Abstract: A controller for building equipment that operate to provide heating or cooling for a building or campus. The controller includes a processing circuit configured to perform an optimization of an objective function subject to an override constraint to determine amounts of one or more resources to be produced by the building equipment and control the building equipment to produce the amounts of the one or more resources determined by performing the optimization subject to the override constraint. The override constraint overrides an output of the optimization by specifying an override amount of a first resource of the one or more resources to be produced by a first subset of the building equipment.

Abstract: A method in a Building Management System (BMS) includes presenting a user interface to a user on a user device that allows the user to efficiently view logical relationships between objects in the BMS. The method includes presenting, on the user interface, a first object and a second object. The second object is affected by the first object. The first object is presented on a first side of the second object on the user interface. The method also includes receiving, via the user interface, an input from the user including a selection of the second object, and presenting, on the user interface, a third object used to control equipment of the BMS in response to the input from the user. The third object is affected by the second object and presented on a second side of the second object opposite the first side.

Abstract: A controller for a building including 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. The operations include parsing a computer-aided design (CAD) file or a building information model (BIM) file for the building to identify building equipment that operates to affect a variable state or condition of a zone of the building. The operations include generating one or more zone models describing one or more control relationships between the building equipment and the variable state or condition of the zone based on the CAD file or the BIM file. The operations include using the one or more zone models to perform a model-based operation for the building equipment.

Abstract: A building cooling system includes one or more cooling devices operable to affect an indoor air temperature of a building and a system management circuit. The system management circuit is configured to obtain an objective function that includes a power consumption term and a comfort term, perform an optimization of the objective function over a time horizon to determine values of the cooling capacity of the cooling devices where each value of the cooling capacity corresponds to a time step of the time horizon, and control the cooling devices based on the values of the cooling capacity of the cooling devices. The comfort term of the objective function a difference between a prediction of the indoor air temperature of the building and a temperature setpoint for the building, while the power consumption term is a function of the power consumption of the one or more cooling devices.

Abstract: A heating, ventilation, and/or air conditioning (HVAC) system has a refrigerant circuit that includes a compressor, a condenser system with a first set of tubes and a second set of tubes fluidly separate from the first set of tubes within the condenser system, and a valve positioned downstream of the compressor and upstream of the second set of tubes relative to a direction of refrigerant flow through the refrigerant circuit, in which the refrigerant circuit is configured to direct refrigerant through the first set of tubes and through the second set of tubes. The HVAC system further has a switch configured to detect an operating parameter and to instruct the valve to close based on the operating parameter such that refrigerant flow is blocked through the second set of tubes and refrigerant flow is enabled through the first set of tubes.

Abstract: The present disclosure relates to a network-based centralized security monitoring (CSM) system. An example CSM includes one or more memory devices configured to store instructions thereon that, when executed by one or more processors, cause the one or more processors to receive a plurality of parameter data elements comprising one or more characters for a plurality of parameter types from a monitored site, determine for each of the plurality of parameter types a number of occurrences of a plurality of different character groups in the plurality of parameter data elements, generate a count structure indicating the number of occurrences of the plurality of different character groups in the plurality of parameter data elements for each of the plurality of parameter types, and generate a security signature for the monitored site, the security signature comprising the count structure for each of the plurality of parameter types.

Abstract: A building energy system includes a controller configured to obtain representative loads and rates for a plurality of scenarios and generate a cost function comprising a risk attribute and multiple demand charges. Each of the demand charges corresponds to a demand charge period and defines a cost based on a maximum amount of at least one of the energy resources purchased within the corresponding demand charge period. The controller is configured to determine, for each of the multiple demand charges, a peak demand target for the corresponding demand charge period by performing a first optimization of the risk attribute over the plurality of the scenarios, allocate an amount of the one or more energy resources to be consumed, produced, stored, or discharged by the building equipment by performing a second optimization subject to one or more constraints based on the peak demand target for each of the multiple demand charges.

Abstract: The techniques described herein provide systems and methods for controlling climate characteristics in a building. The control system of a climate management system may calculate a default airflow rate for each zone in the building based on a minimum permitted airflow rate of climate control equipment, a maximum permitted airflow rate of the climate control equipment, and the number of zones serviced by the climate control equipment. The control system may also adjust the default airflow rate for a zone to a customized airflow rate based on a user input. The control system may adjust the default airflow rate to the customized airflow rate if the customized airflow rate is greater than or equal to the minimum permitted airflow rate. The control system may adjust the default airflow rate to the minimum permitted airflow rate if the customized airflow rate is less than the minimum permitted airflow rate.

Abstract: A building management system includes HVAC equipment operable to affect an indoor air temperature of a building, a system manager configured to obtain a cost function that characterizes a cost of operating the HVAC equipment, obtain a dataset relating to the building, determine a current state of the building by applying the dataset to a neural network, select a temperature bound associated with the current state, augment the cost function to include a penalty term that increases the cost when the indoor air temperature violates the temperature bound, and determine a temperature setpoint for each of a plurality of time steps in the future time period. The temperature setpoints achieve a target value of the cost function over the future time period. The building management system also includes a controller configured to operate the HVAC equipment to drive the indoor air temperature towards the temperature setpoint.

Abstract: A system for monitoring and controlling flow rate of a fluid through a valve, the system including a flow rate sensor configured to measure the flow rate of the fluid through the valve, and a controller in communication with the flow rate sensor. The controller is configured to receive the measured flow rate from the flow rate sensor and determine if the measured flow rate is equal to a predetermined flow rate value. In response to determining equality, the controller is configured to determine a minimum valve position threshold (xmin), and determine a minimum flow rate threshold (ymin) corresponding to xmin. The controller is further configured to calculate a corrected flow rate (?f) using xmin, ymin, and an indication of valve position (v). Additionally, the controller is configured to control a valve operation using the corrected flow rate (?f).

