Abstract: An embodiment of the present invention relates to a lighting device comprising: a light source unit comprising a plurality of light emitting elements; a conversion unit for converting light emitted from the light source unit; a reflection unit for reflecting light which has passed through the conversion unit; and a half mirror member, which is disposed on the top of the reflection unit, for transmitting a portion of incident light and reflecting a portion of the incident light. The conversion unit includes an optical pattern for selectively transmitting light emitted from the light source unit, the light source unit is disposed on a periphery portion of the reflection unit, and the height of the center portion of the reflection unit is greater than the height of the periphery portion thereof.

Abstract: A pumped fluorescent light source includes a parabolic mirror that is positioned to focus pumping light from one or more pump sources on a fluorescent body. The resulting assembly provides for heat collection from a back surface of the light source for both the fluorescent body and the pumping sources in a compact package that may be hermetically sealed. The parabolic mirror has reflective surfaces disposed outside of a collection area of an output beam of the light sources, so that the collection area is not obstructed by the parabolic mirror. The light source also includes a collecting lens for collecting the light emitted by the body. The parabolic mirror focuses the stimulus light on the fluorescent body to stimulate emission. An additional parabolic mirror may be included behind the fluorescent body to focus the fluorescent emissions that do not directly enter the collection area at a point of collection.

Abstract: A luminaire (61) is disclosed with a close coupled ballast (62) having a support arm (66) from which is suspended or hung a reflector, and preferably a variable focus reflector (41), having either a single ended lamp (3) or double ended lamp (23). The luminaire (61) is supported from a greenhouse rafter (9) by filaments (10, 11) which are connected one to the ballast (62) and the other to the free end of the support arm (66). In one embodiment the arm (66) is connected to a rigid side plate (64) which is mounted on the ballast (62). In another embodiment the arm (66) is connected to a side plate (164) which is hinged. The arrangement enables flimsy reflectors (41) to be close coupled with electronic ballasts in a way which minimises Radio Frequency Interference (RFI).

Abstract: A tunable spectral filter includes a first tunable dispersive element, a first optical element, a spatial filtering element located at the focal plane, a second optical element, and a second dispersive element. The first tunable dispersive element introduces spectral dispersion to an illumination beam with an adjustable dispersion. The first optical element focuses the illumination beam at a focal plane in which a distribution of a spectrum of the spectrally-dispersed illumination beam at the focal plane is controllable by adjusting the dispersion of the first tunable dispersive element. The spatial filtering element filters the spectrum of the illumination beam based on the distribution of the spectrum of the illumination beam at the focal plane. The second optical element collects the spectrally-dispersed illumination beam transmitted from the spatial filtering element. The second tunable dispersive element removes the dispersion introduced by the first tunable dispersive element from the illumination beam.

Abstract: An optical element for influencing light emitted by a plurality of LEDs, which has a light entrance region for entrance of the light, and a light exit region situated opposite the light entrance region and serving for exit of the light. An arrangement for light emission comprising such an optical element and the LEDs are also disclosed. An axis (A) running both through the light entrance region and through the light exit region is defined by the shape of the optical element; the light exit region is subdivided by a ring-shaped indentation into a central middle region and an edge region arranged around the middle region. The light entrance region and the light exit region are shaped in such a way that, as viewed in a direction along the axis (A), they have an n-fold rotational symmetry, wherein n is a natural number greater than 2.

Abstract: A light module for a light fixture includes a light assembly, a bezel extending at least partially around the light assembly and secured to the light assembly, and a pinion. The bezel and the light assembly are at least partially pivotable about a first axis. The bezel includes an outer surface and a first gear surface extending along at least a portion of the outer surface. The pinion includes a second gear surface engaging the first gear surface, and rotation of the pinion causes the bezel and the light assembly to rotate about the first axis.

Abstract: A lighting system can include a light fixture having a body and at least one light source, where the light fixture is coupled to a structure. The lighting system can also include a cover having at least one first fixture coupling feature, where the at least one first fixture coupling feature detachably couples to the body of the light fixture, and where the cover physically covers at least a first portion of the body of the light fixture.

Abstract: A high bay luminaire includes a heat sink having a substantially disc-shaped configuration. A light emitter is connected to the heat sink. A reflector is connected to the heat sink. A yoke is connected to the heat sink. The yoke has a first arm, a second arm, and a top bar. A driver is connected to the yoke so that the driver extends between the first arm and the second arm.

