Rating Procedure for Mixed Air-Source Unitary Heat Pumps Operating in the Heating Mode

摘要

A procedure is presented for determining the heating performance ratings of air-source unitary heat pumps consisting of an outdoor section and an indoor section which were not tested together as a system. The procedure allows calculation of capacity at the 47 F rating point and heating seasonal performance factor, HSPF, using as a reference point performance ratings of the outdoor unit tested under current DOE procedures in conjunction with a different indoor section. The procedure requires as input data the matched system rated performance, the ratio of condensing capacities of mixed and matched indoor coils, and the ratio of powers of mixed and matched indoor fans.