93 results about "Heat rejection" patented technology

A metal coupon for repairing a component includes an additively manufactured (AM) metal member having a conduit in an interior of the AM metal member, and a first porous region around the conduit. The conduit is hollow. The porous metal coupon with conduit allows a braze material to be directed based on characteristics of the first porous region. A second porous region may be provided inside the conduit to increase heat rejection of the conduit.

A system may include a first heat rejection unit including a first set of fans and coils and a second heat rejection unit configured to be stacked on top of the first heat rejection unit, where the second heat rejection unit includes a second set of fans and coils. The system may include one or more central passages configured to connect the first heat rejection unit to the second heat rejection unit, where the one or more central passages separate the first heat rejection unit into a first section and a second section. The system may include an inlet duct configured communicate with outside and receive fresh ambient air via an opening in the inlet duct, where the inlet duct is configured to divert the fresh ambient air to at least one of the first heat rejection unit or the second heat rejection unit to be exhausted outside.

The invention relates to an electric propulsion heat dissipation system, a power device and an aircraft, and relates to the technical field of aircrafts. The electric propulsion cooling system comprises propellers, arms, power motors and radiators, the electric propulsion cooling system is fixedly connected to an aircraft body structure of the aircraft through the arms, the propellers are arranged at the output ends of the power motors, and the power motors are installed on the arms and can drive the propellers to rotate around the axes of the power motors. The radiator dissipates heat of the power motor through cooling liquid circulation, the vehicle arms are provided with heat dissipation grooves and air outlets, the radiator is installed in the heat dissipation grooves, and orthographic projections of blades of the propeller on the corresponding surfaces of the vehicle arms at least partially cover the radiator, so that airflow generated by the propeller can penetrate through the radiator and then enter the external space through the air outlets. According to the electric propulsion heat dissipation system, the power device and the aircraft, the problem that the lightweight design of the aircraft is affected due to the fact that a current cooling system is large in size and weight is solved.

A modular data center can include a shipping container housing an immersion tank having a primary condenser in thermal communication with an interior volume of the immersion tank and a vapor management system fluidically connected to the immersion tank. The vapor management system can enable the apparatus to effectively manage periods of high vapor production by removing vapor and other gases from a headspace of the immersion tank, condensing the vapor to liquid, and returning the liquid to the immersion tank. The modular data center can include an external heat rejection system mounted outside the shipping container and fluidly connected to the primary condenser.

The invention relates to an electric propulsion heat dissipation system, a power device and an aircraft, and relates to the technical field of aircrafts. The electric propulsion heat dissipation system comprises a propeller, a machine arm and an electric engine, the machine arm is fixedly connected to a machine body structure of the aircraft, the propeller is arranged at the output end of the electric engine, the machine arm is provided with an assembling space, and the electric engine is installed in the assembling space and can drive the propeller to rotate around the axis of the electric engine; a flow inlet is formed in the surface of the side, facing the propeller, of the vehicle arm, airflow generated when the propeller rotates can at least partially cover the flow inlet, a flow outlet is formed in the surface of the side, deviating from the propeller, of the vehicle arm, and the airflow can flow through the electric engine arranged in the assembling space through the flow inlet and enter the external space through the flow outlet. According to the electric propulsion heat dissipation system, the power device and the aircraft provided by the invention, the problem that the heat dissipation capability of the electric propulsion heat dissipation system is poor under the flight working conditions of hovering or vertical take-off and landing and the like of the existing aircraft is solved.

A heat transfer system for collecting heat rejected from a heat source is disclosed. The system includes: a first set of heat rejection units arranged adjacent to each other and configured to direct heated air toward a center. The heated air from the heat source flows upward from the center. Each of the first set of heat rejection units includes a housing, a heat exchanger, and a fan arranged facing toward the center of the system and configured to direct the heated air toward the center.

A drift elimination system for evaporative heat rejection equipment. The drift elimination system includes a first and second set of electrodes positioned apart from one-another in the air flow downstream of the fill and spray system. The first set of electrodes, optionally in the form of needles or thin plates are energized with a positive or negative charge. The second set of electrodes, optionally in the form of wavy plates or a wire mesh are energized with the opposite charge. Water droplets passing over or through the first set of electrodes accept a charge from the first set of electrodes and are attracted to the second set of electrodes where they are collected, removing the charged droplets from the airflow, reducing water loss and abating plume formation.

