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 componend tubes are studied, as well as those involved in the thrmal transfer from technological flui d to walt or from fin to air. A particular attention is devoted to the finned heat exchangers physical and mathematical respectively, comple te models, as well as to the calculation criterical relationship of th e coefficient for the partial thermal transfer to air, alpha(2) fin ef ficiency, eta(a) and friction coefficient, f. Details are also given a bout the influence the cantact thermal resistance has upon the finned heat exchangers performance. This study is a useful tool for a correct technological sizing of this heat exchanger type.