Abstract: In a LED lamp structure and an illuminating module thereof, the illuminating module includes a circuit board, a flat plate LED, an electrical pin and a packaging colloid. The circuit board has a length, a first and a second side formed at two sides of the length. The flat plate LED is fixed and electrically connected with the circuit board, bulges at the first side, and includes a substrate and at least one LED grain assembled on the substrate. The flat plate LED can emit omnidirectional light because the substrate is made of transparent material. The electrical pin is fixed and electrically connected with the circuit board and bulges at the second side. The packaging colloid covers the circuit board and the flat plate LED and has a rectangular plastic block. Thereby, the LED lamp structure can remain traditional appearance of a halogen lamp, for collecting and focusing light.

Abstract: A system according to an embodiment of the invention may include a track and a power supply substantially contained within the track. One or more lamps may be electrically connected to the power supply. The lamp may be an HID lamp, an LED lamp, or a fluorescent lamp. The power supply may be a ballast or a transformer, and may comprise a printed circuit board with electrical power handling components on one side. The system may also include a housing which may surround the power supply.

Abstract: An illustrative remodel light assembly for installation from a front side surface of a ceiling or wall panel, such as drywall, includes a collar inserted though and secured to a panel cutout with bendable fingers, a light housing, a light trim including a trim flange, the flange for abutting a front side surface of the panel, and a plurality of self-actuating spring clips coupled to an outer periphery of one of the light housing and light trim, the self-actuating spring clips engaging the collar. The collar provides a secure structure that lines the cutout and upon which the trim flange and self-actuating spring clips secure the light assembly.

Abstract: An artificial tree having a first tree section including a trunk and a trunk electrical connector, the trunk electrical connector including a first pair of electric terminals and a second pair of electrical terminals; and a second tree section including a trunk, a trunk electrical connector, and a light string, the trunk electrical connector in electrical connection with the light string and including a first pair of electric terminals and a second pair of electrical terminals. The first tree section is configured to electrically connect to the second tree section, such that the first pairs of electrical terminals of the first and second tree sections conduct power of a first type and the second pairs of electrical connectors of the first and second tree sections conduct power of a second type.

Abstract: A conformal power adapter for insertion into a lighted artificial tree and for converting power received from an external power source to a power usable by the lighted artificial tree. The power adapter includes an elongated housing including a first end, and a second end; a printed circuit board assembly including power-converting circuitry for converting an input electrical power to an output electrical power for use by a lighted artificial tree having a hollow trunk section, the printed circuit board assembly located substantially within the elongated housing; a power cord secured to the first end of the housing and in electrical connection with the power converting electronics, the power cord adapted to transmit power from an external power source to the power-converting circuitry. The elongated housing enclosing the printed circuit board assembly is sized to fit substantially within the hollow trunk portion of the lighted artificial tree.

Abstract: Disclosed is an electrical lamp for holding and displaying a collector's round (or oval) item. The lamp comprises a base assembly comprising a base and a bottom plate secured to a top surface of the base, a top assembly comprising a top plate, a lamp assembly comprising an electrical light bulb connected to the top plate, and a lamp shade encircling the light bulb, and a connecting means for connecting the top and base assemblies such that, the top and bottom plates are vertically aligned. The round item is adapted to be snugly and removably received between the top and bottom plates.

Abstract: A multi-functional heat sink includes a top portion and a skirt portion extending down from the top portion. When a light source is attached to the top portion on an underside of the multi-functional heat sink, the skirt portion reduces risk of rain water from reaching the light source and prevents light emitted by the light source from exiting the multi-functional heat sink in an upward direction. The multi-functional heat sink is made from sheet metal.

Abstract: A light emitting diode (LED) lighting system including a first heat dissipation structure having a front side acting as a contact area to at least one LED and a back side. At least one second heat dissipation structure is positioned adjacent to the backside of the first heat dissipation structure. At least one thermoelectric module is positioned between the first heat dissipation structure. At least one second heat dissipation structure for conducting heat is produced from the at least one LED during operation from the first heat dissipation structure towards the at least one second heat dissipation structure. The front side of the first heat dissipation structure comprises at least one upwardly protruding structure extending distally away from the at least one second heat dissipation structure and the at least one upwardly protruding structure acts as the contact point to the at least one LED.

