Design And Research On An Air Low Temperature Drying Cycle System

The paper has put forward a kind of drying system because of high drying temperature,highenergy consumption and high water consumption. It needs to solve the problem that we should ensurenot burning the clothes under the premise of the maximum to reduce the energy consumption andwater consumption.In the paper, the air cycle drying system was studied and designed. the conventional electricheating drying system, the air cycle low temperature drying system with expander and air fan and theair cycle low temperature drying system with throttle valve and air fan were calculated byprogramming, the results showed that for the conventional electric heating drying system, the totalenergy consumption would reach0.9139kW and the drying temperature was93.85℃;While the totalenergy consumption of the air cycle low temperature drying system with expander and air fan was0.8985kW, its drying temperature would reach54.53℃. Comparatively speaking, the total energyconsumption of the two systems would be the same, and the latter drying temperature would reduceby41.8%. Eventually, the total energy consumption of the air cycle low temperature drying systemwith throttle and air fan was0.7372kW, its drying temperature would reach56.27℃.The paper analysised the influence of key parameters on the system performance. The resultsshowed that for the air flow rate40kg/h, along with the increase of the efficiency of the compressor,condensing rate would be increased from0.9336kg/h to1.105kg/h, and the drying time would bedecreased from224.9min to190.1min. Along with the increase of the efficiency of the expander, thesystem condensing rate would increase, but for the efficiency of the compressor, the impact ofamplitude would be more obvious, and the drying time would be decreased from207.7min to197.4min. In addition, with the increase of the system air flow and the fan air flow, system condensingrate would be obviously increased.In addition, in the paper, based on the calculation of each major component selection, theexperiment was built, and for both high temperature program and low temperature program, the dataof experimental and theoretical were compared. The results showed that there would be somedeviations, but the difference was not big. The heat loss flowing through the pipe would not beconsidered in the design process theoretically, while in the actual experiment, the heat loss was exit.Finally, the exergy loss of air cycle drying system with throttle was researched. The resultsshowed that the exergy loss of throttle, electric heater and drum was a little large, occupying a total exergy loss of75.8%. In addition, with the improvement of the compressor efficiency, the exergyefficiency of the system increased from4.004%to5.052%. When the drum outlet temperaturereached53℃, the exergy efficiency of the system increased to10.85%.