Application And Study Of The Parallel Flow Condenser In Small Refrigeration Systems

As is a new compact and efficient heat exchange, at present the parallel flow condenser has been a kind of automobile air-conditioning conditioner, refrigeration equipment and marine systems. It not only gives us to reduce the economic costs, but also at the same time meets our requirement for the internal appropriate temperature environment. A new condenser can keep up with the trend of the social and economic development. At the recent years the condenser structures gradually from the traditional segment, duct tape condensers to the development of parallel flow condenser in the different areas and the different working conditions of the heat transfer characteristics when laws of their respective show different characteristics. At the same time of substance in the refrigerant replacement directly accelerated the evolution process of rapid development. On the air side structure of the parallel flow condenser in fin form not only selected the effective louver structure to improve the heat transfer performance, but also in refrigerant “CEBIAN” tube form selection of small hydraulic diameter of porous section non-circular structure, greatly strengthen the two aspects of heat transfer, and for the heat transfer coefficient, weight, structural characteristics and obtain unit refrigerating capacity refrigerant filling quantity and so on comprehensive effectively improves the heat exchange.These study of the parallel flow condenser provide great development value and market prospect.The improvement of the performance of the condenser and the reducing of the cost for the operation of the refrigeration system and the production cost control is of great significance.Aiming at the production of the model 6900 Y model of Xiamen golden dragon company in the same working conditions, numerical simulation design of parallel flow condenser and tube plate condenser both condenser. Compare two condenser in the theory of demand the same refrigerating capacity under the condition of heat transfer, momentum consumption and cop performance index, according to the condensation heat transfer experiment, the analysis of choosing different refrigerant tubular structure influence on the overall heat transfer performance.A small circular aperture structure of flat tube heat transfer performance of heat exchanger than parallel pipe structure for hot up 2.5%~5.8% and analysis of parallel flow condenser parameters of flat tube at the same time, by changing the parameters of flat tube structure, set up different contrast test, analysis of flat tube parameters and the refrigerant heat transfer coefficient and pressure drop characteristics. Through the data research, it shows that in the small aperture flattube fixed height of each holehti change the flat tube hole width parameters on heat transfer and pressure drop is affected, and in every hole in the small aperture flat tube fixed height wti,change the flat tube hole relative height parameters affect the heat transfer and pressure drop is larger, so meet the increase in the thermal efficiency and lower pressure drop, to select a suitable sluice or hole width to height ratio and flat tube hydraulic diameter must be flat tube can maximize structure refrigeration effect. According to the reasonable numerical simulation method, this paper constructs the code-named A1, A2, A3 the flat tube with different parameters of parallel flow condenser, through multiple sets of condenser contrast experiment, statistics of experimental data and simulation data, and comparing the results, finally determine the code A2 flat tube parameters of the model of parallel flow condenser, is the best choice of the model of the condenser.