Naslov
Entropijska analiza sotočnih prenosnikov toplote
(Entropy Analysis of Parallel-Flow Heat Exchangers)

Autori
Galović, Antun ; Živić, Marija ; Andrassy, Mladen

Izvornik
Strojniški vestnik (0039-2480) 49 (2003), 2; 100-110

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
prenosnik toplote; povečanje entropije; učinkovitost; reštive analitične
(heat exchangers; entropy generation; effectiveness; analytical solution)

Sažetak
The entropy generation in a parallel-flow recuperative heat exchanger is analysed in this paper. During the operation of a heat exchanger, generally two sources of entropy generation normally exist: the pressure drop (friction) source and the heat-exchange source. Here, only the heat-exchange source is considered. The analysis is performed using an analytical mathematical model and the same non-dimensional numbers that were introduced into the energy analysis of heat exchangers by Bošnjaković, many years ago. The influence of the individual non-dimensional variables (the operating points of the parallel-flow heat exchanger) on the entropy generation is quantified. The results are presented non-dimensionally in diagrams, which gives them a more universal meaning. Special conditions, i.e. the boundary operating conditions, of the parallel-flow recuperator, which are identical to those for counter-flow and cross-flow exchangers, are also discussed.

Izvorni jezik
Slv-eng

Znanstvena područja
Strojarstvo

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