Abstract: The present invention is an apparatus that includes a chamber rotor with a chamber and an extension rotor with an extension. The rotors are housed in a rotor case. A pressure cavity is at least transiently formed by the extension rotor and the chamber rotor. The present invention also includes a compressor that includes a chamber rotor with a chamber and an extension rotor with an extension where the extension is adapted to be received in the chamber when the rotors are synchronously rotated. The compressor also includes a power input shaft attached to the extension rotor and a gear assembly attached to the rotors that is adapted to insure the synchronous rotation of the rotors. A rotor case houses the rotors and has an intake port and an exhaust port. The present invention also includes an engine that is similar to the compressor and includes a spark plug. Methods of compressing, pumping and generating electricity and mechanical power are also part of the present invention.

Abstract: The invention relates to a method for cooling or heating a fluid or a body by means of a vapour compression circuit containing a heat transfer fluid, said circuit being at least partially contained in an enclosure, and the relative humidity of the air in the enclosure being less than or equal to a threshold value H1 which is less than 50%, the flammability of the heat transfer fluid at relative humidity H1 being less than the flammability of the heat transfer fluid at 50% relative humidity. The invention also relates to a cooling or heating installation suited to the implementation of this method. The invention also relates to a method of protection against the risks of fire or explosion in an enclosure containing at least partially a vapour compression circuit containing a heat transfer fluid, as well as a method for reducing the GWP of a transfer fluid. The invention also relates to heat transfer fluids suited to the implementation of the above methods.

Abstract: This invention describes a low temperature, self-sustainable desalination process operated under natural vacuum conditions created and maintained by barometric pressure head.

Abstract: A water-cooled air conditioner is provided, and includes an indoor unit, an outdoor unit, a cooling tower, and a boiler. The indoor unit cools or heats a space, and includes a first heat exchanger that performs heat exchange between air and refrigerant. The outdoor unit is installed separately from the indoor unit and includes a second heat exchanger that performs heat exchange between water and refrigerant. The cooling tower is connected to the outdoor unit, and cools water flowing to the second heat exchanger. The boiler is connected to the outdoor unit, and increases a temperature of the water flowing to the second heat exchanger. The second heat exchanger is formed with a plurality of thin plates separated from one another by predetermined gaps through which refrigerant and water flow. The second heat exchanger includes an anti-freezing device that prevents freezing of water within the second heat exchanger.

Abstract: An air-conditioning apparatus includes first and second outdoor units having first and second outdoor heat exchangers and first and second heat source-side degree of subcooling adjustment devices configured to adjust first and second degrees of subcooling in outlet sides of the first and second outdoor heat exchangers, respectively. First and second outdoor-side determination units are configured to determine first and second degrees of subcooling, respectively. A controller is configured to control the first and second heat source-side degree of subcooling adjustment devices, respectively, such that a difference between the first degree of subcooling and the second degree of subcooling is reduced when refrigerant is charged into a refrigerant circuit having the first outdoor heat exchanger and the second outdoor heat exchanger.

Abstract: A distillation column is disclosed. The column includes a plurality of rectification zones and corresponding stripping zones. Each rectification zone is linked to a heat pump or a stage of a heat pump. Overhead material from the top rectification zone is compressed and used to heat bottoms liquid from the bottom stripping zone. Similarly, overhead material from a lower rectification zone is compressed and used to heat liquid taken from the uppermost or top stripping zone. Optionally, overhead material from a middle rectification zone is compressed and used to heat liquid from a middle stripping zone. A single multiple stage heat pump compressor may be utilized as opposed to a plurality of heat pumps. Because the heat exchanger from each rectification-stripping zone pair has a lower duty, economical stab-in heat exchangers may be utilized.

Abstract: A parallel flow heat exchanger system (10, 50, 100, 200) for heat pump applications in which single and multiple paths of variable length are established via flow control systems which also allow for refrigerant flow reversal within the parallel flow heat exchanger system (10, 50, 100, 200), while switching between cooling and heating modes of operation. Examples of flow control devices are an expansion device (80) and various check valves (70, 72, 74, 76). The parallel flow heat exchanger system may have converging or diverging flow circuits and may constitute a single-pass or a multi-pass evaporator together with and a multi-pass condenser.