Abstract: In various embodiments, a lighting device may include at least one heat sink and a base configured to accommodate at least one light source and at least one device connected to the lighting device configured to generate a cooling media flow, wherein the cooling media flow runs predominantly parallel to the plane of the base of the heat sink.

Abstract: A power source housing for use with a high mast lighting apparatus, the housing having a front face and an opposing, back face. The front face closest to a back face of a light emitting diode (LED) housing. The housing further includes at least two opposing side faces extending from the front face to the back face and power housing cooling fins extending outward from the at least two opposing side faces.

Abstract: Example methods and systems for controlling three-dimensional lighting arrangements are described. One example method includes a method is provided that involves (1) receiving by a computing system location data indicating a respective location of each of a plurality of light sources within a volume, (2) receiving by the computing system an indication to provide a geometric lighting arrangement, where the geometric lighting arrangement comprises a plurality of points having a pre-determined spatial relationship, (3) determining by the computing system a respective location, within the volume, of each point in the geometric lighting arrangement, where at least one of the light sources corresponds to each point, and (4) for each light source that corresponds to one of the points, controlling by the computing system the light source such that a light beam from the light source illuminates the location of the corresponding point within the volume.

Abstract: A door having a front face with a transparent portion and a decorative insert set behind. The decorative insert presents a thematic scene as desired by the user that may be easily changed. The door further enhances the display of the decorative insert by providing selectively controlled illumination and an accompanying audio presentation related to the insert's theme.

Abstract: An automatic water-adding vaporization including a pot body main body, a heat-generating component installed on the pot body main body, a water pump connected to the pot body main body, a control circuit for controlling the water pump, a temperature acquisition board and a water-depletion-and temperature-sensing element installed on the temperature acquisition board. One end of the temperature acquisition board is either connected to the heat-generating component or to a position of the pot body main body in proximity to the heat-generating component. The remaining parts of the temperature acquisition board are away from the pot body main body. The water-depletion- and temperature-sensing element is installed at a position on the temperature acquisition board away from the pot body main body. The water-depletion- and temperature-sensing element is connected to the control circuit.

Abstract: A gaseous fuel-oxygen burner is described herein. One device includes a flame zone in which combustion of gaseous fuel and oxygen occurs to form a flame, a coaxial gaseous fuel jet configured to provide the flame zone with gaseous fuel, and a coaxial oxygen jet configured to provide the flame zone with oxygen, wherein the coaxial gaseous fuel jet and the coaxial oxygen jet are separate such that the gaseous fuel from the coaxial gaseous fuel jet and the oxygen from the coaxial oxygen jet do not mix before entering the flame zone.

Abstract: An air/gas premix burner is disclosed. The air/gas premix burner includes a fan for sending an air/gas mixture towards a combustion head and a gas valve for regulating the introduction of combustible gas. The air/gas premix burner also includes an air/gas mixer, which comprises a localized pressure loss device, and a combustion head. The air/gas mixer includes two channels. One of the channels is provided with two hinged flaps that are designed to open and close for regulating the flow rate of the mixture.

Abstract: A furnace-heating combustion apparatus that allows adjustment of a ratio between the amount of primary air and the amount of secondary air. A double-tube elongate burner extends through a rear wall portion of an air box disposed away from a furnace wall. The leading end portion of the burner is disposed inside a tube section such that a secondary air conduit is formed between an outer circumferential face of the leading end portion and an inner circumferential face of the tube section. A primary air conduit is provided at the leading end portion of the burner to introduce the air inside the air box from the rear end portion and cause it to flow toward the leading end portion. A burner supporting means is provided for to allow adjustment of the position of the burner in the longitudinal direction relative to the rear wall of the air box.

Abstract: A mixer device for burner equipment includes flow guide means for guiding an air-gas mixture to the intake of a fan rotatable about a first axis, the guide means including a tubular Venturi effect conduit structure with axially symmetric contiguous converging and diverging portions about a second axis, a section being provided between the portions of conduit into which the gas flow is delivered for mixing with the air flow supplied through the converging portion. The fan's axis of rotation does not coincide with the axis of longitudinal development of the Venturi effect conduit, the offset between the first and second axes allows placement of a valve which supplies the gas flow into the Venturi effect conduit with a configuration in which the projection of the overall dimensions of the Venturi effect conduit and of the valve unit, in the rotational axis direction, lies within the fan's cover plate projection.

