Abstract: An air-cooled chiller (100) includes a compressor (12); a cooler (14); a heat recovery heat exchanger (16), wherein the heat recovery heat exchanger is connected between an output of (12b) the compressor and an input header (20) of an air heat exchanger (60). A solenoid valve (30) is located in an input header (20) of the air heat exchanger to divide the input header into a first portion (20a) and a second portion (20b). A controller (32) is configured to control the solenoid valve (30). A second valve (34) is located in the output header (36) to divide the output header into a first portion (36a) and a second portion (36b). There is also provided a method of operating the air-cooled chiller and a method of retrofitting an existing serial-concept air cooled chiller, to provide the present air-cooled chiller.

Abstract: A method for operating a heat pump (20; 300) includes operating in a cooling mode wherein heat is absorbed by refrigerant in the indoor heat exchanger (26) and rejected by refrigerant in the outdoor heat exchanger (24). The heat pump switches to operation in a heating mode wherein heat is rejected by refrigerant in the indoor heat exchanger, heat is absorbed by refrigerant in the outdoor heat exchanger, and there is an ejector (60) motive flow and ejector secondary flow. In the heating mode a refrigerant pressure (PH) or temperature (TL) is measured and, responsive to the measured refrigerant pressure or temperature, at least one of a fan speed is changed and a needle (132) of the ejector is actuated.

Abstract: A transportation refrigeration system including: a transportation refrigeration unit including a compressor, one or more valves, and a controller; an energy storage device configured to provide electrical power to the transportation refrigeration unit; and an intelligent charging connector in electrical communication with the energy storage device and/or the transportation refrigeration unit, the intelligent charging connector being connectable to a power grid and being configured to selectively control a provision of electrical power to the transportation refrigeration unit from the energy storage device and/or the power grid by transitioning the provision of electrical power to the transportation refrigeration unit from being supplied by the energy storage device or the power grid in response to the intelligent charging connector being connected to the power grid or in conjunction with the intelligent charging connector being disconnected from the power grid, respectively.

Abstract: Disclosed is a refrigeration system comprising: condenser; an expansion valve; a first conduit fluidly connecting the condenser and the expansion valve to define a first fluid segment through which a medium is transported when the system is active; and a separator assembly, operably disposed in the first fluid segment, configured to remove non-condensable gas from the medium when the system is active.

Abstract: A method for reporting activity at a lock includes detecting an access attempt at the lock in response to a credential presented at the lock; determining if an event is to be generated in response to the access attempt; upon generation of the event, determining if an alert is to be generated in response to the event.

Abstract: A coolant system includes a multistage compressor having a plurality of surge detection sensors. A condenser is connected to an outlet of the multistage compressor. An economizer is connected to an outlet of the condenser and has a gaseous coolant outlet and a liquid coolant outlet. The liquid coolant outlet is connected to a cooler and the gaseous coolant outlet is connected to a second or later stage of the multistage compressor via a controllable valve. A controller is communicatively coupled to the surge detection sensors and the controllable valve. The controller includes a non-transitory medium storing instructions for causing the controller to detect an occurrence of a surge and restricting a flow through the controllable valve until the surge has ceased.

Abstract: A method and system for making enhanced activated carbon are disclosed. A first heated gas including oxygen flows through a fluidized bed including particles comprising activated carbon to form oxidized activated carbon particles. A second heated gas including nitrogen, ammonia or a combination thereof, flows through a fluidized bed including the oxidized activated carbon particles to form nitrogenated activated carbon particles. A third heated gas including hydrogen flows through a fluidized bed including the nitrogenated activated carbon particles to form the enhanced activated carbon particles.

Abstract: A transportation refrigeration system including: a transportation refrigeration unit; an energy storage device configured to provide electrical power to the transportation refrigeration unit; an electric generation device operably connected to at least one of a wheel and a wheel axle of the transport refrigeration system, the electric generation device being configured to generate electrical power from at least one of the wheel and the wheel axle to charge the energy storage device when the electric generation device is activated; a rotational velocity sensor configured to detect a rotational velocity of the electric generation device; and a power management module in electrical communication with the energy storage device, the electric generation device, and the rotational velocity sensor, wherein the power management module is configured to decrease a torque limit of the electric generation device when the rotational velocity of the electric generation device decelerates greater than a selected deceleration

Abstract: A refrigeration system, comprising a compressor, a condenser, a throttle flow path, and an evaporator connected in sequence, wherein a non-adjustable main throttle element is disposed in the throttle flow path; and further comprising a bypass flow path, wherein the bypass flow path is connected to the throttle flow path respectively at the upstream and downstream of the main throttle element, and provided with an adjustable auxiliary throttle element thereon; a liquid level sensor, disposed upstream and/or downstream of the throttle flow path, and configured to detect the liquid level; and a controller, wherein the controller is configured to control the opening of the auxiliary throttle element according to a liquid level signal from the liquid level sensor.

