水产品蒸煮设备中CO_(2)热泵蒸发器仿真试验

Simulation test of CO_(2) heat pump evaporator in aquatic product cooking equipment

为研究水产品蒸煮装备用CO_(2)热泵中蒸发器的性能变化,通过建立CO_(2)热泵Simulink动态仿真模型,并搭建用于水产品蒸煮用CO_(2)热泵试验台,采用仿真计算与试验验证结合的方法,在此水产品蒸煮装备中,控制蒸发温度-5℃~-15℃,研究不同蒸发温度对结霜性能、制热量、热泵系数、压缩比性能参数的影响。结果显示:蒸发温度从-5℃变化到-15℃,结霜速率逐渐增大,在仿真和试验中,热泵蒸煮装备的制热量分别增加0.73 kW、0.70 kW,热泵系数分别降低0.29、0.32,压缩比分别增大0.52、0.50,其中,仿真与试验结果的最大误差率11.79%,最小误差率7.71%,仿真与试验结果吻合度较高。研究表明:在满足水产品加工需求的前提下,为提高加工系统效率,应降低蒸发温度;建立的CO_(2)热泵仿真平台可以较好地仿真水产品蒸煮装备的运行状况,可为CO_(2)热泵在水产品蒸煮的实际应用中提供指导作用。

In order to study the performance change of the evaporator in the CO_(2) heat pump for aquatic product cooking equipment,the Simulink dynamic simulation model of the CO_(2) heat pump was established,and the CO_(2) heat pump test bench for the aquatic product cooking was built.The test method was a combination of simulation calculation and test verification.In this aquatic product cooking equipment,the evaporation temperature was controlled to vary from-5℃to-15℃to study the effects of different evaporation temperatures on frosting performance,heating capacity,heat pump coefficient and compression ratio.The results showed that the frosting rate gradually increased when the evaporation temperature changed from-5℃to-15℃.In the simulation and experiment,the heating capacity of heat pump cooking equipment increased by 0.73 kW and 0.70 kW respectively,the heat pump coefficient decreased by 0.29 and 0.32 respectively,and the compression ratio increased by 0.52 and 0.50 respectively.Among them,the maximum error rate between simulation and experiment was 11.79%,and the minimum error rate was 7.71%.The simulation and experiment are in good agreement.Studies have shown that:on the premise of meeting the demand for aquatic product processing,in order to improve the efficiency of the processing system,the evaporation temperature should be lowered;the CO_(2) heat pump simulation platform established can better simulate the operation status of the aquatic product cooking equipment,and can provide some guidance for practical application of the CO_(2) heat pump to aquatic product cooking.