Abstract: A heat pump system (10) includes a compressor (20), a reversing valve (30), an outdoor heat exchanger (40) and an indoor heat exchanger (50) coupled via refrigerant lines (35, 45, 55) in a conventional refrigeration circuit, and a refrigerant-to-water heat exchanger (60). In the air cooling with water heating mode, the air heating with water heating mode and the water heating only mode, water from a water reservoir (64), such as a storage tank or swimming pool, is passed through heat exchanger (60) in heat exchange relationship with refrigerant passing through line (35). A refrigerant reservoir (70) may be provided for use in refrigerant charge control. A refrigerant line (71) couples reservoir (70) to the refrigerant circuit intermediate the outdoor and indoor heat exchangers for directing liquid refrigerant into the reservoir (70) and a refrigerant line (73) couples the refrigerant circuit upstream of the suction inlet to the compressor (20) for returning refrigerant to the refrigerant circuit.

Abstract: An air conditioning apparatus includes a heat source unit, a first utilization unit, a second utilization unit, a refrigerant communication pipe and a control section. The heat source unit includes a heat source side compressor, a heat source side heat exchanger and a heat source side expansion mechanism. The first utilization unit includes a first utilization side compressor, a first utilization side heat exchanger and a first utilization side expansion mechanism. The second utilization unit includes a second utilization side compressor, a second utilization side heat exchanger and a second utilization side expansion mechanism. The control section is configured to control the first utilization side compressor and the first utilization side expansion mechanism in accordance with operation load of the first utilization unit, and to control the second utilization side compressor and the second utilization side expansion mechanism in accordance with operation load of the second utilization unit.

Abstract: An electric energy saving equipment comprising a coolant compressor, a heat pump, a four way valve, a heating/cooling heat exchanger, an expansion valve, four check valves, an indoor unit of split type air conditioner and piping system for assembling the aforesaid parts and components, which structural improvement for electric energy saving is employed the four check valves to control the coolant to flow or to stop flow in different pipes and then to form an electric energy saving equipment possessing the function of waste heat recovery, house cooling, house heating, indoor air conditioning, indoor heating and dehumidification.

Abstract: According to one embodiment, a heat source unit apparatus includes air heat exchangers, each includes a plurality of fins arranged at prescribed intervals, heat exchanging pipes penetrating the fins, and bent strips extending at sides and bent in the same direction, and a heat exchange module includes two air heat exchangers, each having the bent strips opposed to those of the other air heat exchanger, the air heat exchangers being inclined such that lower edges are close to each other and upper edges are spaced apart, whereby the heat exchange module is shaped like a letter V as seen from side.

Abstract: A thermal cycling system includes a structure defining a load space, a heating assembly positioned to heat to the load space, and a cooling assembly positioned to cool the load space. The cooling assembly includes a refrigeration circuit and a banking circuit. The refrigeration circuit has a compressor, a refrigeration condenser, a first refrigeration evaporator in direct thermal communication with the load space, a second refrigeration evaporator in parallel with the first evaporator, and primary refrigerant circulating throughout the refrigeration circuit. The banking circuit is gravity fed and includes a banking condenser, a banking evaporator positioned to cool the load space, and a banking refrigerant circulating throughout the banking circuit. The banking condenser includes a collection reservoir to store liquid banking refrigerant and is in thermal communication with the second refrigeration evaporator.

Abstract: heating pump is provided that has a plurality of heat transfer devices, each having at least one first zone and one second zone for displacing an operating resource arranged in the heat transfer device based on thermodynamic state variables. Each of the heat transfer devices are thermally connectable by the first zone thereof to a first flow channel through which a first fluid can flow and by a second zone thereof to a second flow channel through which a second fluid can flow, so that heat energy can be exchanged between one of the fluids and one of the zones. The flow channels of one of the zones can be interconnected to one another sequentially by a valve arrangement and an interconnecting sequence changes in the course of an operation of the heat pump by the valve arrangement.

