Method and device for testing heat exchange capability of heat exchanger

Abstract

The invention discloses a method and a device for testing the heat exchange capability of a heat exchanger. The method comprises: building an analog internal circulation system and an analog external circulation system; operating the two systems connected with a heat exchanger; adopting differential pressure detection to obtain practical operation air quantity in the two systems; comparing with aset air quantity to regulate the two systems; and collecting the temperature data of the internal circulation inlet and outlet of the heat exchanger as well as the external circulation inlet and outlet of the heat exchanger at the same time to obtain the heat exchange capability of the heat exchanger under different air quantities. The device comprises a master control mechanism, the analog internal circulation system, the analog external circulation system, temperature acquisition mechanisms and a differential pressure acquisition mechanism, wherein the master control mechanism is connected with the temperature acquisition mechanisms and the differential pressure acquisition mechanism, and the temperature acquisition mechanisms are respectively arranged in the analog internal circulationsystem and the analog external circulation system. The test method of the invention is convenient and simple, is easy to operate, and has high test data accuracy; and the device of the invention has low cost, simple structure, favorable stability of detection result and high data detection accuracy.

Description

technical field [0001] The invention relates to a detection method and equipment thereof, in particular to a test method and device for the heat exchange capacity of a heat exchanger. The method and device can test the heat exchange capacity of the same heat exchanger under different specific conditions, and can also test the heat exchange capacity of different heat exchangers under the same specific condition, so as to provide reference for product development and design. Background technique [0002] At present, many electronic equipment cabinets, such as outdoor power supply system cabinets, etc., generate a lot of heat during the operation of the equipment. In order to ensure the normal operation of the equipment, it is necessary to dissipate heat from the cabinet. Exchange and circulate the hot air in the cabinet to the outside of the cabinet to keep the inside of the cabinet at a certain temperature and ensure the reliable operation of the equipment. [0003] The sele...

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Problems solved by technology

[0003] The selection of heat exchangers and the detection of heat exchange capacity are mainly carried out in combination with the data provided by the manufacturer and thermal simulation. At present, the test equipment used by the supplier takes up a lot of space, the test method is complicated, and the test takes a long time. Poor operability

Therefore, some simple test devices made of materials such as paper shells or plexiglass are used for detection, but this simple test device also has the following disadvantages: (1) The temporary test device built during the test is often aimed at a certain For a heat exchanger with a specific specification, when the external dimensions of the heat exchanger change, it needs to be rebuilt, which consumes resources and has poor flexibility; (2) There are fewer temperature detection points selected, and the temperature data of different temperature detection points are different , so the reliability of the collected temperature data is poor, and the collection of temperature data is carried out in different import and export sequences of the internal and external circulation of the heat exchanger, resulting in asynchronous collection of data and poor accuracy; (3) The shape of the air circulation channel of the simple test device is random Large, equipped with an axial flow fan, eddy currents are generated, resulting in a large temperature difference in the same cross-section of the heated internal circulating air. In addition, in the simple test device, the wind speed is often used to roughly calculate the size of the air volume, and the air volume The size is closely related to temperature and pressure, which will lead to the inability to correctly control the air volume of the internal and external circulation, resulting in large errors in the final test data and poor reliability; (4) The material used in the simple test device has poor thermal insulation, and the internal and external circulation fans The change of rotation speed will affect the heat dissipation of the circulation channel, which makes it difficult to achieve stable control of the air temperature in the inner circulation

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