Abstract: Refrigeration apparatus (1) having a closed circuit (C) in which a flow rate (P) of coolant circulates, said closed circuit comprising at least one main branch (M) provided with at least one main compressor (2), at least one cooling device (3) to cool said coolant, expansion means (4) to expand the coolant and at least one evaporator (5), said closed circuit further comprising at least one secondary economizer branch (100) for at least one fraction of flow rate (X1) of said coolant, wherein the inlet section (100a) of said at least one first secondary economizer branch (100) is arranged in a length (101) of said closed circuit (C) comprised between said cooling device (3) and said expansion means (4) and the outlet section (100b) of said at least one secondary economizer branch (100) is arranged in proximity of the suction of said main compressor (2), said main branch (M) further comprises at least one reciprocating compressor (6) arranged between said evaporator and said main compressor.

Abstract: A thermal management system is described. The thermal management system includes an open circuit refrigeration circuit that has a refrigerant fluid flow path, with the refrigerant fluid flow path including a receiver configured to store a refrigerant fluid, an ejector having a primary flow inlet configured to receive refrigerant, a liquid separator, an evaporator configured to extract heat from a heat load that contacts the evaporator, with the evaporator coupled to the ejector and the liquid separator, and an exhaust line coupled to a vapor side outlet of the liquid separator. In operation, the evaporator in the open circuit refrigeration circuit would be coupled to a heat load.

Abstract: The invention relates to an expansion unit for installation in a refrigerant circuit, including an expansion system having an subcooling unit for subcooling a mass flow of a refrigerant that is supplied to the expansion unit, having an expansion/compression unit including an expander stage and a compressor stage, having a branching point that splits off a subcooling mass flow from a total mass flow supplied to the expansion unit and that is connected to a supply conduit that guides the subcooling mass flow to an inlet of the subcooling unit, having an expansion member that expands the subcooling mass flow to a subcooling pressure, having a connection conduit that supplies the subcooling mass flow exiting from the subcooling unit to the compression stage, which for its part compresses the subcooling mass flow to a return high pressure, and having an electrically operated controller that detects an ambient temperature and/or a temperature of the mass flow of refrigerant that is supplied to the expansion unit an

Abstract: In an air conditioner, an inlet pipe penetrates a location that is offset towards an outer circumferential side from an apex portion of a top portion. The suction pipe penetrates a location that is offset towards the outer circumferential side from an apex portion of a bottom portion and is inserted into the interior of the main body portion, and the suction inner pipe, which constitutes a portion of the suction pipe that lies in the interior of the main body portion, extends as far as an upper portion of the main body portion so that an inlet port is disposed in a space defined by the top portion. Then, the suction inner pipe includes a bend portion that is bent from a location lying slightly above a location where the suction pipe penetrates the bottom portion as an originating point.

Abstract: Thermal management systems for cooling high-power, low-duty-cycle thermal loads that include at least three thermally coupled, closed subsystems are provided. Thermal management systems provided herein include a main thermal energy storage loop including a cold-temperature tank and a warm-temperature tank. Thermal management systems provided herein also include a multi-stage compression system or a cascaded architecture of a low-temperature vapor compression system and a high-temperature vapor compression system. Methods of transferring heat from one or more thermal loads to an ambient environment are also provided.

Abstract: Modular heating and cooling systems may include one or more modules connected to a fluid input and fluid output. A modular heating system includes at least one heating and cooling apparatus. The apparatus includes a first heat exchanger, a second heat exchanger and a third heat exchanger. The apparatus further includes a refrigerant line system coupled to the first (e.g. cooling), second (e.g. heating) and third (e.g. source) heat exchangers and configurable for selectively directing refrigerant fluid through the heat exchanger to provide multiple modes of operation. The heating, cooling and source fluid loops may be separate and independent such that the fluids do not mix.

