Naslov
Free convection heat looses in a flat plate solar collector

Autori
Lenić, Kristian ; Franković, Bernard

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Zbornik radova Međunarodnog kongresa Energija i okoliš 2002, Opatija, Vol. I. / Franković Bernard - Rijeka : Hrvatski savez za sunčevu energiju, 2002, 101-114

Skup
Energija i okoliš 2002

Mjesto i datum
Opatija, Hrvatska, 23.10.2002. - 25.10.2002

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
free convection heat looses; solar collector; finite volume method; heat losses; Rayleigh number; local and average Nusselt number

Sažetak
In the paper the free convection heat looses inside closed air container with isothermal non-uniform boundary condition has been analysed numerically. The mathematical model based on Oberbeck mathematical model of boundary layer has been defined. This model has been used to solve the two-dimensional transient heat transfer problem. Fields of relevant thermodynamic dimensions&#8217 ; characteristics, such as velocity vectors, stream function and temperature gradient have been calculated using finite volume numerical method. A computer solver for transient two-dimensional heat transfer has been developed. The influence of Rayleigh number on different flow and heat convection regimes has been analysed for different inclination angles. An impact of different flow regimes on heat convection has been also analysed using local and average Nusselt numbers. Results have been applied to prediction of free convection heat losses in an approximated model of solar collector for different inclination angles.

Izvorni jezik
Engleski

Znanstvena područja
Temeljne tehničke znanosti

POVEZANOST RADA