Abstract: A refrigeration cycle apparatus (10) includes a refrigerant circuit (11) including a compressor (12), a heat source-side heat exchanger (13), an expansion mechanism (14), and a usage-side heat exchanger (15). In the refrigerant circuit (11), a refrigerant containing at least 1,2-difluoroethylene (HFO-1132 (E)) is sealed. At least during a predetermined operation, in at least one of the heat source-side heat exchanger (13) and the usage-side heat exchanger (15), a flow of the refrigerant and a flow of a heating medium that exchanges heating with the refrigerant are counter flows.

Abstract: A heat source-side unit (10) includes a heat source-side circuit (11). The heat source-side circuit (11) includes a compression unit (20) including a lower-stage compression element (23) and a higher-stage compression element (21), an intermediate heat exchanger (17) disposed on a refrigerant path between the lower-stage compression element (23) and the higher-stage compression element (21), and a bypass passage (23c) connected to a suction pipe (23a) and a discharge pipe (23b) each connected to the lower-stage compression element (23). At startup of the compression unit (20), a first action is performed for stopping the lower-stage compression element (23) and operating the higher-stage compression element (21). This configuration thus suppresses occurrence of liquid compression at startup of a compressor.

Abstract: A station and method for refilling a tank or tanks with pressurized gas in which liquefied gas is vaporized in a vaporizer. One portion of the vaporized gas is compressed to produce a compressed gas. Another portion of the vaporized gas is not compressed but instead is fed to a heat exchanger where it is used to cool the compressed gas. The thus-warmed gas is reinjected into a filling line that feeds the liquefied gas to the vaporizer.

Abstract: A cold energy storage evaporator is used in a vehicle refrigeration cycle device configured to cool a vehicle compartment. The cold energy storage evaporator includes a refrigerant tube through which a refrigerant flows, and a cold energy storage member that is in close contact with the refrigerant tube, the cold energy container accommodating therein a cold energy storage member configured to freeze due to heat absorption by the refrigerant. A melting point of the cold energy storage member is higher than 11 degrees Celsius.

Abstract: A system includes a high side heat exchanger, a flash tank, a first load, a second load, and a thermal storage tank. The high side heat exchanger is configured to remove heat from a refrigerant. The flash tank is configured to store the refrigerant from the high side heat exchanger and discharge a flash gas. The first load is configured to use the refrigerant from the flash tank to remove heat from a first space proximate to the first load. The second load is configured to use the refrigerant from the flash tank to remove heat from a second space proximate to the second load. The thermal storage tank is configured, when a power outage is determined to be occurring, to receive the flash gas from the flash tank, and remove heat from the flash gas.

Abstract: A computer cooling assembly for a computer of a vehicle, such as an autonomous driving vehicle, includes a shell that defines an interior space. The shell is configured to house the computer. A cooling loop is positioned in the interior space proximate to the computer. The cooling loop is configured to couple to an air conditioning system. A heat transfer medium is positioned in the interior space. The heat transfer medium is in contact with the cooling loop and the computer. The heat transfer medium is configured to transfer heat that is generated by the computer to the cooling loop.

Abstract: A thermo-acoustic device for transferring energy by an acoustic wave, includes a resonator; a source for generating the acoustic wave; a thermodynamic section that forms an acoustic network and includes a compliance volume, a thermo-acoustic core and a fluidic inertia. The thermodynamic section is situated between the resonator and the source. The thermo-acoustic core is within the thermodynamic section and includes a cold terminal, a hot terminal and a regenerator. The regenerator is positioned between the hot and cold terminals. The source includes a piston compressor. The compressor is arranged as a mechanical double acting reciprocating piston compressor with a first outlet for a pressure wave generated on one side of the piston and a second outlet for a pressure wave generated on the other side of the piston. The first outlet is coupled with a first thermodynamic section, and the second outlet coupled with a second thermodynamic section.

Abstract: The invention relates to a ternary composition comprising difluoromethane, 1,3,3,3-tetrafluoropropene and a hydrocarbon-derived compound containing at least two fluorine atoms and having a boiling point of between ?30 and ?20° C., which is selected from 1,1-difluoroethane, 1,1,1,2-tetrafluoroethane and 2,3,3,3-tetrafluoropropene. This composition is particularly suitable for use as a heat-transfer fluid in the presence of countercurrent heat exchangers.

