摘要：Operating in part-load conditions significantly affects the energy
efficiency of the air-to-water heat pumps. The currently used method
of testing the devices does not provide the necessary data for estimating the
degradation of the device’s efficiency in part-load operating mode. The
value of the degradation coefficient Cc = 0.9 adopted in accordance with the
EN 14825 standard is generally used. However, this value often does not
reflect the actual degree of the COP reduction. Hence the new quasidynamic
model and the calculation approach to the degradation coefficient
were proposed. The model reflects the real and overall reduction between
the full and part-load COP, not only the energy consumption in the standby
mode. The estimation was made using the field measurement data of the
air-to-water heat pump supplying heat to the low temperature installation.
It has been proved that the determination of the main parameter is possible
using a relatively small amount of data without losing an accuracy.
其他摘要：Operating in part-load conditions significantly affects the energy efficiency of the air-to-water heat pumps. The currently used method of testing the devices does not provide the necessary data for estimating the degradation of the device’s efficiency in part-load operating mode. The value of the degradation coefficient Cc = 0.9 adopted in accordance with the EN 14825 standard is generally used. However, this value often does not reflect the actual degree of the COP reduction. Hence the new quasi-dynamic model and the calculation approach to the degradation coefficient were proposed. The model reflects the real and overall reduction between the full and part-load COP, not only the energy consumption in the stand-by mode. The estimation was made using the field measurement data of the air-to-water heat pump supplying heat to the low temperature installation. It has been proved that the determination of the main parameter is possible using a relatively small amount of data without losing an accuracy.
