3.2.2 The SEED model

Figure 3.2 Archetypes and SEED Model Source: Author

These models are in energy plus input files ‘*idf’ file format which consists of the thermal properties associated with each era and other set environmental parameters. They vary based on their thermal efficiencies and shapes. Average Window Wall Ratio (WWR) was calculated for each archetype. Each of the 5 archetypes consists of 2 files a) ‘Single block’ and b) ‘Multi’. The ‘Single block’ files represent the building stocks that have single school block within the entire premise, whereas the ‘multi-block’ files consist of more than a single building.

3.2.2 The SEED model

They are further categorized into ‘seed’ models (fig 3.2) which is a typical school classroom model with 4 different geometric orientations, North to South, East to West. These ‘seed’ classrooms are 6.5 x 8.0 m in length and breadth and 3.5m in height. These models consisted of inputs on the schedules, thermostat, internal gains, and ventilation but the model did not have specific window locations and building site location. Table 3.2 a 3.2b gives the typical building fabric characteristics and thermal modelling inputs used.

The archetypes are modelled using a stand-alone energy simulation program- Energy plus, which is widely used by researchers and designers.

Table 3.2 a Model inputs – Building fabric characteristics

Interior wall Interior ceiling Interior floor Single glazed window Curtains

Plasterboard Timber flooring Plaster Glass pan 6mm Glass pan 6mm XPS 70mm XPS 70mm XPS 70mm Drapes 0.004 Plasterboard Plaster Timber flooring