.
31-Mosyak A, Hetsroni G, Fichman M, Moldavsky L, Pogrebnyak E. Effect of heater size on ultrasonic enhancement of boiling in water and surfactant solutions. International Journal of Multiphase Flow. 2016;79:181-9.
32-Lee D, Lim J-S, Lee N, Cho HH. Enhanced thermal uniformity and stability in pool boiling heat transfer using ultrasonic actuation. International Communications in Heat and Mass Transfer. 2019;106:22-30.
33-Jaikumar A, Kandlikar SG. Ultra-high pool boiling performance and effect of channel width with selectively coated open microchannels. International Journal of Heat and Mass Transfer. 2016;95:795-805.
34-Rashin MN, Hemalatha J. A novel ultrasonic approach to determine thermal conductivity in CuO–ethylene glycol nanofluids. Journal of Molecular Liquids. 2014;197:257-62.
35-Zhou L, Wei L, Du X, editors. Subcooled Nucleate Boiling of Alumina Nanofluid With/Without n-Butanol as Surfactant. ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology; 2013: American Society of Mechanical Engineers.
36-Khooshechin M, Fathi S, Salimi F, Ovaysi S. The influence of surfactant and ultrasonic processing on improvement of stability and heat transfer coefficient of CuO nanoparticles in the pool boiling. International Journal of Heat and Mass Transfer. 2020;154:119783.
37-Esfahani NN, Toghraie D, Afrand M. A new correlation for predicting the thermal conductivity of ZnO–Ag (50%–50%)/water hybrid nanofluid: an experimental study. Powder Technology. 2018;323:367-73.
38-Fazel SAA. A genetic algorithm-based optimization model for pool boiling heat transfer on horizontal rod heaters at isolated bubble regime. Heat and Mass Transfer. 2017;53(9):2731-44.
39-Helalizadeh A, Müller-Steinhagen H, Jamialahmadi M. Mixed salt crystallisation fouling. Chemical Engineering and Processing: Process Intensification. 2000;39(1):29-43.
40-Jamialahmadi M, Muller-Steinhagen H. A new model for the effect of calcium sulfate scale formation on pool boiling heat transfer. TRANSACTIONS-AMERICAN SOCIETY OF MECHANICAL ENGINEERS JOURNAL OF HEAT TRANSFER. 2004;126(4):507-17.
41-Peyghambarzadeh S, Vatani A, Jamialahmadi M. Application of asymptotic model for the prediction of fouling rate of calcium sulfate under subcooled flow boiling. Applied Thermal Engineering. 2012;39:105-13.
42-Yang Q, Liu Y, Gu A, Ding J, Shen Z. Investigation of induction period and morphology of CaCO3 fouling on heated surface. Chemical Engineering Science. 2002;57(6):921-31.
43-Mayer M, Bucko J, Benzinger W, Dittmeyer R, Augustin W, Scholl S. The impact of crystallization fouling on a microscale heat exchanger. Experimental Thermal and Fluid Science. 2012;40:126-31.
44-Peyghambarzadeh S, Bahrami N. Statistical analysis of calcium sulfate scaling under boiling heat transfer. Applied Thermal Engineering. 2013;53(1):108-13.
45-Ivey H. Relationships between bubble frequency, departure diameter and rise velocity in nucleate boiling. International Journal of Heat and Mass Transfer. 1967;10(8):1023-40.
46-Al-Mutairi N. Fouling studies and control in heat exchangers: MS thesis, Department of Chemical Engineering, College of Engineering, King …; 2007.
47-Cao Z, Wu Z, Abbood S, Sundén B. An analysis of pool boiling heat transfer on nanoparticle-coated surfaces. Energy Procedia. 2019;158:5880-7.
48-Shen G, Ma L, Zhang S, Zhang S, An L. Effect of ultrasonic waves on heat transfer in Al2O3 nanofluid under natural convection and pool boiling. International Journal of Heat and Mass Transfer. 2019;138:516-23.
49-Khooshehchin M, Mohammadidous A, Ghotbinasab S. An optimization study on heat transfer of pool boiling exposed ultrasonic waves and particles addition. International Communications in Heat and Mass Transfer. 2020;114:104558.
50-Hwang W-K, Choy S, Song SL, Lee J, Hwang DS, Lee K-Y. Enhancement of nanofluid stability and critical heat flux in pool boiling with nanocellulose. Carbohydrate polymers. 2019;213:393-402.
51-Kangude P, Srivastava A. Performance of SiO2-water nanofluids for single bubble-based nucleate pool boiling heat transfer. International Journal of Thermal Sciences. 2019;138:612-25.
52-Peyghambarzadeh S, Vatani A, Jamialahmadi M. Experimental study of micro-particle fouling under forced convective heat transfer. Brazilian Journal of Chemical Engineering. 2012;29(4):713-24.