The evaluation indexes comparisons were summarised
in Table 5. Though freezers LSJ1500 and LSJ1500A
have the same values of COP and refrigeration capacity,
the values of energy utilization efficiency are different.
This is resulted from the different values of the efficiency
of airflow organisation. Therefore, it is evident that the
performance evaluation indexes can be used to evaluate
the performance, to compare the performance among
different types of freezers, and to diagnose the existing
problems in the freezers.