Abstract: The present disclosure is directed to a method for managing performance indicators of a number of buildings. The method includes providing a user interface to select at least a first physical premise and a second physical premise to be compared from a plurality of physical premises of an organization. The method includes identifying one or more performance indicators associated with an entity of the organization. The method includes collecting data that associates the first and second physical premises with the one or more performance indicators. The method includes displaying, through the user interface, one or more comparison results of the one or more performance indicators among the first and second physical premises.

Abstract: Systems and methods of generating performance index for connected equipment in a building management system are provided. The connected equipment measures monitored variables and generates status codes. The system obtains data points of the monitored variables and the status codes from past N time units, and connected equipment specific parameters. The system performs first performance checks for the connected equipment using the status codes from the past N time units. The system performs second performance checks using the data points of the monitored variables from the past N time units, the connected equipment specific parameters, and a set of predetermined rules. The system determines individual performance check indicators based on the first performance checks and the second performance checks using first weights each determined based on a different timing. The system generates an overall performance index for the connected equipment using the individual performance check indicators and second weights.

Abstract: A method for a processing circuit to display a graphical user interface (GUI) for a building management system (BMS). The method includes retrieving structured data from a display service executed by the processing circuit, wherein the structured data is a library. The method further includes generating a tag based on the structured data, wherein the tag associates interface data and bound data from a number of different data sources. The interface data describing an arrangement of an element of the GUI, and the bound data describing content of the element. The bound data is associated with the element according to the arrangement. The interface data and bound data are selected by a user. The method further includes displaying, on a display of a client device, the GUI based on the tag. The GUI may be used in different formats by associating the interface data with a different one of bound data, or the bound data with a different one of the interface data.

Abstract: Systems and methods for guided installation of building equipment are provided. A request for a wiring diagram for wiring a first piece of building equipment to a second piece of building equipment is received from a user device. One or more first wiring configurations associated with the first piece of building equipment and one or more second wiring configurations associated with the second piece of building equipment are identified. Based on the one or more first wiring configurations and the one or more second wiring configurations, an equipment-specific wiring configuration for wiring the first piece of building equipment to the second piece of building equipment is automatically selected. A graphical user interface including a wiring diagram illustrating the equipment-specific wiring configuration is provided to the user device.

Abstract: A building system of a building includes one or more memory devices configured to store instructions that, when executed by one or more processors, cause the one or more processors to receive meter data from a meter of the building, the meter data indicating energy usage of a plurality of tenants of the building collectively. The instructions cause the one or more processors to receive variable air volume (VAV) airflow data of a plurality of VAV units indicating environmental conditioning of a plurality of tenant areas associated with the plurality of tenants and determine the energy usage of each of the plurality of tenants individually based on the meter data and the VAV airflow data.

Abstract: A methods and systems for generating rectified signals are disclosed. For example, a system performing the methods includes a current source rectifier which has a plurality of switches configured to receive an input current from an AC voltage source and to receive a plurality of control signals. The switches are configured to produce a rectified output current based on the input current and the control signals. The system also includes a rectifier controller configured to receive a current sense signal indicative of the rectified output current and to generate the control signals based at least in part on the current sense signal, where the control signals cause the current source rectifier to attenuate at least one of a plurality of harmonic frequencies in the rectified output current.

Abstract: A method for classifying an occluded object includes receiving, by one or more processing circuits, an image of the object that is partially occluded by a foreign object and classifying, by the one or more processing circuits, the object of the image into one of one or more classes of interest via an artificial neural network (ANN) by determining a plurality of neuron activations of neurons of the ANN for one or more foreign classes and the one or more classes of interest, subtracting one or more of the neuron activations of the one or more foreign classes from the neuron activations of the one or more classes of interest, wherein the foreign object belongs to one of the one or more foreign classes, and classifying the object of the image into the one of the one or more classes of interest based on the subtracting.

Abstract: A heating, ventilation, and air conditioning system includes an air moving device configured to move air through the HVAC system, a first variable frequency drive (VFD) configured to drive the air moving device, and a second VFD configured to drive the air moving device, wherein the first VFD and the second VFD are configured receive control instructions and to selectively operate based on the control instructions.

Abstract: An HVAC system within a building includes one or more sensors and a thermostat. The thermostat has a processor that is configured to receive air quality information relating to one or more air quality components. The thermostat is further configured to determine a performance level corresponding to each air quality component. The thermostat is further configured to determine one or more parameter values for each air quality component. The thermostat is further configured to generate an icon that visually represents each air quality component.

Abstract: A method in a building access control system includes receiving a first access control event from a sensor indicating a door has been forced open or has been held open for at least a predetermined amount of time, identifying a second access control event associated with the door, determining whether to generate an alarm by evaluating the second access control event relative to the first access control event, and providing the alarm to a user of the access control system responsive to a determination that the alarm should be generated.

