High temperature cooler heating power check method and system

Abstract

The invention relates to a high temperature cooler heating power check method and system. The method comprises the following steps that cooler inlet parameters and the quantity of heat exchange tube groups in a cooler are obtained, wherein each heat exchange tube group comprises a plurality of rows of tube bundles; and the cooler inlet parameters are used as an inlet condition of first-row tube bundles, an outlet condition of each row of tube bundles is used as the inlet condition of the next-row tube bundles, and heat transfer and pressure drop of all rows of tube bundles are calculated row by row. By means of the high temperature cooler heating power check method and system, according to the thought of calculating heating power characteristics of all tube bundles row by row in a heat exchanger, determination of high-temperature gas qualitative properties under the large temperature difference condition can be reduced, and the design error is reduced; and heat transfer, pressure dropand heat exchange tube wall temperature distribution, which cannot be given by a traditional heat exchanger heating power design checking method, inside the heat exchanger can be given, and it is conducive to timely find problems in the heat exchange scheme design stage to make modification and adjustment.

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...

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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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