PURPOSE:To improve efficiency by predicting power demand and heat demand, in a facility provided with a non-utility generator and a heat recovery unit, and measuring both demands in real time thereby controlling the operating conditions of both units. CONSTITUTION:Power to load L is fed from commercial power WS and power from a generator 1. Exhaust gas from the engine 2 of the generator 1 is subjected to heat exchange 5 with water thus feeding high temperature water to a pipe P, then the heat is recovered 3 and cooling/warming load QL1 is operated through a group of air-conditioners 6, and then heat is radiated 4 to operate a hot water supply load QL2, and the heat is further radiated 14 to cool 13 the engine cooling water 12. A computer 15 predicts power demand and heat demand based on environment conditions such as temperature and atmospheric pressure, determines voltage, current, temperature, flow rate and the like at each section and controls the engine input X and heat recovery Y so that the SC shown by a formula is maximized. SC is an energy save rate, C1 is the cost when no congeneration system CGS is employed, and C2 is the cost when heat and power is fed through CGS.
展开▼