A multi-temperature hydronic system (MTHS) (10) comprises a plurality of heat rejection devices including at least two of an evaporative fluid cooler (28), a dry cooler (30), or a heat recovery heat exchanger (32). The MTHS (10) also includes an MTHS skid (11) having a plurality of valves (50, 52, 54, 58, 60, 61, 62, 64, 66, 74, 76, and / or 78) controllable to adjust fluid flows of a fluid between the plurality of heat rejection devices, a chiller oil cooler (16a), and a chiller condenser (14a). The MTHS (10) also includes a controller (34) configured to control the plurality of valves (50, 52, 54, 58, 60, 61, 62, 64, 66, 74, 76, and / or 78) to selectively engage at least one heat rejection device of the plurality of heat rejection devices to achieve a target temperature of the fluid at the chiller oil cooler (16a), and to optimize a temperature of the fluid at the chiller condenser (14a). Other features may include a spray water circuit (175) of the evaporative fluid cooler (28) and control features related to the evaporative fluid cooler (28) and configured to, among other things, periodically replace water in the spray water circuit (175).

This invention relates to the field of building energy conservation and refrigeration technology, and provides a building heat dissipation system combining organic Rankine cycle and nighttime radiative heat dissipation. The system includes an evaporator, a generator set, a nighttime radiative heat dissipation device, a working fluid pump, a working fluid storage device, and an electricity storage device. This system absorbs the heat transferred to the indoor side by the phase change material layer during summer nights and dissipates the heat to the external environment in the form of thermal radiation. This achieves cooling of the phase change material layer during summer nights, ensuring the phase change material's effect of reducing indoor temperature rise during the day, while maintaining indoor thermal comfort at night. Through the organic Rankine cycle, it achieves the purpose of generating electricity using a low-temperature heat source, fully utilizing the waste heat of the phase change material layer, improving the system's energy utilization rate, achieving self-sustaining operation, and exhibiting good stability. This effectively improves the building energy conservation technology of applying phase change materials in walls and contributes to achieving energy conservation goals.

An atmospheric water generator apparatus. In one embodiment, the apparatus includes a fluid cooling device. A water condensing surface is thermally connected to the fluid cooling device, the water condensing surface having a superhydrophobic condensing surface, a highly hydrophobic condensing surface, a superhydrophilic condensing surface, a highly hydrophilic condensing surface, or a combination thereof. An air-cooled heat rejection device is in fluid communication with a fluid cooling device. An air fan is configured to induce airflow across the water condensing surface in order to condense and extract water from the atmosphere.

The present disclosure relates to materials, and specifically to materials such as sheet, molded or extruded polymer materials containing flake, formed, powdered, granulated or splintered borosilicate glass for heat rejection or mitigation and enhanced durability and strength. The invention provides a synthetic substrate that includes: 1 to 70 wt % borosilicate glass having an average size of 0.1 to 50 um; and 30 to 99 wt % polymer material, wherein the synthetic substrate has either a denier ranging between 0.1 to 20.0 or a thickness ranging between 0.1 to 20 MIL, which provides thermal management properties including reduction in solar absorptance and net power absorbed by surfaces. The greater the intensity of the solar radiation the more reactive the borosilicate becomes, reflecting and dissipating an increased level of energy.

The utility model discloses a full-injection ejector refrigerating circuit which comprises a plurality of compressors, a heat removal heat exchanger / gas cooler, an ejector and a receiver. The inlet end of the compressor unit is connected with a gas outlet of the receiver, the outlet end of the compressor unit is connected with a three-way valve, and one end of the three-way valve is connected with the inlet end of the heat removal heat exchanger / gas cooler through a bypass pipe. A heat recoverer is connected in series between the other end of the three-way valve and the inlet end of the heat removal heat exchanger / gas cooler; an outlet end of the heat rejection heat exchanger / gas cooler is connected with a main high-pressure input port of the ejector, and an inlet of the receiver is connected with an output port of the ejector; a secondary low-pressure input port of the ejector is connected with a liquid outlet end of the receiver through a refrigerating pipe group; according to the utility model, the energy recovery efficiency of the ejector is improved, so that the system can still operate efficiently under the conditions of low pressure difference, low load and multiple working conditions.