Abstract: A power conversion device includes a first AC-DC conversion section generating DC voltage applied to a compressor drive section, a first DC-voltage smoothing section smoothing DC voltage, a first noise reduction section having one end connected to an AC power source and the other end connected to the first AC-DC conversion section, a second noise reduction section disposed between the first noise reduction section and the first AC-DC conversion section, an inrush-current inhibition circuit (a first inrush-current inhibition resistor and a rectifier diode) connected in parallel with the second noise reduction section and the first AC-DC conversion section for inhibiting inrush current from flowing to the first DC-voltage smoothing section, a first AC power-source relay opening/closing a power supply path to the inrush-current inhibition circuit, and a second AC power-source relay opening/closing a power supply path to the second noise reduction section.

Abstract: A fluid transfer apparatus includes a spiral pipe that is formed by an elastic tube wound in a spiral manner, and a fluid to be transferred flows in the spiral pipe. The fluid transfer apparatus further includes a speaker that is configured to generate a pressure wave in a working fluid in the tube that is a medium, and the pressure wave causes a change of the cross-sectional area of a flow channel of the tube.

Abstract: A cryogenic refrigerator includes a refrigerator having a cylinder and a displacer movably arranged in the cylinder. The displacer is operative to provide intake of an operating gas into the cylinder and exhaust of the gas out of the cylinder. The refrigerator includes a compressor for compressing the operating gas. The compressor includes a low-pressure side to receive the gas exhausted from the cylinder and a high-pressure side to discharge the gas compressed in the compressor into the cylinder. The refrigerator includes a medium-pressure buffer volume connected to a high-pressure side or a low-pressure side of the compressor. The compressor adjusts a pressure of the buffer volume. The buffer volume is also connected to the cylinder.

Abstract: A method and a device for operating a waste heat utilization device for an internal combustion engine of a motor vehicle is disclosed. The waste heat utilization device contains a waste heat utilization circuit in which a working medium circulates. A conveyor, an evaporator, an expansion machine, and a condenser are disposed in the waste heat utilization circuit. A basic adjustment of the waste heat utilization circuit is provided, which as a function of a heat input into the working medium adjusts the mass flow rate at the conveyor and/or the ratio between high pressure and low pressure at the expansion machine. In addition, a pilot control is provided which recognizes a change of the operating point of the internal combustion engine and, when the operating point is changed, controls the condensation output of the condenser in accordance with a mass distribution of the working medium in the waste heat utilization circuit optimized to the new operating point.

Abstract: The present invention provides a multi-stage double-acting traveling-wave thermoacoustic system, comprising three elementary units, each elementary unit comprises a linear motor and a thermoacoustic conversion device; the linear motor comprises a piston and a cylinder, the piston can perform a straight reciprocating motion in the cylinder; each thermoacoustic conversion device comprises a main heat exchanger and a heat regenerator connected in sequence, and the heat regenerator is of a ladder structure; a set of a non-normal-temperature heat exchanger, a thermal buffer tube and an auxiliary heat exchanger is connected at each ladder of the heat regenerator; and the main heat exchanger and the auxiliary heat exchanger of each thermoacoustic conversion device are connected to cylinder cavities of different linear motors respectively forming a loop structure for flow of a gas medium.

Abstract: Disclosed is a thermoacoustic engine having: resonance pipes including a working gas; motors; and a branch pipe, where each of the motors has a regenerator, a heater, and a cooler, a temperature gradient is given between both ends of the regenerator to generate self-excited oscillation of the working gas, a channel cross-sectional area of the resonance pipe that is coupled to the heater is expanded by a same amplification factor of a work flow based on the self-excited oscillation or by an amplification factor within a range of ±30% of the amplification factor of the work flow to a channel cross-sectional area of a resonance pipe that is coupled to the cooler, and a channel cross-sectional area of the regenerator is set by 4 to 36 times of the channel cross-sectional area of the resonance pipe that is coupled to the cooler.

