Abstract: A flow control device is configured to control fluid flow in an HVAC system. The flow control device includes a valve, an actuator configured to open and close the valve, and one or more sensors. The flow control device further includes a fault detection and correction agent configured to receive data from the one or more sensors, analyze the data according to a set of rules, and detect whether one or more faults have occurred. In response to detecting a fault, the fault detection and correction agent is configured to either operate the actuator to open or close the valve or initiate a corrective action to be taken by another device in the HVAC system.

Abstract: A condenser and evaporator system includes (i) a condenser system positioned to receive a gaseous refrigerant from a compressor system and configured to condense the gaseous refrigerant into a liquid refrigerant, (ii) a controlled pressure receiver (CPR) positioned to receive and store the liquid refrigerant, (iii) an evaporator system including a conduit, an expansion valve, and a fan, and (iv) a controller. The conduit is positioned to receive the liquid refrigerant from the CPR. The expansion valve is positioned between the CPR and the conduit, and configured to facilitate modulating an amount of the liquid refrigerant that flows into the conduit from the CPR. The fan is positioned to facilitate providing a cooling operation to an arca associated with the evaporator system through evaporation of the liquid refrigerant flowing through the conduit.

Abstract: A controller for a space controls a plurality of devices, where each device is associated with one of a plurality of different building domains. The controller includes one or more processors operably coupled to one or more computer-readable storage media and configured to execute instructions stored in the computer-readable storage media to determine a plurality of use cases defined for the space, each use case associated with a required set of building domains, determine, for each of the different building domains, whether devices of building equipment are operational to serve the space, determine a set of enabled use cases by, for each use case, enabling the use case if devices of building equipment are operational to serve the space for each building domain in the required set of the different building domains and control the plurality of devices in accordance with the set of enabled use cases.

Abstract: A thermostat for transmitting data wirelessly to a controller in a building includes a temperature sensor, a processing circuit, and a wireless radio. The processing circuit is configured to receive a measured temperature value from the temperature sensor, determine a current temperature error based on the current measured temperature value and a setpoint temperature, and determine whether a difference between the current temperature error and a previous temperature error is greater than an error threshold. The processing circuit is configured to determine whether a minimum amount of time has passed since transmitting a previous measured temperature value and transmit the current measured temperature value to the controller via the wireless transmitter in response to determining that both the difference between the current temperature error and the previous temperature error is greater than the error threshold and the minimum amount of time has passed since transmitting a temperature value.

Abstract: Embodiments of the present disclosure are directed to a heat exchange device that includes a condenser configured to receive a refrigerant, an evaporator having an evaporation tube bundle, a throttling device configured to receive a first portion of the refrigerant from the condenser and to expand the first portion of the refrigerant before directing the first portion to the evaporator, and an ejector having a high pressure conduit, a low pressure conduit, and an outlet conduit, the ejector is configured to receive the first portion from the throttling device or a second portion of the refrigerant from the condenser via the high pressure conduit, receive a third portion of the refrigerant from the evaporator via the low pressure conduit, mix the first portion or the second portion with the third portion to form a mixed refrigerant, and direct the mixed refrigerant to the evaporator via the outlet conduit.

Abstract: A refrigeration system includes a free cooling system having an air-cooled heat exchanger, where the air-cooled heat exchanger includes a fan configured to move air over coils of the air-cooled heat exchanger to remove heat from a coolant flowing through the air-cooled heat exchanger, and a mechanical cooling system with a refrigerant loop that includes an evaporator, a compressor, and a condenser disposed along the refrigerant loop, where the compressor is configured to circulate a refrigerant through the refrigerant loop, and wherein the evaporator is configured to receive the coolant and transfer heat from the coolant to the refrigerant. The refrigeration system also includes a controller configured to adjust a fan speed of the fan up to a threshold fan speed, to initiate operation of the compressor when the fan speed reaches the threshold fan speed, wherein the fan speed and a compressor speed of the compressor are based at least on an ambient air temperature and a cooling load demand.

Abstract: A heating, ventilating, and air conditioning (HVAC) system includes an HVAC unit. The HVAC unit includes an enclosure having a panel disposed in a corresponding opening of the enclosure. The HVAC unit also includes a heat exchanger disposed within an interior of enclosure. Moreover, the HVAC unit includes an electromagnetic lock fixed to a surface of the interior of the enclosure. The electromagnetic lock is configured to retain the panel in a closed position relative to the enclosure.

Abstract: A building energy system includes equipment and an asset allocator configured to determine an optimal allocation of energy loads across the equipment over a prediction horizon. The asset allocator generates several potential scenarios and generates an individual cost function for each potential scenario. Each potential scenario includes a predicted load required by the building and predicted prices for input resources. Each individual cost function includes a cost of purchasing the input resources from utility suppliers. The asset allocator generates a resource balance constraint and solves an optimization problem to determine the optimal allocation of the energy loads across the equipment. Solving the optimization problem includes optimizing an overall cost function that includes a weighted sum of individual cost functions for each potential scenario subject to the resource balance constraint for each potential scenario.

Abstract: A method for updating heating, ventilation, or air conditioning (HVAC) devices is provided. The method includes receiving an update package at a first HVAC device of a plurality of HVAC devices via a network. The update package includes an identification of a plurality of device models and a plurality of software updates. The method includes determining that a device model for the first HVAC device is identified by the update package and in response to a determination that the device model for the first HVAC device is identified by the update package, extracting a first software update corresponding to the device model for the first HVAC device from the update package and installing the first software update on the first HVAC device. The method includes transmitting the first update package to a second HVAC device of the plurality of HVAC devices via the network.

