Untersuchungen zur Intensivierung des Wärmeüberganges und Lüftungskonzepte bei Hochleistungs-Verdunstungskühlung für Gebäude

如果室外空气湿度较低，蒸发空气冷却是获得舒适室内气候的简单方法。与基于卤素的空调不同，基于蒸发冷却的系统是节能的、经济的并且不破坏环境。然而，它们具有某些限制，并且在现有蒸发冷却器的性能方面存在显著的改进范围。这些冷却器可用于建筑物的集中式或分散式冷却布置。在混合通风中，试图尽可能多地利用风和烟囱效应等自然力。但在夏季的某些情况下，额外的冷却是必要的。因此，一个混合的通风策略，必须演变为使用蒸发冷却器来冷却建筑物。在印度鲁尔基的印度理工学院机械与工业工程系制冷与空调实验室，在加热和冷却过程中的传热增强领域进行了过去35年的研究调查。德国德累斯顿工业大学热力学和建筑能源系统研究所在通风和热舒适领域的研究工作也已进行了30多年。将这些经验结合起来，设计一个包括蒸发冷却的混合通风系统，将有助于通过在各种气候条件下保持热舒适来节省能源。

Evaporative air-cooling is an easy way of attaining a comfortable indoor climate provided that outside air humidity is low. Unlike halogen based air-conditioners the evaporative cooling based systems are energy efficient, economical and do not damage the environment. However, they have certain limitations and there is a significant scope of improvement in the performance of existing evaporative coolers. These coolers can be useful for the centralized or decentralized cooling arrangement of the building. In hybrid ventilation it is tried to use natural forces like wind and stack effect as much as possible. But for some situations in the summer period additional cooling is necessary. Therefore, a hybrid ventilation strategy has to be evolved for the use of evaporative coolers to cool the buildings. In the Refrigeration & Air-conditioning Laboratory, Department of Mechanical & Industrial Engineering, Indian Institute of Technology, Roorkee, India, the research investigations have been carried out for the last 35 years in the area of enhancement of heat transfer during heating and cooling processes. Similarly, the research work in the area of ventilation and thermal comfort has been going on in the Institute for Thermodynamics and Building Energy Systems, TU Dresden, Germany for the past 30 years. Bringing together these experiences and designing of a hybrid ventilation system including evaporative cooling will help to save energy by maintaining the thermal comfort for a wide range of climatic conditions.