高压喷气—填料蒸发冷却空调机组用于空压站的实验研究

发布时间：2018-04-09 19:54

  本文选题：高压喷气　切入点：填料　出处：《西安工程大学》2013年硕士论文

【摘要】：随着纺织工艺的不断改革发展，如何降低纺织空调能耗，提高能源的利用率是纺织企业特别关注的问题。而对于纺织车间空调区的主要特点是：以机器散发的显热为主，与舒适性空调的最大区别是车间纺织工艺对湿度场的要求精度比较高。车间纺织机器几乎全年连续运行，因此在冬季的不仅需要对车间加湿而且还要对其降温。纺织厂经常采用的喷水室、喷雾风机和高压喷雾，一般需另设冷冻站或开采深井水作为空调的水源，导致了占地面积大，初投资高，耗水量大，能耗高等缺点。为了解决这些问题，提出将纺织厂通用压缩空气与直接蒸发冷却相结合处理室外新风的空调机组。我校与西安井上人工环境有限公司合作设计制作了这种能够循环利用能源，且具有节能、环保、经济、健康的高压喷气—填料蒸发冷却空调机组，并实际应用到了纺织厂空压站中，不仅对该机组进行了可行性分析，还对该机组在实际工程中进行了测试研究。 首先结合理论分析对该空调机组进行可行性分析，并从其结构特征、工作原理及空气处理过程进行了分析。在实用新型专利高压喷气—填料式直接蒸发冷却器复合型蒸发冷却空调机组上，对设计风量是5000m3/h空调机组采用高压节气喷嘴的高压喷气段、填料段进行结构上设计及设备选型。 然后对应用于纺织厂空压站的设计风量是5000m3/h的实验样机进行测试。分别采用单独开启填料直接蒸发冷却段与同时开启高压喷气段和填料直接蒸发冷却段的两种模式进行对比测试。其中高压喷气段的喷射方式分为：顺喷，侧喷，逆喷。测试结果表明：（1）高压喷气段使得室外新风的干球温度平均降低0.89℃，湿球温度平均降低1.12℃，含湿量平均降低1.56g/kg，得出压缩空气是一种气体吸湿剂。（2）开启高压喷气段后可以使得直接蒸发冷却段的温降和冷却效率都有所提升，直接蒸发冷却段的平均温降从4.54℃提升到5.67℃，冷却效率从83.46%提高到93.68%。（3）高压喷气在三种不同的喷射方式中，逆喷与填料直接蒸发冷却相结合时，冷却效果好于顺喷和侧喷。根据该空调机组自身的特点，，对其适用场合提出些许意见。 最后以纺织厂织布车间为计算依据，分析该机组相比于传统喷水室的节能潜力。分别对传统喷水室、高压喷气—填料蒸发冷却空调系统进行制冷量、能耗、能效比EER的计算，然后进行对比分析。经计算知，传统喷水室的制冷量仅是高压喷气—直接蒸发冷却空调制冷量的31.6%。且高压喷气—直接蒸发冷却空调的能效比是2.67，传统喷水室的能效比是2.07。可见，在纺织厂采用高压喷气—直接蒸发冷却空调较传统喷水室较经济。
[Abstract]:With the continuous reform and development of textile technology, how to reduce energy consumption of textile air conditioning and improve energy utilization rate is a special concern of textile enterprises.The main characteristic of the air conditioning area of textile workshop is that the heat emitted by the machine is the main factor, and the biggest difference from the comfortable air conditioning is that the precision of the humidity field of the textile process in the workshop is relatively high.Workshop textile machines run continuously throughout the year, so it is necessary not only to humidify the workshop in winter, but also to cool it down.The water spray chamber, spray fan and high pressure spray often used in textile mills usually need to set up freezing station or mining deep well water as air conditioning water source, which leads to the shortcomings of large land area, high initial investment, large water consumption, high energy consumption and so on.In order to solve these problems, an air conditioning unit which combines general compressed air in textile mill with direct evaporative cooling to treat outdoor fresh air is put forward.Our school and Xi'an Jingshang artificial Environment Co., Ltd. have designed and manufactured this kind of high-pressure air-jet and packing evaporative cooling air conditioning unit with energy saving, environmental protection, economy and health.And it is applied to the air pressure station of textile mill. Not only the feasibility analysis of the unit is carried out, but also the testing research of the unit in the actual project is carried out.Firstly, the feasibility of the air conditioning unit is analyzed based on the theoretical analysis, and the structural characteristics, working principle and air treatment process are analyzed.In the utility model patent high pressure jet packing type direct evaporative cooler composite evaporative cooling air-conditioning unit the design air volume is 5000m3/h air conditioning unit using high pressure throttle nozzle high pressure jet section packing section structure design and equipment selection.Then test the experimental prototype of 5000m3/h, which is applied to the air pressure station of textile mill.The direct evaporative cooling section of packing was opened separately and the high pressure jet section and the direct evaporative cooling section of packing were opened at the same time.The injection mode of high pressure jet section can be divided into three types: side jet, side jet and reverse jet.The test results show that the dry and wet bulb temperatures of outdoor fresh air and wet bulb are reduced by 0.89 鈩

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