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Falling-film as natural cooling technique: Modelling and energy impact assessment

机译：落叶作为天然冷却技术：建模和能量影响评估

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Although the cooling energy consumption is expected to decrease with the use of natural cooling techniques, their incorporation into the building sector remains very limited in most countries of the European Union and non-existent in others. This is largely due to a lack of information about the techniques and tools that enable the different design options to be assessed quickly and without high computational costs. For this reason, this study develops a simplified characterization model of the falling water film system since there is a lack of available information about it. This makes it possible to assess the system's potential in a variety of operating conditions or climate zones and to evaluate it as an alternative or complement to conventional air conditioning systems. This model has been obtained and validated with data provided by assessing an experimental prototype of the system. This simplified characterization model allows the Transient System Simulation Tool to assess the energy impact resulting from the use of falling water film technology to supply cold water to an air treatment unit through a thermal energy storage system. The energy impact was assessed for different kinds of single-family homes and in the two most extreme climate zones regarding cooling. The results show that this natural heat dissipation system is capable of satisfying up to approximately 90% of the demand for the different kinds of homes and climate zones studied. The maximum percentage of the demand satisfied can be obtained with different storage tank volumes and dissipation areas. Thus, when studying how to incorporate this natural cooling technique, it is necessary to analyse the optimal energy and financial cost of the range of design options according to the case in question. Finally, thanks to the set of simulations carried out, it has been possible to define the concept of the utilization factor, which will allow for the easy evaluation, without the need for detailed simulations, of how the system can be incorporated into buildings in future studies of climate applicability.
机译：虽然预计使用自然冷却技术的冷却能耗预计会降低，但在欧盟大多数国家的大多数国家和其他人中，他们的纳入建筑业仍然非常有限。这主要是由于缺乏有关能够快速和没有高计算成本进行评估的技术和工具的信息。因此，本研究开发了下降水膜系统的简化表征模型，因为缺乏有关它的可用信息。这使得可以评估系统在各种操作条件或气候区中的​​潜力，并将其评估为传统空调系统的替代或补充。已经获得该模型并通过评估系统的实验原型提供的数据来验证。这种简化的表征模型允许瞬态系统仿真工具评估利用下降水膜技术产生的能量冲击，通过热能储存系统将冷水供应到空气处理单元。对不同种类的单家族家庭和关于冷却的两个最极端气候区评估了能量影响。结果表明，这种天然散热系统能够满足所研究的不同种类和气候区需求的大约90％。通过不同的储罐卷和耗散区域可以获得需求满足的最大百分比。因此，在研究如何掺入这种自然冷却技术时，有必要根据有问题的情况分析设计选项范围的最佳能量和财务成本。最后，由于进行了一组模拟，已经可以定义利用率的概念，这将允许简单的评估，而无需详细仿真，如何将系统结合到未来建筑物中气候适用性研究。

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