Abstract: In various embodiments, a lighting device is provided. The lighting device may include at least one first part and at least one second part, fastened to the first part, which first and second parts are interconnected by a potting compound, the parts being positively interconnected by the potting compound.

Abstract: A light source module includes a plurality of light sources mounted in at least one block. The block includes a mating surface for mating the at least one block to an adjacent block, and a plurality of mounting pads for respectively mounting the plurality of light sources, said mounting pads occupying multiple planes in a direction normal to a direction of light emission from the light sources. The mating surface is parallel to the direction of light emission from the light sources. Multiple blocks may be combined by joining the mating surface of a first block with a protrusion extending beyond the mating surface of an adjacent block. When the blocks are combined in this fashion, the mounting pads positioned in the multiple planes overlap in a viewpoint direction along an axis normal to the mounting pads. In this manner, light sources do not impede light emission from adjacent light sources.

Abstract: Methods and apparatus for illuminating decorations according to various aspects of the present invention may comprise a light source and a diffuser. A connector may connect the light source to the decoration. A reflector may reflect light from the light source towards an anticipated observer.

Abstract: A lamp structure contains a lamp head and a magnetic seat. The lamp head includes a lampshade, a light transmission cover, and a light emitting element. The magnetic seat includes a holding member, at least one magnet, a first electrode plate, and a second electrode plate. The lampshade includes a first light exit, a second light exit, and a reflective face, wherein a gap is defined between the light transmission cover and the reflective face. The first electrode plate and the second electrode plate are electrically connected with the light emitting element via a wire, and the first and second electrode plates are made of metal material consisting of iron. The magnet magnetically attracts and produces magnetic force on the first and second electrode plates which magnetically attract on a conductive component consisting of iron by using the magnetic force so as to form a power circuit.

Abstract: The present application relates to a handle device for a surgical light. The handle device may include a grip element which is prepared for being arranged on a lamp holding body of the surgical light and which forms a grip surface at an outer area. A sensor module is detachably connected to the grip element, with the sensor module including at least one distance sensor which is designed for detecting a position of an object. The present application further includes a surgical light including such a handle device.

Abstract: The light fixture includes a frame, a substantially flat light emitting diode (LED) panel disposed within the frame, power circuitry disposed within at least one of a number of channels within the frame, and a central wire-way. The frame includes a bottom assembly and a top assembly coupled to the bottom assembly. The bottom assembly and the top assembly cooperate to form the channels within the frame. The bottom assembly has a back surface. The power circuitry is configured to electrically couple the substantially flat LED panel to an external AC power supply. The central wire-way is disposed adjacent the back surface of the bottom assembly and configured to route wiring to or from the power circuitry disposed within at least one of the channels within the frame.

Abstract: A controlled-environment plant growing systems are described. The system may include a plant growing enclosure, a liquid-cooled LED unit, an air cooler unit, an air heater unit, a heat exhaust unit, a recirculation pump, a chiller, and a controller. The enclosure may have mirror-like inner surfaces. The LED unit may include one or more LED modules and a transparent, liquid-tight housing encasing the LED modules. The housing may have a liquid inlet and a liquid outlet configured to flow a liquid coolant through the housing, thereby cooling the LED modules. The air cooler unit may be configured to cool the enclosure via the liquid coolant. The air heater unit may be configured to heat the enclosure via heat produce by the LED modules. The heat exhaust unit may be configured to exhaust excess heat remote of the enclosure. The controller may be configured to control one or more of the air cooler unit, the air heater unit, and/or the chiller in order to control the temperature within the enclosure.

Abstract: Described is dynamic control of the temperature of the envelope of an HID lamp in order to stabilize the output color temperature of the lamp. As the lamp power is changed, or environmental factors alter the lamp envelope temperature, the system senses these changes and adjusts the lamp cooling systems so as to move the lamp envelope temperature back to the desired point.

Abstract: The present application relates to apparatus for generating steam. The apparatus comprises an evaporation surface (24), a heater (26) disposed adjacent to the evaporation surface to heat the evaporation surface, a water inlet (19) positioned relative to the evaporation surface so that water is fed onto the evaporation surface from the water inlet and forms a film on the evaporation surface such that the film is evaporated from the evaporation surface, and a scale collection region (23) positioned such that, during use of the apparatus, scale dislodged from the evaporation surface falls away from the evaporation surface into the scale collection region.