Abstract: Methods and apparatus relate to control of smoke suppressant flow rate to a flare that disposes of combustible gas, such as waste from refineries and chemical plants. One or more detectors produce signals that enable separate monitoring of both particulate emissions from the flare and combustion efficiency of the flare. Adjusting the flow rate of the smoke suppressant to the flare in response to such dual monitoring facilitates operation of the flare so as to manage environmental pollution caused by unburned volatile organic compounds and smoke emitted from the flare.

Abstract: Oxycombustion process wherein low ranking, gaseous, liquid, solid, optionally solid melting hydrocarbon fractions are used as fuels, having a vanadium content in an amount by weight from 50 to 5,000 ppm or higher, for producing energy, wherein magnesium is added as oxide, or as a water-soluble salt, the combustor being refractored and isotherm or quasi isotherm, flameless, working at temperatures comprised between 1,250° C. and 1,450° C. and under pressurized conditions, wherein the oxidant is oxygen, the oxidant being used in admixture with water or steam such that the ratio by moles oxidant:(water-steam) is comprised between about 1:0.4 and about 1:3 or the oxidant is used in admixture with flue gases recycled from the flue gases outletting the energy recovery equipments, wherein the water amount is higher than 30% by volume, optionally by adding water, the molar ratio oxidant:(water/steam) in flue gases being comprised from about 1:0.

Abstract: The method for adjusting a natural gas temperature for a fuel supply line of a gas turbine engine includes measuring by infrared analysis the natural gas percentage content of methane (CH4), ethane (C2H6), propane (C3H8), butane (C4H10), carbon dioxide (CO2), calculating the nitrogen (N2) percentage content as the complement to 100 of the measured percentage content of methane (CH4), ethane (C2H6), propane (C3H8), butane (C4H10), carbon dioxide (CO2), calculating an index indicative of the natural gas energy content and adjusting the natural gas temperature on the basis of the index.

Abstract: A blower device for delivering at least one medium includes a blower having a housing with an inlet and an outlet, a nozzle, which is fluidically connected and arranged on the housing such that at least one medium can flow there through. The nozzle is designed to effect a negative pressure on the at least one medium at least in some sections. At least one sensor is arranged in the effective region of the nozzle and designed to measure at least parameters of the at least one medium which are required to determine the mass of the at least one medium.

Abstract: A fuel nozzle for use in a turbine engine is provided. The fuel nozzle includes a fuel injector configured to discharge a flow of fuel therefrom and a premixer tube coupled in flow communication with the fuel injector. The premixer tube is configured to receive the fuel flow and a flow of air at an upstream end of the premixer tube, wherein the fuel and air are progressively mixed as the fuel and air are channeled through the length of the premixer tube.

Abstract: A combustion turbine engine combustor section includes a plurality of annularly arrayed combustors housed within paired combustor portals of a combustor casing. Each combustor portal has a corresponding top hat cover having a peripheral flange. The paired combustor portals are formed in combustor housings having a figure eight-shaped sleeve wall planform. The paired adjoining combustor portals share a common Siamesed portion of the sleeve wall. A combustor portal mating surface is formed on an axial distal end of the sleeve wall, having a figure eight planform and defining a first array of fastener receiving apertures. A top hat cover retention bracket assembly having a composite planform conforming to the combustor portal mating surface planform and a second array of apertures that conform to the first array pattern apertures, is placed over the peripheral flanges of the paired combustor top hat covers and secured by top hat cover fasteners.

Abstract: A multi-ring gas burner includes an outer burner ring that extends around an inner burner. The outer burner ring has a cross-lighting duct with a fuel delivery aperture positioned at a bottom portion of the cross-lighting duct. The fuel delivery aperture is configured for directing gaseous fuel from a fuel chamber of the outer burner ring into the cross-lighting duct.

Abstract: Disclosed is a cooking device having a flexible sequence control for automatic cleaning of an oven cavity. A customizing aspect allows for the inputting of values for a combination of parameters of a cleaning system. These parameters may include degree of soiling, cleaning time, energy consumption, water consumption, cleaner consumption, rinse agent consumption, and/or overall cost of cleaning. The sets of parameters can be entered, saved and recalled, or deleted. While setting values of the parameters, any undefined parameter(s) are automatically changed accordingly to achieve an optimal result. Unreasonable or impossible combinations of parameters are blocked. The parameters may be visualized as user friendly touch-activated bars. Selection can be made from several optimizing options, such as cost optimization, time optimization, resource optimization, and ecological optimization that reduce the consumption of resources.