Abstract: A horizontal gas-liquid separator for an air conditioner includes a housing and a refrigerant inlet pipe. The housing defines a cavity. The cavity has a gas outlet formed in the top of the cavity and a liquid outlet formed in the bottom of the cavity. A minimum distance between the gas outlet and a left sidewall of the cavity is denoted by L1, and a minimum distance between the liquid outlet and the left sidewall of the cavity is denoted by L2. The refrigerant inlet pipe is located on a left side wall of the housing and has an end extending into the cavity. A distance between an end face of the end of the refrigerant inlet pipe and the left sidewall of the cavity is denoted by L3, and L3?L1, L3?L2.

Abstract: Apparatus including a refrigeration system, a geothermal system, and a refrigerant flow control apparatus connected between the refrigeration system and the geothermal system, wherein a first valve system is selectively actuatable to (i) in a first operation mode cause the refrigerant from a refrigerant circuit to flow through a first heat exchanger, with no refrigerant flow through a second heat exchanger, (ii) in a second operation mode cause the refrigerant from the refrigerant circuit to flow first through the first heat exchanger and then through the second heat exchanger in a first refrigerant flow direction, (iii) in a third operation mode cause the refrigerant from the refrigerant circuit to flow through the second heat exchanger, with no refrigerant flow through the first heat exchanger, and (iv) in a fourth operation mode cause the refrigerant from the refrigerant circuit to flow first through the second heat exchanger and then through the first heat exchanger in a second refrigerant flow direction.

Abstract: A set of devices that can leverage creating small volume changes with small amount of work to create larger heat energy temperature differences, recycle a portion of the compression energy equal to approximately the ratio of the absolute temperature of the cooled space to the heated space, and recycle the heat energy to reduce or eliminate the effect of the temperature gap between the cooled space and heated space. Piston, rotary and turbine based devices are disclosed to achieve the recycled compression energy, for systems designed with single phase vapor or air working fluids. System configuration with counterflow heat exchanger disclosed to recycle the energy needed to cross the temperature gap, applicable both to air/vapor systems and to Freon/refrigerant 2 phase systems. Resulting single phase systems can operate over entire temperature range of Earth's surface and are not limited to constrained temperature range of refrigerant phase change.

Abstract: Standalone and self-contained cooling systems using compressed liquid and/or gas CO2 containers positioned in an insulated or non-insulated vessel encompassing a container which is either vertically positioned in an upright or an upside-down position. The liquid and/or gas CO2 coolant is then released into a capillary system or flow metering system to allow the CO2 to enter a second body to where the CO2 coolant properties may be leveraged. The second body includes, by way of example, a plate, a cushion, a spot treatment pad for a person's muscle, or a cooler. The temperature is controlled by a metering CO2 releasing system encompassing an electronic control device which sends alerts when pre-defined thresholds are exceeded. The invention's metering CO2 releasing system may be triggered by an electronic or a thermostatic valve or may be triggered manually or by an electronic solenoid.

Abstract: An accumulator having a case which forms a space in which liquid refrigerant and gaseous refrigerant are accommodated, a suction pipe connected to a first side of the case, a connection pipe that connects a second side of the case to a suction side of the compressor, and a gas-liquid separation pipe disposed inside the case to guide the gaseous refrigerant to the connection pipe, and in which the gas-liquid separation pipe is disposed inside the case and is separated from the connection pipe.

Abstract: A refrigeration cycle apparatus in which working refrigerant is a zeotropic refrigerant mixture containing at least a first refrigerant and a second refrigerant having a higher boiling point than the first refrigerant at the same pressure, the refrigeration cycle apparatus including at least a main passage in which a compressor, a first heat exchanger, a first expansion valve, and a second heat exchanger are sequentially connected, the first refrigerant having a property of disproportionation, the first refrigerant having a smaller composition ratio in the compressor than a composition ratio of the first refrigerant passing through the main passage.

Abstract: An apparatus includes a compressor, a load, a heat exchanger, and a heater. The compressor compresses a refrigerant. The load uses the refrigerant to remove heat from a space proximate the load. The load sends the refrigerant to the compressor. The heat exchanger receives the refrigerant from the compressor. The heat exchanger transfers heat from a fluid to the refrigerant. The heat exchanger discharges the refrigerant to the compressor. The heater adds heat to the fluid.

