Abstract: A control system and method for a heating system of an electric vehicle or hybrid vehicle is embodied such that when there is a heating request for a high-voltage accumulator, an HVA heating mode is activated in which the high-voltage accumulator which is connected to an HVA circuit of the heating system is heated by an HVA heating source which is activated for this purpose so that heat is generated in the HVA circuit or transferred into the circuit. When there is a heating request for a passenger compartment of the vehicle, an air-conditioning heating mode is activated in which the passenger compartment is heated by a heating circuit, with heat which is generated in the heating circuit with an auxiliary heater or is transferred into the heating circuit with a heat pump, or both.

Abstract: The invention refers to a system for cooling a process fluid of a heat-producing apparatus, comprising: an outlet of the heat-producing apparatus, the outlet being provided for discharging process fluid to be cooled from the heat-producing apparatus; an inlet of the heat-producing apparatus, the inlet being provided for supplying cooled process fluid to the heat-producing apparatus; and a thermodynamic cycle device, in particular an ORC device, the thermodynamic cycle device comprising an evaporator having an inlet for supplying the process fluid to be cooled from the outlet of the heat-producing apparatus and having an outlet for discharging the cooled process fluid to the inlet of the heat-producing apparatus, the evaporator being adapted to evaporate a working medium of the thermodynamic cycle device by means of heat from the process fluid; an expansion machine for expanding the evaporated working medium and for producing mechanical and/or electrical energy; a condenser for liquefying the expanded working

Abstract: A cooling system for a powertrain includes: a rotating electrical machine unit including a rotating electrical machine; and a power control unit configured to drive the rotating electrical machine. The cooling system includes: a radiator configured to cool a refrigerant; a refrigerant circulation circuit configured to supply the refrigerant flowing out from the radiator to a second cooled portion via a first cooled portion; a bypass flow path bypassing the second cooled portion; a flow control valve configured to adjust the ratio of a second refrigerant flow rate to a first refrigerant flow rate; and a control device configured to control the flow control valve. The control mode of the flow control valve includes a flow rate limiting mode in which the flow control valve is controlled to adjust the ratio such that the second refrigerant flow rate becomes less than the first refrigerant flow rate.

Abstract: A vehicular coolant flow system includes: a main cooling circuit configured to circulate a coolant through a power electronic device mounted on a vehicle so as to cool the power electronic device; a heat-radiating device provided in the main cooling circuit so as to cool the coolant; a bypass circuit that branches off at a point between the power electronic device of the main cooling circuit and the heat-radiating device, bypasses the heat-radiating device, and merges with the main cooling circuit; a heating device connected to the bypass circuit and heated by the coolant that has cooled the power electronic device; a first adjustment valve positioned at a point at which the bypass circuit branches off from the main cooling circuit or merges with the main cooling circuit; and a controller that controls the first adjustment valve so as to adjust a flow rate of the coolant supplied to the bypass circuit.

Abstract: The object of the present invention is a plant and related method for the supply to the end-user, by making use of the heating power transferred by a heat source e.g. gas, oil products, coal or renewable type e.g. biomass, solar, geothermal, simultaneously with electric power and/or mechanical power, heating power and cooling power “Heating-Cooling” operating mode of the plant or simultaneously with electric power and/or mechanical power and heating power only “Heating” operating mode of the plant or simultaneously with electric power and/or mechanical power and cooling power only “Cooling” operating mode of the plant. The operation of the plant, according to each of the three operation modes, is obtained by the regulation of several on-off valves and a flow rate regulation valve.

Abstract: A fuel system for a bi-fuel vehicle, which is provided with an engine and an LPG tank connected to each other through a fuel supply line and a fuel return line through which liquefied petroleum gas (LPG) fuel passes, includes: a 3-way valve which is installed in the fuel return line, and selectively opened and closed to move returning LPG fuel to a canister connected with a fuel tank; and a return tube, which branches off from the fuel return line, installed so that the returning LPG fuel passes through the canister in accordance with an operation of the 3-way valve, allowing the LPG fuel of which the temperature is decreased by heat exchange while the LPG fuel passes through the canister to move to the fuel return line.