Abstract: An oven that effectively cools a door by adjusting a position of a cooling guide includes a casing having at least one inhalation hole and at least one ejection hole; a cooking chamber which has an opening and is placed inside the casing; a door that is rotatably coupled to one portion of the casing so as to open/close the opening; a cooling fan that discharges air introduced into the inhalation hole to the ejection hole placed at a front portion of the casing; and an air guide that is installed adjacent to the ejection hole so as to change a direction of air driven by the cooling fan. The cooling guide is installed not to disturb the flow of air that passes through the door so that the door using minimum sheets of glass can be provided.

Abstract: The present invention provides an oven appliance and for operation of an oven appliance. The oven appliance and a method for operating the oven appliance include features such that the door of the oven appliance remains locked unless a cooking cycle is initiated or a door unlocking element is utilized.

Abstract: An improved control system for a range hood that is capable of automatically responding to various air quality parameters including heat, smoke, carbon monoxide, humidity, and others. The system contains a number of features that, combining aspects of open-loop and closed loop control, manage the system dynamics for smoother operation, respond to both level and rate signals and compensate for background conditions and sensor variability by using relative values.

Abstract: A broil baffle for an oven may be provided. The oven may include a broil burner configured to distribute heat. The baffle may be positioned such that the broil burner distributes heat toward the baffle. The baffle may include a plurality of dimples configured to disperse infrared radiation from the distributed heat in multiple directions away from the baffle toward a broiling surface of the oven.

Abstract: A convection oven is disclosed. The convection oven comprises a housing having an oven cavity and an oven door for access to the oven cavity, at least one air blower for generating heated air, one or more air channels for directing the heated air from the air blower toward the oven cavity, and one or more removable air plenums, wherein each removable air plenum is connected to one of the one or more air channels, comprises an air intake edge for receiving the heated air from the air channel, defines the top or the bottom of a cooking chamber within the oven cavity, and comprises a plurality of air vents for directing the heated air into the cooking chamber. The convection oven may further comprise a control panel for separately and independently controlling each of the cooking chambers defined by the removable air plenums.

Abstract: Provided is a door for a cooking appliance, such as an oven range, with multiple spaced apart glass panels. An interlocking mechanism promotes a proper installation of the glass panels, and interferes with the installation of the glass panels or with operation of the appliance if at least one of the panels is not properly installed. A switch with a plunger can be installed in the door, which allows the appliance to operate only when a failsafe electrical circuit is closed corresponding to a selected position of the plunger when the door is closed. The plunger is prevented from retaining that selected position if at least one of the glass panels is improperly installed or if a top cap is not properly seated or installed above the glass panels.

Abstract: The wireless wall thermostat of the present invention utilizes a push-contact mechanical system that allows a user to raise or lower the temperature within a space by applying a force on the top or bottom center of the front of the thermostat. The perpendicular force applied by the user generates a moment arm around pivot connectors, which rotates the thermostat clockwise or counter-clockwise. When rotated clockwise or counter-clockwise, contact buttons attached to the back of the thermostat come into contact with the trigger tabs of a stationary trigger plate mounted to a wall through use of an electromagnetic attraction between a steel disc and a magnet. When the trigger tabs press the contact buttons, the contact buttons send a signal to the central processing unit of the thermostat's internal circuit board to modulate the temperature setting. In addition, the wireless wall thermostat can be detachable by utilizing a magnetic release smart mount.

Abstract: This invention relates to HVAC systems, zone control units, and control systems. More specifically, an HVAC system employs distributed zone control units that provides localized air recirculation. A zone control unit includes a return air section that receives return air from serviced building zones and mixes the return air with a supply of outside air. The mixed air is heated and/or cooled by the zone control unit and discharged to serviced building zones in a controlled manner. An exhaust air system is used to extract air from serviced building zones. The HVAC zone control unit also includes a local control unit with an Internet protocol address. The local control unit includes a memory and a processor for storing and executing a control program for the zone control unit. The control program controls of the zone control unit in response to commands received via the Internet.