The application relates to an electric propulsion heat dissipation system, a power device and an aircraft, and relates to the technical field of the aircraft. The electric propulsion heat dissipation system comprises an electric motor, a propeller and a movable nacelle, the propeller is connected to the output end of the electric motor, and the movable nacelle is rotatably connected to the body structure of the aircraft; the movable nacelle is provided with a nacelle cavity, the electric motor is installed in the nacelle cavity, the head part of the nacelle is provided with a head part air inlet communicating with the nacelle cavity, and the tail part of the nacelle is provided with a tail part air outlet communicating with the nacelle cavity. The electric propulsion heat dissipation system, the power device and the aircraft provided by the application solve the problem that the existing nacelle is more difficult to effectively discharge hot air, thereby causing the electric propulsion system to overheat.

The present application provides a method of controlling a vehicle thermal management system, the method comprising the steps of: determining a vehicle required heat based on a cabin heating required heat and a battery warming required heat when a heating, ventilation, and air conditioning (HVAC) subsystem is in a heating mode; controlling operation of the HVAC subsystem and a coolant subsystem based on the determined vehicle required heat being greater than a predetermined threshold to minimize compressor work of the HVAC subsystem and to minimize heat rejection of a refrigerant circulating in the HVAC subsystem; determining a refrigerant heat absorption, wherein the refrigerant heat absorption is heat absorbed by the refrigerant from the coolant, outdoor air, and the compressor; and increasing the compressor work of the HVAC subsystem by a predetermined value based on the determined refrigerant heat absorption being greater than the refrigerant heat rejection.

A ground testable spacecraft heat pipe has a spacecraft heat pipe thermally connected for conduction of heat through a heat acquisition cold plate to a heat acquisition riser of a bubble pump heat pipe, enabling a plug-slug flow of heated fluid into a separator, with heated liquid flowing downward through a hear rejection downcomer to a heat rejection pipe section mounted on a heat rejection cold plate for conduction of heat to a bottom end of the spacecraft heat pipe, the now-cooled liquid flowing through a heat rejection riser to an outlet in a condenser that receives the heated vapor from the separator through a vapor condensation conduit, the condenser holding the cooled fluid and vapor condensate that exits the condenser through a heat acquisition downcomer to restart the cycle.

The invention relates to a heat rejection system and a cooling system. The heat rejection system may include: a first heat rejection unit including a first set of fans and coils; and a second heat extraction unit configured to be stacked on top of the first heat extraction unit, where the second heat extraction unit includes a second set of fans and coils. The system may include one or more central passages configured to connect the first heat rejection unit to the second heat rejection unit, where the one or more central passages divide the first heat rejection unit into a first section and a second section. The system may include an inlet conduit configured to communicate with the outside and receive new ambient air via an opening in the inlet conduit, where the inlet conduit is configured to divert the new ambient air to at least one of the first heat rejection unit or the second heat rejection unit to be discharged to the outside.

A heat transfer system (200) for high transient heat loads includes a fluid, a heat exchanger (204); a compressor (206) downstream of the heat exchanger outlet (260); a condenser (208) downstream of the compressor outlet (266), and a thermal energy storage (TES) section (210) downstream of the condenser outlet (272) and upstream of the heat exchanger (204). The TES section (210) may include a first pressure regulating valve (222) downstream of a TES unit (220); and a second pressure regulating valve (216) upstream of the first pressure regulating valve (222).

A component includes a body and an additively manufactured (AM) metal coupon that includes a primary member having a member porosity between 2% to 50% open space volume to total volume of the primary member. The primary member includes a first portion and a second portion distanced from the first portion by a gap. At least one thermal transfer structure, such as pin(s) and / or fin(s), extends between the first and second portions across the gap. A braze material couples the AM metal coupon in a coupon opening in the body, and infiltrates into the primary member based at least on a characteristic of the member porosity. The braze material may also infiltrate the thermal transfer structure(s), which may have the same or different porosity from the primary member. The thermal transfer structure(s) exhibit enhanced heat rejection, reduce weight of the component, and may improve component vibratory response.

