پیوندهای مفید
آمار
| تعداد نشریات | 21 |
| تعداد شماره‌ها | 610 |
| تعداد مقالات | 9,028 |
| تعداد مشاهده مقاله | 67,082,875 |
| تعداد دریافت فایل اصل مقاله | 7,656,353 |
Hydro-Thermal Performance Evaluation of Nanofluids Flow in Double Pipe Heat Exchanger: Effects of Inner Pipe Cross Section, Circular or Cam-Shaped | ||
| Journal of Heat and Mass Transfer Research | ||
| دوره 8، شماره 2 - شماره پیاپی 16، بهمن 2021، صفحه 283-299 اصل مقاله (1.42 M) | ||
| نوع مقاله: Full Length Research Article | ||
| شناسه دیجیتال (DOI): 10.22075/jhmtr.2021.22159.1327 | ||
| نویسندگان | ||
| Aso Rezaei؛ Zahra Baniamerian* | ||
| Department of Mechanical Engineering, Tafresh University, Tafresh, Iran | ||
| تاریخ دریافت: 30 دی 1399، تاریخ بازنگری: 04 تیر 1400، تاریخ پذیرش: 07 تیر 1400 | ||
| چکیده | ||
| This study investigates numerically the hydro-thermal behavior of nanofluids in double-pipe heat exchangers with two different cross-sections using four different nanofluids. Two types of different circular and cam-shaped cross-sections, four types of different nanofluid of various concentrations are assessed. The results show that cam-shaped cross-section has reduced the heat transfer rate and the pressure drop compared to the circular cross-section. The heat transfer rate has been increased in both types of heat exchanger by increasing the concentration of nanoparticles, but the pressure drop and friction coefficient has been increased compared to pure water. The results of investigating energy ratio show that the highest performance evaluation criterion (PEC) is related to the silver nanoparticles and the energy ratio (PR) increases by increasing the percentage of nanoparticle concentration. But the energy ratio has been decreased for other nanoparticles by increasing the volume percentage of nanoparticles. The results of thermal and hydraulic studies show that the highest PR value is related to water/TiO2 nanofluid and cam pipes have a higher energy loss. Maximum heat transfer improvement for circular pipes is 26.74% related to Ag nanoparticles while this value is 21.15% for cam-shaped pipes. | ||
| کلیدواژه‌ها | ||
| Double-pipe heat exchanger؛ Cam-shape cross-section؛ Nanofluid؛ Heat transfer coefficient؛ Pressure drop؛ Energy ratio (PEC and PR) | ||
| عنوان مقاله [English] | ||
| بررسی هیدرو حرارتی نانوسیالات در مبدلهای حرارتی دولوله ای : اثر تغییر مقطع دایروی به بادامکی | ||
| چکیده [English] | ||
| این مطالعه به بررسی عددی انتقال حرارت ، افت فشار، کارایی و نسبت انرژی (PEC ) در مبدلهای دولوله-ای با دو سطح مقطع متفاوت و با استفاده از چهار نانوسیال مختلف می‌پردازد. اثرات پارامترهای سطح مقطع (دایره‌ای و بادامکی برای لوله‌ی داخلی)، چهار نوع نانوسیال مختلف، نرخ جریان گرم و سرد و غلظت نانوذرات مورد بررسی قرار گرفته است. نتایج نشان می‌دهد که تغییر سطح مقطع باعث کاهش نرخ انتقال حرارت و کاهش افت فشارنسبت به سطح مقطع دایره‌ای گردیده است. هچنین با افزایش غلظت نانوذرات میزان انتقال حرارت در هر دو نوع مبدل افزایش پیدا کرده ولی افت فشار و ضریب اصطکاک نیز نسبت به آب خالص افزایش یافته است. بالاترین PEC مربوط به نانوذره‌ی نقره می باشد و در این نانوذره با افزایش درصد غلظت نانوذرات نسبت انرژی افزایش می‌یابد. ولی برای دیگر نانوذرات با افزایش درصد حجمی نانوذرات نسبت انرژی کاهش یافته است. بالاترین مقدار PR مربوط نانو سیال آب / TiO2 می‌باشد. هنگام استفاده از لوله‌ی بادامک شکل عدد ناسلت کمتر از عدد ناسلت لوله‌ی دایروی می‌باشد، که باعث کم بودن نسبت انرژی گردیده و نشان می‌دهد لوله‌های بادامکی افت انرژی بیشتری دارند. همچنین در مبدل حرارتی دو لوله‌ای نرخ انتقال گرما هنگام استفاده