变频空调器最大APF指标的快速求解方法

变频空调能效采用全年性能系数(APF)指标后,空调器的测试工况点由1个增至5个,导致获得空调器最大APF所需的实验量大幅增加。本文提出一种快速求解变频空调最大APF的方法,能够根据一组测试数据,快速求解最大APF,从而简化空调器的实验匹配工作。该方法首先将国家标准中复杂的APF隐式定义转化为简单的APF显式计算公式,作为优化计算的目标函数;根据国家标准规定和空调器结构参数的限制,得到优化计算的约束方程;通过优化计算得到变频空调APF的最大值和对应的5个工况能力能效组合。本文将该方法应用于一款典型的变频空调器中,示意了该方法的操作步骤,优化得到的APF比原始测量值提升了6. 37%。

Quick Prediction of Maximum APF for Inverter Air Conditioners

As annual performance factor (APF) becomes the energy efficiency index of inverter air conditioners, the amount of working conditions to be tested for each air conditioner has greatly increased from one to five, which means that experiment-based maximization of the energy efficiency index may result in too heavy experimental tasks. This studyaims to introduce a method for maximizing the APF of an inverter air conditioner, which can calculate the maximum APF quickly according to a set of testing data. In this method, an APF explicit formula was deduced from complicated and implicit expressions in the Chinese Standards and was taken as the objective function for optimal calculation. Subsequently, the APF constraint equations were deduced according to the Chinese Standard and structural parameters of air conditioners and were taken as constraint conditions. Finally, an optimization algorithm is established for calculating the maximum APF and best combinations of capacity and energy efficiency of five working conditions. Moreover, an application example of a typical inverter air conditioner using the new method was provided, along with the operation steps, andthe value of APF increased by 6.37% in comparison with the originally measured value.