KLEOS, Beirut (Lebanon)

KLEOS Achrafieh Apartments is developed by Hayek Group. It is a multi-story building that aims to provide luxurious family residences. It includes apartments of different sizes and some other amenities, such as a fitness center and swimming pool.The project is located near downtown Beirut. The project team endeavors to make the tower more energy efficient than the standard new construction in Beirut.

The project aims to create multiapartment building with facilities and amenities. The developers will be responsible for the operation of the building. Therefore, there is a high interest in implementing EE measures. Its target groups are middle and upper middle class. The project is composed of Multiapartment buildings with several amenities and facilities. It is a one building consisting of 19 floors and a penthouse. This is in total is 15,000 sqm where 5,000 sqm underground area.

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 585 Euro/m² and with that higher than the proposed design cost which are calculated as 352 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 47%).

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 a higher efficient cooling/heating supply and the use of renewable energy sources in terms of PV (for electricity). This leads to energy savings and emission reduction.

After the exchange with the project developer, the following components have been assessed as feasible and will be taken into account in the further planning (also illustrated in the table below marked in bold as shown in Figure 3):

• Improvement of the building envelope
• Solar Glazing
• Higher efficient VRF system
• PV on the roof

The suggested measures of the selected package and the optimized lead to a significant decrease in energy demand and cost savings as shown in Figure 4. The energy savings of the selected package are around 62 % compared with the baseline (BaU), while in terms of global costs savings reach 51% for the selected package can be stated.