Abstract: A heating and cooling system that can efficiently and effectively heat a pool and cool a home simultaneously or independently with one compressor and one condenser. The present invention uses a combination of four-way valves to selectively activate the system's components depending on instructions sent by the home or pool thermostats.

Abstract: A humidity control module, in which liquid absorbent exchanges air and moisture, reduces a temperature change in the liquid absorbent. A humidity control module includes a partition member and a heat transfer member. The partition member separates an air passage from an absorbent passage. The partition member is wholly or partially formed by a moisture permeable membrane. The liquid absorbent flowing through the absorbent passage exchanges the moisture with the air flowing through the air passage via the moisture permeable membrane. The heat transfer member is provided in the absorbent passage and surrounded by the liquid absorbent. A heat medium flowing through the heat transfer member exchanges heat with the liquid absorbent flowing through the absorbent passage.

Abstract: A device optimized with regard to thermal management and an optimized method for the manufacture of containers are described in which the thermal energy of a plurality of consumers/generators of thermal energy is interchanged through a thermal energy combination. The device and the method are particularly suitable for stretch blow-molding machines and compressors.

Abstract: A motor incorporating a power converter including a printed board on which a semiconductor module (an inverter IC), which converts a voltage of an external power supply into a high-frequency voltage and supplies the high-frequency voltage to a stator, is mounted, wherein a high-voltage circuit ground, which is a power ground of a high-voltage main circuit system of the inverter IC, and a low-voltage circuit ground, which is a ground of a control circuit system, which is a low-voltage circuit, of the semiconductor module, are provided on the board, and the high-voltage circuit ground and the low-voltage circuit ground are connected at one point via a resistor.

Abstract: An air-conditioning system for a vehicle includes a heat pump system to heat the vehicle. A viscous heater is disposed within the heat pump system to supplement the heat pump system during a heat mode of the air-conditioning system.

Abstract: Methods are provided for creating and operating data centers. A data center may include an information technology (IT) load and a fuel cell generator configured to provide power to the IT load.

Abstract: To provide an air-conditioning hot-water supply complex system that can simultaneously process a cooling load, a heating load, and a high-temperature hot-water supply load to provide a stable heat source all through the year. The air-conditioning hot-water supply complex system provides a bypass pipe in which a bypass electromagnetic valve is installed in parallel with a heating medium-refrigerant heat exchanger between a gateway of refrigerant piping of the heating medium-refrigerant heat exchanger to control an inflow amount of the refrigerant for hot-water supply to the heating medium-refrigerant heat exchanger by making the refrigerant for hot-water to flow into a bypass pipe by opening and closing the bypass electromagnetic valve.

Abstract: A hot-water storage type hot-water supply device includes a heat pump unit (1) for heating water, a hot-water storage tank (21) for storing hot water heated by the heat pump unit (1), and a hot-water supplying heat exchanger (22) placed so as to extend roughly entirely in a vertical direction thereof and which receives water from a lower side thereof and discharges hot water from an upper side thereof.

Abstract: A climate control system having a coolant subsystem, a heat pump subsystem, and an intermediate heat exchanger. The intermediate heat exchanger may transfer thermal energy from the heat pump subsystem to the coolant to increase the temperature of the coolant when the climate control system is in a heating mode.

Abstract: A system (1) and a method for cooling freshly baked bread under sub-pressure, which system includes: a sub-pressure chamber (2) which is adapted for receiving freshly baked bread for the cooling thereof; a sub-pressure source (3), such as a vacuum pump, which is connected to the sub-pressure chamber (2) for exhausting fluid from the sub-pressure chamber (2) and creating a sub-pressure inside it; a condenser (4) for cooling steam exhausted from the sub-pressure chamber and separate condensed water (19) from it. The system also includes a heating tank (5) with a first heat exchanger (6) in which the heat generated by the condenser (4) is used for heating water.