Abstract: The invention provides a solar/air turbine generator system that reduces construction and power generating costs and does not require the use of fossil fuel. A solar/air turbine generator system comprises: a compressor for drawing in and compressing air; a solar receiver for heating the air compressed by the compressor with the use of solar heat collected by a solar collector; an air turbine for driving the compressor and a generator by receiving the compressed air heated by the solar receiver; a regenerative heat exchanger, located between the compressor and the solar receiver, for heating the air compressed by the compressor using the exhaust of the air turbine as a heating medium; and a distribution device, located between the compressor and the regenerative heat exchanger, for distributing the compressed air to the side of the regenerative heat exchanger and to a bypass side, the bypass side being the inlet side of the air turbine.

Abstract: A linear power generator has a gas pressure cylinder structure which causes reciprocating motion of a piston in an axial direction by supplying a high-pressure gas alternately to a left gas chamber and a right gas chamber of a cylinder which includes an electromotive coil, and alternately applying a gas pressure in the left gas chamber and a gas pressure in the right gas chamber to the piston which includes a permanent magnet in the cylinder, and which induces power generation of the electromotive coil by way of reciprocating motion of the piston which has the permanent magnet in the axial direction. The linear power generator encourages movement of the piston by supplying a first high-pressure gas into the left gas chamber and the right gas chamber, and keeps moving the piston by supplying a second high-pressure gas for supplementing the first high-pressure gas into the left gas chamber and the right gas chamber.

Abstract: The present invention provides a method for open-loop controlling or closed-loop controlling and/or monitoring a device with an expansion engine which is supplied live steam of a working medium that is expanded to exhaust steam in the expansion engine comprising the steps: determining at least one physical parameter of the exhaust steam; determining at least one physical parameter of the live steam based on the determined at least one physical parameter of the exhaust steam; and open-loop controlling or closed-loop controlling and/or monitoring the device based on the at least one determined physical parameter of the live steam. A thermal power plant is also provided in which the method is realized.

Abstract: A body part of a decompression device has a swirl space for swirling a refrigerant that flows from a refrigerant inlet, and a refrigerant outlet that is positioned on an extension line of a swirl center line of the refrigerant and functions as a throttle. Further, a passage cross-sectional area of the refrigerant inlet is configured to be smaller than a twelve-fold value of a passage cross-sectional size of the refrigerant outlet, such that a swirl speed of the refrigerant in the swirl space is increased so as to enable a decompression boiling of the refrigerant around the swirl center line. In such manner, a gas-liquid mixture phase refrigerant securely flows into the refrigerant outlet, and it restricts a fluctuation of a flow amount of the refrigerant flowing toward a downstream side without complicating a cycle structure.

Abstract: A refrigeration apparatus includes a compressor, two or more cylinders coupled with the compressor, and an airproof container enclosing the cylinders and filled with air or other gas. Each cylinder is provided with a piston, an inlet valve coupled with the compressor, and an outlet valve coupled with a condenser. When inlet valves are open, outlet valves are closed, and pistons move from bottom to top of cylinders, refrigerant flows from compressor into cylinders through inlet valves; and when inlet valves are closed and outlet valves are open, refrigerant flows from cylinders into condenser through outlet valves. Then, air pressure in cylinders drops, and pressure in airproof container forces pistons to move to the bottom of cylinders. The pressure in airproof container is utilized by cylinders to produce electrical energy.

Abstract: A mixing portion that mixes an injection refrigerant and a suction refrigerant is formed in a range of an internal space of a heating-side body portion of a heating-side ejector from a refrigerant injection port of a heating-side nozzle portion to an inlet of a heating-side diffuser. Further, the mixing portion is formed in a shape that gradually decreases a refrigerant passage area toward a downstream side of a refrigerant flow, and a refrigerant passage area of the inlet of the heating-side diffuser is set smaller than that of the refrigerant injection port. Thus, the flow velocity of the mixed refrigerant is decelerated to a value lower than a two phase sound velocity within the mixing portion, thereby suppressing occurrence of shock wave in the heating-side diffuser and stabilizing the pressure increasing performance in the heating-side diffuser.