از نانوسیالات آب /CuO، آب / Ag، آب/TiO2 و آب Al2O3 به ترتیب 16.2%، 26.74%، 12.48% و 11.62% درصد نسبت به آب خالص افزایش پیدا کرده است. در مبدل حرارتی دو لوله‌ای لوله بادامکی نرخ انتقال حرارت برای نانوسیالات آب /CuO و آب / Ag، آب/TiO2 و آب Al2O3 به ترتیب 16.25%، 21.15%، 13 و 12.55% افزایش داشته اند، ولی نرخ انتقال حرارت در مبدل لوله بادامکی نسبت به مبدل لوله دایروی کاهش داشته است. همچنین افزایش افت فشار و کارایی مبدل در مبدلهای دایروی و بادامکی به ترتیب 68.5% ، 15.41% و 39.42% ، 23.3% نسبت به آب خالص افزایش داشته است. از دو نرم‌افزار Aspen EDR و Fluent برای شبیه‌سازی این دو مبدل استفاده گردیده است. | ||
| کلیدواژه‌ها [English] | ||
| مبدل دو لوله‌ای, لوله بادامکی, نانوسیال, ضریب انتقال حرارت, افت فشار, نسبت انرژی | ||
| مراجع | ||
|
[1] Manasrah, A.D., Al-Mubaiyedh, U.A., Laui, T., Ben-Mansour, R., Al-Marri, M.J., Almanassra, I.W., Abdala, A. and Atieh, M.A., 2016. Heat transfer enhancement of nanofluids using iron nanoparticles decorated carbon nanotubes. Applied Thermal Engineering, 107, pp.1008-1018.
[2] Dondapati, R.S., Saini, V., Verma, K.N. and Usurumarti, P.R., 2017. Computational prediction of pressure drop and heat transfer with cryogen based nanofluids to be used in micro-heat exchangers. International Journal of Mechanical Sciences, 130, pp.133-142.
[3] Kakac, S., Liu, H. and Pramuanjaroenkij, A., 2002. Heat exchangers: selection, rating, and thermal design. CRC press.
[4] Maxwell, James Clerk. A treatise on electricity and magnetism. Vol. 1. Clarendon press, 1881.
[5] Akhtari, M., Haghshenasfard, M. and Talaie, M.R., 2013. Numerical and experimental investigation of heat transfer of α-Al2O3/water nanofluid in double pipe and shell and tube heat exchangers. Numerical Heat Transfer, Part A: Applications, 63(12), pp.941-958.
[6] Choi, S.U. and Eastman, J.A., 1995. Enhancing thermal conductivity of fluids with nanoparticles (No. ANL/MSD/CP-84938; CONF-951135-29). Argonne National Lab., IL (United States).
[7] Choi, S.U. and Eastman, J.A., 1995. Enhancing thermal conductivity of fluids with nanoparticles (No. ANL/MSD/CP-84938; CONF-951135-29). Argonne National Lab., IL (United States).
[8] Wang, X., Xu, X. and Choi, S.U., 1999. Thermal conductivity of nanoparticle-fluid mixture. Journal of thermophysics and heat transfer, 13(4), pp.474-480.
[9] Lee, S., Choi, S.S., Li, S.A. and Eastman, J.A., 1999. Measuring thermal conductivity of fluids containing oxide nanoparticles.
[10] Kumar, N. and Sonawane, S.S., 2016. Experimental study of Fe2O3/water and Fe2O3/ethylene glycol nanofluid heat transfer enhancement in a shell and tube heat exchanger.International Communications in Heat and Mass Transfer, 78, pp.277-284.
[11] Tirandaz, N., Dehghan, M. and Valipour, M.S., 2017. Heat and fluid flow through a helical annulus enhanced by a porous material: A perturbation study. Applied Thermal Engineering, 112, pp.1566-1574.
[12] Tajik Jamal-Abad, M., Dehghan, M., Saedodin, S., Valipour, M.S. and Zamzamian, A., 2014. An experimental investigation of rheological characteristics of non-Newtonian nanofluids. Journal of Heat and Mass Transfer Research, 1(1), pp.17-23.
[13] Raei, B., 2020. Statistical analysis of nanofluid heat transfer in a heat exchanger using Taguchi method. Journal of Heat and Mass Transfer Research.
[14] Parvar, M., Saedodin, S. and Rostamian, S.H., 2020. Experimental study on the thermal conductivity and viscosity of transformer oil-based nanofluid containing ZnO nanoparticles. Journal of Heat and Mass Transfer Research, 7(1), pp.77-84.