Abstract: Water heater apparatus includes a tank for storing water; a heat exchanger associated with the tank and being operative to receive refrigerant and transfer heat therefrom to the tank, the heat exchanger representatively being a heat conductive tube externally wrapped around the tank in heat conductive contact therewith; air conditioning apparatus operative to utilize refrigerant flowing through a refrigerant circuit portion of the air conditioning apparatus, the refrigerant circuit portion being in fluid communication with the heat exchanger; and a control system operative to selectively cause a portion of the flowing refrigerant to pass through the heat exchanger, or cause essentially the entire flow of the refrigerant to bypass the heat exchanger.

Abstract: A heat pump system for conditioning regeneration air from a space is provided. The heat pump system is operable in a winter mode and/or a summer mode, and may be selectively operated in a defrost mode or cycle. During a defrost mode, hot refrigerant may be used to directly and sequentially defrost the regeneration air heat exchanger. A compressor may be configured to be overdriven during a defrost cycle.

Abstract: A solar liquid-heating-and-cooling system (20) includes: 1. a hot-liquid storage-tank (22); 2. a hot-liquid manifold-tank (26); 3. a coaxial heating-and-cooling-tube (24) that connects downward from the hot-liquid storage-tank (22) to the hot-liquid manifold-tank (26); 4. a double layer heating-and-cooling collector-array-panel (32) located beneath the hot-liquid manifold-tank (26), the panel (32) including, connected to the hot-liquid manifold-tank (26) a. an upper layer of glazed heating-tubes (36); and b. a lower layer of unglazed cooling-tubes (56); 5. parabolic-trough mirror reflectors (64) that are located between the upper and lower layers of tubes (36, 56); 6. cold-liquid manifold-tank (92) located below the panel (32) connected to lower ends both of the glazed heating-tubes (36) and of the unglazed cooling-tubes (56); 7. a cold liquid storage tank (98); and 8.

Abstract: An apparatus includes a mechanical refrigeration cycle arrangement having a working fluid and an evaporator, a condenser, a compressor, and an expansion device, cooperatively interconnected and containing the working fluid. The apparatus also includes a drum to receive clothes to be dried, a duct and fan arrangement configured to pass air over the condenser and through the drum, a sensor located to sense at least one parameter, and a controller coupled to the sensor and/or the compressor. The parameter(s) includes at least one of temperature of the working fluid, pressure of the working fluid, and power consumption of the compressor. The controller is operative to monitor, as a function of time, the parameter(s), determine whether the parameter(s) reaches a predetermined decision condition; and, if the parameter(s) reaches the predetermined decision condition, power down the mechanical refrigeration cycle at least by causing the compressor to shut off.

Abstract: A transport refrigeration system includes a transport refrigeration unit having a refrigerant circuit through which a refrigerant is circulated in heat exchange relationship with air drawn from a cargo box, a fuel-fired engine for powering the refrigeration unit and having an exhaust system through which exhaust gases generated by the engine are discharged and an engine coolant circuit, an engine exhaust gases to engine coolant heat exchanger, and an engine coolant circuit to refrigeration unit heat exchanger.

Abstract: A heat pump system for use in a vehicle having a passenger compartment, and a thermal storage medium is provided. A method for providing heat to a vehicle passenger compartment is also provided. The vehicle may have an electric only vehicle mode wherein the vehicle may occupy one of an active electric drive state and an inactive state. The heat pump system may include a thermal storage medium configured to store heat produced during the inactive state. The thermal storage medium may be a device which has a thermal capacity exchangeable with a fluid medium such as an Rechargeable Energy Storage System (RESS) or a phase change material. The heat stored by the thermal storage medium during the vehicle charge event may be transmitted from the thermal storage medium to the passenger compartment via the heat pump system during the active electric drive state.

