Study on Optimized Integrated Energy-Use Modes of Hospitals Considering TOU Price

摘要

Hospitals are high energy-use consumers. With the rapid development of combined cooling, heating and power (CCHP) and distributed photovoltaic technology, the application of them makes hospitals become energy pro-consumers. Based on analyzing the equipment of energy supply and consumption system, an operational optimization model for a hospital is proposed aiming at minimum energy consumption cost, considering time-of-use (TOU) price. With the proposed model, day-ahead energy optimization is carried out based on the two typical scenarios: typical days of cooling season and heating season. The simulation results show different energy-use modes for the hospitals in different seasons. In this case, there is no need to turn on the gas turbine when the electricity price is low, while the power load is supplied by purchasing electricity from the power grid, and the heating load is satisfied by the gas boiler. When the heating demand is low in the cooling season while the electricity price is high, the waste heat of the gas turbine can meet the heating demand of the absorption chiller for cooling. Although the gas turbine is on in heating season when the electricity price is high, the turbine cannot provide all the heat energy and the gas boiler starts up to provide most of the heat energy.