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在改造后的风管式焓差法试验台上对样机进行了热工性能试验。试验分两个阶段:将喷淋水温度设定为进口空气湿球温度,试验研究不同空气流速和水汽比对阻力和效率的影响,得出最佳空气流速和水汽比;在此基础上测试喷淋水温度对水蒸发冷却器效率的影响。试验数据的整理与分析结果表明,最佳迎面空气流速为1.0m/s,最佳水汽比为0.1,蒸发冷却效率和显热制冷量随着喷淋水温度的升高而降低。根据冷气机制冷量实测值不低于明示值95%的规定,经计算得出,喷淋水温度的波动范围为20.13～25.86℃。
In the modified duct enthalpy difference test bench on the prototype thermal performance test. The test is divided into two stages: the temperature of the spray water is set as the inlet air wet-bulb temperature, the effect of different air velocity and water-vapor ratio on the resistance and efficiency is tested to obtain the optimum air flow rate and water vapor ratio; on this basis, the test Effect of Spraying Water Temperature on Evaporative Cooler Efficiency. The results of the test and analysis show that the optimum air flow rate is 1.0m / s and the optimum water vapor ratio is 0.1. The evaporative cooling efficiency and sensible heat capacity decrease with the increase of the temperature of the spray water. According to the air-conditioning refrigeration measured value of not less than the express value of 95% of the provisions of the calculation, the spray water temperature fluctuations range of 20.13 ~ 25.86 ℃.