Sin El Fil, Lebanon

ACE Headquarters

As one of Middle East’s leading consulting design engineers, ACE has taken on the challenge of constructing a LEED accredited building, leading the way by example to demonstrate its commitment to save and protect the environment and provide its occupants with health and comfort. ACE has committed to creating a green building for our HQ in support of maximizing efficiency, productivity, and comfort of all the occupants. The ACE Headquarters is a commercial type building for office use located in Sin El Fil, Cardinal El Sayegh Street, Lebanon. The building was designed to achieve LEED Gold certification using the latest technologies in Power reduction, Solar Energy usage, and utility savings.

Description

LED lighting was used all over the project to achieve effective task lighting where needed as well as general lighting with minimal power usage. The lighting is controlled by the multi-zone occupancy sensors along with a freely adjustable desk lamp (task lighting) to enable the occupants to adjust the lighting to meet their needs as recommended by LEED credit IEQc6.1. The building was optimized to use natural lighting during most hours of the day. Cooling and heating of the project spaces were optimized using energy-efficient equipment, thermostat controls, and adequate ventilation. Hot water pre-heat is done via roof-mounted solar panels. Solar Energy was used to provide power supply for the building data center. The solar photovoltaic system supplies a given load of around 8 KW and net meter the rest of the energy back to the grid in a hybrid grid connect/stand-alone system. The photovoltaic system promotes sustainable development and will reduce pollution. All fans and pump motors are provided with variable frequency/speed-driven inverters closely matching the demand. In addition, all the associated ductwork and pipework have been oversized in accordance with ASHRAE to reduce the friction losses. All the cooling plants have been configured to serve dedicated zones with individual controls. ACE's new building has been designed with a green roof on top as well as some solar water heaters; this means that not the whole roof area can be utilized for photovoltaic panels. The roof design was optimized so that up to 18.48 KW of photovoltaic energy can be installed on the building roof. State of the art PV panels was chosen for the application. Each panel gives around 140 Watts and has an area of 1 m2. Inclination angle and shading factors have been taken into effect in order to maximize efficiency. Multiple ECMs were implemented during the design phase of the project. The building automation The system will monitor and control individual spaces to determine when each strategy is implemented as well as provide performance feedback. Operation parameters of ECMs will notify/alarm building operators of conditions that may adversely affect energy savings performance. In addition, each floor will be metered and monitored for electricity, water, and environmental parameters for the benefit of appropriateness, rigor, and repeatability in accordance with (IPMVP). Each floor shall be provided with electric meters, continuously metering the usage on each floor.

Project info

Construction phase
New construction
Building type
Non-residential building
Detailed building type
Office
Net floor area
5384.82 m2
Land plot size
20882 m2
Stories
7 stories
Construction type
Mixed construction
Original construction year of the building
2012
Project contact
Elie Safi
Contact email address
elie.safi@ace-intl.com

Project team

Developer(s)/owner(s)
ACE/Mr. Hani Hakim
Architect(s)
Elie Safi
Construction contractor(s)
Jesco for Concrete, Bifem Paralu for curtain walls, Elcir for wood, Carlisle for Water proofing systems, Mitsulift for conveying systems and ACE for remaining works.
Energy efficiency consultant(s)
ACE
HVAC consultant(s)
Khater Engineering
Building services
Offices for engineering firm and related amenities

Building Rating and Certifications systems

Rating and certifications systems
LEED

Building Envelope

External walls

Description of construction
Concrete walls - Steel Framed, 300mm thickness, Absorptivity: 0.675.
U-Value
1.945 W/(m²*K)

Roof

Roof type
Concrete ceiling with hollow blocks
Description of construction
Total 475mm thick. HW concrete 360mm, Cement Plaster 10mm, Vapor barrier 5mm, Polyiso insulation 40mm, and top tiles 40mm. Absorptivity: 0.7
U-Value
0.458 W/(m²*K)

Openings and windows

Glazing type
Double glazed
U-Value glass
1.9 W/(m²*K)
G-Value glass
0.3
Frame material / description
Aluminum frame
U-Value frame
2.77 W/(m²*K)
Overall u-value window
2.37 W/(m²*K)
Description of construction
Concealed structure Aluminum curtain wall system.

