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Saturday, August 3, 2019

Ventilation For Buildings — Calculation of room temperatures and of load and energy for buildings with room conditioning systems

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Description

Chapters 13 and 14 of this standard deal with the calculation of the energy demand of HVAC systems, specifically in connection with the Energy Performance Rating in connection with the Energy Performance of Buildings Directive. The calculation of the building energy demand that has to be met is dealt with in prEN ISO 13790:2005 "Thermal Performance of Buildings – Calculation of energy use for space heating and cooling" – this information is input data for the procedures addressed in this standard. Calculation methods satisfying this standard may also be used for other purposes, (for example, for system sizing). These are covered by chapters 1 to 12 of the standard. Users of calculation methods should exercise care in ensuring that the need for appropriate modifications are considered and, if necessary, implemented for other applications.

The standard has an unusual large portion of informative annexes in terms of number and size. This is due to the fact that the area covered by this standard is highly dependent on the system solutions, which exist in a large number of variations, and therefore many issues can only be shown in an exemplary way and experts in the different countries would not agree in putting this generally in normative way. Also, due to the different approaches taken in the different countries for the implementation of the EPBD, different solutions must be possible in parallel and the normative part can only be general. Nevertheless, the standard intends to give room for documentation of specific solutions, in order to provide information in enough depth, to make common parts and difference transparent for possible closer harmonisation in future.

Content:-

1.Scope

2. Normative references

3. Terms and definitions

4. Symbols and abbreviations

5. General approach

6. Room temperature calculation without room conditioning system

7. Room cooling load calculation

8. Room heating load calculation

9. Room based equipment sizing

10. Zone load calculation

11. System heating and cooling load calculation