Abstract: An actuator (1) comprises an electric motor (11) for moving an actuated part (2) to an actuated position. The actuator (1) further comprises a controller (10) connected to the electric motor (11) and configured to determine a motor current of the electric motor (11) and to detect motor rotations. The controller (10) is further configured to determine the actuated position by counting the motor rotations detected while the motor current is at or above a current threshold indicative of a load torque, and by not counting motor rotations detected while the motor current is below said current threshold.

Abstract: An antenna extension system for an actuator of a Heating, Ventilation, Air Conditioning, and Cooling (HVAC) system includes a first radio communication module configured for near field communication (NFC) with the actuator over a direct wireless communication link, a second radio communication module having a greater communication range than the first radio communication module, and a gateway module that interconnects the first and second radio communication modules and that receives data from the actuator over the direct wireless communication link via the first radio communication module and transmits the data received from the actuator via the second radio communication module to a mobile communication device, and receives data from the mobile communication device via the second radio communication module and transmits the data received from the mobile communication device via the first radio communication module over the direct wireless communication link to the actuator.

Abstract: For balancing a hydronic network that comprises a plurality of parallel zones with a regulating valve in each zone, individual flow characteristics are determined (S1) for each of the regulating valves, by recording the total flow of fluid measured at different valve positions of a respective regulating valve, while the remaining other regulating valves are set to a closed valve position. Dependent flow characteristics are determined (S2) by recording the total flow of fluid measured at different valve positions of the respective regulating valve, while the remaining other regulating valves are set to an open valve position. Correction factors are determined (S3) for each of the regulating valves, using the individual flow characteristics and the dependent flow characteristics. The hydronic network is balanced (S4) by setting the valve positions of the regulating valves using target flows and the correction factors.

Abstract: A method of detecting an operating condition of a controllable flow regulator in a fluid flow channel of an HVAC system, comprising transmitting a sonic signal, from a sonic transmitter, directly or indirectly to the flow regulator, the sonic signal being distinguished from background noise by being at least one of: (i) modulated according to a modulation schema, (ii) an ultrasonic signal, (iii) a frequency selected to be away from background noise, receiving a signal from a sonic receiver for detecting the transmitted signal after interacting with the flow regulator; and determining, in an electronic signal processor, the operating condition of the flow regulator on the basis of the signal received.

Abstract: A method of controlling a thermal power transfer of a thermal energy exchanger (80) of an HVAC system (1), the method comprising: receiving, by a controller (10), a setpoint thermal power transfer (Power SP); measuring, by a flow sensor (52), a measured flow of fluid (?act) through the thermal energy exchanger (80); determining, by the controller (10), an estimated thermal power transfer (Power EST), using the measured flow of fluid (?act) and a defined flow rate to delta-T mapping; comparing, by the controller (10), the setpoint thermal power transfer (Power SP) and the estimated thermal power transfer (Power EST); and regulating, by the controller (10), the flow (?act) of the fluid (W) through the thermal energy exchanger (80) based on the comparing.

Abstract: A control valve (2) for regulating a fluid flow in an HVAC comprises a valve body (21) and a temperature sensor (25) configured to measure the temperature of a fluid (24) flowing within the control valve (2). The temperature sensor (25) is arranged such that the temperature sensor (25) is essentially thermally decoupled from the valve body (21).

Abstract: The invention relates to method (600) for operating an HVAC system, the method comprising: obtaining (602) a plurality of directly measured parameters from one or more data sources; determining (604) one or more indirectly measured parameter based on one or more of the plurality of directly measured parameters; and monitoring (606) energy flow of the HVAC system, based on the plurality of directly measured parameters and the one or more indirectly measured parameters, wherein the energy flow corresponds to heat transfer between the heat transfer medium and the air. The invention further relates to a an apparatus for operating an HVAC system which comprises means of monitoring an energy flow, based on a plurality of directly measured parameters and one or more indirectly measured parameters.

Abstract: A method of monitoring an air flow in a zone (1) of an HVAC system (10) is described, the zone (1) comprising a supply port (11) and a return port (12), a first flow sensor (111) configured to measure a supply flow (?1) through the supply port (11), and a second flow sensor (121) configured to measure a return flow (?2) through the return port (12), the method comprising: recording by a control system (20, 20?) the supply flow (?1) measured by the first flow sensor (111) and the return flow (?2) measured by the second flow sensor (121); determining by the control system (20, 20?) an infiltration and exfiltration component (?inf/exf), using the supply flow (?1) and the return flow (?2) recorded by the control system (20, 20?); and determining by the control system (20, 20?) an operational sensor state of at least one of the first flow sensor (111) and the second flow sensor (121), using the supply flow (?1), the return flow (?2), and the infiltration and exfiltration component (?inf/exf).

