Abstract:
An actuator comprising an actuating part, a motor arranged to drive the actuating part, a first connection and a second connection, e.g. in the form of communication connections, allowing the actuator to be connected to one or more further components, in such a manner that the actuator is capable of forwarding and/or receiving control signals and/or sensor signals to/from said further component(s). The further components may be valves, such as three way valves. The actuator further comprises a third connection, in the form of an analogue connection, allowing the actuator to receive analogue inputs and/or to transmit analogue outputs.
Abstract:
An actuator comprising an actuating part, a motor arranged to drive the actuating part, a first connection and a second connection, e.g. in the form of communication connections, allowing the actuator to be connected to one or more further components, in such a manner that the actuator is capable of forwarding and/or receiving control signals and/or sensor signals to/from said further component(s). The further components may be valves, such as three way valves. The actuator further comprises a third connection, in the form of an analogue connection, allowing the actuator to receive analogue inputs and/or to transmit analogue outputs.
Abstract:
A residential heat system (1) is described comprising a heat exchanger (2) having a primary side (3) and a secondary side (4), wherein the primary side (3) is connected to a heat source and the secondary side (4) is connected to a heating arrangement, the heating arrangement comprising plural branches (6, 7), each branch (6, 7) having a heat exchanging device (8, 9). Such a residential heating system should minimize heat consumption. To this end a valve arrangement (14) having a flow control valve (16) and a pressure regulating valve (17) keeping constant a pressure difference over the flow control valve (16) is located in a line (15) between the heat exchanger (2) and the branches (6, 7).
Abstract:
The invention relates to a control system (12) for controlling a control valve (16) of a hydrodynamic system (10) using an actuator (14), the hydrodynamic system (10) comprising a heat exchanger (24) with a water inlet (18), a water outlet (20), an air inlet (26), and an air outlet (28), the control system (12) comprising a water inlet temperature sensor (30) that is configured to determine a water inlet temperature value, a water outlet temperature sensor (32) that is configured to determine a water outlet temperature value, and an air inlet temperature sensor (34) that is configured to determine an air inlet temperature value, wherein the control system (12) is configured to determine an alpha value of a characteristic of the hydrodynamic system (10) from the water inlet temperature value, the water outlet temperature value, and the air inlet temperature value; to set an inverse of the alpha value of the characteristic of the hydrodynamic system (10) as an alpha value of a characteristic of the control valve (16) in combination with the actuator (14); and to control the control valve (16) with the actuator (14) using the set alpha value of the characteristic of the control valve (16) in combination with the actuator (14). The invention provides an improved control system (12) and a method for controlling a control valve (16) of a hydrodynamic system (10) using an actuator (14) having an optimal control performance and energy efficiency.