Abstract: A combustion module including a body including a combustion chamber, and at least one connector for supplying the combustion chamber with at least one combustible intended to be burned in the combustion chamber, is provided. The supply connector includes at least one inlet orifice intended to be connected to at least one source of combustible through a conduit and at least one outlet orifice intended to be connected to the at least one combustion chamber. The supply connector has a thermal conductivity substantially lower than that of the body such that the supply connector assures that the temperature at the inlet orifice of the supply connector and the conduit is lower than the auto-ignition temperature of the combustible(s).

Abstract: A combustion system includes an ionizer configured to eject charges (or accept charges) for uptake by a combustion reaction to cause a combustion reaction to carry a majority charge or voltage. The ionizer includes an inner electrode, a dielectric body surrounding the inner electrode, and one or more conductive or semi-conductive inner electrodes disposed on the surface of the dielectric body. The inner and outer electrodes are configured to be in a capacitive relationship.

Abstract: The present invention is a burner flame detector to detect a flame at a farthest end of a burner using a flame rectification rod. It comprises of a rod-element comprising of an inner electric-wire, an electrically insulating material surrounding the inner electric-wire, a metallic tubular outer rod protecting the insulating material and the inner electric-wire. The metallic tubular outer rod is electrically insulated from the inner electric-wire, and a flame rectification sensor is attached to the rod-element at the farthest end of the burner, which goes through the flame. The flame rectification sensor becomes exposed to a flame and sends a flame rectified signal to a controller, through the inner electric-wire.

Abstract: One object of the present invention is to provide an oxygen burner which is capable of forming a high-velocity-oxygen jet flow without a cooling structure, and efficiently dissolving an object to be heated, and the present invention provides an oxygen burner comprising a primary oxygen ejection port provided at a tip of the primary oxygen flow path, a plurality of fuel gas supply pipes provided so as to branch a tip end side of the fuel gas flow path, a fuel gas ejection port provided in each of the fuel gas supply pipes, and a secondary oxygen ejection port provided at a tip of the secondary oxygen flow path, the fuel gas ejecting ports are arranged so as to surround the primary oxygen ejection port, the secondary oxygen ejection port is arranged so as to surround the fuel gas ejection ports and the primary oxygen ejection port, and the fuel gas ejection ports are arranged on the same plane and protrude than a tip of the primary oxygen ejection port.

Abstract: A wall-fired burner includes a fuel tip defining a fuel direction axis and a fuel tip pivot axis perpendicular thereto. A first air tip is adjacent to the fuel tip. The first air tip defines a first air direction axis and a first air tip pivot axis perpendicular thereto. A second air tip is adjacent to the fuel tip, opposite from the first air tip across the fuel tip. The second air tip defines a second air direction axis and a second air tip pivot axis perpendicular thereto. A mechanism operatively connects the fuel tip, the first air tip and the second air tip for at least one of independent and/or joint movement of the fuel tip, the first air tip and the second air tip.

Abstract: A combustion apparatus having: an upstream-side air supply chamber and a downstream-side mixing passage, both being respectively interposed between a fan and a burner; and a zero governor which is interposed in a gas supply passage and which adjusts a secondary gas pressure to a pressure equivalent to an internal pressure in the air supply chamber, thereby enabling to maximize a turndown ratio to the extent possible. The combustion apparatus has: first and second, totally two, mixing passages; a first gas outlet which is in communication with a narrowed part of the first mixing passage; a second gas outlet which is in communication with a narrowed part of the second mixing passage; a first air valve which varies an opening degree of an air inlet of the first mixing passage; a second air valve which varies an opening degree of an air inlet of the second mixing passage; and a gas valve.

Abstract: The invention relates to a method of capturing a sintered product after sintering a waste gas in a semiconductor manufacturing process and its capturing device. The method comprises providing aerosolized water molecules to be entered into a reaction chamber of a waste gas treatment tank; and capturing a product generated after a sintering reaction of the waste gas by diffusion distributing of the aerosolized water molecules, wherein, the aerosolized water molecules are diffusion distributed between a bottom edge of a waste gas reaction end in the reaction chamber and a tank wall surrounding the reaction chamber. The present invention further provides a device for capturing a sintered product for implementing the method.