Abstract: A vaporizer has: an inlet (72); an oil outlet (90; 94); a vent (120); a hot gas inlet (132); and a cooled gas outlet (134). A gas flowpath (130) extends from the hot gas inlet to the cooled gas outlet. A vaporizer chamber (192) is downstream of the inlet along a primary flowpath. A gas conduit (220) is along the gas flowpath in heat exchange relation with the primary flowpath. A sump (194) is below the vaporizer chamber. A housing (180) encloses the sump and the vaporizer chamber. A passageway extends from the vaporizer chamber to the sump.

Abstract: A scroll compressor is provided. The scroll compressor may include a casing, a discharge cover to partition an inside of the casing into suction and discharge spaces, a first scroll, a second scroll that defines compression chambers together with the first scroll and includes an intermediate pressure discharge hole that communicates with a compression chamber having an intermediate pressure of the compression chambers, a back pressure plate that defines a back pressure chamber that accommodates a refrigerant discharged from the intermediate pressure discharge hole, a floating plate that defines the back pressure chamber together with the back pressure plate, and a gasket disposed between the back pressure plate and the second scroll and having an intermediate pressure communication hole that allows the intermediate pressure discharge hole to communicate with the intermediate pressure suction hole. The gasket may block communication between the back pressure chamber and the suction and discharge spaces.

Abstract: A system and method for storing cold energy are detailed. The system includes a solid refrigerant in a structured form that stores cold energy. Upon deformation, the solid refrigerant transforms into a high energy deformed state from a low energy non-deformed state. In the deformed state, the solid refrigerant stores cold energy that can be released to a desired location upon demand.

Abstract: A digital non-contact tympanic thermometer has a tympanic probe with an IR sensor at the end of the probe in which the digital non-contact tympanic thermometer can be converted to a digital non-contact non-tympanic thermometer for non-tympanic surfaces by placement of removeable probe cover over the tympanic cover in which the probe cover includes a parabolic condenser at the tip of the probe cover that increases gathering of incoming infrared energy.

Abstract: A compressor device that periodically supplies compressed working gas to a cooling device loses less gas by not using a rotary valve. The compressor device includes a compressor chamber, a working gas connection, a working liquid connection, a pump, a compensation container and a membrane that is airtight and liquid-tight. The membrane divides the compressor chamber into a first volume containing a working gas and a second volume containing a working liquid. The working gas connection is coupled to the first volume, and the working liquid connection is coupled to the second volume. The pump periodically pumps the working liquid through the working liquid connection and into the second volume and as a result periodically compresses the working gas in the first volume. The membrane is constructed as a balloon or a bellows that surrounds the first volume. The compensation container contains working liquid and is connected to the pump.

Abstract: The present invention relates to compositions for use in refrigeration, air-conditioning, and heat pump systems wherein the composition comprises E-1,2-difluoroethylene. The compositions of the present invention are useful in processes for producing cooling or heat, as heat transfer fluids, foam blowing agents, aerosol propellants, and power cycle working fluids.

Abstract: Non ozone depleting and non flammable refrigerant compositions with GWPs less than 2,000 ITH which replace R404A, R507, HCFC22 and CFC502 in refrigeration systems.

Abstract: A climate control system is provided and may include a compressor, a first heat exchanger, a second heat exchanger, and a coolant flow path. The compressor may include a suction port, a first discharge port and a second discharge port. The first heat exchanger may be in fluid communication with the first discharge port. The second heat exchanger may be in fluid communication with the second discharge port. The coolant flow path may be in fluid communication with the first heat exchanger and the second heat exchanger.

Abstract: A system off configuration for an automotive climate control system is provided. The climate control system includes a compressor having two downstream flow paths. The two downstream flow paths may be selectively used to provide multiple modes of operation. When the compressor moves to an off condition the valves found in each flow path immediately downstream from the compressor are closed so that a refrigerant oil blend is kept in the compressor.

Abstract: The invention provides a heat transfer composition comprising R-1234ze (E), R-32 and 1,1,1,2-tetrafluoroethane (R-134a).

Abstract: A heat pump device includes a compressor including a compression mechanism that compresses a refrigerant and a motor that drives the compression mechanism, an inverter that applies a voltage for driving the motor, a converter that applies a voltage to the inverter, an inverter control unit that generates a driving signal for driving the inverter, and a converter control unit that generates a driving signal for driving the converter, wherein the inverter control unit includes a heating operation mode in which a heating operation of the compressor is performed and a normal operation mode in which a refrigerant is compressed by performing a normal operation of the compressor and the converter control unit sets, in the heating operation mode of the inverter control unit, a voltage applied to the inverter on the basis of a voltage command value for the motor.