An aircraft propulsion system includes an engine, a propulsor drive shaft drivingly engaged with the engine, a propulsor for propelling the aircraft, and a fan driving cooling air along a flow path in thermal communication with the engine. The engine can be an internal combustion engine or other engine type having heat rejection requirements, and the fan can facilitate cooling of the engine. The propulsion system can have a propulsor configuration.

Heat rejection devices, including cooling towers, condensers and closed circuit coolers, having side-mounted backward-curved centrifugal fans mounted on top of the device, above a fan plenum instead of a top-mounted axial fan. Heat rejection capability can be easily modified by adding or subtracting fans without impacting unit footprint. Also, the ability to handle higher static pressures allows for the use of a more densely packed heat exchanger in the same footprint unit, which will increase the unit performance.

A component includes a body and an additively manufactured (AM) metal coupon that includes a primary member having a member porosity between 2% to 50% open space volume to total volume of the primary member. The primary member includes a first portion and a second portion distanced from the first portion by a gap. At least one thermal transfer structure, such as pin(s) and / or fin(s), extends between the first and second portions across the gap. A braze material couples the AM metal coupon in a coupon opening in the body, and infiltrates into the primary member based at least on a characteristic of the member porosity. The braze material may also infiltrate the thermal transfer structure(s), which may have the same or different porosity from the primary member. The thermal transfer structure(s) exhibit enhanced heat rejection, reduce weight of the component, and may improve component vibratory response.

The application discloses a high-temperature molten salt heat release system, which comprises a cold salt tank, a hot salt tank, a gas supply system, a water supply system, a steam molten salt heat exchanger and a water supply molten salt heat exchanger, the input end of the hot salt tank is connected with the gas outlet end of a heat storage system, the output end is connected with the steam molten salt heat exchanger and an adjacent hot salt tank, the heat input end of the steam molten salt heat exchanger is connected with the hot salt tank, the heat output end is connected with a reheater outlet header and a thermal system respectively, and the gas inlet end is connected with the gas supply system, the heat input end of the water supply molten salt heat exchanger is connected with the steam molten salt heat exchanger, the heat output end is connected with the thermal system, the cold outlet end is connected with the cold salt tank, the water inlet end is connected with the water supply system, and a heat utilization pipeline is arranged between the water inlet end and a high-pressure water supply pipeline of the water supply system, the application can realize the reduction of unit coal consumption by improving the temperature of the water supply and the cold reheated steam, and can avoid the problem that the molten salt outlet temperature can only reach the water side pressure saturation temperature value, thereby reducing the molten salt utilization temperature interval.

The invention relates to a heat extraction fan assembly, a heat extraction unit and a fan motor cooling subsystem. The heat extraction fan assembly may include a set of fan blades. The heat rejection fan assembly may include a fan motor coupled to a set of fan blades via a motor shaft and configured to cause the set of fan blades to: move a first air volume through the heat exchanger; and moving the first air volume through the shroud opening. The heat rejection fan assembly may include a fan motor cooling subsystem configured to cool a fan motor.

Disclosed herein are systems and methods for providing hot air or hot dehumidified air to a facility using an energy recovery high efficiency dehumidification system. The energy recovery high efficiency dehumidification system can include an air filter bank that receives air from a first inlet source, a supply fan that causes the air to flow from the first inlet source, a cooling coil configured to cool and reduce a relative humidity of the air that passes over the cooling coil, a cooling recovery coil coupled with the cooling coil and configured to heat the cooled air to generate cooled dehumidified reheated air in a cooling recovery coil plenum, an equipment room configured to surround mechanical and electrical equipment and further heat received cooled dehumidified reheated air, and a heat rejection coil that rejects heat from one or more components of the mechanical and electrical equipment to further heat the air.

