Abstract: An air conditioning system for a building includes an air conditioning unit including one or more powered air conditioning components configured to apply heating or cooling to a refrigerant and an air conditioning controller. The air conditioning controller is configured to cause a determined amount of power to be received at the one or more powered air conditioning components for use in powering the air conditioning unit and control the one or more powered air conditioning components by determining a refrigerant temperature setpoint for the refrigerant or a supply air temperature setpoint for supply air output by the air conditioning system based on the determined amount of power.

Abstract: A heating, ventilation, and/or air conditioning (HVAC) unit includes a first sensor disposed adjacent to an inlet of an evaporator configured to receive an airflow. The HVAC unit includes a second sensor disposed adjacent to an outlet of a reheat coil positioned downstream of the evaporator and configured to expel the airflow. The HVAC unit also includes a controller configured to regulate operation of a modulating reheat valve to adjust flow of a working fluid in thermal communication with the airflow to control a difference between a measurement of the first sensor and a measurement of the second sensor.

Abstract: Disclosed is a screw compressor (100), comprising a screw compressor housing (101), a discharge cavity (113), at least one silencing channel, and at least one adjustment piston, wherein the discharge cavity (113) is defined by at least one part of the screw compressor housing (101); the at least one part of the screw compressor housing (101) defining the discharge cavity (113) forms a wall of the discharge cavity (113); at least one hole is provided in the wall of the discharge cavity (113); the at least one adjustment piston can be inserted into the at least one hole and move therein; the at least one silencing channel is formed by the at least one hole and the at least one adjustment piston, and the at least one silencing channel is in fluid communication with the discharge cavity (113); and the position of the at least one adjustment piston in the at least one hole determines the silencing length of the at least one silencing channel.

Abstract: A method for determining updates in a building management system (BMS) is shown. The method includes receiving, via an on premise server, configuration data associated with at least part of the BMS. The method includes storing the configuration data within a cloud server communicably coupled with the on premise server. The method includes determining, via a difference engine within the cloud server, information comprising a delta between the configuration data and one or more previous sets of configuration data stored within the cloud server. The method includes providing, to the on premise server, the information to an interface.

Abstract: A building management system (BMS) operates a plurality of HVAC devices to affect a physical state or condition and detects a fault condition at a second HVAC device affected by the physical state or condition and having causal relationships with the plurality of HVAC devices such that faulty operation of one or more of the plurality of HVAC devices causes a detectable effect at the second HVAC device. The BMS identifies, based on the fault condition, a predetermined set of system parameters corresponding to the fault condition and comprising a plurality of system parameters of the plurality of HVAC devices that are potential causes of the fault condition. The BMS retrieves operating data for the predetermined set of system parameters and transmits a signal to display a user interface comprising the operating data on a display screen.

Abstract: A thermostat for a building zone includes at least one of a model predictive controller and an equipment controller. The model predictive controller is configured to obtain a cost function that accounts for a cost of operating HVAC equipment during each of a plurality of time steps, use a predictive model to predict a temperature of the building zone during each of the plurality of time steps, and generate temperature setpoints for the building zone for each of the plurality of time steps by optimizing the cost function subject to a constraint on the predicted temperature. The equipment controller is configured to receive the temperature setpoints generated by the model predictive controller and drive the temperature of the building zone toward the temperature setpoints during each of the plurality of time steps by operating the HVAC equipment to provide heating or cooling to the building zone.

Abstract: A conduit support assembly for a heating, ventilation, air conditioning, and/or refrigeration (HVAC&R) system includes a bracket having a base portion and a tab portion. The base portion includes a channel formed therein, the channel is configured to receive a conduit of the HVAC&R system, the tab portion is configured to be inserted through an opening in a panel of the HVAC&R system, and the base portion and the tab portion are configured to cooperatively capture the panel in an installed configuration of the conduit support assembly.

Abstract: A method for operating a temperature control system having a cooling system and ventilation system to vent outside air within a structure is disclosed.

Abstract: A model predictive maintenance (MPM) system for building equipment includes one or more processing circuits having one or more processors and memory. The memory store instructions that, when executed by the one or more processors, cause the one or more processors to perform operations including estimating a degradation state of the building equipment, using a degradation impact model to predict an amount of one or more input resources consumed by the building equipment to produce one or more output resources based on the degradation state of the building equipment, generating a maintenance schedule for the building equipment based on the amount of the one or more input resources predicted by the degradation impact model, and initiating a maintenance activity for the building equipment in accordance with the maintenance schedule.

Abstract: A silencer module for an air handling unit includes a first baffle and a second baffle spaced apart from the first baffle to form an air channel between the first baffle and the second baffle. The air channel is configured to receive a fluid flow and direct the fluid flow through the silencer module. The silencer module also includes a reactive acoustic feature formed in the first baffle. The reactive acoustic feature includes an attenuation profile configured to reduce propagation of tonal acoustic waves through the air channel.