Abstract: A Vuilleumier heat pump is disclosed in which hot and cold displacers are controlled by first and second electromagnetic actuators, respectively. The first actuator is capable of moving the hot displacer between the first and second ends of travel while the cold displacer remains stationary and the second actuator is capable of moving the cold displacer while the hot displacer remains stationary. Prior art crank arrangements are unable to provide dwell in one displacer while moving the other displacer. Actuation of the displacers according to embodiments of the present disclosure provides a higher coefficient of performance than crank arrangements.

Abstract: An air conditioning companion stabilizer system for improving the operating cooling efficiency of refrigeration cycle components in air conditioning systems integrates the refrigeration cycle components with two independent, closed loops whose operation is complementary of one another. A temperature stabilizing loop functions in ambient conditions that lower cooling efficiency and is operative to absorb heat from the refrigerant exiting the condenser, thereby lowering the temperature of the refrigerant before it arrives at the expansion valve. A secondary loop, or charging loop operating in ambient conditions that enable optimal cooling efficiency facilitates the operation of the temperature stabilizing loop by priming a rechargeable heat absorbing component.

Abstract: A liquefier for a heat pump includes a liquefier space and a process water tank. The process water tank is arranged within the liquefier space such that it is substantially surrounded by liquefied working fluid. A wall of the process water tank, however, is spaced from a wall of the process water tank so that a gap formed to communicate with the region of the heat pump in which compressed gas is present is obtained, so that the process water tank is thermally insulated from the space for liquefied working fluid via this gas-filled gap. The liquefier itself may also be surrounded by the gas region, in order to provide for inexpensive insulation of the liquefier.

Abstract: A method for charging and discharging a heat accumulator is provided. A system by which the method can be performed is also provided. By means of the heat accumulator, it is possible to convert overcapacities of wind turbines, for example, into a charging circuit as heat in the accumulator by a compressor. If necessary, electricity can be stored into the network by a turbine and a generator, wherein the heat accumulator is discharged. The charging circuit and the discharging circuit are operated by a Rankine cycle, wherein for example river water is available as a reservoir for heat exchangers in order to cause evaporation of the working medium in the charging circuit and condensation of the working medium in the discharging circuit.

Abstract: The invention provides a heat transfer composition comprising (i) from about 45 to about 75% by weight 2,3,3,3-tetrafluoropropene (R-1234yf); and (ii) from about 25 to about 55% by weight 1,1,1,2-tetrafluoroethane (R-134a). A heat transfer composition comprising, optionally consisting essentially of, (i) from about 20 to about 90% by weight R-1234yf; (ii) from about 10 to about 60% by weight R-134a; and (iii) from about 1 to about 20% by weight R-32 is also provided.

Abstract: A resin magnet, a magnetic pole position detection resin magnet, and a sleeve bearing, which is disposed inside the resin magnet, are integrally molded together with a thermoplastic resin in a rotor portion. At the same time, an impeller attachment portion is formed by the thermoplastic resin.

Abstract: In a rotor portion, a magnet formed in a cylindrical shape, a first magnet holder that holds an impeller-attachment-portion-side end portion of the magnet, a second magnet holder that holds a magnetic-pole-position-detection-element-side end portion of the magnet, a back yoke disposed inside the magnet, a sleeve bearing disposed inside the back yoke, and a position detection magnet that is provided on a surface of the second magnet holder at a side opposite to the side at which the magnet is attached and allows a magnetic flux of the position detection magnet to be detected by the magnetic-pole-position detection element are assembled integrally together with a thermoplastic resin, and the impeller attachment portion is formed of the thermoplastic resin.

Abstract: An apparatus for cooling a containerized fluid apparatus has a refrigerant-delivery assembly axially depending from a handle assembly. The handle assembly forms a receptacle for receiving a canister of refrigerant such as pressurized liquid carbon dioxide (CO2). The refrigerant-delivery assembly comprises a supply tube through which refrigerant is fed from the canister in the handle assembly to a refrigerant-containment compartment enclosing an exit port of the supply tube and entry ports of one or more expansion tubes. The refrigerant-containment compartment places the supply tube in fluid-flow communication with the expansion tubes. The expansion tubes are rotatable about the axis of the supply tube. The expansion tubes are made to rotate by either a nozzle-turbine feature or a motor-and-gear subassembly. As refrigerant expands in the expansion tubes it takes on heat in accordance with thermodynamic properties thereby cooling the containerized fluid.

