High-temperature cooler thermal calibration method and system

Abstract

The present invention relates to a thermal calibration method and system for a high-temperature cooler, wherein the method includes the following steps: obtaining the inlet parameters of the cooler and the number of heat exchange tube groups in the cooler, wherein each heat exchange tube group includes multiple rows of tube bundles; The inlet parameters of the cooler are used as the inlet conditions of the first row of tube bundles, and the outlet conditions of each row of tube bundles are used as the inlet conditions of the next row of tube bundles, so that the heat transfer and pressure drop of each row of tube bundles are calculated row by row. According to the idea of ​​calculating the thermal characteristics of each tube bundle row by row inside the heat exchanger, the invention can effectively reduce the determination of the qualitative properties of high-temperature gas under the condition of large temperature difference, and reduce the design error; and can provide the thermal design check of the traditional heat exchanger The heat transfer, pressure drop and heat exchange tube wall temperature distribution inside the heat exchanger that cannot be given by the method are helpful for finding problems in time in the design stage of the heat exchanger and making modifications and adjustments.

Description

technical field [0001] The invention relates to the technical field of design and manufacture of heat exchangers, in particular to a thermal calibration method and system for a high-temperature cooler. Background technique [0002] The arc wind tunnel is an important heat exchange system for high-enthalpy (temperature) gas coolers in large-scale arc wind tunnels. The temperature of the transported high-temperature gas (over 6000K) is reduced to normal temperature through the principle of heat exchange, ensuring the long-term stable operation of the wind tunnel and the safety of the vacuum system. Different from the high temperature (not exceeding 2000K) and high pressure heat exchange medium faced by industrial standard heat exchangers, after the high pressure air is ionized by the arc heater, the dissociated gas medium before entering the cooler has low density (vacuum environment), high temperature (maximum temperature can exceed 6000K), thermal design and calibration are...

AI Technical Summary

Problems solved by technology

Due to the small temperature difference between the inlet and outlet (several hundred degrees) of traditional heat exchangers, the method of arithmetic mean temperature difference or logarithmic mean temperature difference is usually used to determine the qualitative parameters of the high-temperature fluid. In terms of the changes in the physical properties of high-temperature ionized gases, the calculation errors are huge, and it is obviously not suitable for the thermal calibration design of high-temperature gas coolers.

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