Abstract: A heat exchange apparatus (300) includes a first heat exchanger (14), an ejector (11), a first extractor (12), a first pump (13), and a liquid path (15). The ejector (11) produces a merged refrigerant flow using a refrigerant vapor and a refrigerant liquid flowing from the first heat exchanger (14). The first extractor (12) receives the merged refrigerant flow from the ejector (11), and extracts the refrigerant liquid from the merged refrigerant flow. The first pump (13) is provided in the liquid path (15). The refrigerant liquid is pumped by the first pump (13) from the first extractor (12) to the ejector (11).

Abstract: Methods and systems for controlling an electric motor are provided herein. The system is configured to be coupled to a power supply. The electric motor system includes a rectifier, an electric motor, and a microcontroller. The rectifier is configured to convert an alternating current (AC) voltage input to a direct current (DC) voltage. The microcontroller is configured to extract power from a generator device.

Abstract: A refrigeration system having a main circuit including a main compressor thermally coupled with a secondary or subcooling circuit. The main circuit uses a HFC blend, such as but not limited to, R125/R143A blend or R32/R125/R134A blend as a refrigerant and the subcooling circuit uses an R32 blend. Some embodiments may include more than one main compressor. Some embodiments of the secondary circuit may include more than one secondary compressor. The combined system of differing refrigerants provides increased efficiencies and reduced Global Warming Potential (GWP) over single refrigerant systems for low and medium temperature refrigeration applications.

Abstract: A cooling system particularly suitable for use on board an aircraft includes a cooling circuit allowing circulation of a two-phase refrigerant therethrough. An evaporator in the cooling circuit has a refrigerant inlet and a refrigerant outlet. A condenser in the cooling circuit has a refrigerant inlet and a refrigerant outlet. A detection device is configured to output a signal indicative of the state of aggregation of the refrigerant in a connecting portion of the cooling circuit which connects the refrigerant outlet of the evaporator to the refrigerant inlet of the condenser. A control device is configured to control at least one of the temperature and the pressure of the refrigerant in the connecting portion of the cooling circuit in dependence on the signal output by the detection device such that the refrigerant in the connecting portion of the cooling circuit is maintained in its gaseous state of aggregation.

Abstract: The present invention envisages a hybrid absorption-compression chiller comprising: a vapor-compression system providing refrigeration effect in a primary evaporator (102a) by extracting heat from a medium to be cooled in a condensed primary refrigerant, and a vapor-absorption system in operative communication with the vapor-compression system for receiving primary refrigerant vapors via a compressor (104a), these vapors are cooled by a condensed secondary refrigerant in a secondary evaporator (106a) to provide cold condensed primary refrigerant which is recycled to the vapor-compression system. The hybrid absorption-compression chiller of the present invention is energy-efficient and provides a higher COP in comparison with the conventional chillers.

Abstract: Disclosed is a heat exchanger of a plate type comprising an evaporator having at least one inlet and at least one outlet allowing a first medium to enter into and exit from the evaporator. The evaporator comprises a plurality of interconnected evaporation chambers disposed in parallel, having at least one common inlet and at least one common outlet allowing the first medium to enter into and exit from the evaporation chambers.

Abstract: A heat exchanger may be associated with a heat transfer system to promote flow of heat energy from a heat source to a multi-phase fluid. The heat exchanger may be associated with an expansion portion. The fluid may be a refrigerant to which nano-particles may be added. Embodiments of the present invention may be implemented in an air-conditioning system as well as a water heating system.

