Mogućnosti korišćenja dvofaznih mešavina sa fazno promenljivim materijalima sa primenom u sistemima za hlađenje
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Apstrakt
U radu je prikazana numericka analaiza upotrebe dvofazne mesavine fazno promenljivih materijala i vode kao fluida sa primenom u sistemima za hladjenje. Mikrokanali sa odnosom precnika Di / Do = 0.3 / 0.5 mm i duzinom od L = 10 cm su korisceni kao toplotni sistemi sa laminarnim rezimom strujanja i konstantnim toplotnim fluksom na spoljasnjem zidu kanala. Oktadekan je koriscen kao fazno-promenljivi materijal a voda kao osnovni fluid. Rezultati dobijeni za faznopromenljive materijale su poredjeni sa onima dobijeni za vodu. Analiziran je uticaj temperaturskog intervala promene faze na toplotne performanse mikrokanala u odnosu na konstantan Reynoldsov broj ili konstantnu pogonsku snagu fluida. Rezultati su pokazali da je kriterijum na osnovu kojeg se vrsi poredjenje kljucan za ocenjivanje toplotnih performansi. Za slucaj koriscenja fluida sa fazno promenljivim materijalima, temperatura zida cevi je niza cak i za kostantne vrednosti pogonske snage fluida. Sa druge strane, sto je manji temperaturski interval promene faza to je manja i temperatura zida cevi.
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Reference
[2] W. Wua, H. Bostanci, L.C. Chow, Y. Hong, C.M. Wang, M. Sub, J.P. Kizito, Heat transfer enhancement of PAO in microchannel heat exchanger using nano-encapsulated phase change indium particles, International Journal of Heat and Mass Transfer (2013), 58, 348 – 355.
[3] S. Song, W. Shen, J. Wang, S. Wang, J. Xu, Experimental study on laminar convective heat transfer of microencapsulated phase change material slurry using liquid metal with low melting point as carrying fluid, International Journal of Heat and Mass Transfer (2014), 73, 21 – 28.
[4] S. K. Roy, B. L. Avanic, Laminar forced convection heat transfer with phase change material suspensions, International Communications in Heat and Mass Transfer (2001), 28(7), 895-904.
[5] M. Goel, S. K. Roy, S. Senguptas, Laminar forced convection heat transfer in microcap-sulated phase change material suspensions, International Journal of Heat and Mass Transfer (1994) 37(4), 593-604.
[6] S. Song, Q. Liao, W. Shen, Laminar heat transfer and friction characteristics of micro-encapsulated phase change material slurry in a circular tube with twisted tape inserts, Applied Thermal Engineering (2013), 50, 791-798.
[7] R. Sabbah, M. M. Farid, S. Al-Hallaj, Micro-channel heat sink with slurry of water with micro-encapsulated phase change material: 3D-numerical study, Applied Thermal Engineering (2008), 29, 445 – 454.
[8] Z.W. Ma, P. Zhang, Modeling the heat transfer characteristics of flow melting of phase
change material slurries in the circular tubes, International Journal of Heat and Mass Transfer (2013), 64, 874 – 881.
[9] X. Hu, Y. Zhang, Novel insight and numerical analysis of convective heat transfer en-hancement with microencapsulated phase change material slurries: laminar flow in a cir-cular tube with constant heat flux, International Journal of Heat and Mass Transfer (2002), 45, 3163 – 3172.
[10] S. Song, Q. Liao, W. Shen, Y. Ruan, J. Xu, Numerical study on laminar convective heat transfer enhancement of microencapsulated phase change material slurry using liq-uid metal with low melting point ascarrying fluid, International Journal of Heat and Mass Transfer (2013), 62, 286 – 294.
[11] S.V. Patankar, Numerical Heat Transfer and Fluid Flow, CRC-Press, New York, 1980.
[12] J.C. Maxwell, A Treatise on Electricity and Magnetism, Oxford University Press, 1881.