Sustainable Energy Strategies

Plug Load Efficiency in high efficiency buildings, plug loads may account for more than 50% of the total energy consumption

Energy Star Certified Equipment is advised because it uses less electricity to carry out daily tasks when compared to conventional appliances

Occupancy and Daylight Sensing Controls : The occupancy sensor is capable of detecting motion up to 49 feet (15 meters) away by using Radio Frequency (RF) technology.

The sensor controls the light output to three levels: maximum, dimmed and off

Functions :

• RF occupancy sensitive to at least 50 feet (15 meters)

• Daylight sensor

• Tri-level dimming

• Custom IR remote control to at least 66 feet (20 meters)

• Each sensor controls its own light

• Four preset scenes for ease of programming

Plug Load Efficiency

Low Plug Load Efficiency of 6 46 W/m2 is preferred. which saved up to 3.5 USD/m2/year

Functions :

• Cost Saving

• Variable speed adjusters

Daylighting & Occupancy Controls: building performs better with both daylighting and occupancy control.

A typical air conditioner will utilize most amount of energy in a sharp peak once the unit starts The spike in start up are up to 100 times a day. Compared to highly efficient unit which only few times a day, more energy consumption can be reduced.

• Media filter for better filtration

• Optimal humidity and temperature controls

• Sound reduction

• Continuous blower system

Why use LED Lighting

Use less electricity for the same light output - 85% less electricity when compared to conventional lighting and around 18% less electricity compared to CFL Worldwide, around 20% of electricity is consumed in lighting

HVAC Type: High efficient VAV is used in the optimized scheme which saved up to 2 5USD/m2/year

Light Efficiency: Reduced internal heat gain and power consumption by switching to LED or high efficiency lighting reduces cost to 2 9 USD/m2/year

4. Optimized Scheme Analysis

4.1 Building Energy Comparison

4.2 Daylighting Comparison

4.3 Solar Radiation Comparison

Plug Load Efficiency

Low Plug Load Efficiency of 6.46 W/m2 is preferred which saved up to 3.5 USD/m2/year

4.1 Building Energy Comparison

Daylighting & Occupancy Controls: building performs better with both daylighting and occupancy control

HVAC Type: High efficient VAV is used in the optimized scheme which saved up to 2.5USD/m2/year

4.2 Daylight Comparison

Light Efficiency:

Reduced internal heat gain and power consumption by switching to LED or high efficiency lighting reduces cost to 2.9 USD/m2/year

Glare from the has been eliminated With a slight improvement in

4.2 Daylight Comparison

Daylight Analysis Comparison

4.3 Solar Radiation Comparison

Solar Radiation Comparison

Before Optimize

After Optimized

Before Before After After

Ground floor (Before)

Excessive amount of daylighting coming from the south façade radiating solar heat gain into the lobby

Ground floor (After)

Diffuses from the aluminum vertical façade However still allow sufficient amount of daylighting into the lobby area from the lightwell

1st floor to 4th floor (Before)

Insufficient amount of daylighting for office space during 12p m – 5p m

1st floor to 4th floor (After)

Sufficient amount of daylighting from the lightwell and façade with direct sunlight are covered 1/3 with aluminum horizontal louvres.

All excess solar radiation have been eliminated on the ground floor area. Lesser heat gain on lobby area increase internal thermal comfort level

Overall office spaces show low solar radiation level, which is successfully response to WWR and light shelves installation