Paper No 47 – Effectiveness-based air flow rate optimization for a residential heat pump in seasonal performance conditions – 13th IEA Heat Pump Conference, Jeju, Korea
The conventional rating performance of a residential heat pump system is being replaced by the seasonal performance due to increased demands for the energy saving. In order to achieve the satisfactory seasonal performance, the current system should be modified according to the part load characteristics. Moreover, operating conditions of actuators must be optimized for each test condition to acquire the utmost system efficiency. Fan speeds of both indoor and outdoor units are one of the most significant variable since they are individually controllable and the operating ranges of them are broad. Hence, in this study, effectiveness-based simulation model is introduced to accurately predict the optimum air flow of the system for each seasonal performance condition. The heat exchanger performance is predicted by the modified effectiveness, which can be obtained from the developed non-dimensional correlation. The compressor performance is estimated by the semi-empirical efficiency models. From the verification result, the developed model can estimate the optimum air flow rate within an error of 10% for seasonal performance conditions.