45results about How to "Eliminate thermal resistance" patented technology

A multi-stage compressor comprises a variable speed electrically driven rotodynamic compressor stage connected in series with and upstream of a water lubricated screw compressor stage and an intercooler arranged between the two compressors to reduce the temperature of gas entering the screw compressor stage. In the invention, the intercooler is a water spray intercooler, the water supply of which is shared with that of the water lubricated screw compressor.

A cooling and heating cup holder includes a holder body having a container shape, formed of a thermally conductive material, having a substantially uniform thickness, and having a contact portion pressed from an inner side to integrally protrude outward from one side surface thereof and having a contact surface forming a predetermined plane; a Peltier element including an operation surface and a heat radiating portion having an opposite row opposite to the operation surface and installed such that the operation surface is directly attached to the contact surface at an outer side of the holder body to transfer heat to the contact surface; and an air conditioner including a heat radiating duct in which the heat radiating portion of the Peltier element is buried and a blowing fan for blowing out air at one side of the heat radiating duct.

The thermal interface material includes gap filling fluid and metal particle dispersed in the fluid and capable of reacting with air. The particle capable of reacting with air is nanometer level particle. Inside the thermal interface material, the metal particle reacts with air in the interval of the heat source and heat dissipating assembly to reduce or even eliminate interval to lower heat resistance and raise heat conducting performance. The reaction product with high heat conducting performance may further improve the heat conducting performance of the thermal interface material.

The invention relates to a new type low thermal resistance cast iron cooling wall. The feature is that the identity material of cooling wall is nodular cast iron or gray cast iron and the cooling water channel in cooling wall is made up from pure copper. The clearance between the cooling wall identity and the outer wall of pure copper pipeline is below 0.1mm. The manufacture method includes the following steps: fixing the molded pure copper pipeline into the sand box; casting by molten iron of nodular cast iron or gray cast iron, and taking inertia vapor cooling to copper pipeline to molding. The invention eliminates the thermal resistance caused by anti seepage carbon coating layer to make the heat exchange efficiency sharply increase and prolong the useful life of cooling wall.

The invention provides a solar photovoltaic receiver used for a disk type high-power concentration system. The solar photovoltaic receiver comprises a transparent plate, an insulation optical fluid, a concentration solar cell assembly and a metal substrate, wherein the transparent plate comprises a disk type paraboloid portion, the outer surface of the disk type paraboloid portion of the transparent plate is provide with a coating, the transparent plate is fixedly connected with the metal substrate through side walls to form a flow channel, the flow channel is filled with the insulation optical fluid, the side walls are provided with a fluid inlet and a fluid outlet, the metal substrate comprises a disk type paraboloid portion and a plane portion, the concentration cell assembly is arranged at the disk type paraboloid portion of the metal substrate, and the concentration cell assembly is immersed in the insulation optical fluid. The solar photovoltaic receiver improves concentration ratio and optical efficiency of the disk type high-power concentration system, solves the heat dissipation difficulty of the system, designs the portion of the metal substrate for fixedly installing the cell assembly into a disk type paraboloidal shape, and improves the evenness of light intensity distribution at focal spots, thereby increasing power generation efficiency of the system, and reducing cost of photovoltaic power generation.

The invention belongs to the technical field of precision casting of directional solidification column crystal or single crystal test bars, and relates to a fired mold precision casting method for improving solidification heat dissipation conditions of a directional solidification casting. In the directional column crystal or single crystal test bar manufacturing process, selected mold shell materials are the same as universal mold shell materials. The shape of a mold shell is changed, the equal-distance variable cross section is increased, and a plurality of equal-distance rectangular grooves are formed. When the directional solidification test bars and the mold shell move to the position below a heat insulation plate together, mechanical expansion rings arranged in a directional solidification furnace are inlaid in the equal-distance rectangular grooves of the mold shell; the mechanical expansion rings expand downwards to remove the part, below the grooves, of the mold shell; the lower end of the directional solidification casting is in direct contact with cooling media, so that the heat exchange conditions of the directional solidification test bars and the cooling media are improved; and therefore, the cooling speed of the directional solidification casting and the temperature gradient of a solid-liquid interface are greatly improved, the dendritic crystal structure of the directional solidification casting is refined, dendritic segregation is reduced, and the mechanical property of the casting is remarkably improved.