Central heating temperature control algorithm for systems with condensing boilers

The problem of control of a central heating system in a small residence is considered. It is assumed that the system is based on a condensing boiler. Since the boiler efficiency depends on a returning water temperature, the proposed control goal is to provide proper air temperature in the residence as well as the lowest possible water temperature. The proposed algorithm is applied to two buildings. Both of them have the same heating energy requirements, but the heat capacity of their walls differs. The presented simulation study shows reduction of energy consumption compared to that yielded by the traditional control algorithms.