This paper presents the results of experimental research on radiator batteries for cooling oil immersed power transformers. A special test setup was built, consisting of a tank and heaters, simulating the active part of the transformer, and a radiator bank, with the pump in the pipe connecting the tank and the radiators. Fans were mounted below (vertical blowing) and on the side (horizontal blowing). The main parameters measured include temperatures, oil flow, and pressures in characteristic positions. The motivation behind the experimental research lies in the somewhat higher discrepancy between oil flows through the radiators calculated using detailed thermal-hydraulic model from the results of heat run tests in the case of forced oil flow and the application of the radiators for the outer cooling. Since the calculated oil flows were higher than the values obtained from the heat run test, it was obvious that there are some additional pressure drops along the oil path. The hypothesis is that these pressure drops appear in the top and bottom head of the radiators. Corresponding measurements, analysis, and steps taken to fine tune the detailed thermal-hydraulic model are presented in this paper.

中文翻译：

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油浸式电力变压器散热器电池特性的实验研究

本文介绍了用于冷却油浸式电力变压器的散热器电池的实验研究结果。建立了一个特殊的测试装置，包括一个水箱和加热器，模拟变压器的有源部分，以及一个散热器组，泵位于连接水箱和散热器的管道中。风扇安装在下方（垂直吹风）和侧面（水平吹风）。测量的主要参数包括温度、油流量和特征位置的压力。实验研究背后的动机在于，通过使用详细的热工水力模型计算的通过散热器的油流之间的差异稍大，该模型根据强制油流情况下的热运行测试结果和散热器用于外部冷却的应用。由于计算出的油流量高于从热运​​行测试中获得的值，很明显，沿油路存在一些额外的压降。假设是这些压降出现在散热器的顶部和底部。本文介绍了相应的测量、分析和微调详细热工水力模型所采取的步骤。