The hot wall heat rejection system may include a first heat rejection unit including at least a first set of one or more first fans and a first coil. The system may also include a second heat rejection unit disposed proximate to the first heat rejection unit. The second heat rejection unit may also include a second set of one or more second fans and a second coil. The one or more first fans of the first heat rejection unit may face the one or more second fans of the second heat rejection unit to define a heat outlet channel. The first coil of the first heat rejection unit may face the second coil of the second heat rejection unit to define a cold inlet passage.

In one aspect, a heat rejection apparatus is provided including an evaporative heat exchanger and a primary fan operable to direct first ambient air into an air inlet, cause the first ambient air to interact with the evaporative heat exchanger to produce heated air, and discharge the heated air from an air outlet. The heat rejection apparatus includes a plume abatement fan operable to direct second ambient air into contact with the heated air downstream of the evaporative heat exchanger and a controller operably coupled to the primary fan and the plume abatement fan. The controller has a plume abatement mode wherein the controller operates the plume abatement fan to cause the plume abatement fan to direct the second ambient air into contact with the heated air to cool the heated air and abate plume.

The utility model discloses a double-cold-source heat pipe multi-connected energy-saving heat extraction system coupling a natural cold source and mechanical refrigeration, which comprises a plurality of water-refrigerant double-coil heat exchange units, a cooling tower and a heat pipe air conditioner all-in-one machine unit, wherein the water-refrigerant double-coil heat exchange unit is arranged in a machine room and is provided with a water coil heat exchanger and a refrigerant coil heat exchanger, the heat pipe air conditioner all-in-one machine unit comprises a heat pipe condenser, an air-cooled condenser, an expansion valve, an intermediate heat exchanger and a compressor, and the water coil heat exchanger and a cooling tower form a water circulation heat exchange loop utilizing a natural cold source. And the refrigerant coil heat exchanger, a heat pipe condenser and an intermediate heat exchanger in the heat pipe air conditioner all-in-one machine unit form a refrigerant circulating heat exchange loop in which one or combination of a natural cold source and mechanical refrigeration is selected. According to the utility model, a natural cold source and mechanical refrigeration can be selected or combined according to environmental conditions and load requirements, and the system is especially suitable for temperature control of a high-density server room.

A heat exchanger system including a controller configured to direct a first power signal to a first cooling fan module to operate a first motor at a first rotational speed to provide a first flow rate to satisfy the first demanded heat rejection rate, direct a second power signal to the second cooling fan module to operate the second motor at a second rotational speed to provide a second flow rate to satisfy the second demanded heat rejection rate while maintaining a rotational speed differential between the first rotational speed and the second rotational speed, such that an acoustic property of at least one of the first heat exchanger assembly and the second heat exchanger assembly is below a predetermined acoustic property threshold.

A thermal wall heat rejection system may include a first heat rejection unit including at least a first set of one or more first fans and a first coil. The system may further include a second heat rejection unit arranged proximate to the first heat rejection unit. The second heat rejection unit may further include a second set of one or more second fans and a second coil. The one or more first fans of the first heat rejection unit may face the one or more second fans of the second heat rejection unit to define a hot outlet aisle. The first coil of the first heat rejection unit may face the second coil of the second heat rejection unit to define a cold inlet aisle.

An aircraft propulsion system includes a core engine that includes a main compressor where an inlet airflow is compressed and communicated to a combustor to generate an exhaust gas flow that is expanded through a main turbine section to generate power that is used to drive the main compressor and a propulsive fan, a bottoming cycle where a working fluid is heated and expanded through a bottom turbine to generate shaft power, the bottoming cycle includes a primary compressor loop that includes a first bottoming compressor and a secondary compressor loop that includes a second bottoming compressor and the flow of working fluid flow is adjusted to flow through at least one of the primary compressor loop and the secondary compressor loop, an exhaust gas heat exchanger where heat from the exhaust gas flow heats the working fluid of the bottoming cycle, a cryogenic fuel system that includes a cryogenic fuel storage tank, a fuel flow path for routing the cryogenic fuel to the combustor of the core engine, and a fuel / working fluid heat exchanger for cooling the working fluid within the primary compressor loop. The secondary compressor loop bypasses the fuel / working fluid heat exchanger.