Environmental Engineering Reference
In-Depth Information
EP
Overall
EP of
buildings
Overall energy
performance (EP):
Energy performance
of the building
including its technical
building systems
Boundary conditions
FIGURE 7.8
Overall building energy performance indicators.
conditions with energy utilisation. The assessment of the overall energy
performance of a particular building, including the technical building sys-
tems, comprises a number of successive steps, which can be schematically
visualised as a pyramid. Figure 7.8 shows various energy performance indi-
cators of buildings.
7.3.4.3 Status Quo
The relation between the HVAC system design and optimum conditions
and energy utilisation is still under investigation even today. Recent
research [27] has investigated the effect of ventilation design on comfort
and energy. The effect of displacement ventilation on the humidity gradient
in a factory located in a hot and humid region has also been illustrated [27].
It was found that there is a strong dependence relationship between the
correct supplying conditions and comfort. Indeed, displacement ventila-
tion is recommended as an energy-efficient system, because this system
gives the designers the suitable tolerance to select more economical sup-
ply conditions. In recent years, new ventilation system designs, such as