Abstract: Embodiments of the present invention include a cooling system and method for cooling a computer rack by circulating liquid coolant through different sections of a rack heat exchanger under separately controlled flow and temperature conditions. In a method according to one embodiment, a first liquid coolant is supplied to a first section of an air-to-liquid heat exchanger. A second liquid coolant is supplied to a second section of the air-to-liquid heat exchanger at a different temperature than the first liquid coolant. Airflow is generated through rack-mounted computer components to the first and second sections of the air-to-liquid heat exchanger. The flow rates of the first and second liquid coolants are independently controlled to enforce a target cooling parameter. The independent operation of the first and second fin tube sections allows for the increased use of un-chilled water without sacrificing heat removal objectives.

Abstract: A heat pump including at least two refrigerant injection flow paths into a scroll compressor and a main circuit. The main circuit includes a scroll compressor, a condenser, an expansion valve, a phase separator, and an evaporator for evaporating refrigerant. The scroll compressor is provided with a first refrigerant injection port between an inlet of the scroll compressor and an outlet of the scroll compressor, and a second refrigerant injection port between the inlet and the first refrigerant injection port. A first refrigerant injection flow path is bypassed from the phase separator. An internal heat exchanger is installed between the phase separator and the evaporator. A second refrigerant injection flow path is bypassed between the phase separator and the internal heat exchanger. The second refrigerant injection flow path is passed through the internal heat exchanger.

Abstract: A system to produce heated and refrigerated working fluids in an electric vehicle comprises a storage material to store and release thermal energy, an off-board energy source to provide thermal energy to said storage material, and a refrigerator. The refrigerator is powered by thermal energy from the storage material to produce refrigeration. Thermal energy is transferred by at least one working fluid. At least one heat exchanger element enables thermal communication between the storage material, the off-board energy source, the refrigerator, and the at least one working fluid. At least one control element to control the flow of said at least one working fluid.

Abstract: An object is to enable the dealer or user of an air conditioning apparatus to recognize that the heat dissipation amount of a heat exchange device is less than the heat dissipation amount expected of the air conditioning apparatus. A control device detects a hot water outflow temperature being a temperature of a fluid heated by a heat pump device, and a return temperature being a temperature of the fluid before being heated by the heat pump device, and checks whether or not a temperature difference between the detected hot water outflow temperature and the detected return temperature is smaller than a predetermined first value. If the control device judges that the temperature difference is smaller than the first value, it displays insufficiency of the heat dissipation amount of a heat exchange device, on a display of a remote controller.

Abstract: The invention relates to a refrigerant circuit (1) for thermally conditioning a vehicle passenger compartment, comprising a plurality of branches containing at least one exchanger, of which branch a first branch (11) is in series with a second branch (12) and a third branch (13), said second branch (12) being in parallel with said third branch (13), and a means (36) of placing the third branch (13) in communication with the second branch (12), said means being installed between a sector (37) of the third branch (13) which sector is situated downstream of an external exchanger (28) and a portion (38) of the second branch (12) which is situated upstream of a first control member (15).

Abstract: A thermal energy system comprising a first thermal system in use having a cooling demand, and a heat sink connection system coupled to the first thermal system, the heat sink connection system being adapted to provide selective connection to a plurality of heat sinks for cooling the first thermal system, the heat sink connection system comprising a first heat exchanger system adapted to be coupled to a first remote heat sink containing a working fluid and a second heat exchanger system adapted to be coupled to ambient air as a second heat sink, a fluid loop interconnecting the first thermal system, the first heat exchanger system and the second heat exchanger system, at least one mechanism for selectively altering the order of the first heat exchanger system and the second heat exchanger system in relation to a fluid flow direction around the fluid loop, and a controller for actuating the at least one mechanism. An alternative embodiment has a heating demand and uses heat sources.

Abstract: A refrigerator is provided that includes a low energy refrigerator heat source. The refrigerator includes a heat source positioned at a source of latent heat. The heat source harvested heat from the source of latent heat and stores said heat in a fluid within that heat reservoir or heat exchanger. The warmed fluid is then supplied via a fluid pathway to an application requiring a heat output. Thus, the heat reservoir provides heat to the application without use of an energy-consuming device, which reduces the energy consumption of the refrigerator.

