In this work, a novel building cooling system is proposed, namely DAV-cooling system, which integrates dew point evaporative cooling, air-carrying energy radiant air conditioning and vacuum membrane-based dehumidification. The DAV-cooling system does not use any organic refrigerants, and can naturally provide fresh air indoors to prevent managers from arbitrarily reducing fresh air, and can be flexibly adjusted to meet different cooling requirements. In addition, the thermodynamic model of the DAV-cooling system is established, and some systematical analysis of parameters of the DAV-cooling system is carried out. The results indicate that there is an optimal ratio of fresh air to primary air for the DAV-cooling system, and the optimal value of this ratio should be in the range of 0.2–0.4. When the DAV-cooling system operates under the condition of a higher flow of primary air, the requirements for the dehumidification efficiency of the vacuum membrane-based dehumidification device can be reduced. Moreover, the relationship between COP and cooling capacity ratio is revealed, and it is found that COP decreases as the cooling capacity ratio increases, but they are not in an absolutely one-to-one relationship. Outdoor temperature and humidity also have a greater impact on the performance of the DAV-cooling system. For Singapore and Changsha in the period from June to August, the COP of the DAV-cooling system is about 5–7 and 4.5–9 respectively when the permeate side pressure is 20 kPa. Finally, the engineering design methods of the DAV-cooling system are discussed, and it is found that the DAV-cooling system can be designed as a temperature and humidity independent control air conditioning system through the proposed design method and the established model. This work can provide a complete solution reference and some new insights for the application of next-generation HVAC systems.

在这项工作中，提出了一种新型的建筑冷却系统，即 DAV 冷却系统，它集成了露点蒸发冷却、载气辐射空调和真空膜除湿。DAV-制冷系统不使用任何有机制冷剂，可自然提供室内新风，防止管理人员随意减少新风，并可灵活调节，满足不同制冷需求。此外，建立了DAV-冷却系统的热力学模型，并对DAV-冷却系统的参数进行了一些系统的分析。结果表明，DAV-冷却系统存在一个最佳新风与一次风比例，该比例的最佳值应在0.2-0.4范围内。当DAV-冷却系统在较高一次风流量的条件下运行时，可以降低对真空膜式除湿装置除湿效率的要求。此外，还揭示了COP与冷量比之间的关系，发现COP随着冷量比的增加而降低，但它们并不是绝对一一对应的关系。室外温度和湿度对 DAV 冷却系统的性能也有较大影响。对于新加坡和长沙，6-8 月，DAV 冷却系统在产水侧压力为 20 kPa 时的 COP 分别约为 5-7 和 4.5-9。最后讨论了DAV冷却系统的工程设计方法，结果表明，通过提出的设计方法和建立的模型，可以将DAV-冷却系统设计为温湿度独立控制的空调系统。这项工作可以为下一代暖通空调系统的应用提供完整的解决方案参考和一些新的见解。