Abstract: For controlling an HVAC component (3), a physical identifier object (5) associated with the HVAC component (3) is arranged in an area (41) with access to a wireless network (6) and at a location distant and separated from the HVAC component (3). Identifier information is obtained from the physical identifier object (5) by a mobile communication device (1) and transmitted via the wireless network (6) to a remote computer system (2). The remote computer system (2) returns HVAC component data linked to the identifier information. The mobile communication device (1) uses the component data for generating a user interface (100) for an HVAC virtual room unit for controlling the HVAC component (3). User commands received via the user interface (100) are transmitted by the mobile communication device (1) via the remote computer system (2) to the HVAC component (3) for controlling the HVAC component (3).

Abstract: An actuator (1) comprises an electric motor (11) for moving an actuated part (2) to an actuated position. The actuator (1) further comprises a controller (10) connected to the electric motor (11) and configured to determine a motor current of the electric motor (11) and to detect motor rotations. The controller (10) is further configured to determine the actuated position by counting the motor rotations detected while the motor current is at or above a current threshold indicative of a load torque, and by not counting motor rotations detected while the motor current is below said current threshold.

Abstract: For monitoring an HVAC system (1), HVAC data reporting messages are received and stored in a cloud-based computer system (4). Each HVAC data reporting message includes one or more operation data values included by an HVAC controller (22) of the HVAC system (1). The cloud-based computer system (4) generates (S73) remote diagnoses for a particular HVAC device, using a plurality of HVAC reporting messages received from a plurality of the HVAC controllers (22) from one or more HVAC systems (1). Each remote diagnosis is generated (S73) by using more than one operational data value, included in HVAC reporting messages received (S71) received from HVAC controllers (22) of more than one HVAC systems (1) and/or from at least two different types of operational data values. A diagnosis message which includes a remote diagnosis is transmitted to a diagnosis processing system for the particular HVAC device.

Abstract: For balancing a hydronic network that comprises a plurality of parallel zones with a regulating valve in each zone, individual flow characteristics are determined (S1) for each of the regulating valves, by recording the total flow of fluid measured at different valve positions of a respective regulating valve, while the remaining other regulating valves are set to a closed valve position. Dependent flow characteristics are determined (S2) by recording the total flow of fluid measured at different valve positions of the respective regulating valve, while the remaining other regulating valves are set to an open valve position. Correction factors are determined (S3) for each of the regulating valves, using the individual flow characteristics and the dependent flow characteristics. The hydronic network is balanced (S4) by setting the valve positions of the regulating valves using target flows and the correction factors.

Abstract: A Heating, Ventilation, Air Conditioning, and Cooling (HVAC) system is provided. The system includes an actuator and a sensor system. The actuator includes an electric motor, a controller connected to the electric motor and a first close range radio communication interface. The sensor system includes one or more sensors, and a second close range radio communication interface. The second close range radio communication interface is connected to the one or more sensors and establishes a local wireless communication link to the actuator via the first close range radio communication interface, and transmits operational values measured by the one or more sensors via the local wireless communication link to the actuator. The controller is connected to the first close range radio communication interface and receives the operational values via the local wireless communication link and controls operation of the actuator's electric motor in accordance with the operational values.

Abstract: A Heating, Ventilation, Air Conditioning, and Cooling (HVAC) system is provided. The system includes an actuator and a sensor system. The actuator includes an electric motor, a controller connected to the electric motor and a first close range radio communication interface. The sensor system includes one or more sensors, and a second close range radio communication interface. The second close range radio communication interface is connected to the one or more sensors and establishes a local wireless communication link to the actuator via the first close range radio communication interface, and transmits operational values measured by the one or more sensors via the local wireless communication link to the actuator. The controller is connected to the first close range radio communication interface and receives the operational values via the local wireless communication link and controls operation of the actuator's electric motor in accordance with the operational values.

