2017 Volume 34 Issue 1 Pages 1-
In regard to a pre-heating operation for an air-conditioned location (which has a storage heat load), the possibility of energy-saving pre-heating operation was studied in consideration of energy consumed during the pre-heating. The results of the study are summarized as follows. (i) When the storage heat load decreases with time after the air-conditioner is turned on, by using finite-time optimal control instead of the PID control method, it is possible to decrease power consumption and required heating capacity for the pre-heating operation. (ii)According to an example calculation based on a 5-HP packaged air-conditioner used in Shizuoka, Japan, compared to PID control, the finite-time optimal control can decrease pre-heating power consumption and required heating capacity for the pre-heating operation during the heating season by 42%.