Abstract: The present invention relates to a heat exchanger for the supply of oxygen or of a gas mixture containing at least 50% oxygen, the temperature at the outlet of the exchanger not being below 300° C., it preferably being above 400° C., the oxygen or the oxygen-rich gas feeding one or more burners of a glass melting furnace, the heat of the combustion gases being used directly or indirectly to heat the oxygen or the oxygen-rich gas in the exchanger, in which the exchange power is between 20 and 300 kW, preferably between 40 and 250 kW and particularly preferably between 80 and 170 kW.

Abstract: A system configured to generate heat when supplied with a first fuel or a second fuel can include a fuel supply line operatively connected to a fuel source. A valve assembly can be operatively connected to the fuel supply line. A main burner can be operatively connected to the valve assembly. A thermoelectric generating system can be configured to transform heat to electricity. A first pilot burner can include at least one of a first thermocouple and a first Fe-ion sensor. A second pilot burner can include at least one of a second thermocouple and a second Fe-ion sensor. A printed circuit board (PCB) can be operatively connected to the valve assembly and the first and second pilot burners. The PCB can be configured to control operation of the valve assembly based on information received from at least one of the first and second pilot burners.

Abstract: A system for controlling activity in a combustion chamber. The system does not necessarily need to be mechanically adjusted and yet may provide precise control of a fuel air mixture ratio. A sensing module of the system may have a mass flow sensor that relates to air flow and another sensor that relates to fuel flow. Neither sensor may need contact with fuel. Fuel and air to the system may be controlled. Pressure of the fuel and/or air may be regulated. The sensors may provide signals to a processor to indicate a state of the fuel and air in the system. The processor, with reliance on a programmed curve, table or the like, often based on data, in a storage memory, may regulate the flow or pressure of the fuel and air in a parallel fashion to provide an appropriate fuel-air mixture to the combustion chamber.

Abstract: A turbine engine includes a compressor section, a combustor in fluid communication with the compressor section, and a turbine section in fluid communication with the combustor section. The combustor includes a combustor region defined by at least one bulkhead panel and at least one heat shielding panel inside the combustor region. The at least one heat shielding panel is connected to the bulkhead panel via at least one cooled fastener.

Abstract: A fuel injector assembly for a combustor including an axially staged fuel injector includes an injector body having an inner wall and a boss that is rigidly connected to the injector body the boss includes an inner wall. The inner wall of the boss and the inner wall of the injector body together define a flow passage of the fuel injector assembly. The injector body defines an inlet to the flow passage and the boss defines an outlet of the flow passage.

Abstract: An improved fuel air premix chamber for a gas turbine engine. An integral heat exchange structure is used to cools the premix chamber outer wall, preheating the compressor air supply as it passes into an inner central longitudinal premix tube and preheating also the fuel and F/A mixture for an improved mix, low emissions combustion and low differential combustor pressure. The F/A premix flow thru the central longitudinal tubes and yields an exiting spouting velocity into the primary combustion zone for swirl/circumferential flow combustion yielding flame stability.

Abstract: The invention relates to a can-combustor for a can-annular combustor arrangement in a gas turbine. The can combustor includes an essentially cylindrical casing with an axially upstream front panel and an axially downstream outlet end. The can combustor further includes a number of premixed burners, extending in an upstream direction from said front panel and having a burner exit, supported by this front panel, for supplying a fuel/air mixture into a combustion zone inside the casing. Up to four premixed burners are attached to the front panel in a substantially annular array. Each burner has a conical swirl generator and a mixing tube to induce a swirl flow of said fuel/air mixture.

Abstract: A domestic oven is provided having a hinged door with a handle. The hinged door includes at least one external glass panel coupled to one or more vertical bars defining a structure of the hinged door and an elongated element is coupled to an upper edge of the at least one external glass panel. The elongated element is positioned between the structure and the handle with at least one external glass panel interposed therein.

Abstract: A cooking device includes a frame forming a cooking chamber; a door opening and closing the cooking chamber; a burner cover disposed in the cooking chamber; and a burner located in the burner cover, the burner generating a flame, wherein the burner cover is provided with a first hole providing a path through which air flows, and the frame is provided with a second hole communicating with the first hole, the second hole providing a path through which the air flows.

Abstract: The present invention relates to a system for heating and/or cooling and/or ventilating and/or illuminating a room, comprising a plurality of air-conditioning modules having a flat surface which faces the room and which is designed to dissipate heat and/or cold and/or fresh air to the room; at least one distribution module which is designed to provide the plurality of air-conditioning modules with a fluid carrier medium for heat and/or cold and/or fresh air; and a control device for controlling a quantity of heat and/or cold and/or fresh air; wherein the contours of the plurality of air-conditioning modules and the at least one distribution module are designed in such a way that the plurality of air-conditioning modules and the at least one distribution module form, by virtue of their assembly, a substantially flat and continuous surface.

