摘要:
Improved vapor chambers are provided using monolithic wick structures having deep features (≥150 um) and two or more different feature heights above the substrate. Such monolithic multi-level wick structures provide improved performance in vapor chambers by alleviating the tradeoff between fluid transport (which favors tall pin-fins) and heat transfer (which favors short pin-fins).
摘要:
A loop heat pipe includes a stacked structure formed by metal layers that are stacked, including an outermost metal layer arranged at one outermost surface of the loop heat pipe. The stacked structure forms an evaporator configured to vaporize a working fluid and generate vapor, a condenser configured to liquefy the vapor of the working fluid, a vapor pipe configured to connect the evaporator and the condenser, and a liquid pipe configured to connect the evaporator and the condenser, to form a loop-shaped passage. The outermost metal layer has an outer surface formed with grooves.
摘要:
A heat pipe device includes an outer pipe and at least one first capillary structure. The outer pipe is a hollow pipe and has a defined lengthwise direction, and the first capillary structure is accommodated along the lengthwise direction and positioned in the outer pipe, and at least one steam channel is formed between the first capillary structure and the outer pipe. Even if the heat pipe device is upside down, the heat pipe still can resist gravity and work normally to achieve the effect of using the heat pipe without being limited by the using direction.
摘要:
A heat pipe can include a microchannel heat exchanger at the heat absorbing end and another heat exchanger which is optionally also a microchannel heat exchanger at the heat sink end, with one or more pipes flowably connecting the two ends for transporting liquid working fluid to the head absorber and vaporized working fluid to the heat sink. The heat pipes may be used to cool electronic devices with rejection of heat outside an enclosure, and optionally outside a room, containing the electronic devices. The heat pipes may be used to cool photovoltaic or solar collection devices with rejection of heat to ambient air at a distance removed from the photovoltaic devices. Heat pipe systems are disclosed wherein the working fluid is a hydrofluorocarbon or a mono-chlorinated hydrofluoroalkene having a normal boiling point in a range from 10° C. to 80° C.
摘要:
A method is generally described which includes altering temperature. The method includes providing a housing having an external surface and an internal surface. The method also includes coupling at least one component within the housing. At least one component is configured to generate electrical energy in combination with other components, chemicals, or materials residing within the housing. Further, the method includes forming a plurality of microchannels coupled to at least one of the internal surface of the housing or at least one internal components. Further still, the method includes providing a thermal sink coupled to the microchannels. The thermal sink is configured to transfer heat energy to or from the microchannels. Yet further still, the method includes flowing a fluid through the microchannels and the thermal sink.
摘要:
A method is generally described which includes operating an electrical energy storage device or an electrochemical energy generation device includes placing an electrical load to draw current from the electrical energy storage device or the electrochemical energy generation device. The electrical energy storage device or the electrochemical energy generation device includes a housing having an external surface and an internal surface. The method also includes generating electricity by at least one component within the housing. At least one component is configured to generate electrical energy in combination with other components, chemicals, or materials residing within the housing. Further, the method includes thermal control the electrical energy storage device by transferring heat to a plurality of microchannels coupled to at least one of the internal surface of the housing or at least one components. Further still, the method includes rejecting the collected heat through a thermal sink coupled to the microchannels. The thermal sink is configured to transfer heat energy from the microchannels and to receive a fluid flowing through the microchannels.
摘要:
A method is generally described which includes operating an electrical energy storage device or an electrochemical energy generation device includes placing an electrical load to draw current from the electrical energy storage device or the electrochemical energy generation device. The electrical energy storage device or the electrochemical energy generation device includes a housing having an external surface and an internal surface. The method also includes generating electricity by at least one component within the housing. At least one component is configured to generate electrical energy in combination with other components, chemicals, or materials residing within the housing. Further, the method includes thermal control the electrical energy storage device by transferring heat to a plurality of microchannels coupled to at least one of the internal surface of the housing or at least one components. Further still, the method includes rejecting the collected heat through a thermal sink coupled to the microchannels. The thermal sink is configured to transfer heat energy from the microchannels and to receive a fluid flowing through the microchannels.
摘要:
A thermal management system includes a base element and a heat producing element disposed for heat transfer from the heat producing element to the base element. An adherent zone includes an adherent element in physical attachment between the heat producing element and the base element. A heat transfer zone, separate from the adherent zone, includes a heat pipe between the heat producing element and the base element. The heat pipe includes a circulatory flow path between an evaporator section and a condenser section, and a working fluid on the circulatory flow path.
摘要:
A system for extracting heat from an electronic device is provided. The system includes heat dissipation means positioned within a printed circuit board to form an in-board heat sink structure and a fluid heat transfer medium disposed in the heat dissipation means. The medium circulates through the heat dissipation means carrying heat away from the electronic device.
摘要:
The invention provides methods, apparatus and systems in which there is partial boiling of a liquid in a mini-channel or microchannel. The partial boiling removes heat from an exothermic process.