Abstract: To realize a CO2 heat pump system in which reduction in coefficient of performance of heat pump cycle is prevented by maintaining the temperature of the water supplied to the gas cooler of the CO2 heat pump below a certain temperature and raising heat source side temperature in the evaporator, and which has functions to supply a heat source not only to hot water supplying equipment but also to supply a heat source or coolness source to air conditioning equipment or others, the system comprises a low temperature water tank 6, a high temperature water tank 9 for storing high temperature water heated in a gas cooler 3, piping 10, 12 for supplying the high temperature water to hot water supplying equipment and room heating equipment respectively, a first heat exchanger 21 in which brine (water) for supplying latent heat of vaporization of CO2 refrigerant to the refrigerant in the evaporator 5 exchanges heat with heat giving fluid (fluid from which heat is withdrawn), a second heat exchanger located upstream of th

Abstract: The invention relates to a heat exchanger unit having an evaporator device configured for evaporating a heat exchanger operating fluid, and a condenser device for condensing the heat exchanger operating fluid, wherein the evaporator device and the condenser device are fluidically connected to each other in a frontal configuration. The invention further relates to a thermotechnical system having a plurality of heat exchanger units.

Abstract: To provide a heat pump apparatus, such as a heat pump water heating apparatus, capable of efficiently supplying high-temperature water by increasing a condensation capacity to a maximum if the outside air temperature is low. The heat pump water heating apparatus is configured to include a first refrigeration cycle and a second refrigeration cycle. The first refrigeration cycle is configured to connect in series a main compressor, a first water-refrigerant heat exchanger, an internal heat exchanger, a first pressure reducing device, and an air heat exchanger. The second refrigeration cycle diverges from the first refrigeration cycle between the first water-refrigerant heat exchanger and the first pressure reducing device, and joins the first refrigeration cycle between the main compressor and the first water-refrigerant heat exchanger.

Abstract: Chemical heat pump comprising an active surface. A chemical heat pump working according to the hybrid principle with an active substance and a volatile liquid whereby the active substance is in a reactor part 1 and the volatile liquid is in a condenser/evaporator part 3, while the volatile liquid is moving between these parts 1, 3 to be absorbed and desorbed by the active substance and be condensed and evaporated in the condenser/ evaporator part. The reactor part may comprise a layer 12 for the active substance so that this at least in its liquid phase is retained in the layer and the condenser/evaporator part may comprise a layer 13 for the volatile liquid so that this in its liquid phase is retained in the layer. Advantages of a falling film process are combined with the advantages of a matrix material in a chemical heat pump.

Abstract: Techniques for transferring heat from a heat source to a heat destination, and systems for transferring heat from a heat source to a heat destination are provided. More particularly, techniques and systems for transferring heat by utilizing one or more electrocaloric heat pumps are provided. An example heat pump may include an electrocaloric element for receiving heat from a heat source, and a chamber containing a phase change material, an evaporator and a condenser. Upon altering the voltage applied to the electrocaloric element, the phase change material may transform from a liquid state to a vapor state to transfer heat away from the heat source.

Abstract: A modular water source geothermal heat pump unit is provided. The water source geothermal heat pump unit comprises separate fan, compressor and coil modules. In one embodiment, the compressor module may be located between the fan and coil modules. In another embodiment the water source geothermal heat pump unit may be a monolithic unit that includes a fan that directs air through a chute located adjacent a compressor. The chute may also be located between the fan and a coil.

Abstract: A heat pump-type hot water feeding apparatus includes a cooling cycle circuit, a heat storage tank, and a hydro kit heat exchanging unit, wherein the hydro kit heat exchanging unit is connected to the cooling cycle circuit, wherein during a heat storage mode operation that stores heat in the heat storage tank, heat of the first heat transfer fluid, which is heat exchanged in the first heat exchanger, is stored in the heat storage tank or heat of the first heat transfer fluid, which is heat exchanged in the first heat exchanger and heat of the second heat transfer fluid, which is heat exchanged in the second heat exchanger, are simultaneously stored in the heat storage tank.

Abstract: Apparatus (10?) for use as a heat pump comprising: compression chamber means (40?); inlet means (30?) for allowing gas to enter the compression chamber means; compression means (60?) for compressing gas contained in the compression chamber means; heat exchanger means for receiving thermal energy from gas compressed by the compression means; expansion chamber means (124?) for receiving gas after exposure to the heat exchange means; expansion means (120?) for expanding gas received in the expansion chamber means; and exhaust means (100?) for venting gas from the expansion chamber means after expansion thereof.