Abstract: An air conditioner includes: a suction body having an air suction hole formed therein; a heat exchanger in which air sucked into the air suction hole is heat-exchanged; and a pair of blow discharge units through which the air heat-exchanged in the heat exchanger is passed and discharged. In the air conditioner, each of the pair of blow discharge units includes: a discharge body in which an air inflow hole and an air discharge hole are formed to be spaced apart from each other, and a discharge passage is formed between the air inflow hole and the air discharge hole; a rotation mechanism for rotating the discharge body about a vertical center axis; a cross flow fan rotatably positioned in the discharge passage, the cross flow fan being disposed vertically long in the discharge passage; and a fan motor having a vertical rotational shaft for rotating the cross flow fan.

Abstract: An evaporative cooling device may be provided. The device may comprise a plurality of rollers, a screen looped around the plurality of rollers, a motor coupled to at least one roller and configured to drive the at least one roller, a basin configured to hold a liquid within an interior of the basin, and wherein at least one roller is at least partially within the interior of the basin. The screen may travel into the basin and capture an amount of the liquid. As the liquid is drawn into an airstream feeding a heat rejection device, the liquid may evaporate, cooling the air. The cooled air may provide a more efficient heat rejection device.

Abstract: A computer-implemented method of controlling an operational mode of an outdoor unit connected to a plurality of indoor units, the method including: determining an operational mode of an outdoor unit; determining, at a master decision unit, a target outdoor mode for the outdoor air-conditioning unit based on the priority, the current area mode, the current area temperature, and the set point for each of the indoor units, the maximum actual standby duration and the maximum allowable standby duration of each of the indoor units, and the minimum active duration and the current active duration for the outdoor unit; and systematically controlling the operational mode to become the target outdoor mode when the target outdoor mode is different from the operational mode.

Abstract: A system and method for crowd-sourced environmental system control and building maintenance includes a server for providing selective access to building occupants and managers. Users are permitted to generate building reports in the form of (i) thermal reports using a thermal report module, and/or (ii) maintenance reports using a maintenance report module. The reports are each geo-located to locations within the building, and are then captured, stored, and aggregated at the server. The aggregated reports are sorted according to their geo-locations and comfort rules are used to (i) permit a manager at a client computer to access the server to respond, and/or (ii) automatically respond and assign a response status to particular reports. An inspection checklist interface is generated and populated to display a list of preventative maintenance tasks, each of the tasks being user-selectable to designate completion, with the updated status of the reports being stored at the server.

Abstract: An HVAC system includes an HVAC unit having a cooling mode and a heating mode for conditioning the air in an inside space, and a programmable thermostat located remotely from the HVAC unit. The HVAC unit may have an onboard controller configured to control when the HVAC unit is in the cooling mode or heating mode, and whether the HVAC unit is activated or not. In some cases, the onboard controller of the HVAC unit may use a common temperature setpoint when controlling in the cooling mode and the heating mode. The programmable thermostat may have a programmable schedule with a plurality of time periods, where each time period has a heating setpoint and a cooling setpoint separated by a dead band. The onboard controller of the HVAC unit may be configured to accept input signals from the remotely located thermostat.

Abstract: An information notification method for use in an information notification system connected to an air conditioner including a refrigerant circuit and an information communication apparatus includes detecting a connection state indicating whether the air conditioner is connected to a network, determining whether the air conditioner performed a refrigerant recovery operation on the refrigerant circuit on the basis of the operation log information that indicates an operation log of the air conditioner and that is received from the air conditioner, determining whether the air conditioner has been relocated on the basis of the detected connection state and the determination as to whether the air conditioner performed the refrigerant recovery operation, and sending, to the information communication apparatus, first information used to prompt for a test operation of the air conditioner if it is determined that the air conditioner has been relocated.

Abstract: A system includes one or more systems, a controller and a server. The one or more systems including one or more heating, ventilation, and air conditioning (HVAC) systems, refrigeration systems, or building automation systems. The controller is communicatively coupled to the one or more systems. The server is communicatively coupled to the controller. The controller receives telemetry data associated with the operation of the one or more systems. The received telemetry data includes data associated with individual components of the one or more systems. The controller also determines a subset of the telemetry data that has changed by comparing the received telemetry data to previous telemetry data. The controller also communicates to the server only the subset of the telemetry data that has changed.

