Đánh giá hiệu suất của bộ trao đổi nhiệt dạng ống và vỏ hoạt động với nanofluids dựa trên oxit

Heat and Mass Transfer - Tập 52 - Trang 1425-1433 - 2015
I. M. Shahrul1, I. M. Mahbubul1, R. Saidur2, S. S. Khaleduzzaman1, M. F. M. Sabri1
1Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
2Center of Research Excellence in Renewable Energy (CoRE-RE), King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia

Tóm tắt

Nghiên cứu này liên quan đến việc đánh giá hiệu suất của bộ trao đổi nhiệt dạng ống và vỏ được vận hành với nanofluids. Độ dẫn nhiệt, độ nhớt và mật độ của các nanofluids đã tăng lên, nhưng nhiệt dung riêng của các nanofluids đã giảm khi nồng độ hạt gia tăng. Hệ số truyền nhiệt đối lưu được tìm thấy cao hơn từ 2–15% so với nước ở lưu lượng 50 kg/phút cho cả hai bên chất lỏng. Tuy nhiên, hiệu quả năng lượng đã cải thiện khoảng 23–52% cho các nanofluids đã đề cập ở trên. Bởi vì, hiệu quả năng lượng (ɛ) phụ thuộc mạnh vào mật độ và nhiệt dung riêng của các chất lỏng hoạt động nên giá trị tối đa của ɛ đã đạt được cho nanofluid ZnO–W và giá trị thấp nhất được tìm thấy cho nanofluid SiO2–W.