[15] Gholy Nejad, P.M., Solaimany Nazar, A.R., Rahimi Ahar, Z. and Rajati, H., 2019. Investigation on turbulent nanofluid flow in helical tube in tube heat exchangers. Journal of Heat and Mass Transfer Research, 6(1), pp.31-39.
[16] YadollhiFarsani, R., Raisi, A. and Ahmadi Nadooshan, A., 2019. Experimental Investigation of the Alumina/Paraffin Thermal Conductivity Nanofluids with a New Correlated Equation on Effective Thermal Conductivity. Journal of Heat and Mass Transfer Research, 6(2), pp.85-93.
[17] Bayat, H., Lavasani, A.M. and Maarefdoost, T., 2014. Experimental study of thermal–hydraulic performance of cam-shaped tube bundle with staggered arrangement. Energy conversion and management, 85, pp.470-476.
[18] Nouri-Borujerdi, A. and Lavasani, A.M., 2007. Experimental study of forced convection heat transfer from a cam shaped tube in cross flows. International Journal of Heat and Mass Transfer, 50(13-14), pp.2605-2611.
[19] Lavasani, A.M.A. and Bayat, H., 2012. Heat transfer from two cam shaped cylinders in side-by-side arrangement. International Journal of Mechanical and Mechatronics Engineering, 6(7), pp.1298-1301.
[20] Lavasani, A.M.A. and Bayat, H., 2012. Heat transfer from two cam shaped cylinders in side-by-side arrangement. International Journal of Mechanical and Mechatronics Engineering, 6(7), pp.1298-1301.
[21] Nouri-Borujerdi, A. and Lavasani, A.M., 2008. Pressure loss and heat transfer characterization of a cam-shaped cylinder at different orientations. Journal of heat transfer, 130(12).
[22] Lavasani, A.M. and Bayat, H., 2016. Numerical study of pressure drop and heat transfer from circular and cam-shaped tube bank in cross-flow of nanofluid. Energy Conversion and Management, 129, pp.319-328.
[23] Arya, H., Sarafraz, M.M., Pourmehran, O. and Arjomandi, M., 2019. Heat transfer and pressure drop characteristics of MgO nanofluid in a double pipe heat exchanger. Heat and Mass Transfer, 55(6), pp.1769-1781.
[24] Mund, A., Pattanayak, B., Jayakumar, J.S., Parashar, K. and Parashar, S.K.S., 2019. Experimental and Numerical Study of Heat Transfer in Double-Pipe Heat Exchanger Using Al 2 O 3, and TiO 2 Water Nanofluid. In Advances in Fluid and Thermal Engineering (pp. 531-540). Springer, Singapore.
[25] Bahmani, M.H., Sheikhzadeh, G., Zarringhalam, M., Akbari, O.A., Alrashed, A.A., Shabani, G.A.S. and Goodarzi, M., 2018. Investigation of turbulent heat transfer and nanofluid flow in a double pipe heat exchanger. Advanced Powder Technology, 29(2), pp.273-282.
[26] Esfe, M.H., Saedodin, S. and Mahmoodi, M., 2014. Experimental studies on the convective heat transfer performance and thermophysical properties of MgO–water nanofluid under turbulent flow. Experimental thermal and fluid science, 52, pp.68-78.
[27] Chun, B.H., Kang, H.U. and Kim, S.H., 2008. Effect of alumina nanoparticles in the fluid on heat transfer in double-pipe heat exchanger system. Korean Journal of Chemical Engineering, 25(5), pp.966-971.
[28] Aziz, A., Jamshed, W. and Aziz, T., 2018. Mathematical model for thermal and entropy analysis of thermal solar collectors by using Maxwell nanofluids with slip conditions, thermal radiation and variable thermal conductivity. Open Physics, 16(1), pp.123-136.
[29] Sobamowo, M.G., Yinusa, A.A. and Oluwo, A.A., 2018. Slip analysis of magnetohydrodynamics flow of an upper- convected Maxwell viscoelastic nanofluid in a permeable channel embedded in a porous medium. Aeron Aero Open Access J, 2(5), pp.310-318.
[30] Mellal, M., Benzeguir, R., Sahel, D. and Ameur, H., 2017. Hydro-thermal shell-side performance evaluation of a shell and tube heat exchanger under different baffle arrangement and orientation. International Journal of Thermal Sciences, 121, pp.138-149. | ||
|
آمار تعداد مشاهده مقاله: 514 تعداد دریافت فایل اصل مقاله: 331 |
||