Abstract: A universal heat engine is disclosed for converting energy from an input heat source to an output. The universal heat engine comprises a heat engine section and an output section. The heat engine section includes a heat engine bore receiving a heat engine piston. A heat engine valve assembly communicates with the heat engine bore for effecting reciprocal motion of the heat engine piston. The output section includes an output bore receiving an output piston. A piston rod interconnects the heat engine piston to the output piston. A control controls the heat engine valve assemblies to operate the heat engine section in accordance with a desired output from the output section. The heat source may comprise the burning of a petroleum product, a solar heat source, geothermal heat source or a byproduct heat source. The output may comprise a static or mobile air conditioning system or an electrical generator.

Abstract: Disclosed herein is a cooling system that utilizes a supersonic cooling cycle. The cooling system includes accelerating a compressible working fluid, and may not require the use of a conventional mechanical pump. The cooling system accelerates the fluid to a velocity equal to or greater than the speed of sound in the compressible fluid selected to be used in the system. A phase change of the fluid due at least in part to a pressure differential cools a working fluid that may be utilized to transfer heat from a heat intensive system.

Abstract: A device for controlling the dehydration operation during a freeze-drying treatment comprises a freeze-drying chamber (1) connected to a vacuum line, and a gas analyzer, for analyzing the gases contained in the chamber. The gas analyzer comprises a gas ionization system (8) comprising a plasma source (13) in contact with the gases, which plasma source is combined with a generator (15) capable of generating a plasma from said gases, and a system for analyzing the ionized gases, comprising a radiation sensor (17) located close to the plasma generation zone and connected to an apparatus (18) for analyzing the change in the radiative spectrum emitted by the plasma. According to the invention, the device includes a means (16) for repeatedly turning the plasma source (13) on and off. The device may further include an optical port (25) placed between the gas ionization system (8) and the freeze-drying chamber (1).

Abstract: A supersonic cooling system operates by pumping liquid. Because the supersonic cooling system pumps liquid, the compression system does not require the use of a condenser. The compression system utilizes a compression wave. An evaporator of the compression system operates in the critical flow regime where the pressure in an evaporator tube will remain almost constant and then ‘jump’ or ‘shock up’ to the ambient pressure.

Abstract: A turbo compressor is provided with a first compression stage that draws in and compresses a fluid, and a second compression stage connected to the first compression stage via a rotation shaft, that further compresses the compressed fluid from the first compression stage. The first compression stage and the second compression stage are arranged adjacent to each other with their backsides facing each other. A discharge port of the first compression stage, and a suction port of the second compression stage are formed in the same plane, and there is provided a U-shaped pipe that connects the first discharge port and the second suction port.

Abstract: The present disclosure provides for a method and apparatus of providing air conditioning from a waste heat source. A vapor state expander is provided producing mechanical work, and a compressing unit is at least partially operative responsive to the mechanical work output of the vapor state expander. In another exemplary embodiment a second liquid state expander producing mechanical work is further provided, the compressing unit operative further responsive to the mechanical work of the liquid state expander. The apparatus disclosed is further capable of providing backup heating and cooling from an additional power source when the waste heat source is insufficient.

Abstract: An ejector (200; 300; 400; 600) has a primary inlet (40), a secondary inlet (42), and an outlet (44). A primary flowpath extends from the primary inlet to the outlet. A secondary flowpath extends from the secondary inlet to the outlet. A mixer convergent section (114) is downstream of the secondary inlet. A motive nozzle (100) surrounds the primary flowpath upstream of a junction with the secondary flowpath. The motive nozzle has an exit (110). The mixer has a downstream divergent section down-stream of the convergent section and having a divergence half angle of 0.1-2.0 over a first span of at least 3.0 times a minimum diameter of the mixer.

Abstract: This application discloses devices, articles, and methods useful for producing lyophilized cakes of solutes. The devices and articles provide for a method of freezing liquid solutions of the solute by the top and the bottom of the solution simultaneously. The as frozen solution then provides a lyophilized cake of the solutes with large and uniform pores.