Abstract: The method to improve the heating temperature of heat pump and the second-type high temperature absorption heat pump both belong to the field of heat pump technology. We can get the corresponding second-type high temperature absorption heat pump based on the second-type low temperature absorption heat pump as following ways. In the second-type low temperature absorption heat pump, we add the new added steam bleeding chamber, the new added absorber, then new added throttle or the new added liquid refrigerant pump, the new added solution pump and the new added solution heat exchanger. And some pipes are connected in a reasonable way. Or we adjust the connection of some pipes too. Then we can achieve correspondingly the three-stage high temperature second-type absorption heat pump or the high temperature second-type absorption heat pump with multi-terminal heating or the recuperative high temperature second-type absorption heat pump by combining some other components.

Abstract: In a refrigerating air conditioning system using refrigerant such as CO2 used in a supercritical area, a highly efficient refrigerating air conditioning system is provided by adjusting the amount of refrigerant in a radiator which contributes to the efficiency of the system stably and quickly. During heat utilizing operation, the superheat at the exit of an evaporator is controlled to a predetermined value by controlling the opening of an expansion valve provided on the upstream side of the evaporator, and an expansion valve is controlled so that the state of refrigerant in a connection pipe on the high-pressure side becomes a supercritical state. In this state, a flow rate control valve is controlled to change the density of the refrigerant stored in a refrigerant storage container and the amount of refrigerant existing in the radiator is adjusted.

Abstract: An optional unit (30) including a high pressure side compressor (31) and a gas-liquid separator (33) is provided between an outdoor unit (20) including a low pressure side compressor (21) and an indoor unit (40). During a defrosting operation, refrigerant discharged from the low pressure side compressor (21) defrosts an outdoor heat exchanger (21) while refrigerant in the gas-liquid separator (33) is sucked into the high pressure side compressor (31) and is then discharged to the suction side of the low pressure side compressor (21). The optional unit (30) includes an injection pipe (36) for returning part of the refrigerant discharged from the high pressure side compressor (31) to the suction side of the high pressure side compressor (31) in the defrosting operation. Hence, the refrigerant flowing into the high pressure side compressor (31) from the gas-liquid separator (33) is gasified by the high-temperature discharged refrigerant.

Abstract: An apparatus for storing and dispensing wine comprises a housing formed substantially in the shape of a wine barrel. The housing including a circumferential wall, a first closed end and a second open end. A spigot for selectively dispensing wine is supported by and positioned through the first closed end of the housing. A removable insert disposable within the housing through the second open end contains a collapsible bladder of wine. A wine dispensing port is contained within the bladder and insert. With the insert positioned within the housing, the port is positioned proximate the second open end thereof. A conduit in fluid communication with the spigot extends from the first closed end toward the second open end. Upon disposing the insert within the housing, the conduit is connectable to the port wherein the wine can be selectively dispensed from the spigot.

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 heating device includes a low-temperature heat store thermally coupled to a heat pump. The heat store is a buried pocket containing a permeable material and water. A high heat exchange capacity is thus achieved by exploiting both the high specific heat of the water and the high latent heat of liquefaction of the water contained in the heat store.

Abstract: A heat pump capable of performing heating and cooling simultaneously is provided. The heat pump includes a compressor, indoor devices that heat or cool an indoor space, outdoor heat exchangers, and switching devices. The outdoor heat exchangers are configured to individually operate as a condenser or an evaporator depending on a ratio of heating to cooling of the indoor devices. When an operation mode is changed, continuous heating and cooling is performed without stopping the system.

Abstract: This invention describes a low temperature, self-sustainable desalination process operated under natural vacuum conditions created and maintained by barometric pressure head.