Abstract: In a temperature control system using a controlled mix of high temperature pressurized gas and a cooled vapor/liquid flow of the same medium to cool a thermal load to a target temperature in a high energy environment, particular advantages are obtained in precision and efficiency by passing at least a substantial percentage of the cooled vapor/liquid flow through the thermal load directly, and thereafter mixing the output with a portion of the pressurized gas flow. This “post load mixing” approach increases the thermal transfer coefficient, improves control and facilities target temperature change. Ad added mixing between the cooled expanded flow and a lesser flow of pressurized gas also is used prior to the input to the thermal load. A further feature, termed a remote “Line Box”, enables transport of the separate flows of the two phase medium through a substantial spacing from pressurizing and condensing units without undesired liquefaction in the transport lines.

Abstract: In a pump, a resin magnet included in a rotor portion has a plurality of groove portions in an outer peripheral portion thereof, the groove portions extending in an axial direction.

Abstract: A sample cooling device for histological samples is connectable to a power network for supplying electrical voltage to the device. The sample cooling device comprises a measuring apparatus for measuring a magnitude of an input line voltage present at the sample cooling device, and a transformer having a primary coil that comprises at least three coil pickoffs, and a secondary coil. The sample cooling device further comprises a switching means that connects two of the coil pickoffs to the power network as a function of the magnitude of the input line voltage, so that a magnitude of an output voltage present at the secondary coil has a predefined or predefinable voltage value irrespective of the magnitude of the input voltage. A corresponding method for supplying electrical power to a sample cooling device for histological samples is also disclosed.

Abstract: An apparatus for cooling objects such as food items, beverages or vaccines comprises at least two reservoirs, a cooling device for cooling fluid contained in one of the reservoirs and a thermal transfer region between respective upper regions of the reservoirs. The thermal transfer region permits thermal transfer between the fluid contained in the reservoirs such that cooling of the fluid in one reservoir causes cooling of the fluid in the other reservoir.

Abstract: Methods, systems, and/or devices are provided for producing a heat pump. In some embodiments, the heat pump may be driven by low temperature heat. The methods, systems, and devices may include tools and techniques for: precipitating a first material, where heat may be released from the precipitated first material; cooling the precipitated first material; dissolving the cooled precipitated first material into a second material to create a dissolved mixture, where heat may be absorbed into the mixture; and/or separating the first material and the second material from the dissolved mixture.

Abstract: Apparatus and method are disclosed for the invention of a non-chemical means to lower the surface tension of a solution of liquid water and gaseous oxygen. An apparatus of the present invention comprises a source of chilled purified water, and gaseous oxygen fed into a positive displacement pump, followed by a cylinder reduced at one end by means of a convergent cone, a section of a smaller diameter cylinder attached to a divergent cone tapering up to another cylinder of a diameter the same or larger than the original cylinder. A coil of refrigeration tubing is wrapped around the smaller center cylinder to control the temperature of the inner cylinder surface. Although the preferred embodiment of this invention is to produce a dissolved oxygen solution for use in humans as a means of delivering oxygen to the portal vein system for treatment of various disorders, it is in no way limited to this particular application.

Abstract: A valve case (11) includes a plurality of ports (P1, P2, P3, . . . ). A valve body (50) rotates in the valve case (11) and slide on openings of predetermined ones of the ports (P1, P2, P3, . . . ) to switch a communication state among the ports (P1, P2, P3, . . . ). A motor (31) rotates the valve body (50). A controller (500) controls a rotation speed (?) of the motor (31) in accordance with a differential pressure (?P) between internal and external pressures of the valve body (50).

Abstract: In an injectible two-staged rotary compressor, a second suction pipe includes a heat-exchange promoting unit that promotes heat exchange between intermediary-pressure injected refrigerant and internal space or an external surface of a sealed container. The heat being exchanged by the intermediary-pressure injected refrigerant absorbing heat.

