Experimental Study Of Heat Transfer And Friction Characteristics Of The Multi-region Louver Fin-and-Flat Tube Condenser

The aluminum brazed-heat-exchanger with louvered fin and parallel flow tube was widely used in residential air conditioning system,automotive,aviation, dynamical machine fields due to its high compactness,low weight and low cost. Such as evaporator and condenser on automobile air conditioner,motor engine with augment pressure and vehicle radiator were using louver fin compact exchanger.It's practical to develop a new kind louver fin both with experimental study and numerical investigation on aluminum brazed heat exchanger.In order to obtain full and accurate parameter data about heat exchanger,the experimental study under advanced test facility combining with numerical simulation is the main way mostly used by investigators in the world.In this paper,both configurable and thermal characteristic of heat exchanger on vehicle was presented firstly,the actuality and foreground study on evaporator and condenser was as follow.Heat transfer and flow on heat exchanger were theoretically analyzed.The working principle of performance test facility produced by SATAKE was described too.Finally,experimental study on heat transfer performance of multi-region louver fins with 7 different structural parameters was carried out on a performance of automobile air conditioner test facility.Influence of the fin surface's louver region on heat transfer and flow resistance characteristic was compared and analyzed,in which the louver regions have a strong influence on factors j and f.Simultaneously,the factor(j/f)^1/3 was used to evaluate the enhanced heat transfer effect of the 7 kinds of louver regions fins.At last,Summary the changing rule of the data getting from the test facility.Results show that multi-region louver has the most obvious effect in enhancing heat transfer.A serial of correlations were developed based on previous research result and current data.At the last portion of this paper,all the work had been down was summarized,the way of developing and improving of the multi-region louvered fin heat exchanger is put forward.