Abstract: An integrated air conditioning system having a first air conditioning unit having a first evaporator with a first input and a first output; a second air conditioning unit having a second evaporator with a second input and a second output; a first conduit fluidly connecting the first input with the second output; a second conduit fluidly connecting the second input with the first output. The first and second conduits and the first and second evaporators form a working fluid circuit.

Abstract: A refrigerated transport system comprises a body enclosing a refrigerated compartment. A refrigeration system (29) comprises first and second vapor compression loops each having: a refrigerant charge; a compressor (36A,B) for driving the refrigerant of the refrigerant charge; a first heat exchanger (38A,B) positioned to reject heat to an external environment in a cooling mode; and a second heat exchanger (42A,B) positioned to absorb heat from the refrigerated compartment in the cooling mode.

Abstract: Disclosed is an entry system for a building having: a first door lock that includes a controller; wherein the first door lock is configured for encoding access rights to a first client keycard responsive to a first engagement with a master keycard.

Abstract: Refrigeration systems are described. The systems include a compression device, a heat rejecting heat exchanger, an ejector, and first and second expansion devices with respective heat absorbing heat exchangers. The ejector is arranged to receive refrigerant fluid from the heat rejecting heat exchanger at a high pressure inlet of the ejector. Fluid pathways extend from an outlet of the ejector into a branched flow path to provide flows of refrigerant from the ejector to the first and second expansion devices. The first heat absorbing heat exchanger provides cooling at a first temperature and refrigerant fluid from the outlet of the first heat absorbing heat exchanger is directed to a low pressure inlet of the ejector. The second heat absorbing heat exchanger provides cooling at a second temperature and refrigerant fluid from the outlet of the second heat absorbing heat exchanger is directed to the inlet of the compression device.

Abstract: A photoacoustic detection system (20) includes a detector (22) that has a chamber (24), a pulsed light source (26), piezoelectric tuning forks (28), and a photosensor (30). The chamber has an inlet and an outlet for flow of an analyte. The pulsed light source is adjacent the chamber and is operable to emit a light beam along a path through the chamber. The tuning forks are arranged along the path, and each of the tuning forks is operable to emit first sensor signals. The photosensor is arranged along the path and is operable to emit second sensor signals. A controller (38) is connected to receive the first and second sensor signals. The controller is configured to determine whether a target species is present in the analyte based on the first sensor signals and determine whether the target species is present in the analyte based on the second sensor signals.

Abstract: A method for data transfer includes establishing a first wireless connection between a transceiver and a handheld device, the transceiver initially operating in an peripheral role and the handheld device operating in a central role; switching a role of both the transceiver and the handheld device in response to establishing the first wireless connection, the transceiver module switching from the peripheral role to the central role, and the handheld device from the central role to the peripheral role; and establishing a second wireless connection between the transceiver and the handheld device subsequent to the switching.

Abstract: A locking module for selectively coupling a first component and a second component of a lockable device includes a housing and a magnet arranged within said housing. A locking element is movable relative to said housing between an unlocked position and a locked position. An engagement member is rotatable about an axis to selectively decouple said locking element from said magnet to move said locking element between said unlocked position and said locked position.

Abstract: A method of determining placement of nozzles within a fire suppression system comprising: determining a geometry of a room in response to a floor plan; determining a type of fire suppression agent required in response to at least one of articles in the room and hazards in the room; determining an amount of fire suppression agent required in response to at least one of the articles in the room, hazards in the room, the geometry of the room, average temperature in the room, and average pressure within the room; and determining a number of nozzles, a type of each of the nozzles, a location of each of the nozzles within the room in response to at least the amount of fire suppression agent required.

Abstract: A fire protection system 100 includes one or more fire protection components 12 that can each generate messages indicating an event. Messages are determined to be indicative of either critical or non-critical events. Data associated with messages indicative of critical events is stored in a first collection of event data 32, while data associated with messages indicative of non-critical events is stored in a second different collection of event data 32.

Abstract: An oil separator to separate oil from oil and refrigerant mixture. The oil separator includes inlets to allow entry of the oil and refrigerant mixture into the oil separator. The mixture flows and strikes on center of the one or more walls of the oil separator. The mixture then flows towards demister pads for filtration. The oil is separated from the mixture and exits the oil separator from the oil outlet. The refrigerant separated from the mixture escapes through the refrigerant outlet.