Abstract: The present disclosure relates to a heating, ventilation, and air conditioning (HVAC) system that includes a heat exchanger configured to circulate a working fluid therethrough, a valve configured to regulate a flow rate of the working fluid through the heat exchanger, and a valve controller configured to modify a valve position control signal received from an external controller, separate from the valve controller, based on a temperature differential of the working fluid entering and exiting the heat exchanger.

Abstract: A building automation system (BAS) platform includes one or more processors configured to provide an operating environment for developing and executing a plurality of building automation and control microservices. At least one of the plurality of building automation and control microservices is configured to receive live data from remote building equipment and provide control signals to the remote building equipment. The BAS platform further includes one or more application programming interfaces configured to interact with third-party building automation and control applications that run within the operating environment.

Abstract: The present disclosure is directed to a system for a heating, ventilating, and air conditioning (HVAC) system includes a compressor configured to circulate a working fluid through the HVAC system, a fan configured to direct across a heat exchanger coil of the HVAC system, an ambient sensor configured to monitor a condition of an environment surrounding the heat exchanger coil, and a control system communicatively coupled to the ambient sensor, where the control system is configured to detect a status of the ambient sensor, and where the control system is configured to adjust operation of the compressor, or the fan, or both, upon detection of an error of the ambient sensor.

Abstract: A building management system includes a communications bus, field devices connected to the communications bus, a cloud service including a machine learning engine; and a controller for an HVAC device. The controller communicates with the communications bus and the cloud service and is configured to transmit messages through the communications bus to the field devices, compile a list of connected field devices, receive sample data from the connected field devices, and transmit the sample data from the connected field devices to the cloud service. The controller is further configured to receive identifying characteristics for each of the connected field devices from the cloud service and to select a control logic file for the HVAC device based on the identifying characteristics.

Abstract: A Building Management System (BMS) includes a plurality of building subsystems and communications interface. The building subsystems include device(s) for controlling aspect(s) of the building subsystem. The communications interface receives commands from a cloud-based controller and a local client device. The commands from the cloud-based controller and local client device are structured to modify setting(s) for a device of the building subsystems. A BMS controller receives, via the communications interface from the cloud-based controller, a command for modifying a setting of a device for a first building subsystem. The BMS controller identifies a local setting of the device provided by the local client device. The BMS controller identifies a priority of the command from the cloud-based controller in relation to a priority of the local setting. The BMS controller controls the device based on the respective priorities.

Abstract: A method for adjusting an economic balance point in a dual fuel HVAC system includes a furnace, a heat pump and a control system. The method comprises providing a control device having a preprogrammed algorithm for controlling the HVAC system, providing a communication path between the control device and at least one component of the HVAC system, and accessing current fuel cost data; determining an economic balance point temperature based on the current fuel cost data; and updating the economic balance point temperature in the preprogrammed algorithm to adjust an actual balance point of the HVAC system.

Abstract: A building management system includes building equipment operable generate training data relating to behavior of a building system and a controller configured to perform a system identification process that includes generating a prediction error function based on the training data and a system model, generating initial guesses of one or more parameters of the system model, running an optimization problem of the prediction error function for a first group of iterations, discarding, after the first group of iterations, a portion of the initial guesses based on one or more criteria and ranking a remaining portion of the initial guesses, running the optimization problem of the prediction error function for a top-ranked initial guess of the remaining portion to local optimality to identify a first set of values of the one or more parameters, and identifying the one or more parameters as having the first set of values.

Abstract: A building system includes building equipment operable to consume one or more resources and a control system configured to generate, based on a prediction model, predictions of a load on the building equipment or a price of the one or more resources for a plurality of time steps in an optimization period, solve, based on the predictions, an optimization problem to generate control inputs for the equipment that minimize a predicted cost of consuming the resources over the optimization period, control the building equipment to operate in accordance with the control inputs, monitor an error metric that characterizes an error between the predictions and actual values of the at least one of the load on the building equipment or the price of the one or more resources during the optimization period, detect an occurrence of a trigger condition, and in response to detecting the trigger condition, update the prediction model.

Abstract: A controller for a heating, ventilation, and air conditioning (HVAC) system is configured to receive a first feedback from a first sensor of the HVAC system and receive a second feedback from a second sensor of the HVAC system. The controller is configured to determine a saturated parameter corresponding to a working fluid based on the second feedback. Additionally, the controller is configured to transmit an indication in response to determining that the saturated parameter has a threshold correlation to the first feedback.

Abstract: A centrifugal heat pump system includes a steam system with a steam supply, a steam turbine and a steam condenser connected in a steam loop; and a refrigerant system including a first compressor and a second compressor, a refrigerant condenser, and an evaporator connected in a refrigerant loop. The steam turbine includes a rotary drive shaft disposed axially and extending from a first end and a second end of the steam turbine. A sump system collects and redistributes oil or other lubricating fluid. The first compressor is coupled by a first coupling device to the first end of the steam turbine drive shaft and the second compressor is coupled by a second coupling device to the second end of the steam turbine drive shaft. The first and second compressors are connected in parallel in the refrigerant loop and controlled to share a cooling load equally.