Basement floor

Description of construction
Concrete retaining peripheral walls 300mm thick with epoxy paint over exposed concrete and low VOC paint over fairface concrete wall finish.
U-Value
1.611 W/(m²*K)

Technical Building Systems

Ventilation system

Type of ventilation
Fans
Description
Roof Exhaust fans for restrooms and Mechanical ventillation for Basements
Manufacturer(s) / products
Systemair / Parking fans, Fresh air fans for technical rooms in basements, Exhaust fans for restrooms.

Space cooling system

Primary space cooling system
VRV System / FAHU+CU
Description
VRV System / FAHU+CU cooling systems for open space offices, offices and general areas.
Manufacturer(s) / products
Hitachi/ VRV system and CIAT, Lenox for FAHU+CU
Secondary space cooling system
Mounted single-split or window air conditioner│Usually a visible smaller system mounted outside the wall or above the window just supplying one room
Description
mini Split units cooling for technical rooms (UPS room, Battery room, Server Room)
Manufacturer(s) / products
McQuay/ Split units

Space heating system

Primary Space heating system
District heating
Description
VRV System / FAHU+CU heating systems for open space offices, offices and general areas.
Manufacturer(s) / products
Hitachi/ VRV system and CIAT, Lenox for FAHU+CU

Water heater system

Primary water heater system
Solar Thermal collector on the roof
Description
Vacuum tube solar system
Manufacturer(s) / products
SunRain/ Vacuum tube solar system
Secondary water heater system
Dedicated electric heater (dedicated = just hot water generation)
Description
6KW Electrical boiler.
Manufacturer(s) / products
ELBI / Electrical boiler

Lighting system

Primary lighting system
LED (Light emitting diode lamps)
Description
LED lighting downlights for general and office spaces lighting.
Manufacturer(s) / products
Zumtobel / LED fixtures.
Secondary lighting system
LED (Light emitting diode lamps)
Description
LED desk lighting fixtures for each office. LED lighting 3.2W consumption each.
Manufacturer(s) / products
PAN/ Desk Light 3.2W LED. Ref. TAV30024

Shading devices

Type of shading system installed
Manual systems (e.g. roller shutters, folding shutters, external blinds)
Description
Sun Shade curtains

Photovoltaics

Capacity
18.48 kWp
Total module area
1322 m²
Description
"The solar photovoltaic system the new building in Sin El Fil supplies a given load of around 8 KW and net meter the rest of the energy back to the grid in a hybrid grid connect/stand alone system. The photovoltaic system promotes sustainable development and reduce pollution. ACEs new building in Sin El Fil has a green roof on top as well as some solar water heaters; this means that not the whole roof area can be utilized for photovoltaic panels. 18.48 KW of photovoltaic energy has been installed on the buildings roof. The PV panel used gives around 140 Watts and has an area of 1 m2. Inclination angle and shading factors have been taken into effect in order to maximize efficiency."
Manufacturer(s) / products
Mideast Power Systems (MPS)/ Solar Photovoltaic System

Final Energy Demand

Energy carrier (1)
Electricity
Annual heating demand
6.35 kWh/(m²*a)
Annual cooling demand
15.87 kWh/(m²*a)
Annual lighting demand
26.1 kWh/(m²*a)
Annual hot water demand
0.96 kWh/(m²*a)
Total final energy demand
92.33 kWh/(m²*a)

Financial Aspects

Project construction cost
6535982 EUR
Estimated costs of energy efficiency and renewable energy measures
653596 EUR
Certification costs
15000 EUR
Financing sources
Loan
Financing/funding institution
IBL Bank