This project is a mixed-use building developed by Emirates Realestate in Cairo. The gross floor area of the building is approximately 500 square meters. The project is under construction and the BUILD_ME team's support will focus on energy efficiency solutions for the building envelope and HVAC systems.
The project aims to create a multifamily house that provides residents with the high levels of thermal comfort and provide an example of the energy efficient buildings in Egypt. Its target group is upper middle-class families living in Greater Cairo. The building is composed of a diverse range of residential units that will be offered for both sale and rental. The total area is around 1,200 sqm on 6 floors. The building has 15 housing units with total number of around 60 occupants/users.
Baseline vs current situation
Comparing the baseline which represents the business as usual for the specific building type in the given country with the current planning details provided by the project developer as shown in Figure 1, it can be stated that:
- The global cost of the BAU construction of such a building are around 198 Euro/m² and with that higher than the proposed design cost which are calculated as 119 Euro/m². That is equal with global cost savings of 40%.
- Furthermore, the proposed design is more energy efficient in comparison to the BAU cases (final energy savings of 45%).
The analysis of the cost optimal energy efficiency and renewable energy measures have resulted in the following key components illustrated in the table below as shown in Figure 2. It shows that the building envelope is significantly enhanced compared to the business as usual and current plan. Special attention is given to highly efficient cooling supply and the use of solar energy to generate electricity (PV). This leads to energy savings and emission reduction.
The suggested measures of the optimized case lead to a significant decrease in energy demand and cost savings as shown in Figure 3. The energy savings are about 76 % compared with the baseline (BaU), while global costs savings reach 69% for the optimized solution.