Từ khóa

#bộ trao đổi nhiệt #nanofluids #hiệu suất #hiệu quả năng lượng #nhiệt dung riêng

Tài liệu tham khảo

Choi S (1995) Enhancing thermal conductivity of fluids with nanoparticles. In: Siginer DA, Wang HP (eds) Developments applications of non-newtonian flows, FED-vol 231/MD-vol 66. ASME, New York, pp 99–105 LotfizadehDehkordi B et al (2013) Investigation of viscosity and thermal conductivity of alumina nanofluids with addition of SDBS. Heat Mass Transf 49(8):1109–1115 Mahbubul IM, Saidur R, Amalina MA (2012) Latest developments on the viscosity of nanofluids. Int J Heat Mass Transf 55(4):874–885 Sundar LS et al (2013) Experimental thermal conductivity of ethylene glycol and water mixture based low volume concentration of Al2O3 and CuO nanofluids. Int Commun Heat Mass Transf 41:41–46 Rizvi I et al (2013) Mathematical modelling of thermal conductivity for nanofluid considering interfacial nano-layer. Heat Mass Transf 49(4):595–600 Keblinski P, Eastman JA, Cahill DG (2005) Nanofluids for thermal transport. Mater Today 8(6):36–44 Mahbubul IM, Saidur R, Amalina MA (2013) Thermal conductivity, viscosity and density of R141b refrigerant based nanofluid. Proced Eng 56:310–315. doi:10.1016/j.proeng.2013.03.124 Vasheghani M et al (2011) Effect of Al2O3 phases on the enhancement of thermal conductivity and viscosity of nanofluids in engine oil. Heat Mass Transf 47(11):1401–1405 Pandey SD, Nema VK (2012) Experimental analysis of heat transfer and friction factor of nanofluid as a coolant in a corrugated plate heat exchanger. Exp Thermal Fluid Sci 38:248–256 Zhou S-Q, Ni R (2008) Measurement of the specific heat capacity of water-based Al2O3 nanofluid. Appl Phys Lett 92(9):093123 Shahrul IM et al (2014) Effectiveness study of a shell and tube heat exchanger operated with nanofluids at different mass flow rates. Numer Heat Transf Part A Appl 65(7):699–713 Namburu PK et al (2009) Numerical study of turbulent flow and heat transfer characteristics of nanofluids considering variable properties. Int J Therm Sci 48(2):290–302 Vakili M, Mohebbi A, Hashemipour H (2013) Experimental study on convective heat transfer of TiO2 nanofluids. Heat Mass Transf 49(8):1159–1165 Heris SZ, Esfahany MN, Etemad SG (2007) Experimental investigation of convective heat transfer of Al2O3/water nanofluid in circular tube. Int J Heat Fluid Flow 28(2):203–210 Hajmohammadi MR et al (2015) Effects of Cu and Ag nano-particles on flow and heat transfer from permeable surfaces. Adv Powder Technol 26:193–199 Hajmohammadi MR et al (2013) A new configuration of bend tubes for compound optimization of heat and fluid flow. Energy 62:418–424 Hajmohammadi M, Nourazar SS, Campo A (2014) Analytical solution for two-phase flow between two rotating cylinders filled with power law liquid and a micro layer of gas. J Mech Sci Technol 28(5):1849–1854 Hajmohammadi MR, Nourazar SS (2014) On the insertion of a thin gas layer in micro cylindrical Couette flows involving power-law liquids. Int J Heat Mass Transf 75:97–108 Hojjat M et al (2011) Laminar convective heat transfer of non-Newtonian nanofluids with constant wall temperature. Heat Mass Transf 47(2):203–209 Suresh S, Chandrasekar M, Selvakumar P (2012) Experimental studies on heat transfer and friction factor characteristics of CuO/water nanofluid under laminar flow in a helically dimpled tube. Heat Mass Transf 48(4):683–694 Elias MM et al (2014) Effect of different nanoparticle shapes on shell and tube heat exchanger using different baffle angles and operated with nanofluid. Int J Heat Mass Transf 70:289–297 Farajollahi B, Etemad SG, Hojjat M (2010) Heat transfer of nanofluids in a shell and tube heat exchanger. Int J Heat Mass Transf 53(1–3):12–17 Lotfi R, Rashidi AM, Amrollahi A (2012) Experimental study on the heat transfer enhancement of MWNT-water nanofluid in a shell and tube heat exchanger. Int Commun Heat Mass Transf 39(1):108–111 BHD., S.E.S. HIS Shell & Tube Heat Exchanger (Model: HE 668). 2011 17/06/2011; 17/06/2011. http://www.solution.com.my/pdf/HE668(A4).pdf Hajmohammadi MR, Nourazar SS (2014) On the solution of characteristic value problems arising in linear stability analysis; semi analytical approach. Appl Math Comput 239:126–132 Sarkar J (2011) A critical review on convective heat transfer correlations of nanofluids. Renew Sustain Energy Rev 15(6):3271–3277 Gafiychuk VV et al (2011) ZnO nanoparticles produced by reactive laser ablation. Appl Surf Sci 257(20):8396–8401 Sundar LS et al (2012) Effect of full length twisted tape inserts on heat transfer and friction factor enhancement with Fe3O4 magnetic nanofluid inside a plain tube: an experimental study. Int J Heat Mass Transf 55(11–12):2761–2768 Kamyar A, Saidur R, Hasanuzzaman M (2012) Application of computational fluid dynamics (CFD) for nanofluids. Int J Heat Mass Transf 55(15–16):4104–4115 Vajjha RS, Das DK (2009) Specific heat measurement of three nanofluids and development of new correlations. ASME J Heat Transf 131(7):071601 Incropera FP et al (2007) Fundamentals of heat and mass transfer, 6th edn. Wiley, New Jersey Leong KY et al (2012) Modeling of shell and tube heat recovery exchanger operated with nanofluid based coolants. Int J Heat Mass Transf 55(4):808–816 Kakac S, Pramuanjaroenkij A, Liu H (2012) Heat exchangers: selection, rating, and thermal design, 3rd edn. CRC Press, FL Shah RK, Sekulic DP (2003) Fundamentals of heat exchanger design. Wiley, New Jersey Xuan Y, Roetzel W (2000) Conceptions for heat transfer correlation of nanofluids. Int J Heat Mass Transf 43(19):3701–3707 Pak BC, Cho YI (1998) Hydrodynamic and heat transfer study of dispersed fluids with submicron metallic oxide particles. Exp Heat Transf 11(2):151–170 Brinkman H (1952) The viscosity of concentrated suspensions and solutions. J Chem Phys 20:571 Leong KC, Yang C, Murshed SMS (2006) A model for the thermal conductivity of nanofluids—the effect of interfacial layer. J Nanopart Res 8(2):245–254 Einstein A, Fürth R (1956) Investigations on the theory of Brownian movement. Dover Publications, New York Teng T-P et al (2010) The effect of alumina/water nanofluid particle size on thermal conductivity. Appl Therm Eng 30(14–15):2213–2218 Ghozatloo A, Rashidi A, Shariaty-Niassar M (2014) Convective heat transfer enhancement of graphene nanofluids in shell and tube heat exchanger. Exp Thermal Fluid Sci 53:136–141 Nasiri M, Etemad SG, Bagheri R (2011) Experimental heat transfer of nanofluid through an annular duct. Int Commun Heat Mass Transf 38(7):958–963 Elias MM et al (2013) Effect of nanoparticle shape on the heat transfer and thermodynamic performance of a shell and tube heat exchanger. Int Commun Heat Mass Transf 44:93–99 Leong KY et al (2012) Heat transfer and entropy analysis of three different types of heat exchangers operated with nanofluids. Int Commun Heat Mass Transf 39(6):838–843 Shahrul IM et al (2014) Global effects of MWCNT-W nanofluid in a shell & tube heat exchanger. Adv Mater Res 832:154–159 Shahrul IM et al (2014) Energy and environmental effects of shell and tube heat exchanger by using nanofluid as a coolant. J Chem Eng Jpn 47(4):340–344 Hajmohammadi MR et al (2013) New methods to cope with temperature elevations in heated segments of flat plates cooled by boundary layer flow. Therm Sci 00:159 Bejan A, Sciubba E (1992) The optimal spacing of parallel plates cooled by forced convection. Int J Heat Mass Transf 35(12):3259–3264 Hajmohammadi MR et al (2013) Improvement of forced convection cooling due to the attachment of heat sources to a conducting thick plate. J Heat Transf 135(12):124504