Abstract: A modular heating and cooling unit comprising an independent set of headers for each of the heating and cooling loads and the source. A bank of these modular units provides a system that is capable of incremental simultaneous heating and cooling and redundancy. Valves in the internal piping of the unit eliminate the need for valves in the headers between units. This substantially reduces the overall footprint of the unit. Because of the parallel flow between the heat exchangers and the heating and cooling load, the modules can be operated in cooling mode and heating mode in any order.

Abstract: A modular heating and cooling unit comprising an independent set of headers for each of the heating and cooling loads and the source. A bank of these modular units provides a system that is capable of incremental simultaneous heating and cooling and redundancy. Valves in the internal piping of the unit eliminate the need for valves in the headers between units. This substantially reduces the overall footprint of the unit. Because of the parallel flow between the heat exchangers and the heating and cooling load, the modules can be operated in cooling mode and heating mode in any order.

Abstract: A controller controls the operations of a humidity control apparatus and an air conditioner. The controller includes a power consumption detector, a target value setting processor, and an operation control unit. The power consumption detector detects the power consumption of the humidity control apparatus and the air conditioner. The target value setting processor performs optimal target value setting processing by performing first or second processing. The first processing lowers a target operating frequency of a humidity controlling compressor and a target evaporation temperature in a utilization-side heat exchanger. The second processing raises the target operating frequency and the target evaporation temperature. The optimal target value setting processing sets the target operating frequency and the target evaporation temperature so as to minimize the power consumption.

Abstract: A cooling unit for an agricultural vehicle has a grid for allowing air to enter the unit while limiting debris and a heat exchanger for transferring heat from a coolant to air passing across the heat exchanger. The cooling unit further has a duct with motor driven fan, and a controller to monitor fan current and operate the fan in alternating directions. The controller generates a heat exchanger blockage warning when desirable fan current thresholds are not achieved.

Abstract: A fan system for a variable air volume heating and/or air conditioning unit comprising a fan array with a control system to eliminate surge at low operating flows and to maximize operating range. The fan control system includes a fan pressure sensor for determining the pressure rise across the fan array and a fan airflow sensor for determining the total airflow generated by the fan array. A surge controller is programmed to constantly monitor the calculated surge pressure as the fan speed control is modulating the fan speed in response to user demands. As airflow increases or decreases in response to changes in fan speed, so will the calculated surge pressure. The surge control turn fans on and off to ensure that the operating fans are running in their optimum fan speed ranges. Thus, the fans in the fan array are prevented from reaching the surge point.

Abstract: The present invention is related to a device for controlling an airflow field and a method thereof. The method is included of: supplying a cooling airflow into an air conditioning space, smoothly altering flux of the cooling airflow, retrieving a backflow temperature of the cooling airflow, and comparing variation of the backflow temperature with a flux variation of the cooling airflow. Only part of the air conditioning space is covered in the circulation range of the cooling airflow if the backflow temperature is varying in the same tendency as the flux variation. The device is included of an air conditioning cabinet and a chiller. The air conditioning cabinet is included of a coil pipe, a fan corresponding to the coil pipe and a processing module electrically connected to the fan. The chiller is connected to the coil pipe to supply cooling water in to the coil pipe.

Abstract: A heat pump operation method includes: obtaining, on a per time unit basis, generated power, load power, surplus power, and an impact magnitude; and controlling operation of the heat pump to cause the heat pump to consume an amount of power for generating heat adjusted to follow the surplus power obtained on a per unit time basis. In the controlling, when the impact magnitude is greater than a predetermined first threshold value, the operation of the heat pump is controlled to permit consumption of the power supplied from an energy supplier and approximate a reverse flow of the surplus power to zero, and when the impact magnitude is less than or equal to a predetermined second threshold value, the operation of the heat pump is controlled to permit the reverse flow of the surplus power and approximate the consumption of power supplied from the energy supplier to zero.

Abstract: A fuel-fired condensing type air heating furnace is provided with an electronic condensate water level sensing system operative to sense improper outflow of condensate from a collector box portion of the furnace and responsively shut down or prevent operation of the furnace. Condensate probe portions of the system are oriented in a manner such that several air flow orientation of the furnace may be utilized without the necessity of relocating the probes or effecting an re-wiring of the water level sensing system.