Abstract: A heat exchanger includes a heat exchanging section for performing heat exchange between a refrigerant and a cooling medium and a passage section. The passage section includes a first passage and a second passage for supplying the refrigerant to the heat exchanging section and a supply passage for supplying the refrigerant to the first passage and the second passage. The first passage and the second passage define a first opening portion and a second opening portion opening at an end of the supply passage. A minimum distance between an opening edge of the first opening portion and an inner surface of the supply passage is equal to a minimum distance between an opening edge of the second opening portion and the inner surface of the supply passage.

Abstract: A refrigerant vapor compression system includes a compression device, a heat rejecting heat exchanger, an economizer heat exchanger, an expander and an evaporator disposed in a refrigerant circuit. An evaporator bypass line is provided for passing a portion of the refrigerant flow from the main refrigerant circuit after having traversed a first pass of the economizer heat exchanger through the expander to partially expand it to an intermediate pressure and thence through a second pass of the economizer heat exchanger and into an intermediate pressure stage of the compression device. An economizer bypass line is also provided for passing a portion of the refrigerant from the main refrigerant circuit after having traversed the heat rejecting heat exchanger through a restrictor type expansion device and thence into the evaporator bypass line as liquid refrigerant or a mix of liquid and vapor refrigerant for injection into an intermediate pressure stage of the compression device.

Abstract: A battery cooling system operates by pumping liquid through a cooling fluid circulation path. Because the battery cooling system pumps liquid, the compression system that generates the cooling power does not require the use of a condenser. The compression system utilizes a compression wave. An evaporator of the cooling system operates in the critical flow regime in which the pressure in an evaporator tube will remain almost constant and then ‘jump’ or ‘shock up’ to an increased pressure.

Abstract: Refrigerating device formed by a main compressor (190), a condenser (140) downstream of and in fluid communication with the main compressor (190), main expansion means (170) downstream of the condenser (140) and an evaporator (180) downstream of and in fluid communication with the main expansion means (170), which also comprises a turbocompressor unit (160) in fluid communication between the evaporator (180) and the main compressor (190) and a heat exchanger (150, 152) having a hot branch (150c) connected upstream, via an inlet line (145), to the condenser (140) and downstream, via an outlet line (149), to the main expansion means (170) and a cold branch (15Of) connected, upstream, to an expansion means (142, 144) mounted on a branch (146) of the line (145) and, downstream, to a turbine portion (162) of the turbocompressor unit (160). The invention also relates to a method for circulating a refrigerating fluid inside the abovementioned device.

Abstract: A heat exchanger may be associated with a heat transfer system to promote flow of heat energy from a heat source to a multi-phase fluid. The heat exchanger may be associated with an expansion portion. The fluid may be a refrigerant to which nano-particles may be added. Embodiments of the present invention may be implemented in an air-conditioning system as well as a water heating system.

Abstract: Overhung axial compressor, chemical reactor and method for compressing a fluid. The overhung axial compressor includes a casing configured to be vertically split along a vertical axis for access to an inside of the casing and a removable cartridge. The removable cartridge is configured to fit inside the casing and to be detachably attached to the casing. The removable cartridge includes a shaft disposed along a horizontal axis, the shaft being configured to rotate about the horizontal axis, a bearing system attached to the removable cartridge and configured to rotationally support a first end of the shaft, and plural blades disposed toward a second end of the shaft such that the second end is overhung inside the casing. The compressor also includes a guide vane mechanism configured to connect to the removable cartridge, the guide vane mechanism being configured to adjust a flow of a fluid to the plural blades.

Abstract: A heat exchanger may be associated with a heat transfer system to promote flow of heat energy from a heat source to a multi-phase fluid. The heat exchanger may be associated with an expansion portion. The fluid may be a refrigerant to which nano-particles may be added. Embodiments of the present invention may be implemented in an air-conditioning system as well as a water heating system.

Abstract: A supersonic cooling system operates by pumping liquid. Because the supersonic cooling system pumps liquid, the compression system does not require the use of a condenser. The compression system utilizes a compression wave. An evaporator of the compression system operates in the critical flow regime where the pressure in an evaporator tube will remain almost constant and then ‘jump’ or ‘shock up’ to the ambient pressure.

