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Energy Efficient Buildings are a tribute to the Environment

07 Jun

It is being foretold by many experts, that it would be innovative business strategy and restructuring of the Corporate conduct which would help stop Global Warming.  The World Business Council for Sustainable Development (WBCSD) and The CII -ITC Centre of Excellence for Sustainable Development (CIICESD) are perhaps the vanguard for abatement of Climate Change, should one agree to the statement above.

World Business Council for Sustainable Development

World Business Council for Sustainable Development (Photo credit: Wikipedia)

The CIICESD which generates awareness & thought leadership, and builds organization capacity to achieve sustainability and the WBCSD which is a CEO-led organization of forward-thinking companies that galvanizes the global business community to create a sustainable future for business, society and the environment. These organisations, soon be able to convince all business to morph into what is now becoming popular in the USA and soon would encompass the World, the B-CORP . It is not only the matter of Salvation of the Earth, but deeply entwined with Earth’s fate is the survival of the Business community and thus by default the modern society itself.

Close cooperation between all stakeholders in society is essential to creating a sustainable future for business, society and the environment. And the key elements of all business revolve around 3 fundamental needs of humans – Food, Clothing and Shelter.

Se below

Se below (Photo credit: Wikipedia)

A Sustainable village would be one which is fashioned such, that it ultimately provides near self sufficiency in most areas and excel in some; which become the  core trading with other self-sufficient towns but lacking expertise or sufficiency in those which the other has. Thus a perfect symbiosis and balance can be achieved. But the first step to obtain the desired level of sustainability and making it norm, would require us to build the new cities and retro-fit, where possible the old ones in accordance to the ideas of sustainability.  Below is an attempt to provide a very brief over-view of what should be achieved.

THE BUILDING SECTOR

The building sector can be viewed as being comprised of two broad elements:

Residential buildings — housing the population; and

Commercial buildings — housing a range of activities including retail trade, accommodation, business services, government and government agencies, recreation and cultural services and industry, which represents around two thirds of national employment.

Component parts of the building sector are noted in chart

Residential Building Commercial Building
Detached housesAttached dwellingsBuildings containing two or more sole occupancy units Wholesale tradeRetailAccommodation, cafes and restaurantsCommunication servicesFinance and insuranceProperty and business servicesGovernment administration andDefense

Education

Health and community services

Cultural and recreational services

Personal and other services

The estimate of greenhouse gas emissions due to energy consumption in the building sector takes account of:
1. The amount of energy consumed; [inclusive of embodied energy in materials]
2. The mix of fuels used;
3. The average greenhouse gas emissions from the different fuels (electricity is treated as a fuel); and
4. Upstream emissions from transmission and other activities.

The electricity consumed within a building is only a part of the energy used to support that demand. A large amount of electricity and greenhouse gas emissions is also involved in distribution, transmission and generation. When reducing demand for electricity it is practical to eliminate the need for this upstream energy use and GHG emissions. A larger proportion of GHG emissions are attributable to the building sector than its share of energy use because the building sector uses greenhouse gas intensive energy. Notably the building sector energy end use is dominated by electricity consumption which is dominated by coal fired generation located at the end of long transmission networks.

Emissions from the building sector are broadly of the same scale as emissions produced by the entire transport sector.

Facts
• Buildings’ share of final energy consumption: 30-40%
• Global CO2 emissions from energy in buildings (2005): 9Gt
• Estimated growth by 2050 in all 6 EEB regions: 76%
• Growth in global population by 2050: 2.7 billion or 42%

Many energy efficiency projects are feasible with today’s energy costs. Building energy efficiency investments in the six EEB regions (Brazil, China, Europe, India, Japan and the US) studied, totalling US$ 150 billion annually, will reduce related energy use and the corresponding carbon footprint in the range of 40% with five-year discounted paybacks for the owners. A further US$ 150 billion with paybacks between five and 10 years will add 12 percentage points and bring the total reduction to slightly more than half.
(WBCSD-2010)

THE ABATEMENT POTENTIAL

The building sector could reduce its GHG emissions by 30–35 per cent by 2050 on an economic basis. Economic in this context means that the initial costs would be offset — and in many cases be more than offset — by subsequent energy savings over time.

