Naslov
A three-dimensional numerical analysis of complete crossflow heat exchangers with conjugate heat transfer

Autori
Perčić, Marko ; Lenić, Kristian ; Trp, Anica

Izvornik
Engineering review : znanstveni časopis za nove tehnologije u strojarstvu, brodogradnji i elektrotehnici (1330-9587) 33 (2013), 1; 23-40

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, izvorni znanstveni rad, znanstveni

Ključne riječi
lamelni izmjenjivači topline ; unakrsni izmjenjivači topline ; numerička analiza ; prijelaz topline
(fin-and-tube heat exchanger ; crossflow heat exchanger ; numerical analysis ; heat transfer ; conjugate heat transfer ; air-side and water-side ; non-constant physical properties)

Sažetak
In this paper, a three dimensional numerical analysis of turbulent fluid flow and heat transfer on the air-side and water-side of plain fin-and-tube heat exchangers is performed in order to obtain their heat transfer characteristics with non-constant physical properties. Besides convection heat transfer on water and air sides, the heat conduction through pipe walls and fins is also considered in the study. The two types of heat exchangers having cascade and in-line flat tube arrangements are presented.. Heat exchangers have been numerically simulated for different inlet air temperatures and velocities. As crossflow has been taken into account, the heat exchangers have been modeled with all fins considering the temperature changes on both sides. Numerical values are compared to the results obtained by analytical calculations of the heat exchangers, and good agreement of results is derived. The heat transfer characteristics are observed to be better for the heat exchanger with cascade tube arrangement for all of the analyzed conditions.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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