PREDICTOR CONTROL METHOD OF ABSORPTION COLD AND HOT WATER MACHINE

摘要

PURPOSE:To improve heat efficiency greatly by forecasting varying temperature and controlling the number of absorption cold and hot water machines preferentially, and to improve the quality of the control by performing predictor control before the temperature goes beyond a temperature control to be controlled. CONSTITUTION:A system temperature controller 5 calculates a mean load factor QL' required to determine the number of absorption cold and hot water machines to be operated. Then, the temperature controller 5 finds a temperature gradient M on the basis of variation of cold water and hot water detected by a system temperature detector 4. The temperature controller 5 calculates the time (GK-Gj) up to when cold water temperature attains to the lower-limit temperature L1 (=4 deg.C) or upper-limit temperature L2 (=10 deg.C) (lower-limit temperature L1 in this example) of the temperature control range on the basis of the current cold water temperature and temperature gradient M. Lastly, the temperature controller 5 judges whether number of absorption cold and hot water machines is increased or decreased to the number of operation units corresponding to the mean load factor QL' found previously.