Abstract: The invention relates to a field of open-flow solar collectors, and specifically to flat solar collectors with wetting the underneath sides of their solar radiation absorbing plates with liquid heat transfer medium. More specifically, the invention proposes the flat solar collector, which operates with relatively low flow rate of the heat transfer medium on the underneath side of the solar radiation absorbing plate, with flow in form of some rivulets. The invention describes some technical solutions, which restrict meandering rivulets' flow. The proposed flat solar collector can be applied for heating water or other liquids and for evaporation and concentration of aqueous solutions.

Abstract: Liquid-based adjusting device (100) for a solar system comprising at least one holding element (1) for attaching at least one solar element, a swivel device (2), designed and intended for swiveling the holding element (1) around at least one swivel axis (S) and/or along a guiding curve (F) of the holding element (1), wherein one floating body (1A) of the holding element (1) is at least partially arranged below a filling level (30A) of the liquid tank (3A) and only by the buoyancy thereof the holding element (1) is swivel-mounted relative to one longitudinal axis (L) of the liquid tank (3A) around the swivel axis (S) and/or along the guiding curve (F) and mounted above the filling level (30A) directly on the rim (31A) of the liquid tank (3A), wherein the filling level (30A) of the liquid tank (3A) can be varied by means of a piping system (4) of the swivel device (1).

Abstract: A refrigerant system capable of operating at multiple capacity modes includes an evaporator, a multi-stage compressor assembly, a first fluid flow path, a second fluid flow path, a first valve, and a second valve. The multi-stage compressor assembly has a first stage and a second stage. The first fluid flow path extends from the evaporator to the first stage of the multi-stage compressor assembly. The second fluid flow path connects to the first fluid flow path and to the multi-stage compressor assembly between the first stage and the second stage.

Abstract: A refrigerator having a refrigerating circuit with a compressor, a condenser and two evaporators placed in different compartments of the appliance comprises valve means for alternatively directing refrigerant flow towards one of the evaporators. One of the evaporators is in heat exchange relationship with a phase change material.

Abstract: A multi-room air-conditioning apparatus includes an outdoor unit, a relay unit connected to an outdoor unit by first and second connection pipes, and a plurality of indoor units connected to the relay unit. The outdoor unit includes a second gas-liquid separating device provided on the suction side of the compressor. The suction side of the compressor and the second gas-liquid separating device are connected to each other by a gas-side outlet pipe and a liquid-side outlet pipe.

Abstract: The invention relates to an absorption refrigeration machine (10) that includes an evaporator (12) and an absorber (18) and is characterized in that the evaporator (12) comprises at least one evaporating unit (12?) having a coolant channel (26), through which the coolant (16) flows and which is delimited at least in part by a heat-conducting, vapor- and liquid-tight wall (24), and having at least one refrigerant channel (28) that adjoins the heat-conducting wall (24), is loaded with the refrigerant (14), and is separated from a vapor chamber (32) by a vapor-permeable, liquid-tight membrane wall (30) on the side of the refrigerant channel opposite the heat-conducting wall (24), and in that the absorber (18) comprises an absorption unit (18?) having a cooling-medium channel, through which a cooling medium (34) flows and which is delimited at least in part by a heat-conducting, vapor- and liquid-tight wall (36), and having an absorption channel (40) which adjoins the heat-conducting wall and to which the concent

Abstract: An active magnetic regenerative (AMR) refrigerator apparatus can include at least one AMR bed with a first end and a second end and a first heat exchanger (HEX) with a first end and a second end. The AMR refrigerator can also include a first pipe that fluidly connects the first end of the first HEX to the first end of the AMR bed and a second pipe that fluidly connects the second end of the first HEX to the first end of the AMR bed. The first pipe can divide into two or more sub-passages at the AMR bed. The second pipe can divide into two or more sub-passages at the AMR bed. The sub-passages of the first pipe and the second pipe can interleave at the AMR bed.

Abstract: A cooling structure includes a first plate, a second plate separated from the first plate, and an inlet adapted to receive a cooling fluid. The cooling structure also includes a first cooling portion coupled to the first plate and adapted to maintain a first temperature. The cooling structure further includes a second cooling portion coupled to the second plate and adapted to maintain a second temperature different from the first temperature.

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