夏季独立新风系统在工艺空调中的应用
Application of independent outdoor air system to process air conditioning in summer
摘要：
工艺空调需要同时控制空气温度和湿度，控制精度要求高、能耗大。独立新风系统在热湿比较大的工艺厂房具有良好适用性。本文研究了3种不同的独立新风系统，即分体串联独立新风系统、一体独立新风系统和一体混风除湿独立新风系统的工程应用形式，对每种系统的运行原理进行了分析，并对其实际运行效果进行了实测。结果表明：3种独立新风系统在保留传统独立新风系统优点的基础上，通过流程改进实现了系统复杂度降低、过渡季性能提升和对低热湿比的适应性提高；相比一次回风系统，分体串联独立新风系统在贵定县制冷季一次能源节能率达64.8%，一体独立新风系统在遵义市制冷季一次能源节能率达25.2%，一体混风除湿独立新风系统在铜仁市制冷季一次能源节能率达45.2%。
Abstract：
Process air conditioning needs to control air temperature and humidity at the same time, with high control accuracy and high energy consumption. The independent outdoor air system has good applicability in the process plant with large heat humidity ratio. This paper studies the engineering application forms of three different independent outdoor air systems, including split series independent outdoor air system, integrated independent outdoor air system and integrated air mixing and dehumidification independent outdoor air system, analyses the operation principle of each system, and measures its actual operation effect. The results show that the three independent outdoor air systems have realized the reduction of system complexity, the improvement of performance in transition season and the improvement of adaptability to low heat humidity ratio condition through process improvement on the basis of inheriting the advantages of traditional independent outdoor air system. Compared with the primary return air system, the primary energy consumption of the split series independent outdoor air system in Guiding county in the cooling season reduces by 64.8%, that of the integrated independent outdoor air system in Zunyi city in the cooling season reduces by 25.2%, and that of the integrated air mixing and dehumidification independent outdoor air system in Tongren city in the cooling season reduces by 45.2%.
Keywords:independent outdoor air system; cooling season; process air conditioning; humidification; dehumidification; heat humidity ratio; energy saving