Abstract: An energy optimization system for a building includes a processing circuit configured to provide a first bid including one or more first participation hours and a first load reduction amount for each of the one or more first participation hours to a computing system. The processing circuit is configured to operate one or more pieces of building equipment based on one or more first equipment loads and receive one or more awarded or rejected participation hours from the computing system responsive to the first bid. The processing circuit is configured to generate one or more second participation hours, a second load reduction amount for each of the one or more second participation hours, and one or more second equipment loads based on the one or more awarded or rejected participation hours and operate the one or more pieces of building equipment based on the one or more second equipment loads.

Abstract: A self-configuring extremum-seeking controller includes a dither signal generator, a communications interface, a phase delay estimator, and a bandwidth estimator. The dither signal generator identifies a stored dither frequency, generates a dither signal having the stored dither frequency, and uses the dither signal to perturb a control input for a plant. The communications interface provides the perturbed control input to the plant and receives an output signal from the plant resulting from the perturbed control input. The phase delay estimator estimates a phase delay between the output signal and the dither signal. The bandwidth estimator estimates a bandwidth of the plant based on the estimated phase delay. The dither signal generator updates the stored dither frequency based on the estimated bandwidth.

Abstract: A multi-function thermostat for a building includes a sensor configured to measure an environmental condition of a building space, a communication interface, and a processing circuit. The communications interface is configured to communicate with an emergency server and receive occupant health data from a health sensor configured to monitor an occupant. The processing circuit is configured to determine a health metric associated with the occupant based on the occupant health data and cause the communications interface to send a distress message to the emergency server when the health metric associated with the occupant indicates a medical emergency.

Abstract: A refrigerant leak management system includes a controller is configured to receive a signal indicative of a refrigerant pressure within a refrigerant circuit and determine whether the refrigerant pressure is indicative of a refrigerant leak in the refrigerant circuit. In response to determining that the refrigerant pressure is indicative of the refrigerant leak, the controller is configured to activate a fan configured to motivate air proximate the refrigerant circuit.

Abstract: A wireless mesh network survey tool is provided. The tool includes a user interface and a processing circuit. The processing circuit is configured to access a scaled floorplan of a building site, and identify a receiver device location on the scaled floorplan. The processing circuit is further configured to instruct a user to position a transmitter device at a number of test locations to determine a signal strength at each of the test locations. The processing circuit is also configured to determine a device count for a proposed mesh network based on the signal strength at each of the test locations. The device count includes a number of repeater devices. The processing circuit is further configured to display the proposed mesh network to the user via the user interface. The proposed mesh network includes recommended locations for the repeater devices on the scaled floorplan.

Abstract: A controller for controlling an environmental condition of a building space includes a proxy sensor configured to measure a proxy value indicating whether an occupant is within the building space and an occupancy sensor configured to measure an occupancy value. The controller includes a processing circuit configured to determine whether the occupant is within the building space based on the occupancy value of the occupancy sensor, generate a proxy parameter based on a first proxy value measured via the proxy sensor in response to a determination that the occupant is not within the building space based on the occupancy value of the occupancy sensor, determine whether the occupant is within the building based on a second proxy value measured via the proxy sensor and the generated proxy parameter, and control one or more pieces of building equipment to control the environmental condition of the building space.

Abstract: A system including a valve positioned in a conduit, wherein the valve is configured to change fluid flow through the conduit. The system includes an actuator having a motor that is configured to selectively rotate the valve toward a desired valve orientation. The system is configured to receive a request for a desired valve orientation, control the motor to move the valve into the desired valve orientation, and sense a condition corresponding to a current valve orientation following movement by the motor. The system is configured to determine if the sensed condition indicates that the current valve orientation matches the desired valve orientation from the request, and, responsive to determining that the current valve orientation does not match the desired valve orientation from the request, control the motor to selectively rotate the valve in a direction to move the valve towards the desired valve orientation.

Abstract: A method includes storing a golden copy of a device tree binary of a system in a trusted execution environment, identifying whether one or more parameters of a running copy of a device tree binary of the system are different from corresponding parameters of the golden copy by comparing the running copy with the golden copy, and performing a corrective action responsive to an indication that at least one of the one or more parameters of the running copy are different from the corresponding parameters of the golden copy.

Abstract: A method for controlling production of one or more refined resources by an energy provider includes predicting a demand for the refined resources by one or more consumers of the refined resources as a function of an incentive offered by the energy provider. The method further includes performing an optimization of an objective function subject to a constraint based on the predicted demand for the refined resources to determine an amount of the refined resources for the energy provider to produce and a value of the incentive at multiple times within a time period. The method also includes providing setpoints for equipment of the energy provider that cause the equipment to produce the amount of the refined resources determined by performing the optimization.

Abstract: A system includes a communications interface communicably coupled to a computing environment and a client device corresponding to a first tenant of a plurality of tenants of the computing environment. The computing environment includes a plurality of resources, at least one resource being accessible by the client device, and a processing circuit including a processor and memory, the memory storing instructions that, when executed by the processor, cause the processor to perform operations including generating a multi-organization token for the at least one resource based on credentials corresponding to the first tenant, receiving a request to access the at least one resource in the computing environment, the request including the first tenant-specific token, determining whether the first tenant-specific token is valid, and providing access to the at least one resource in the computing environment responsive to a determination that the first tenant-specific token is valid.