Proposal of Algorithm to Reduce Frequencies of Start and Stop and Correction Method of Operation Conditions on Optimum Control of Heating and Cooling Plant with Thermal Storage Tanks

Abstract

We proposed methods to correct the operation conditions of heat source equipments in a heating and cooling plant with thermal storage tanks. The operation conditions of the heat source equipments are ones determined by a practical method using two phase simplex method based on the cooling load predicted at the night before the target day when the optimum control of the plant is planned. One of our proposals is about an algorithm to reduce the frequencies of start and stop of the heat source equipments and to secure their long service life using theory of digital topology. Another one of our proposals is about a method to correct the operation conditions of heat source equipments based on the prediction of the cooling load in the near future; that is, cooling load after thirty minutes. And the last one is to make a new optimum plan to operate the heat source equipments at 4 p.m. again based on the real amount of cold heat existing in the thermal storage tank because the rest of cold heat in the thermal storage tank usually differs considerably from values predicted at the night before the day.