Methods of estimating monthly cooling loads in buildings are usually confined to sensible demands only, with latent loads either ignored or added as an arbitrary proportion of sensible cooling demands. This note describes an extension of an existing monthly method for estimating sensible cooling demands that takes account of latent cooling. It reflects the effects of climate, ventilation rate and indoor moisture gains and also of some less widely appreciated impacts of system design. These are illustrated by an example typifying UK office conditions. In order to be workable, the methodology contains a number of simplifications, where precise estimates are needed, and more sophisticated methods should be used.

Practical application: Estimates of annual cooling energy demand made with existing monthly procedures do not account for the size of latent cooling loads or the ways these vary between different forms of air conditioning systems. This note shows how this can be done though, where this is a critical design parameter more complex methods are recommended.

估计建筑物中每月制冷负荷的方法通常只限于合理的需求，而潜在负荷则可以忽略不计，也可以作为显着制冷需求的任意比例添加。本说明描述了一种现有的每月方法的扩展，该方法用于评估合理的制冷需求，其中考虑了潜在的制冷。它反映了气候，通风速率和室内湿度增加的影响，还反映了系统设计的一些未被广泛接受的影响。这些是典型的英国办公条件示例。为了可行，该方法包含许多简化，需要精确的估计，并且应使用更复杂的方法。

实际应用：用现有的每月程序估算的年度冷却能源需求不考虑潜在的冷却负荷的大小或这些因素在不同形式的空调系统之间的变化方式。本说明显示了如何完成此操作，在这是关键设计参数的情况下，建议使用更复杂的方法。