Abstract: A method, system (100), and a computer program product comprising a non-transient computer-readable medium (190) having stored thereon computer program code configured to control one or more processors (180) of a computer (170) for operating an HVAC installation (200, 300), wherein a set of enthalpies (H1,i, H2,i, H1,o, H2,o) and flow rates (?1, ?2) as variables of the HVAC installation (200, 300) is monitored and used for controlling the operation of said HVAC installation (200, 300), comprising the steps of: (a) dividing said set of enthalpies (H1,i, H2,i, H1,o, H2,o) and flow rates (?1, ?2) into a first and second subset; (b) measuring each variable of said first subset with a related sensor (110, 120) arranged in said HVAC installation (200, 300); and (c) determining the variables of said second subset from the measured variables of said first subset by using a mathematical and/or empirical relationship between the variables of said first and second subset.

Abstract: A fluid transportation network (1) comprises a plurality of parallel zones (Z1, Z2), fed by a common supply line (L), with a regulating zone valve (V1, V2) in each zone (Z1, Z2) for regulating a flow of fluid (?1, ?2) through the respective zone (Z1, Z2). A processing unit (RE) receives valve positions (pos1, pos2) of the regulating zone valves (V1, V2) and determines and sets an adjusted valve position for a line valve (VE) arranged in the supply line (L), depending on the valve positions (pos1, pos2) of the regulating zone valves (V1, V2). A processing unit (RE) further receives a measurement of a total flow of fluid (?tot) through the supply line (L) and determines and sets adjusted valve positions for the regulating zone valves (V1, V2), depending on the measurement of the total flow of fluid (?tot) through the supply line (L).

Abstract: For controlling an HVAC component (3), a physical identifier object (5) associated with the HVAC component (3) is arranged in an area (41) with access to a wireless network (6) and at a location distant and separated from the HVAC component (3). Identifier information is obtained from the physical identifier object (5) by a mobile communication device (1) and transmitted via the wireless network (6) to a remote computer system (2). The remote computer system (2) returns HVAC component data linked to the identifier information. The mobile communication device (1) uses the component data for generating a user interface (100) for an HVAC virtual room unit for controlling the HVAC component (3). User commands received via the user interface (100) are transmitted by the mobile communication device (1) via the remote computer system (2) to the HVAC component (3) for controlling the HVAC component (3).

Abstract: A hydronic system (HS) that comprises at least one hydronic circuit (HC) and a control (CT) for controlling the operation of said at least one hydronic circuit (HC) via a control path (CP), whereby said control (CT) comprises a feed forward controller (FFC). Operation of the system is improved by the hydronic system (HS) further comprising a control improvement path (CIP) running from the at least one hydronic circuit (HC) to the control (CT). Due to the control improvement path (CIP), the control (CT) can be improved in the case of the hydronic system (HS) becoming instable and/or showing poor system control.

Abstract: A method, system (100), and a computer program product comprising a non-transient computer-readable medium (190) having stored thereon computer program code configured to control one or more processors (180) of a computer (170) for operating an HVAC installation (200, 300), wherein a set of enthalpies (H1,i, H2,i, H1,o, H2,o) and flow rates (?1, ?2) as variables of the HVAC installation (200, 300) is monitored and used for controlling the operation of said HVAC installation (200, 300), comprising the steps of: (a) dividing said set of enthalpies (H1,i, H2,i, H1,o, H2,o) and flow rates (?1, ?2) into a first and second subset; (b) measuring each variable of said first subset with a lo related sensor (110, 120) arranged in said HVAC installation (200, 300); and (c) determining the variables of said second subset from the measured variables of said first subset by using a mathematical and/or empirical relationship between the variables of said first and second subset.

Abstract: A method of monitoring an air flow in a zone (1) of an HVAC system (10) is described, the zone (1) comprising a supply port (11) and a return port (12), a first flow sensor (111) configured to measure a supply flow (?1) through the supply port (11), and a second flow sensor (121) configured to measure a return flow (?2) through the return port (12), the method comprising: recording by a control system (20, 20?) the supply flow (?1) measured by the first flow sensor (111) and the return flow (?2) measured by the second flow sensor (121); determining by the control system (20, 20?) an infiltration and exfiltration component (?inf/exf), using the supply flow (?1) and the return flow (?2) recorded by the control system (20, 20?); and determining by the control system (20, 20?) an operational sensor state of at least one of the first flow sensor (111) and the second flow sensor (121), using the supply flow (?1), the return flow (?2), and the infiltration and exfiltration component (?inf/exf).