Case of Net Zero Energy Building all over the world
Many are skeptical about the reality of Net Zero Energy Building Design. As such I though it is best to show you the buildings which have achieved the Net Zero Energy Building Design status. This Net Zero Energy Building Design approaches and strategies has become a trend world wide as the movement is catching on quire rapidly. Here there are 5 cases of the strategies adopted world over from Indonesia, Malaysia to the US.
Case 1

Apartment in NY ( read on Apartment in NY )
The Apartment had 48 apartments of an gross area of 53,000-sq-ft
Approaches to Net Zero Energy Designs strategies(The strategies adopted contrived a 90% reduction of consumption of energy);
• wall and roof insulation,
• window glass with low-e coatings and insulated frames,
• shading of building
• Reduction of infiltration through building skin
• Compartmentalization of ventilation spaces provided the best controlled fresh air into the apartment spaces.
• A high-performance air-source heat pump was introduced as a heating plus cooling system.
• One VRF outdoor condensing unit is recommended per apartment
• Domestic hot water included heat recovery from the drain as a pre-heater and recovering the waste heat from the VRF system by using a heat exchanger.
• Improved zone temperature control and substantially reduced energy usage
• Higher-efficiency cooling/heating
• Improved tenant comfort; potential to sub meter heating, cooling, and DHW
• Resiliency (no boiler on the lower floors); and most important, dramatically lower carbon emissions.
• Lighting strategies include low lighting power density (LPD) design solutions while maintaining acceptable levels of illumination. Where applicable, occupancy sensors and bi-level lighting controls are evaluated. The most efficient available appliances are considered for apartments and common areas.
• Solar photovoltaic (PV) arrays
• High performing Appliances s such as : refrigerators, Clothes dryer, Television and TV set-top (cable) boxes

 

Case 2

The Bullitt Center in Seattle, Washington, 6 storey Office block of approx 60,000ft2

Approaches to Net Zero Energy Building Design strategies:
• Day lighting harvesting
• geothermal heating and cooling,
• Operable windows and other measures to increase its energy efficiency.
• increase the height of each floor of the building to allow for improved day lighting further into the core of the structure,
• Reducing the need for heat-generating light fixtures.
• Geothermal and radiant floor heating & cooling are used to efficiently moderate temperatures
• The BMS controls the heating & cooling , the window shades, operable windows , composting, water treatment, and ventilation.
• photo voltaic used to create renewable energy
Case 3
Pusat Tenaga Malaysia Zero Energy Office Building ( PTM ZEO)

The area of building was 43,000sq ft averaging BEI of 35kW/sqm.year with a reduction of 80% of the national average BEI
It is the world’s first net zero energy commercial office building.

Approaches to Net Zero Energy Designs strategies :
• Double-pane windows reducing heat gain and provide day light harvesting.
• Energy efficient building envelope.
• Day lighting with controls of blinds and light shelves.
• High efficiency pumps and fans.
• Desiccant heat wheel DE-humidification.
• Energy efficient office equipment.
• Concrete slab thermal cooling and storage.
• Wet/ trickling water night cooling roof.
• Phase change thermal storage.
• photo voltaic used to create renewable energy
Case 4

NREL Building, USA

The floor area is about Area-360,000sq ft , energy use intensity target of the new building is 35 kBtu/SF/year, (110kWh/m2/year)
Approaches to Net Zero Energy Building Designs strategies :
The largest commercial Net-Zero Energy Building in the United States
Energy performance for the facility is 50% better than ASHRAE 90.1 standards.
• orientation of the building to minimize heat gain and
• maximize day lighting harvesting
• operable triple-glazed windows,
• hydronic heating and cooling using thermal slabs, and
• demand-controlled outside air system with energy recovery.
• a combination of evaporative cooling,
• outside air ventilation,
• waste heat capture
• efficient servers
• The data center has a remarkable power usage effectiveness (PUE) rating of 1.12 compared to a national average of 1.91
• photo voltaic used to create renewable energy 2.5 MW solar PV rooftop and parking canopy
Case 5

Pertamina Building
There Pertamina Building , a 99 storey office tower will be a Net Zero Energy Building

Approaches to Net Zero Energy Building Designs strategies :
• A ‘wind funnel generate energy.
• The tower’s curved facade will reduce the heat gain throughout the year.
• Exterior sun shades will dramatically improve the workplace environment
• Artificial lighting in the office
• photo voltaic used to create renewable energy
Other case are reported here read on: http://living-future.org/casestudies
Prepared by Net Zero Energy Building Architect Perumal Nagapushnam