Abstract: Entrance of cold air from near a wall of an indoor space is avoided. An airflow direction adjusting flap is provided at a main outlet opening of the casing, and changes a direction of air supplied from the main outlet opening in a vertical direction. The heat exchange temperature sensor detects a temperature of the indoor heat exchanger. A motor controller controls the airflow direction adjusting flap to operate in an airflow mode, in which air is supplied from the main outlet opening at least horizontally, when a value detected by the heat exchange temperature sensor is greater than a first predetermined value in the heating operation.

Abstract: An air-conditioning apparatus includes refrigerant systems that each include an outdoor unit and indoor units and that air-condition a single room, and circulators for making a temperature distribution in the room uniform. The air-conditioning apparatus determines a load on each of the two refrigerant systems in operation, and, if it is determined that improvement of operating efficiency is possible on the basis of the determination result, performs a system-selective operation in which operation of one of the refrigerant systems determined to be under a low load is stopped and the other refrigerant system determined to be under a high load is selectively performed, and causes the circulators to transport blown air blown from the indoor units of the refrigerant system determined to be under a high load to an air-conditioned zone of the refrigerant system determined to be under a low load.

Abstract: An air-conditioning apparatus determines whether or not to permit an air-conditioning operation based on refrigerant amount information stored in an outdoor unit and installation height information stored in an indoor unit.

Abstract: The invention discloses a movement mechanism for a panel mechanism of a household appliance wherein, the movement mechanism includes: a rotary disc (21), rotatably provided, a first support (22) is fixedly provided on the rotary disc (21), and a free end of the first support (22) having a first connection portion; and a second support (23), the second support (23) and the rotary disc (21) being hinged to a second connection portion, a first end of the second support (23) having a third connection portion, and the third connection portion being movable along a predetermined track when the rotary disc (21) rotates.

Abstract: A boiler includes a chamber designed to receive and conduct hot exhaust gases, the chamber being enclosed by two plate elements which have an angled design and are arranged relative to one another in a sandwich-like manner, and the chamber being connected to a flow guide that is designed between the plate elements and used to cool the hot exhaust gases. The flow guide is designed in the form of a flat gap channel which fully encloses the periphery of the chamber.

Abstract: A control device configured to control a power to be supplied to a heater unit. The control device cuts off the power to be supplied to a heating portion when it is determined that an event where a maximum temperature that the processing liquid within the heater unit reaches exceeds a processing liquid upper limit temperature is likely to occur even when a supply of the power to the heating portion is stopped based on an actual temperature of the processing liquid measured by a temperature detector under an assumption that a flow of the processing liquid flowing in a processing liquid supply line is stopped.

Abstract: A device is describe for collecting energy in electromagnetic radiation, where the device includes a first panel that includes a first height, a first end, and a second end such that a first length is defined between the first end and the second end. The device further includes a second panel that includes a second height, a third end, and a fourth end such that a second length is defined between the third end and the fourth end. In addition, the first height and the second height are substantially parallel to a reference axis, the first end and the third end intersect to form a leading edge that is substantially parallel to the reference axis, and the first panel and the second panel form a channel positioned between the first panel and the second panel.

Abstract: Disclosed is a solar refraction device (“SRD”) for heating industrial materials in a heating container, having a bottom, with diffuse solar energy that impinges on an outside surface of the SRD and is refracted through the SRD. The SRD may include a lens array assembly and a plurality of lens panes attached to the lens array assembly. The lens array assembly may include an outside surface corresponding to the outside surface of the SRD, an inside surface, and a plurality of lens array sub-assemblies.

Abstract: A super-cooled liquid medium, preferably super-cooled liquid nitrogen, is pumped through a sub-cooler and cooled by the same medium that evaporates in the vacuum. This super-cooled nitrogen is used as coolant for a consumer. If a small amount of heat is emitted by the consumer to the nitrogen, the liquid medium can be guided in the circuit wherein the sub-cooler is arranged. For compensating volume fluctuations, such a circuit requires a compensation vessel, which is very expensive and can only be operated in the presence of a super-cooled medium when either a part of the medium is heated using external energy, or an inert gas which boils at very low temperatures is used as a pressure compensation medium. According to the disclosure, when a supply container for the liquid medium is integrated into the cooling circuit and used as a compensation vessel, a separate compensation vessel is not required.