Zero Energy Building_Markhor.pptx

7/29/2019 Zero Energy Building_Markhor.pptx

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Zero Energy Building (ZEB):A building with zero net energy consumptionand zero carbon emissions annually.


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ZEB produces enough energy torun itself, without the need to tap on

power supply from the grid.


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To achieve energy self sufficiency,the ZEB is powered by a broad spectrum of solar

panels installed at many locations in the building.


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Photovoltaicsare best known as a method forgenerating electric power by using solar cells to

convert energy from the sun into electricity


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1st in South-east Asia retrofitted from an

existing building

Serve as a test bed for integration of GreenBuilding Technologies in existing buildings

Singapores Zero Energy Building


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Through a combination of Green building technology,

Clever building design that takes advantages

of natural ventilation and lighting (passivedesign),

Harnessing of solar energy

A total saving of $84,000in energy cost annually.


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How can we achieve zero energy?

Generally Built with significant energy-saving

features

Singapores ZEB

1. Building offices with an integrated design

that reduce energy consumption

2. Natural daylighting and ventilation systems


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ZEB Offices 3 general principles to reduce energyconsumption

Passive designs (e.g. light pipes, light shelves)

Active solutions (e.g. personalized ventilation,

displacement cooling)

Active controls (e.g. motion sensors, daylight

sensors)

Example: daylight sensors

Detect sufficient daylight automatic

reduction of artificial lighting optimize energy

usage


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Natural Daylighting and Ventilation Systems Built in devices such as light pipes and light

shelves

Example: light shelves

Highly reflective surfaces that reflect daylightdeep into space

Help to reduce the use of artificial lighting at

daytime reduce energy consumption


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Achieving Zero Energy (Other General Methods) Nighttime illumination done with fluorescent

lighting and LED lighting

Uses 1/3 or less power than incandescent

lights, without adding unwanted heat

Utilise efficient appliances to lessen

miscellaneous electric loads


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Enhancing the water efficiency of a building Water Efficient Fittings

Water Efficient Flushing System

Dual flush low capacity flushing cisterns should be used

Urinal flush valves that use not more than 0.5 litres of water per

flush should be used

Water Efficient Fixtures

Install self-closing delayed action taps at all wash basins

Water Efficiency Labels

Use water fittings with Water Efficiency Labels


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Water Efficient Landscaping Water Efficient Plants

Use drought resistant plants or plants that fit naturally into the

existing climatic conditions

Limit amount of turf area

Irrigation

Recycled water, NEWater or rainwater should be used for

irrigation

Water Efficient Irrigation System

Irrigation system should be zoned Water efficient irrigation system such as drip irrigation system

should be used

Automatic controller and rain sensors should be incorporated

Enhancing the water efficiency of a building


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Drip irrigation system uses 30% to 50%

less water than sprinkler irrigation

Achieve savings of 35% of water a year

with the incorporation of rain sensors



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Metering & Accounting Sub-meters should be installed on all major water

systems

By monitoring water usage, water saving opportunities can be

identified

Main and sub-meters should be linked to a building

management system (BMS)



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Cooling Tower Water Consumption NEWater should be used for cooling tower make-up water

Condensate water from AHUs or FCUs could also be

used



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Cooling Tower Water Consumption Better Cycles Of Concentration

Higher concentration cycles reduce make-up and blow-down

water requirements and hence reduce the cost of operation

Efficient Drift Eliminators

Control unnecessary loss of water and help reduce the

nuisance of water spraying near the tower


Documents

Zero Energy Building_Markhor.pptx