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 flow control device for an HVAC fluid transportation system includes a sensor module and a logic module. The sensor module includes a flow measurement system to be connected with a flow tube and measures a volumetric flow of a fluid through the flow tube. The sensor module further includes a first electronic circuit connected electrically to the flow measurement system. The logic module is connected to the sensor module and includes a control signal output terminal and a second electronic circuit connected to the first electronic circuit. The second electronic circuit generates and applies on the control signal output terminal an actuator control signal, using the volumetric flow of the fluid measured by the flow measurement system, for an actuator, arranged outside the flow tube of the flow control device, to actuate a valve of the HVAC fluid transportation system.

Abstract: A flow control device (1) for an HVAC fluid transportation system comprises a flow tube (10) formed in one piece, a flow measurement system (11) integrated with the flow tube (10) and configured to measure a volumetric flow of fluid (?) through the flow tube (10), and an electronic circuit (12) arranged in a fixed fashion on the flow tube (10) and connected electrically to the flow measurement system (11). The flow control device (1) further comprises a control signal output terminal (13) attached to the flow tube (10) and connected to the electronic circuit (12). The electronic circuit (12) is configured to generate and apply on the control signal output terminal (13) an actuator control signal, using the volumetric flow of fluid (?) measured by the flow measurement system (11), for an actuator actuating a valve of the HVAC fluid transportation system (2) arranged outside the flow tube (10) of the flow control device (1).

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: HVAC system for a building with a control, including a model containing representations of HVAC devices and control devices, assignments between the representations of HVAC devices and control devices, and representations of fluid control devices and sensor devices. A configuring section can: cause one of several fluid control devices to vary a fluid control parameter; determine a variation of a sensor parameter at one of several sensor devices caused by variation of the fluid control parameter; compare the determined sensor device with the model to detect the representation of sensor device(s) corresponding to the sensor device determined; assign the sensor device determined to one of the control devices corresponding to a representation of control devices assigned to the representation of the sensor device corresponding to the sensor device determined and/or assigned to the representation of the fluid control device for which the fluid control parameter has been varied.

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: An HVAC actuator (1) comprises an electric motor (11); an energy buffer (13) configured to store electrical energy from a power supply (2), and to provide the electrical energy to the motor (11); and a power limiting circuit (12) configured to limit input power from the power supply (2) to the energy buffer (13) to a threshold lower than motor power drawn by the motor (11) from the energy buffer (13).

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 flow control device (1) for an HVAC fluid transportation system comprises a flow tube (10) formed in one piece, a flow measurement system (11) integrated with the flow tube (10) and configured to measure a volumetric flow of fluid (?) through the flow tube (10), and an electronic circuit (12) arranged in a fixed fashion on the flow tube (10) and connected electrically to the flow measurement system (11). The flow control device (1) further comprises a control signal output terminal (13) attached to the flow tube (10) and connected to the electronic circuit (12). The electronic circuit (12) is configured to generate and apply on the control signal output terminal (13) an actuator control signal, using the volumetric flow of fluid (?) measured by the flow measurement system (11), for an actuator actuating a valve of the HVAC fluid transportation system (2) arranged outside the flow tube (10) of the flow control device (1).

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).

Abstract: HVAC system for a building with a control, including a model containing representations of HVAC devices and control devices, assignments between the representations of HVAC devices and control devices, and representations of fluid control devices and sensor devices. A configuring section can: cause one of several fluid control devices to vary a fluid control parameter; determine a variation of a sensor parameter at one of several sensor devices caused by variation of the fluid control parameter; compare the determined sensor device with the model to detect the representation of sensor device(s) corresponding to the sensor device determined; assign the sensor device determined to one of the control devices corresponding to a representation of control devices assigned to the representation of the sensor device corresponding to the sensor device determined and/or assigned to the representation of the fluid control device for which the fluid control parameter has been varied.

Abstract: An HVAC actuator (1) comprises an electric motor (11); an energy buffer (13) configured to store electrical energy from a power supply (2), and to provide the electrical energy to the motor (11); and a power limiting circuit (12) configured to limit input power from the power supply (2) to the energy buffer (13) to a threshold lower than motor power drawn by the motor (11) from the energy buffer (13).

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 mobile communication device (2) comprises a mobile radio communication module, configured for data communication in a mobile radio communication network, and a close range radio communication module, configured to establish a local communication link (43) to an actuator (3) via a close range radio communication interface (33) that is connected to the actuator (3) and located in communication range of the close range radio communication module. The mobile communication device (2) further comprises a processing unit connected to the mobile radio communication module and the close range radio communication module (23), and configured to exchange location-specific data with a remote data server (8) via the mobile radio communication network, the contents of the location-specific data being dependent on identification information associated with the local communication link (43) to the actuator (3).

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: To balance (S3) a group of consumers in a fluid transport system in which each consumer is provided with a motorized control valve for regulating the flow through the consumer, characteristic data for the consumers is stored (S2) which determines a valve position of the relevant control valve for target flows through one of the consumers in each case. A current total flow through the group of consumers is determined by means of a common flow sensor (S32) and a balance factor (S34) is defined on the basis of the current total flow and a sum of the desired target flows through the consumers. The consumers are dynamically balanced by setting (S31) the valve settings for the corresponding control valves on the basis of the characteristic data and the balance factor.