Abstract: A heat pump system (10) includes a compressor (20), a reversing valve (30), an outdoor heat exchanger (40) and an indoor heat exchanger (50) coupled via refrigerant lines (35, 45, 55) in a conventional refrigeration circuit, a refrigerant to liquid heat exchanger (60), a refrigerant to liquid heat exchanger bypass valve (130), an outdoor heat exchanger bypass valve (230), and an indoor heat exchanger bypass valve (330). A controller (100) is provided to selectively control the respective positioning of the valves (30, 130, 230 and 330) between their respective open and closed positions so as to selectively configure the refrigerant circuit for operation in one of an air cooling only mode, an air cooling with liquid heating mode, an air heating only mode, an air heating with liquid heating mode, and a liquid heating only mode.

Abstract: An air conditioner performs a refrigerant quantity judging operation to judge the refrigerant quantity in a refrigerant circuit, and includes a heat source unit, utilization units, expansion mechanisms, a first refrigerant gas pipe, a second refrigerant gas pipe, a refrigerant liquid pipe, switching mechanisms, a temperature detector, and a controller. The heat source unit includes a compressor and a heat source side heat exchanger. The first refrigerant gas pipe is connected to the discharge side of the compressor. The switching mechanism can switch between a first state and a second state. The temperature detector is mounted on the first refrigerant gas pipe, and configured to detect a refrigerant temperature on the first refrigerant gas pipe side and output a refrigerant temperature detection value. The controller corrects the refrigerant quantity judged by a refrigerant quantity judging operation based on the refrigerant temperature detection value.

Abstract: A heat exchanger 21 is provided with a metal tube 47 that has a support member 55 inhibiting deformation in the thickness direction in a fluid flow channel 53, and a multiple-hole metal tube 45 that is stacked on one side of the metal tube 47 in the thickness direction and has an opposing surface disposed opposite an outer surface 61 on the one side of the metal tube 47 and joined by at least part thereof to the outer surface 61 on the one side.

Abstract: A humidity control system (10) is disclosed which includes a refrigerant circuit (60). The refrigerant circuit (60) includes first and second absorbent-supported heat exchangers (61, 62) and performs a refrigeration cycle by the circulation of refrigerant. In addition, in the refrigerant circuit (60), the circulation direction of refrigerant is reversible. The first and second heat exchangers (61, 62) are disposed in a casing (11). In the humidity control system (10), the distribution route of air is changed such that a first air stream is passed through either one of the first and second heat exchangers (61, 61) that is functioning as an evaporator while a second air stream is passed through the other heat exchanger that is functioning as a condenser. A compressor (63), an expansion mechanism (65), and a four-way valve (64) in the refrigerant circuit (60) are disposed together with the heat exchangers (61, 62) in the casing (11).

Abstract: A heat pump HVAC system with an integrated pressure reducer which reduces the head pressure of the system when operating in the cooling mode and thus reduces compressor workload. The heat pump HVAC system includes a compressor for compressing a refrigerant, an exterior coil positioned outside of a building, an interior coil positioned within the building, and a reversing valve for changing the flow direction of refrigerant in the refrigerant circuit. A heat exchanger is provided between the outlet of the exterior coil and the thermal expansion valve. The heat exchanger cools the refrigerant flowing between the outlet of the exterior coil and thermal expansion valve using refrigerant exiting the interior coil.

Abstract: Heat pump assembly for seasonal balancing of temperatures in buildings, includes a heat pump (1) having a cold side and a warm side, respectively. The heat exchangers (2, 3) are connected to the cold and the warm side, respectively, in that one of the heat exchangers (3) is connected to a heating/cooling element (4), in that the other heat exchanger (2) is connected to a heat/cold buffer (6), in that the heat pump (1) is of the type liquid-liquid, and in that a valve assembly (7) is arranged in the heat pump (1) to optionally connect the warm or cold side of the heat pump (1) to the heating/cooling element (4), whereby the heating/cooling element (4) optionally may heat or cool.

Abstract: A lignocellulosic biomass saccharification pre-treatment device is provided, which is capable of easily recovering ammonia water to be used in a pre-treatment for saccharification of a lignocellulosic biomass and putting in recycle use. The lignocellulosic biomass saccharification pre-treatment device has a mixing unit 2 for mixing lignocellulosic biomass and ammonia, a heating unit 3 for heating the biomass-ammonia mixture, a separation unit 4 for separating ammonia gas from the biomass-ammonia mixture to obtain a biomass-water mixture, and a transfer unit 6 for transferring the biomass-water mixture to a later process 5.