Abstract: A supersonic cooling system operates by pumping liquid. Because the supersonic cooling system pumps liquid, the compression system does not require the use of a condenser. The compression system utilizes a compression wave. An evaporator of the compression system operates in the critical flow regime where the pressure in an evaporator tube will remain almost constant and then ‘jump’ or ‘shock up’ to the ambient pressure.

Abstract: A supersonic cooling system operates by pumping liquid. Because supersonic cooling system pumps liquid, the compression system does not require the use a condenser. Compression system utilizes a compression wave. The evaporator of compression system operates in the critical flow regime where the pressure in an evaporator tube will remain almost constant and then ‘jump’ or ‘shock up’ to the ambient pressure.

Abstract: A scroll-type expansion machine includes an expansion mechanism including an orbiting scroll and a first fixed scroll for expanding a refrigerant and recovering a power, a sub-expansion mechanism including an orbiting scroll and a second fixed scroll for compressing the refrigerant by the power recovered by the expansion mechanism, and a seal ring disposed in at least one of an outer circumference portion of the sub-compression mechanism or an outer circumference portion of the expansion mechanism. An oil flow path is opened in an upper space of a hermetic vessel to make the upper space and a lower space at a compressed pressure of the sub-compression mechanism, and the lower space is provided with an oil pipe for communicating with the main compressor.

Abstract: An apparatus for cooling, comprising: a liquid pump for transport of fluid through a heating cycle, an external heat source for heating the fluid in the heating cycle, for example a solar heater directly connected to the heating cycle or connected through a heat exchanger, an expander with an expander inlet and an expander outlet, the expander inlet having a fluid connection to the external heat source for receiving fluid in the gas phase to drive the expander by expanding the fluid, a compressor with a compressor inlet and a compressor outlet, the compressor being driven by the expander for compressing working fluid from a low pressure compressor inlet gas to a high pressure compressor outlet gas, a first heat exchanger with a fluid connection to the compressor outlet and connected to the expander inlet for transfer of heat from the high pressure compressor outlet gas to the fluid in the heating cycle, a second heat exchanger with a condenser for condensing the working fluid from the expander by energy trans

Abstract: Heat-activated heat-pump systems and related methods are disclosed that include a power cycle coupled to a vapor-compression refrigeration cycle both utilizing the same working fluid. The power cycle comprises a boiler, an expander receiving superheated vapor and producing work from the superheated vapor, a condenser, and a pump. A regenerator conducts a first stream of working fluid from the pump to the boiler and a second stream of the working fluid from the expander to the condenser while transferring heat from the second stream to the first stream. The refrigeration cycle comprises a compressor that compresses the working fluid from the evaporator and delivers the compressed working fluid to a condenser. The expander and compressor are coupled together such that at least a portion of the work produced by the expander is utilized for running the compressor.

Abstract: A supersonic cooling system operates by pumping liquid. Because the supersonic cooling system pumps liquid, the compression system does not require the use of a condenser. The compression system utilizes a compression wave. An evaporator of the compression system operates in the critical flow regime where the pressure in an evaporator tube will remain almost constant and then ‘jump’ or ‘shock up’ to the ambient pressure.

Abstract: In an ejector cycle with an ejector including a nozzle for decompressing refrigerant, a control unit controls an air blowing amount of an evaporator fan so that a flow speed of refrigerant flowing in an evaporator becomes in a predetermined flow speed range. Therefore, it can prevent a large amount of lubrication oil from staying in the evaporator, and thereby the lubrication oil can sufficiently returns to a compressor. For example, the control unit includes a determining means for determining the predetermined flow speed range based on at least one of an atmosphere temperature of a condenser, a temperature of air supplied to the evaporator and a flow amount of refrigerant discharged from the compressor.

Abstract: In a refrigeration system, an asymmetric scroll expander has an orbiting scroll element engaged with a fixed scroll element. The orbiting scroll element and fixed scroll element can define a first expansion pocket and a second expansion pocket at positions relative to one another.