ZEMCH 2015 - International Conference Proceedings | Page 469

Table 10: DB3 energy consumption parameters and Passive house requirements. DB3 Heating* Cooling* Energy Annual heating demand (kWh/m2a) Heating load (W/m2) Overall space cooling demand (kWh/m2a) Cooling load (W/m2) Consumption parameters 0 14 14 11 Fulfil Passive house requirements X X Primary Energy Energy reduction (kWh/m2a) through renewables (kWh/m2a) 112 - X *It is enough when only one of the parameters is fulfilled. The DB3 simulation results showed that this model has the potential to fulfil the requirements needed to be considered a Passive House, the only parameter missing is the pressurisation test to check its airtightness. Even though the prototype has achieved the energy efficiency goal, more steps can be made to improve its performance. DB4 simulation The next step consists on implementing renewable energy strategies and consequently reduce the CO2 emissions. During this step the model will be called DB4, the same building parameters will be considered (Figs. 24). Figure 24: DB4 plan, section and renewables specifications. For purpose of this study only PVs are contemplated in this stage. The PV selected are conceived to produce 2,900 Kwh/a, which generate 82.6 Kwh/(m2 a) saving 18.7 kg/(m2 a) of CO2 emissions (Table 11). Table 11: DB4 energy consumption parameters and Passive house requirements. DB4 Heating* Cooling* Energy Annual heating Heating load (W/ Overall space Cooling load (W/ Primary Energy Energy reduction demand m2) cooling demand m2) (kWh/m2a) through (kWh/m2a) (kWh/m2a) renewables (kWh/m2a) Consumption parameters 0 Fulfil Passive house requirements X 14 14 X 11 112 83 X X *It is enough when only one of the parameters is fulfilled. Design decision-making process of affordable low energy homes in Latin America 467