Thermal Performance Optimization Of Aluminum Alloy Baseboard Heating Radiator

In this article,the research object is aluminum alloy baseboard heating radiator.Firstly,I established the mathematical model of the radiator,analyzed the heat transfer principle of the radiator.The theoretical calculation of the heat transfer of the tube wall,the equal-section fin and the variable cross-section fin of the radiator is carried out.And thermal performance test of low temperature condition,middle temperature condition and high temperature condition of aluminum alloy baseboard heating radiator and other four types of heat sinks whose radiator market share were relatively high were made on the radiator test bench.The other four kinds of radiators were steel tube column type radiator,grey cast iron column wing type radiator,copper tube aluminum fin radiator and copper and aluminum composite column wing type radiator.Using the results of heat dissipating capacity and metal heat intensity were calculated to compare the heat dissipation performance and economic performance of these five kinds of heat sinks.The quantity of heat of aluminum alloy baseboard heating radiator was simulated at low temperature,middle and high temperature heat dissipation conditions and standard conditions by Fluent software.The amount of heat that is obtained by experiment and the heat dissipating capacity by theoretical calculation is compared with the heat dissipating capacity simulated by Fluent software.It is concluded that the difference between the simulated heat dissipating capacity,the experimental test heat dissipation and the heat dissipating capacity by theoretical calculation is less than 10%.It is concluded that the heat dissipating capacity of Fluent software simulation is reliable in the range of error allowed.And then,through the Thermal stability analysis software and optimization software of Workbench Ansys 14 platform optimized the structure of aluminum alloy baseboard heating radiator.The water pipe radius of the radiator was set as variable parameter.The radiator quality and the convection heat transfer of radiator pipes and hot water were set as the target parameters.Under the conditions of constant velocity of water in the water pipe,through calculating the 100 sample points of the pipe diameter of aluminum alloy baseboard heating radiator,it was concluded that the metal heat strength of radiator was maximum when the pipe diameter was 17.2mm.The optimized heat sink model was established and it was introduced into the Fluent software to simulate the heat dissipation.By comparing simulated heat dissipation and theoretical calculation of heat dissipation,The accuracy of the simulated heat dissipation was verified,and the metal thermal strength of optimized baseboard radiator was calculated,and compares it with the metal thermal strength of unoptimized heat sink.Because of the irregular shape of aluminum alloy baseboard heating radiator,using analogy method to research the two pipe heart distance and the position of water pipe of radiator.The model of aluminum alloy baseboard heating radiator with two water pipes was designed.And under the condition of the pipe diameter of the two radiator model were equal,the optimization of the diameter of the two water pipe was completed,the sizes which could make the metal heat strength of baseboard heating radiator with two water pipes reach the maximum were obtained.The distance from the water pipe below to the bottom of the radiator was 41.6mm,the distance of two pipe heart was 62.7mm,the diameter of the two pipes was 18 mm.The optimized double pipes baseboard heating radiator model was imported into Fluent to simulate the heat dissipation.By comparing simulated heat dissipation and theoretical calculation of heat dissipation,the accuracy of the simulated heat dissipation was verified,and the metal thermal strength of optimized baseboard radiator was calculated,and comparing it with the metal thermal strength of unoptimized radiator and the optimized single tube radiator.The sizes which could make the metal heat strength of baseboard heating radiators with single pipe and double pipes reach the maximum were obtained.