This document presents the case study on EN ISO 52016-1:2017, Energy performance of buildings — Energy needs for heating and cooling, internal temperatures and sensible and latent heat loads — Part 1: Calculation procedures.

The case study makes use of the spreadsheet tool that has been developed to demonstrate the calculation procedures and to perform example calculations.

One of the aims of the study is to show that the choice for hourly instead of monthly calculation procedures (both are covered in EN ISO 52016-1 and in the spreadsheet) does not require extra input data. On the contrary: the input and procedures (e.g. on the control of solar blinds, on the impact of undersized systems, on intermittent heating) is much more straightforward and the output is richer: e.g. includes a score on thermal comfort.

One of the assets of EN ISO 52016-1 is that it contains both a monthly and an hourly calculation procedure. The hourly calculation procedure has been tailored to ensure that the number of input data that the user needs to gather is kept the same as for the monthly calculation procedures

This case study also shows that the methodology is much more straightforward and transparent in case of hourly calculation procedures. Where the monthly calculation procedures require series of tabulated correction factors for the impact of hourly varying phenomena on the monthly energy balance, the hourly calculation procedures simply use directly the hourly variations in the calculation of the energy balance.

This is the case for the control of solar blinds at different orientations, for the impact of thermal (building) mass, for the impact of undersized systems, for intermittent heating and cooling, solar and internal gains, ventilation (e.g. ventilative cooling), etc.

The link to the Use Profile Generator based on EN 16798-1 has been demonstrated. This link is important, because it contributes to the overall consistency and transparency of the calculations.

 

More details on the calculation methodology and the impact it has on various building types, either residential or corporate, can be found in the full document, which can be accessed at the link below:

Report to Case Study on EN ISO 52016-1 – Heating and cooling needs and internal temperatures