Abstract: A self-orienting sensing system for a heating, ventilation, and air conditioning (HVAC) system includes a housing having a main body. The housing defines a sensing aperture in a first portion of the main body and a mounting channel in a second portion of the main body. The self-orienting sensing system includes a sensing element retained within the housing. The sensing element is configured to detect leaked refrigerant that enters the housing via the sensing aperture. The self-orienting sensing system also includes a mounting retainer configured to extend through the mounting channel and couple the housing to an interior surface of an air handling enclosure of the HVAC system. The mounting retainer enables the mounting channel to rotate about the mounting retainer to automatically align the sensing aperture in a target sensing orientation based on a weight of the housing under the force of gravity.

Abstract: Disclosed herein are an apparatus, method, and computer-readable medium for detecting an anomalous behavior event for an environment and transmitting an alert of the event. An implementation may comprise detecting, in a plurality of image frames captured by a camera, when a person enters a region of interest, tracking movements of the person in the region of interest by comparing images of the person in the plurality of image frames, determining attributes of the person, determining environmental contexts for the region of interest, determining whether or not an anomalous behavior is detected based on the movements and the attributes of the person and the environmental contexts, generating an alert when the anomalous behavior is detected, and transmitting the generated alert to user devices of one or more predetermined recipients.

Abstract: Example implementations include a method, apparatus, and computer-readable medium for controlling access to a location, comprising receiving an access identifier and a biometric information sample from a user attempting to enter an access point. The implementations further include matching the access identifier to an authenticated cluster identifier corresponding to a biometric information cluster within a plurality of different biometric information clusters, wherein the biometric information cluster is associated with an authenticated user. Additionally, the implementations further include identifying, based on a machine learning model processing, a cluster identifier from the biometric information sample.

Abstract: A controller for performing automated system identification. The controller includes processors and non-transitory computer-readable media storing instructions that, when executed by the processors, cause the processors to perform operations including generating a predictive model to predict system dynamics of a space of a building based on environmental condition inputs and including performing an optimization of a cost function of operating building equipment over a time duration to determine a setpoint for the building equipment. The optimization is performed based on the predictive model. The operations include operating the building equipment based on the setpoint to affect a variable state or condition of the space and include monitoring prediction error metrics over time. The operations include, in response to detecting one of the prediction error metrics exceeds a threshold value, updating the predictive model.

Abstract: A device for use in a building management system (BMS) is a controller device. The device includes a base comprising a first processor and a base interface, the first processor being configure to provide control operations for a device in the building system, and a first module installable on and removable from the base. The first module includes a first module interface for receiving power from and communicating with the base via the base interface. In some embodiments, the device includes an optional a second module installable on and removable from the base, the second module comprising a second module interface for receiving power from and communicating with the base via the base interface.

Abstract: A building management system includes (i) one or more building systems including equipment configured to serve one or more spaces in a building and (ii) one or more circuits. The one or more circuits are configured to receive an input to invoke a control strategy to modify a condition of the one or more spaces; define an output of the control strategy where the output relates to a modification that impacts at least one of a location, an equipment type, or a point type; perform a query to identify one or more points associated with the output where the one or more points are defined in terms of at least one of the location, the equipment type, or the point type; and automatically modify one or more values of the one or more points to implement the control strategy.

Abstract: A sensor device including a housing and a number of sensors.

Abstract: An HVAC controller includes one or more processors and one or more non-transitory computer-readable media storing instructions that, when executed by the one or more processors, cause the one or more processors to perform operations comprising determining a filtration efficiency of an air filter located within an air handling unit and positioned to filter a pollutant from an airstream provided to a building zone by the air handling unit, determining an internal generation rate of the pollutant within the building zone, and initiating an automated action based on the filtration efficiency of the air filter within the air handling unit and the internal generation rate of the pollutant within the building zone.

Abstract: A Building Management System (BMS) can include one or more memory devices that can store instructions thereon. The instructions can, when executed by one or more processors, cause the one or more processors to receive a first set of data corresponding to a piece of building equipment for a building, transmit the first set of data to a system to integrate the piece of building equipment with the system, receive a second set of data that includes one or more second values corresponding to second timeseries data associated with the piece of building equipment, detect a difference between one or more first values and the one or more second values that indicates a Change of Value (COV) for at least one parameter associated with the one or more second values, and transmit a third set of data that identifies the COV without a subsequent transmission of the semantic information.

Abstract: A controller for one or more pumps in a central plant is configured to obtain first values of flow rate of a fluid provided by the one or more pumps to a building or campus and corresponding first values of a pressure differential across the building or campus during a first time period, generate a system curve for the building or campus that defines a relationship between the flow rate and the pressure differential using the first values of flow rate and pressure differential during the first time period, predict a second value of the pressure differential across the building or campus during a second time period using the system curve and a second value of the flow rate during the second time period, and operate the one or more pumps to achieve the second value of the pressure differential across the building or campus during the second time period.