Abstract: A heat exchanger is provided that includes a first tube/fin block, first headers arranged on both sides of the first tube/fin block, which first headers communicate with the tubes of the first tube/fin block, and a second tube/fin block having second headers arranged on both sides of the second tube/fin block, which second headers communicate with the tubes of the second tube/fin block, wherein the first tube/fin block having the corresponding first headers is an air-cooled low-temperature coolant cooler and the second tube/fin block having the corresponding second headers is an air-cooled refrigerant cooler, wherein the headers of the first tube/fin block arranged on a respective side of the tube-fin block and a header of the second tube/fin block are connected to one another.

Abstract: A heat sink assembly is disclosed for cooling a power electronics module, such as a variable frequency drive. The heat sink assembly includes a housing and a heat sink structure. The housing defines an interior chamber for enclosing the power electronics module and also defines a cooling air flow channel exterior to the interior chamber. The heat sink structure is disposed in conductive heat transfer relationship with the interior chamber and has a heat transfer surface positioned within the exterior cooling air flow channel in convective heat transfer relationship with the cooling air flow.

Abstract: A method of operating an air conditioning system includes operating a refrigeration unit to cool a volume of refrigerant and circulating the refrigerant to a heat exchanger. A serviced space is cooled via a thermal energy exchange between the serviced space and the refrigerant at the heat exchanger. Thermal energy generated by operation of the refrigeration unit is stored at a thermal energy storage system. An air conditioning system includes a refrigeration unit and a heat exchanger operably connected to the refrigeration unit. The heat exchanger is configured to transfer thermal energy between a serviced space and the refrigeration unit, thus cooling the serviced space. A volume of thermal energy storage medium is utilized to absorb thermal heat generated by the refrigeration unit for dissipation into the ambient environment at a selected time.

Abstract: A heating, ventilation and/or air-conditioning device (1) includes at least a first component (9) for generating heat and/or cold, at least a second component (13), a power supply circuit (3) shared by the first and second components, and a controller (4) for the power supply circuit (3). The first and the second components cooperate to output air at a selected temperature. The device is characterized in that it further includes a relay (5) for cutting off the supply of power to the first component (9). The relay (5) can be activated separately from the controller (4), and is arranged in the circuit such that the supply of power to the second component (13) is independent of the state of activation of the relay (5).

Abstract: A method for making and dispensing liquid or semi-liquid food products is implemented in a machine including a one containment tank for containing a liquid basic product, a processing circuit for that product, to obtain a liquid or semi-liquid food product, a dispenser for dispensing the food product, an actuator acting on the basic product and/or on the food product and/or on parts of the machine, and a user interface for controlling the making and dispensing. The method, implemented by a control and processing unit connected with the user interface, includes: measuring one or more operating parameters, activating a first data communication for obtaining the operating parameters, receiving the operating parameters, activating a second data communication with the user interface for receiving commands representing selectable settings of preparations, and controlling the actuator as a function of the operating parameters and commands received.

Abstract: The present technology relates to compositional blends that can be used as refrigerants, and more specifically to blends of vinylidene fluoride and at least one other component for use in very low temperature applications. In at least some examples, the second component can be selected from the group consisting of carbon dioxide and pentafluoroethane. Further, the compositions can be azeotropic or azeotrope-like.

Abstract: Heat transfer compositions, methods and use wherein the composition comprising: (a) from about 5 to about 20% by weight of HFC-32; (b) from about 70% to about 90% by weight of HFO-1234ze; and (c) from about 5% to less than about 20% by weight of HFC-152a and/or HFC-134a.

Abstract: A heat sink and method for gaseous cooling of superconducting power devices. Heat sink is formed of a solid material of high thermal conductivity and attached to the area needed to be cooled. Two channels are connected to the heat sink to allow an inlet and an outlet for cryogenic gaseous coolant. Inside the hollow heat sink are fins to increase metal surface in contact with the coolant. The coolant enters through the inlet tube, passes through the finned area inside the heat sink and exits through the outlet tube.

Abstract: The invention relates to the use of compositions essentially containing 2,3,3,3-tetrafluoropropene, HFC-134a and HFC-32 in compression refrigeration systems comprising exchangers operation in counterflow mode.