FINNED HEAT-EXCHANGER .1. GENERAL AND FUN DAMENTAL-ASPECTS

This paper is a review of the main literature studies about the finned heat exchangers modelling and simulation. The aspects concerning air circulation through the heat exchanger component tubes are studied, as well as those involved in the thermal transfer from technological flu id to wall or from fin to air. A particular attention is devoted to th e finned heat exchangers physical and mathematical, respectively, comp lete models, as well as to the calculation criterial relationship of t he coefficient for the partial thermal transfer to air, alpha(2), fin efficiency, eta(a), and friction coefficient, f. Details are also give n about the influence the contact thermal resistance has upon the finn ed heat exchangers performance. This study is a useful tool for a corr ect technological sizing of this heat exchanger type.