Abstract: A vehicular heat pump system for controlling the temperature of a passenger compartment and vehicle battery is provided. The heat pump system may include a cooling mode and a heating mode. The components of each of the respective heating and cooling circuits may include: a compressor, an AC condenser, a heat pump condenser, a cabin evaporator, a heat pump evaporator, a receiver/dryer, a plurality of expansion devices, and a plurality of flow control valves. The use of multiple evaporators and condensers eliminates the need to reverse the direction of refrigerant flow upon a change in operating mode; therefore, the position of the low-pressure side of the system remains constant in all operating modes. The low-pressure side of the system is not cooled with ambient air, minimizing the complexity of the system and eliminating the need to interrupt heating mode in order to de-ice the outside heat exchanger.

Abstract: A container material sealing and containing a latent heat storage material is arranged in a ceiling blow chamber box. Then, an air conditioning system of radiation type in which the metal panel is cooled or warmed by using as an auxiliary heat source the latent heat storage material having been cooled or warmed by heat storage achieved by cooling or warming the latent heat storage material with cool or warm air generated by a heat pump air-conditioner and then coolness or warmth is radiated from the metal panel into a room and an air conditioning system of convection type in which cool or warm air generated by the heat pump air-conditioner is blown into the room are provided and then the two air conditioning systems are used simultaneously or alternatively any one alone of the air conditioning systems is used so that air conditioning of the room is performed.

Abstract: Provided is a broadband heat pump system including: a heat pump module including a plurality of heat pumps that supply hot water with different levels of temperature; a heat source supply module that introduces a heat source from one heat source or selectively introduces a heat source from one or a plurality of heat sources among heat sources with different levels of temperature so as to produce a heat source with a desired temperature; and a controller that controls the heat pump module and the heat source supply module to select one from the plurality of heat pumps to be appropriate to a temperature of hot water requested by a demand source and to receive a heat source with a necessary temperature from the heat source supply module so that the selected heat pump is able to supply hot water with the requested temperature.

Abstract: A method of operating a heating, ventilation, and/or air conditioning (HVAC) system includes operating a device to produce at least one of electricity and rejected heat and at least one of (1) powering a component of the HVAC system using the electricity produced by the electricity generating device and (2) heating the refrigerant of the HVAC system using at least a portion of the rejected heat.

Abstract: The present invention relates to a control method of a refrigerator which operates a cooling cycle including two storage compartments, a compressor, a condenser, a valve, fans, and evaporators for cooling the respective storage compartments, with one of the fans (5) corresponding to the storage compartment for storing items at relatively low temperatures being activated for a set amount of time even after the compressor is deactivated at the completion of cooling of the storage compartment for storing items at relatively low temperatures.

Abstract: A dedicated heat recovery chiller/heater having a two step heat transfer arrangement is set out. A refrigerant to refrigerant heat transfer steep allows for higher temperature lift as compared to prior dedicated heat recovery systems.

Abstract: The present invention relates to a household appliance and a method for using a heat pump in a household appliance, and more particularly to a household appliance for washing and drying goods. The household appliance comprises a processing chamber (5) for receiving goods to be washed and dried, and a heat pump (9) having a warm side provided with a condenser (11) and a cold side provided with an evaporator (13), wherein the condenser is adapted to heat water to be used in the processing chamber and the evaporator is adapted to cool a liquid in a heat reservoir (15) for storing heat generated on the cold side of the heat pump during heating of the condenser. The condenser is arranged in a water tank (7) adapted to provide water to the processing chamber.

Abstract: The present disclosure relates to a user-installable room cooling system. This system is both energy and cost efficient and utilizes distributed heat exchangers to a liquid loop. An exemplary embodiment may be comprised of a heat to air transfer plate, a heat pump, a block of heat conductive material, a pump, a pipe interface, a temperature control system, an outside radiator or evaporation cooler, and will be filled at the highest point.