Abstract: A liquid-based cooling system provides a method of supplying a heated coolant fluid at a relatively constant temperature and pressure to one or more heat driven engines, such as adsorption chillers or heat pumps, by utilizing a proportional flow control device in association with each of a plurality of heat-producing electronic components to optimize the output of a plurality of liquid-cooled cold plates operatively mounted on such plurality of heat-producing electronic components. The proportional flow control devices may be electro-mechanical or solid state proportional control valves for water flow control. The proportion flow control devices are operatively connected to be actuated based upon the electrical signals typically generated to control the variable cooling fans of the electronic components.

Abstract: A heat pump system of the type which re-circulates refrigerant through a fluid circuit between a first heat exchanger and a second heat exchanger includes a compressor coupled to the fluid circuit and a vapor injection system including a vessel fluidly coupled to the first and second heat exchangers and to a vapor injection port of the compressor. The vessel is operable as a receiver in a cooling mode of the heat pump system and is operable as a flash tank in a heating mode of the heat pump system.

Abstract: A heat pump cycle system and a method for providing combined cooling and heating supply are disclosed. The heat pump cycle system comprises a working medium reservoir, an absorbing solution reservoir, and a compression heat pump. The upper portions of the working medium reservoir and the absorbing solution reservoir are connected by a gas passage. The compression heat pump comprises a compressor, a condenser, a throttle valve and an evaporator, all of which are connected by a steam pipeline accordingly. The working medium reservoir contains a working medium and further comprises a first heat exchanger, and the evaporator. The absorbing solution reservoir contains an absorbing solution and further comprises a second heat exchanger and the condenser. The system utilizes electricity during the electricity consumption trough, to operate the compression heat pump cycle during the reproducing process.

Abstract: A dispenser of cooled or heated liquid which in one embodiment is a server cart for an aircraft. To avoid the need for a pump, the reservoir has a cooling or heating heat exchanger that helically coils around the main reservoir, which cools from the top down or heats from the bottom up, forming a counter current. The reservoir is connected to at least two conduits, one near the cooler top of the reservoir and one near the relatively warmer bottom of the reservoir. The two conduits connect to one another at a distance from the reservoir forming a dispensing passage, thereby allowing fluid to constantly circulate through the dispensing passage due to difference in the specific gravity in the fluid caused by the temperature difference. The elimination of the pump device is especially desirable for weight sensitive environments such as an aircraft.

Abstract: An improved CHP system combining a VCCHP system with an SOFC system for application as a combined CHP system wherein the compressor motor of a heat pump is powered by a portion of the electricity generated by the SOFC, and wherein the thermal output of the heat pump is increased by abstraction of heat from the SOFC exhaust. This integration allows for complementary operation of each type of system, with the benefits of improved overall fuel efficiency for the improved CHP system. The heat pump is further provided with a plurality of flow-reversing valves and an additional heat exchanger, allowing the heat pump system to be reversed and thus to operate as an air conditioning system.

Abstract: Disclosed is a high speed defrosting heat pump having a closed refrigerant circulation loop including a four-way valve so as to conduct cooling and heating operations by switching a refrigerant-circulating direction by means of the four-way valve. A three-way valve is disposed on a refrigerant pipe connected between a compressor and the four-way valve, and a bypass pipe is branched off from the three-way valve in such a manner as to be connected to a refrigerant pipe connected between an expansion valve and a exterior heat exchanger, such that the hot gas discharged from the compressor is introduced to the exterior heat exchanger via the bypass tube by the control of the three-way valve.

Abstract: A heating system with recovery of waste water heat, of the type comprising a heat pump, a waste water holding vat comprising a casing defining an internal space for holding the waste water; and a heat exchanger to recover calories in the holding vat and use them in the heat pump. The holding vat comprises at least one baffle extending in the holding space and dividing the holding vat into a plurality of compartments and defining, with the casing, a waste water flow path that bypasses the baffles and passes into the compartments, the heat exchanger being positioned so as to recover calories in at least two compartments.