Abstract: The present disclosure relates to a bracket for stacking heating, ventilation, and/or air conditioning (HVAC) units. The bracket includes a corner portion having a first raised section and an alignment protrusion that extends from the corner portion. The bracket also includes a first arm extending from the corner portion, where the first arm includes a second raised section at a first end of the first arm, and where a first strap recess is formed between the first raised section and the second raised section. The bracket further includes a second arm extending from the corner portion, where the second arm includes a third raised section at a second end of the second arm, and where a second strap recess is formed between the first raised section and the third raised section.

Abstract: A fiber optic flow sensor includes a fiber optic cable, a light emitter, an optical power meter, and a processing circuit. The fiber optic cable allows light to enter a first end of the fiber optic cable, reflect off a second end of the fiber optic cable and exit the fiber optic cable through the first end. The fiber optic cable is at least partially exposed to fluid flow at the second end. The light emitter emits light at an input power into the first end of the fiber optic cable. The optical power meter measures an output power of the light exiting the fiber optic cable at the first end. The processing circuit calculates a flow rate of the flow of fluid based on the input power of light entering the fiber optic cable and the output power of light exiting the first end of the fiber optic cable.

Abstract: A valve assembly is provided. The valve assembly includes a valve body having a valve chamber and a plurality of ports into the valve chamber. The plurality of ports include a first port, a second port, and a third port. The first port and the second port are aligned with a common axis and located on opposite sides of the valve chamber. The system further includes a valve member located within the valve chamber. The valve member is a rotatable ball having a fluid passage that extends through the ball and includes an opening at the end of the ball. The fluid passage is substantially oval-shaped when viewed at the opening in a direction parallel to the fluid passage. The valve assembly further includes a valve stem that is coupled to a valve member and has a first end that extends from the valve body.

Abstract: A building cooling system includes a controller and a cooling device operable to affect indoor air temperature of a building. The controller is configured to obtain a cost function that characterizes a cost of operating the cooling device over a future time period, obtain a dataset relating to the building, determine a current state of the building by applying the dataset to a neural network, select a temperature bound associated with the current state, augment the cost function to include a penalty term that increases the cost when the indoor air temperature violates the temperature bound, and determine a temperature setpoint for each of a plurality of time steps in the future time period. The temperature setpoints achieve a target value of the cost function over the future time period. The controller is configured to control the cooling device to drive the indoor air temperature towards the temperature setpoint.

Abstract: A thermostat for a conditioned space includes a sensor that measures a value of a performance variable of the conditioned space, a user interface that receives a setpoint value from a user and displays information to the user, and a controller. The controller receives values of the performance variable from the sensor over a time period, stores the values of the performance variable, receives the setpoint value from the user interface, and determines a value of a manipulated variable based on the setpoint value and the values of the performance variable. The controller is configured to adjust an operation of HVAC equipment that affect the conditioned space based on the value of the manipulated variable. The controller is configured to determine a smoothed value of the performance variable based on the values of the performance variable and cause the user interface to display the smoothed value.

Abstract: A system for preventing a false alarm that occurs at a building, the system includes a processing circuit configured to receive, via a communications interface, building data including events for the building devices. The processing circuit is configured to determine, based on the events, whether a false alarm rule has triggered, where the false alarm rule indicates relationships between one or more of the events that is indicative of a situation at the building site that causes the false alarm, generate a parameter update for at least one of the plurality of building devices in response to determining that the false alarm rule has triggered, and implement the parameter update by providing, via the communications interface, the parameter update to the at least one of the building devices.

Abstract: A controller for equipment that operate to provide heating or cooling to a building or campus includes a processing circuit configured to obtain utility rate data indicating a price of resources consumed by the equipment to serve energy loads of the building or campus, obtain an objective function that expresses a total monetary cost of operating the equipment over an optimization period as a function of the utility rate data and an amount of the resources consumed by the equipment, determine a relationship between resource consumption and load production of the equipment, optimize the objective function over the optimization subject to a constraint based on the relationship between the resource consumption and the load production of the equipment to determine a distribution of the load production across the equipment, and operate the equipment to achieve the distribution.

Abstract: A controller for heating, ventilation, or air conditioning (HVAC) equipment includes a communications interface configured to communicate with first HVAC equipment and second HVAC equipment and a processing circuit communicably coupled to the communications interface. The processing circuit is configured to detect a staging event for the first HVAC equipment occurring at a first time, obtain a delay time based on an estimated amount of time required to reach steady state after the staging event for the first HVAC equipment occurs at the first time, determine whether the delay time has elapsed since the staging event for the first HVAC equipment has occurred, and prevent the second HVAC equipment from staging in response to a determination that the delay time has not elapsed since the staging event for the first HVAC equipment has occurred.

Abstract: A refrigerant gas sensing system of a heating, ventilating, and air conditioning (HVAC) system, wherein the refrigerant gas sensing system is configured to collect a sample from a monitored gas volume, to introduce an ignition source to the sample, to detect an amount of combustion product in the sample after ignition, to determine an amount of leaked refrigerant in the monitored gas volume based on the measured amount of combustion product, and to indicate the amount of leaked refrigerant in the monitored gas volume.

Abstract: A heating system, includes a furnace that is configured to heat air to be provided to a conditioned space, a pressure sensor configured to collect sensor data indicative of a pressure of air within the furnace; a fan configured to supply the heated air to the conditioned space, and a motor configured to drive the fan. Additionally, the heating system includes processing circuitry communicatively coupled to the pressure sensor and the motor. The processing circuitry is configured to control the motor based upon the sensor data such that an amount of airflow supplied to the conditioned space is constantly supplied by the fan.