In the residential sector changes can be achieved through:
1. Substitution for more energy efficient light fittings;
2. Greater use of natural light;
3. Substitution for more efficient refrigeration;
4. Adoption of more efficient hot water appliances with solar where possible;
5. Adoption of appliances with a low standby energy use;
6. The introduction of more efficient heating and cooling mechanical systems; and better insulation.
7. Where possible use of Renewable Energy solutions as feasible.

In commercial buildings substantial savings to both costs and greenhouse gas emissions could be generated by:
1. Improving air conditioning systems efficiency and including ‘economy’ cycles;
2. Use of natural ventilation where possible;
3. The use of more efficient office appliances;
4. Better insulation;
5. Improved heating and ventilation;
6. The use of efficient light fixtures;
7. Upgrading to more efficient water heating systems; and
8. Where possible use of Renewable Energy solutions as feasible.

Under each area, detailed topics have been sorted out according to time span to wide adoption in construction:
1. State-of the art [current situation]: technologies that are already commonly used in the industry form the baseline for future development,
2. Short term […2013]: technologies that are available and are ready for being used in construction;
3. Medium term […2020]: technologies that offer beneficial opportunities for construction but need to be adopted or further developed for construction.
4. Long term […2030]: emerging new technologies that are deemed to offer benefits to construction in ling term in applications that still need to be identified.

STATE-OF THE ART & SHORT TERM ACTIONS:

1. Design and demonstrate energy positive new building solutions:
1. RE -driven µCHCP [“combined heat, cooling, and power production”]
2. Smart & small AHU
3. Passive energy storing construction materials/design
4. LED/Induction Lighting
5. Smart glazing
6. E&C [effective daylight capture through ceiling]
2. Design and demonstrate prefabricated and modular energy retrofit solutions, like:
1. Multifunctional building envelope solutions
2. Low temperature heating and cooling solutions [ LowEX ]
3. Hybrid ventilation solutions
4. Advanced lighting solutions
5. Building and community systems
3. Develop performance indicators and criteria for sustainability, environmental impacts and GHG reductions in buildings [ low energy class, energy star , etc]
4. Develop advanced control system, sensor networks, user-interfaces and information management technology to improve energy efficiency and reduce negative environmental impacts in buildings and communities : wireless sensor/ actuator network; smart meters; dynamic heat and power grids.

Note:
End-use efficiency gains are likely to take the lion’s share of energy reductions, and in many cases will be the most economically viable option. Analysis of the potential to reduce carbon dioxide emissions from energy shows that substantial reductions are needed both in energy generation and consumption.

There are three elements:
1. Use less energy – cut buildings’ energy demand by improved design, using insulation and equipment that is more energy efficient
2. Make more energy locally – produce energy locally from renewable and otherwise wasted energy resources
3. Share energy – create buildings that can generate surplus energy and feed it into an intelligent grid infrastructure to balance the energy needs of other buildings

MEDIUM & LONG TERM ACTIONS:

5. Design and demonstrate more solutions for energy positive buildings [new & retrofit]:
1. Vacuum frame
2. Cabrio-facades
3. Lego (retrofitting) building elements & interior furbishing
4. Compact seasonal heat/cold storages
6. Demonstrate Zero -or Plus-Energy communities
1. Intuitive, educational, self-learning E & C ms
2. HRU-bank for HHA [and waste water]
7. Develop more solutions for energy positive new buildings and retrofit:
1. Thermo-chemical material for heat storage
2. Daylight storage
3. H2produced from the sun
4. Vacuum envelope
8. Develop solutions supporting energy positive communities:
1. Energy -HUB; economic driven buildings [industry] & transport
2. DC grids
3. PV&T wipe & pipe free
4. Wireless energy exchange
9. Demonstrate Sustainable communities
1. Economic efficiency by integrated system optimization [optimal use of energy]

It is now time that all stake-holders, should enter the market, there are opportunities for architects, engineers, property developers, the finance community and others in the building sector to capitalize on energy efficiency opportunities to build the “hybrid house”.

Private Sector Jobs - April 2011

Private Sector Jobs – April 2011 (Photo credit: Leader Nancy Pelosi)

Business which are totally moribund can be revitalized with new energy and direction. Architects should be ready to take the responsibility to act as the integrator of different systems, building parts and services into a solution that fulfils the end-user’s needs. And create Buildings that are G.O.L.D (Globally Optimised Locally Designed). Instead of components or buildings, offering integrated and performance based solutions for energy efficient & environmentally friendly buildings and communities that support sustainability.

Courtesy: WBCSD

 

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