Abstract: To prevent the decline in the volumetric efficiency and the decline in the performance of the heat pump having the reciprocating compressor integrated therein by decreasing the temperature of discharge gas in the reciprocating compressor with a simple construction, a heat pump unit 1 constituting a heat pump cycle in which the reciprocating compressor 3, a condenser 5, an expansion valve 7 and an evaporator 8 are interposed in a refrigerant circulating path 2, comprises a refrigerant-liquid returning path 9 for returning a portion of the refrigerant liquid having been condensed by the condenser 5 to a discharge chamber provided in a cylinder top assembly 20 of the reciprocating compressor 3 so that a portion of the refrigerant liquid is supplied to the discharge chamber 36 via the refrigerant-liquid returning path 9 and a discharge gas passageway 36a is cooled by evaporative latent heat of the refrigerant liquid.

Abstract: A distillation column is disclosed with a folded design. The column includes a plurality of rectification zones and corresponding stripping zones Each rectification zone is linked to a heat pump or a stage of a heat pump. Overhead vapor from the top rectification zone is compressed and used to heat bottoms liquid from the bottom stripping zone. Similarly, overhead vapor from the middle rectification zone is compressed and used to heat liquid from a middle stripping zone and overhead from a lower rectification zone is compressed and used to heat liquid taken from the uppermost or top stripping zone. A single multiple stage heat pump compressor may be utilized as opposed to a plurality of heat pumps Because the heat exchanger from each rectification-stripping zone pair has a lower duty, economical stab-in heat exchangers may be utilized.

Abstract: A method for operating a ducted fumehood with increased energy efficiency, wherein the method comprises: passing exhaust air from the ducted fumehood through a heat exchanger, and passing other air through the heat exchanger, so as transfer heat content from the exhaust air to the other air, or to transfer heat content from the other air to the exhaust air, so as to temperature-condition the other air.

Abstract: Heat exchangers of a refrigerant circuit 50 are constructed of a first adsorption heat exchanger 51 and a second adsorption heat exchanger 52, both of which have an adsorbent supported thereon, and are constructed so as to be switched into an evaporator and a condenser. An air passage 60 is constructed so as to be switched into states in which air flowing from the outside of a room to the inside of the room and air flowing from the inside of the room to the outside of the room flow through either of the first adsorption heat exchanger 51 and the second adsorption heat exchanger 52.

Abstract: An air conditioning apparatus has plural indoor units having: plural heat exchangers; and flow controllers respectively corresponding to the heat exchangers. In each of the indoor units, one heat exchanger is used as a condenser, and another heat exchanger is used as an evaporator, thereby causing the indoor unit to perform a temperature and humidity controlling operation. An indoor unit(s) which is not set to perform the temperature and humidity controlling operation may be caused to perform a heating operation or a cooling operation. Capacity controls on the condensers and the evaporators are performed by corresponding flow controllers. Gas refrigerants ejected from plural heat exchangers serving as evaporators are joined together, and then distributed to plural heat exchangers serving as condensers.

Abstract: A splitter system is disclosed that produces a product stream from a mixed stream of two materials with similar boiling points. A multi-stage heat pump compressor is used in combination with a bottoms reboiler and an intermediate reboiler resulting in reduced utility consumption. The appropriately placed intermediate reboiler enables use of a lower temperature heat source relative to the bottoms reboiler heat source. As a result, a lower pressure overhead vapor stream can be used to deliver heat to both the intermediate and bottoms reboilers, thereby conserving energy. The first stage of the multi-stage heat pump compressor delivers pressurized overhead vapor to the intermediate reboiler and the second stage provides pressurized overhead vapor to the bottoms reboiler. The disclosed design and method lessens the heat pump compressor power consumption and trim condenser duty for a propylene/propane splitter system by over 20%.

Abstract: It is an object of the present invention to reduce the constraint that the density ratio is constant as small as possible, and to obtain high power recovering effect in a wide operation range. A refrigeration cycle apparatus uses carbon dioxide as refrigerant and has a compressor, an outdoor heat exchanger evaporator, an expander and an indoor heat exchanger a radiator. An injection circuit for introducing high pressure refrigerant is provided in a halfway of an expansion process of said expander.