The present disclosure relates to a heating, ventilation, and/or air conditioning (HVAC) system that includes a mobile air conditioning unit configured to separately dock with each docking station of a plurality of docking stations. The mobile air conditioning unit includes a refrigerant circuit configured to condition an airflow to produce a conditioned airflow and a transportation system configured to autonomously relocate the mobile air conditioning unit.

Embodiments of a TRS Controller to ECU interface are provided. The interface includes a TRS Controller connected to an ECU that is part of an engine. The interface includes a keyswitch connection that is configured to send a keyswitch message from the TRS Controller to the ECU, a run signal connection that is configured to send a run message from the TRS Controller to the ECU, and a CAN communication connection that is configured to provide two-way communication between the TRS Controller and the ECU.

A refrigeration apparatus includes: a usage-side expansion valve whose opening degree is changed in response to a change in a flow rate or a pressure of a refrigerant on the upstream side; a first expansion valve; and a controller. The controller exerts, in an oil recovery operation, an oil recovery first control on the first expansion valve to attain a first opening degree (an opening degree of increasing an opening degree of the usage-side expansion valve in relation to a reduction in the flow rate or the pressure of the refrigerant passing through the first expansion valve), to reduce the flow rate or the pressure of the refrigerant passing through the first expansion valve. The controller exerts an oil recovery second control following the oil recovery first control on the first expansion valve to attain a second opening degree (an opening degree that allows a liquid refrigerant to flow into a usage-side heat exchanger before the opening degree of the usage-side expansion valve is reduced in relation to an increase in the flow rate or the pressure of the refrigerant passing through the first expansion valve), to increase the flow rate or the pressure of the refrigerant passing through the first expansion valve.

A system and method are provided including a system controller for a refrigeration or HVAC system having a compressor rack with a compressor and a condensing unit with a condenser fan. The system controller monitors and controls operation of the refrigeration or HVAC system. A rack controller monitors and controls operation of the compressor rack and determines compressor rack power consumption data. A condensing unit controller monitors and controls operation of the condensing unit and determines condensing unit power consumption data. The system controller receives the compressor rack power consumption data and the condensing unit power consumption data, determines a total power consumption of the refrigeration or HVAC system, determines a predicted power consumption or a benchmark power consumption for the refrigeration system, compares the total power consumption with the predicted power consumption or the benchmark power consumption, and generates an alert based on the comparison.

A cascade unit and a refrigeration cycle apparatus are capable of cooling an electric component. A cascade unit of a refrigeration cycle apparatus includes a primary-side refrigerant circuit that includes a primary-side heat exchanger and through which a primary-side refrigerant flows, a secondary-side refrigerant circuit that includes a secondary-side compressor and a utilization-side heat exchanger and through which a secondary-side refrigerant flows, and a cascade heat exchanger that exchanges heat between the primary-side refrigerant and the secondary-side refrigerant, the cascade unit including the secondary-side compressor, the cascade heat exchanger, a first electric component that drives the secondary-side compressor, a first cooling portion that cools the first electric component with the secondary-side refrigerant flowing through the secondary-side refrigerant circuit, a cascade casing that accommodates the secondary-side compressor, the first electric component, and the first cooling portion.

There is disclosed a controller for a refrigeration circuit, configured to monitor a set of prevailing conditions relating to the refrigeration circuit including a space temperature of a temperature-controlled space associated with the refrigeration circuit. The controller has a simulation module configured to determine a limit setting of a control variable for the refrigeration circuit by an iterative optimisation procedure based on a model corresponding to the refrigeration circuit. The objective function for the optimisation relates to an operating efficiency. The controller further comprises a dynamic control module configured to: adjust an operating setting of the control variable within an operating range to target a performance threshold for a monitored performance parameter, based on monitoring of the performance parameter during operation of the refrigeration circuit; and apply the limit setting received from the simulation module as a limit to the operating range.

A management device manages plural heat pump systems to bring a total amount of energy consumed by the heat pump systems closer to a target value. The management device includes a request transmitting unit, a consumption information receiving unit, a database, and a learning unit. The request transmitting unit transmits requested values of energy consumption to each of the heat pump systems. The consumption information receiving unit receives actual values of energy consumption from each of the heat pump systems. The database stores response characteristics of consumers having each of the heat pump systems with respect to the requested values of energy consumption. The learning unit learns the response characteristics and reflects learning results based on past records of responses of each of the consumers with respect to the requested values of energy consumption in the database.

The hot and cold water air conditioning system includes a water temperature sensor configured to detect a temperature of water flowing out of the heat pump heat source apparatus by an operation of the water circulation pump, and a controller configured to perform, in a heating operation, on/off normal control that turns on a compressor when the water temperature detected by the water temperature sensor becomes lower than a target water temperature and turns off the compressor when the water temperature becomes higher than a first temperature value higher than the target water temperature, and to switch from the on/off normal control, upon repeating the on/off operation of the compressor at a minimum frequency necessary for an operation of the compressor in the on/off normal control, to on/off restriction control that turns on the compressor when the water temperature becomes lower than a second temperature value lower than the target water temperature and turns off the compressor when the water temperature becomes equal to or higher than a third temperature value higher than the target water temperature.

A system and method are provided including a system controller for a refrigeration or HVAC system having a compressor rack with a compressor and a condensing unit with a condenser fan. The system controller monitors and controls operation of the refrigeration or HVAC system. A rack controller monitors and controls operation of the compressor rack and determines compressor rack power consumption data. A condensing unit controller monitors and controls operation of the condensing unit and determines condensing unit power consumption data. The system controller receives the compressor rack power consumption data and the condensing unit power consumption data, determines a total power consumption of the refrigeration or HVAC system, determines a predicted power consumption or a benchmark power consumption for the refrigeration system, compares the total power consumption with the predicted power consumption or the benchmark power consumption, and generates an alert based on the comparison.

A cascade unit and a refrigeration cycle apparatus are capable of cooling an electric component. A cascade unit of a refrigeration cycle apparatus includes a primary-side refrigerant circuit that includes a primary-side heat exchanger and through which a primary-side refrigerant flows, a secondary-side refrigerant circuit that includes a secondary-side compressor and a utilization-side heat exchanger and through which a secondary-side refrigerant flows, and a cascade heat exchanger that exchanges heat between the primary-side refrigerant and the secondary-side refrigerant, the cascade unit including the secondary-side compressor, the cascade heat exchanger, a first electric component that drives the secondary-side compressor, a first cooling portion that cools the first electric component with the secondary-side refrigerant flowing through the secondary-side refrigerant circuit, a cascade casing that accommodates the secondary-side compressor, the first electric component, and the first cooling portion.