7 results about "Radiant heat transfer" patented technology

The present invention relates to a cryogenic storage tank equipped with an external evaporative cooling blocking device capable of simultaneously vaporizing liquefied gas and insulating the cryogenic tank, thereby ensuring thermal insulation performance and replacing a heat exchanger. A cryogenic storage tank equipped with an external evaporative cooling blocking device capable of simultaneously vaporizing liquefied gas and insulating the cryogenic tank according to one embodiment of the present invention may include: an inner tank for storing a cryogenic fluid and having one or more transfer pipes on one side for transferring the cryogenic fluid; an outer tank that surrounds the inner tank; a vacuum insulation layer for forming a vacuum space between the inner tank and the outer tank; and an evaporative cooling blocking device installed on the outer wall of the outer tank, which transfers radiant heat to the cryogenic fluid introduced through the transfer pipe to raise the temperature of the cryogenic fluid to room temperature.

A clamping system includes a workpiece clamp (102) having a platform (108) for supporting a workpiece (106) and a heating element (118) for heating the platform (108) to a platform temperature. A cooling plate (122) has cooling features to cool the plate. A vacuum chamber (128) defines a cavity volume between the platform (108) and the cooling plate (122). One or more radiation shields (140) within the cavity volume (128) can limit radiative heat transfer between the platform (108) and the cooling plate (122). A vacuum source (134) and a gas source (142) are selectively fluidly coupled to the cavity volume. The controller (156) controls the heat transfer between the control plate (108) and the cooling plate (122) by controlling the pressure in the vacuum chamber (128) via the vacuum source (134) and the gas source (142), thereby controlling the temperature of the control plate (104) in the high temperature range and the low temperature range.

The application discloses a molten metal splash protective clothing and a preparation process thereof and belongs to the field of individual protection equipment. The process comprises the following steps: weaving after blending meta-aramid 65-75%, para-aramid 15-20% and flame-retardant viscose fiber 10-15%; adopting a two-dip-two-pad method to dip and pad finishing liquid containing 5-8% nano-alumina sol, 3-5% polytetrafluoroethylene emulsion and 2-3% phosphorus flame retardant; performing super-feeding heat setting at 190-210 DEG C; compounding aluminum-coated film polyimide non-woven fabric through point-shaped hot melt adhesive; and finally sewing into clothes. The process has the advantages of process intensification, low energy consumption, more than 60% reduction of adhesive amount, air permeability greater than or equal to 50 mm / s, less than 1% of defective product rate and the like. The prepared protective clothing has the aluminum liquid impact greater than or equal to 350 g, the iron liquid impact greater than or equal to 200 g, the radiant heat transfer index RHTI24 greater than or equal to 20 s, the breaking strength greater than or equal to 800 N and the thermal stability dimensional change rate less than or equal to 2.5%, and the unity of high-grade protection and process economy is realized.

This invention provides a radiant calcining kiln, belonging to the field of calcining kiln technology. It includes a feeding device for lifting materials into the kiln; a calcining kiln for calcining the materials, comprising a preheating zone for preheating the materials, a calcining zone for calcining the materials, and a cooling zone for cooling the calcined materials; and a waste gas treatment system for treating the waste gas generated during combustion. This invention can calcine small materials with a diameter less than 20mm, solving the problems of easy nodule formation, poor permeability, and low utilization rate and resource waste in the calcination of small particles. During use, nodule formation is prevented, reducing the difficulty of production operations, and the heat from combustion can be fully utilized, achieving energy conservation and emission reduction. Through radiant heat transfer, the materials do not directly contact the flame, resulting in uniform heating, a low rate of undercooked materials, and no open flame inside the kiln, thus producing less ash and resulting in higher purity clinker.

This invention provides a method for predicting the temperature of a steel slab, which allows for the determination of the overall heat absorption rate without measuring the temperature of the steel slab inside the heating furnace, and enables the prediction of the temperature of the steel slab inside the heating furnace from the initial stages of operation using the determined overall heat absorption rate. [Solution] A method for predicting the temperature of a steel slab in a heating furnace, wherein the total heat absorption rate is determined using the amount of radiant heat transfer from the inner wall of the heating furnace to the steel slab, the amount of radiant heat transfer from the combustion gas to the steel slab, and the amount of convective heat transfer from the combustion gas to the steel slab, and the temperature of the steel slab in the heating furnace is predicted using the total heat absorption rate.

The present application relates to the field of automation control technology, specifically to a four-corner tangential reheating steam temperature adjustment method based on 1000MW unit tower furnace, comprising the following steps: obtaining wind speed density calculation momentum sum and tangential circle eccentricity evaluation quantity, generating regulation and control instruction in combination with diameter and furnace length to obtain radiation distance quantity, calculating latent heat absorption reference quantity according to the instruction and determining flow state boundary positioning quantity in combination with sensible heat reduction quantity, extracting resistance parameter to establish control valve end point pressure drop quantity, and converting temperature reduction water flow and flow capacity quantity through enthalpy drop total amount. In the present application, the tangential circle eccentricity is depicted through the momentum system and the radiation heat transfer distance is mapped, the regulation and control reference is established, the flow rate and the sensible heat positioning flow state boundary are associated, the dynamic pressure drop is solved to establish the pressure characteristic, the enthalpy drop offset is calculated to determine the temperature reduction water demand, the combustion heat load distribution and the water injection execution are closely coupled, the uneven heat absorption of the heating surface is corrected, the adjustment period is shortened, the steam temperature is stabilized, and the metal loss is reduced.

The application belongs to the technical field of new energy, and relates to an amorphous phase change peak regulation system and method based on photon-phonon cooperative excitation. The system comprises an optical processor, a phase change calculation unit and a near-field radiation heat transfer module. The phase change calculation unit comprises a copper substrate, an elastic interface modification layer arranged on the copper substrate, an amorphous phase change material layer arranged on the elastic interface modification layer, and a dielectric film layer covering the outer surface of the amorphous phase change material layer. The optical processor is connected with the dielectric film layer. The amorphous phase change material layer is connected with the near-field radiation heat transfer module. The application solves the problems of slow response speed, poor regulation and control capacity, and long energy conversion path in the prior art, and realizes direct, rapid and efficient regulation and control of power fluctuation of a power grid.