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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Plasma hydrophilic surface treatment for dehumidifying heat exchangers
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Plasma hydrophilic surface treatment for dehumidifying heat exchangers

机译：用于换热器的等离子亲水表面处理

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This paper describes a method using plasma gas to form a hydrophilic surface on fin stock for dehumidifying finned-tube heat exchangers. The heat exchangers (with and without the plasma treatment) were subjected to 1000 wet/dry cycles and the contact angle was measured as a function of cycling time. The heat transfer and pressure drop characteristics of these heat exchangers were then measured in a wind tunnel after each 250 wet/dry cycles. Data was taken for dry and wet surface (de-humidification) heat transfer on both untreated and treated surface heat exchangers. After 1000 wet/dry cycles, the wet surface pressure drop on the plasma treated surface was 30% greater than the dry surface value, as opposed to a 100% pressure drop increase for the untreated surface heat exchanger. This data shows that the plasma treatment provides long-term pressure drop reduction. For fixed air frontal velocity, the plasma treated and untreated heat exchangers give practically the same air-side heat transfer coefficient. However, the plasma treated heat exchanger yields 25% lower air pressure drop than the untreated heat exchangers for the fully wet condition. Hence, at fixed frontal velocity, the plasma treated heat exchanger will require less fan power for the same cooling duty and will result in reduced fan noise. (C) 2002 Elsevier Science Inc. All rights reserved. [References: 10]
机译：本文介绍了一种使用等离子气体在翅片料上形成亲水表面以对翅片管热交换器进行除湿的方法。使热交换器（经过和不经过等离子体处理）经受1000次干/湿循环，并且测量接触角作为循环时间的函数。然后，在每250个干/湿循环后，在风洞中测量这些热交换器的传热和压降特性。在未经处理和经过处理的表面热交换器上获取干燥和潮湿表面（除湿）传热的数据。经过1000次干/湿循环后，经过等离子体处理的表面上的湿表面压降比干表面值大30％，而未经处理的表面热交换器的压降增加了100％。该数据表明等离子处理可长期降低压降。对于固定的空气前沿速度，经过等离子体处理的和未经处理的热交换器给出的空气侧传热系数几乎相同。但是，在完全湿润的条件下，经过等离子处理的热交换器的气压降比未处理的热交换器低25％。因此，在固定的正面速度下，经过等离子处理的换热器对于相同的冷却负荷将需要较少的风扇功率，并会降低风扇的噪音。 （C）2002 Elsevier Science Inc.保留所有权利。 [参考：10]

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