Abstract: This invention includes embodiments which disclose a system for the disposal and or combustion of waste oil for use in a chiller operatively connected to one or more evaporators, the system providing for the collection, storage and/or treatment and dispensation of potable or drinkable water.

Abstract: Heating and cooling system that uses basement air as a thermal supply for efficient operation of a single-package heat pump, providing means to: (a) channel heat pump exhaust as to promote thermal transfer between said exhaust and the basement slab, using the slab as a geothermal source for sustained heat pump operation, and, (b) enable reconfiguration between heating and air-conditioning modes by modification of air ducting or air routing, with no alteration of the refrigerant cycle internal to the heat pump. The system also provides means allowing the heat pump function to be provided by a low-cost, mass-produced, window air conditioner. The window air conditioner technology leveraged by this invention has, in recent decades, become more efficient and reliable, with more convenient controls, but otherwise, has not substantially changed in form, function, or basic operating technology.

Abstract: An energy exchanger is provided. The exchanger includes a housing having a front and a back. A plurality of panels forming desiccant channels extend from the front to the back of the housing. Air channels are formed between adjacent panels. The air channels are configured to direct an air stream in a direction from the front of the housing to the back of the housing. A desiccant inlet is provided in flow communication with the desiccant channels. A desiccant outlet is provided in flow communication with the desiccant channels. The desiccant channels are configured to channel desiccant from the desiccant inlet to the desiccant outlet in at least one of a counter-flow or cross-flow direction with respect to the direction of the air stream.

Abstract: Provided is a lignocellulosic biomass saccharification pre-treatment device capable of producing a pretreated material for saccharification. The lignocellulosic biomass saccharification pre-treatment device comprises a separation unit 4 which separates ammonia gas by heating a pretreated material for saccharification obtained from a substrate mixture obtained by mixing lignocellulosic biomass and ammonia water; a first heat recovery unit 25 which recovers heat-of-dissolution generated when ammonia gas is dissolved in water, and the heat supply units 8, 9, 10 which generate heat by using heat-of-dissolution recovered by the frst heat recovery unit 25 and supply the heat to the separation unit 4.

Abstract: A vehicle air handling system includes an air handler, a desiccant assembly and a regeneration mechanism. The air handler has an air inlet configured to receive airflow into the air handler and an air outlet configured to direct the airflow from the air handler to a passenger compartment of a vehicle. The desiccant assembly is installed in a fixed non-movable orientation within the air handler. The desiccant assembly is configured to absorb moisture from the airflow and is disposed between the air inlet and the air outlet. The desiccant assembly includes a first flow path and a second flow path separated from one another such that the airflow passes through the first flow path. The regeneration mechanism is in fluid communication with the second air flow path of the desiccant assembly and is configured to remove moisture from the airflow passing through the desiccant assembly.

Abstract: A complex power generation system according to an embodiment of the present invention may include a fuel cell module having a first heat exchanger and a second heat exchanger configured to generate a direct current by means of an electrochemical reaction between hydrogen and oxygen, a first cycle configured to receive hot water in a first temperature range from the first heat exchanger to supply to a heat pump, and receive hot water in a second temperature range from the heat pump to supply to the first heat exchanger, and a second cycle configured to receive hot water in a third temperature range from the heat pump to discharge hot water in a fourth temperature range through the second heat exchanger, thereby enhancing a heating performance and increasing a thermal efficiency of the overall system.

Abstract: An air conditioner and a method of operating an air conditioner are provided. The air conditioner may include a heat pump having a water-refrigerant heat exchanger that condenses or evaporates a refrigerant by heat exchange with heat source water; a heat source water flow path connected to the water-refrigerant heat exchanger; a pump installed on the heat source water flow path; a variable flow valve installed on the heat source water flow path; and a variable flow valve controller that controls an opening degree of the variable flow valve. The variable flow valve controller may include a heat source water minimum flow manipulator that manipulates a minimum flow rate of the heat source water and regulates the opening degree of the variable flow valve according to the manipulation of the heat source water minimum flow manipulator. Accordingly, a user or installation personnel may selectively regulate power consumption and efficiency as desired.

