DEVICE AND METHOD FOR CONTROLLING OPENING OF A VALVE IN AN HVAC SYSTEM

摘要

For controlling the opening of a valve (10) in an HVAC system (100) to regulate the flow φ of a fluid through a thermal energy exchanger (2) of the HVAC system (100) and adjust the amount of energy E exchanged by the thermal energy exchanger (2), determined are the flow φ through a valve (10) and the temperature difference ΔT=Tin−Tout between the supply temperature Tin of the fluid entering the thermal energy exchanger (2) and the return temperature Tout of the fluid exiting the thermal energy exchanger (2). The opening of the valve (10) is controlled depending on the flow φ and the temperature difference ΔT. For example, the opening of the valve (10) is controlled depending on a control criterion c=f(φ,ΔT), calculated from the flow φ and the temperature difference ΔT.

主权项

1. A method of controlling opening of a valve (10) in an HVAC system (100) to regulate the flow φ of a fluid through a thermal energy exchanger (2) of the HVAC system (100) and adjust the amount of energy E exchanged by the thermal energy exchanger (2), the method comprising:
measuring (S311) the flow φ through the valve (10); determining (S312) a temperature difference ΔT=Tin−Tout between a supply temperature Tin of the fluid entering the thermal energy exchanger (2) and a return temperature Tout of the fluid exiting the thermal energy exchanger (2); calculating a control criterion c=f(φ,ΔT) using the flow φ and the temperature difference ΔT=Tin−Tout and a function ƒ(φ,ΔT) that requires an increase of the value of the flow φ with an increase of the value of the temperature difference ΔT=Tin−Tout for the control criterion c to remain constant; and controlling (S32) the opening of the valve (10) depending on a comparison of the control criterion c=f(φ,ΔT) to a threshold value.