Abstract: An appliance includes a cabinet; a first compartment; and a second compartment. The first compartment and the second compartment are separated by a vertical mullion. The cabinet also typically includes a coolant system that has: a single compressor for regulating a temperature of the first compartment and a temperature of the second compartment operably connected to at least one evaporator; a shared coolant fluid connection system; and a coolant fluid spaced within the shared coolant fluid connection system used to regulate both the temperature of the first compartment and the second compartment. The compressor can provide the shared coolant at at least two different pressures to at least one evaporator using the shared coolant fluid connection circuit. The ratio of the substantially steady state heat gain for the first compartment to the substantially steady state total heat gain for the overall cabinet is about 0.65:1 or greater.

Abstract: An appliance includes a cabinet; a first compartment; and a second compartment. The first compartment and the second compartment are separated by a horizontal mullion. The cabinet also typically includes a coolant system that has: a single compressor for regulating a temperature of the first compartment and a temperature of the second compartment operably connected to at least one evaporator; a shared coolant fluid connection system; and a coolant fluid spaced within the shared coolant fluid connection system used to regulate both the temperature of the first compartment and the second compartment. The compressor can provide the shared coolant at at least two different pressures to at least one evaporator using the shared coolant fluid connection circuit. The ratio of the substantially steady state heat gain for the first compartment to the substantially steady state total heat gain for the overall cabinet is about 0.65:1 or greater.

Abstract: An air conditioner and a method of operating an air conditioner are provided. The air conditioner may include at least one indoor device having an indoor heat exchanger that evaporates or condenses a refrigerant by heat exchange with indoor air; at least one outdoor device having a variable capacity compression device that sucks in and compresses a refrigerant of a refrigerant intake passage and discharges the refrigerant to a refrigerant discharge passage, a water-refrigerant heat exchanger that condenses or evaporates a refrigerant by heat exchange with heat source water, and an outdoor expansion device installed between the indoor heat exchanger of the at least one indoor device and the water-refrigerant heat exchanger; a heat source water flow path connected to the water-refrigerant heat exchanger; a pump installed on the heat source water flow path; and a variable flow valve installed on the heat source water flow path.

Abstract: A heat pump water heater and systems and methods for its control are disclosed. The systems are configured to heat water within a water storage tank of a heat pump water heater wherein a controller within the system is operatively connected to a plurality of heat sources including at least one electric heating element and a heat pump and sensors in order to selectively energize one of the plurality of heat sources. The controller is configure to process data representative of the temperature of water within the tank near the top of the water storage tank, and rate of water flowing out of the water storage tank, in order to automatically selectively energize the heat sources. The selection of heat sources by the controller is determined by a mode of operation selected by the user and the data processed by the controller in view of the selected mode of operation.

Abstract: An integrated power and refrigeration system is disclosed that includes a first subsystem configured to provide cooling air using a reverse-Brayton cycle using compressed air and a second subsystem configured to provide power by accepting a first portion of the compressed air from the first subsystem, heating the accepted first portion of the compressed air to form hot compressed air, and using the hot compressed air to drive a turbine that is coupled to a power generator.

Abstract: A modified heat pump (12) comprises a closed circuit around which a refrigerant fluid is circulated, a plenum chamber (13) and an auxiliary heat exchanger (16). The closed circuit has a compressor, a condenser, an expansion valve and an evaporator. The evaporator is located within the plenum chamber (13). The plenum chamber (13) also has an inlet (14) adapted to receive a fluid heat source medium and direct it over the evaporator, thereby to extract heat from said medium, and an outlet (15) adapted to receive cooled medium expelled from the plenum chamber (13). The auxiliary heat exchanger (16) is located between the inlet (14) and the evaporator, and is adapted to warm said medium prior to it passing over the evaporator.