Concepts Of Green Building

Category: Education

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My seminar presentation in 7th semester civil engineering


By: yashi3102 (80 month(s) ago)

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Presented by: Jithin Jacob Koshy C711 BMCE

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INTRODUCTION After Industrial Revolution world witness incalculable technological achievements population growth corresponding increases in resource use Side Effects Results Straining the limits of the Earth’s ‘carrying capacity’. ie . Ability to provide the resources required to sustain life while retaining the capacity to regenerate and remain viable. 3 Pollution landfill at capacity Toxic waste Global warming Resource scarcity Ozone depletion Deforestation


What is a GREEN BUILDING ? A structure and using process that is environmentally responsible & resource efficient throughout a building’s life cycle. ie . From siting to design, construction, operation, maintenance, renovation and demolition. 4


Reduces overall built impact on human health and the natural environment by: Efficiently using energy, water and other resources. Protecting occupant health and improving employee productivity. Reducing waste, pollution and environment degradation. 5 Environmental Impact Reduction

Environmental Impact Reduction:

Rules adopted by Green Buildings: The greenest building is the building that doesn't get built. Every building should be as small as possible. It doesn’t contribute to sprawl. 6 Environmental Impact Reduction

Environmental Impact Reduction:

GOALS OF GREEN BUILDING Siting and structure design efficiency Energy efficiency Water efficiency Materials efficiency Indoor environmental quality enhancement Waste reduction 7


Siting and structure design efficiency 8 Why is it important? Foundation of any construction project is rooted in 2 stages: i . Concept stage ii. Design stage During all life-cycle stages of a construction project Concept stage minimize impact on cost & performance Design stage minimize impact on environment Buildings are complex products of diverse materials & components of various design variables to be decided at the design stage A variation of every design variable may affect the environment during life-cycle stages

Siting and structure design efficiency :

9 How can we achieve it? Materials & Elements : Should reflect, transmit & absorb solar radiation Energy Utilisation : Use renewable powers to: Reduce utility cost Environmental impacts of energy production Location : Develop in pedestrian friendly to: promote healthy life styles alternate modes of transportation Surfaces : If low traffic, use porous paved to: assist onsite stormwater infiltration reduce erosion

How can we achieve it?:

Energy efficiency 10 Why is it important? Aims to reduce energy consumption in : embodied energy to extract, process, transport and install building materials operating energy to provide services such as heating and power for equipment. High-performance buildings use less operating energy. Embodied energy has greater importance. Make up as much as 30% of the overall life cycle energy consumption.

Energy efficiency:

11 How we can achieve it? Building Material :Wood instead of brick,concrete or steel O rientation : Shade windows & roofs in summer Maximise solar gain in winter Effective Window placement Windows,Insulation :High Efficient for building envelope Barrier for conditioned space Energy Utilisation :Renewable Powers like Solar,Hydro , Wind,Bio mass Design :Passive solar building design Eg . Low-Energy Home

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Water efficiency 12 Why it is important? Aims in Reduction of water consumption Protection of water quality Demands on supply exceed the ability of aquifer to replenish itself Unnecessory wastage of water resources

Water efficiency:

13 How can we achieve it? Facilities : To increase the dependence of existing water Recycling : Water treatment and Heating : improves water quality & energy efficiency reduces amount of water in circulation Fixtures : Use water conserving fixtures Eg . Ultra low flush toilets,Low flow shower heads Design : Landscaping plan: Native,water retaining,drought resistant plants Rainwater harvesting system for irrigation Dual plumbing system: Reuse water for flushing,car washing etc.

How can we achieve it?:

Materials efficiency 14 Why is it important? Efficient use and reuse of material reduces i . Environmental impact ii. Liable cost How can we achieve it? Use non-toxic, reuseable , renewable & recyclable materials such as i . Coal combustion products ii. Foundry sand iii. Demolition debris in construction Should be extracted & manufactured locally to minimise embedded energy in transportation Manufacturing in off-site & bringing to site will: i . Minimise waste,noise &dust ii. Maximise recycling iii. High quality elements iv. Better OHS management

Materials efficiency:

Some materials used in Green construction Wool Brick Wool+Seaweed Polymer+ Clay 37 % more strength Resistant for cold and wet Solar Tiles Absorbs energy from sun Protect building Steady indoor temperature Ecofriendly Use rapidly renewable Bamboo instead of steel Sustainable Concrete Crushed glass,wood chip, slag from steel industry Reduction in CO 2 emission Paper insulation From recycled newspapers & cardboards Filled with chemical foam Insect & Fire resistant Triple-Glazed Windows Super-efficient windows Stops :Heat to enter building Direct sunlight 15

Some materials used in Green construction:

Indoor environmental quality enhancement 16 We spend on average 90% of our time inside the buildings. Enhancing indoor air quality in building provide occupants, a. comfort b. well-being c. productivity . Indoor air quality seeks to reduce  volatile organic compounds (VOC) air impurities like microbial contaminants. Why is it important?

Indoor environmental quality enhancement :

17 Materials : Materials emit few/no carcinogens,irritants , reproductive toxicants , VOC s etc. Moisture resisting : Resist biological contaminant growth by insulated & tightly sealed envelope ventilation to eliminate moisture from indoor activites Design : HVAC system with welldesigned envelope for i . Thermal quality ii.Lighting quality iii. Energy performance Flooring : Smooth surfaced wood instead of carpets to: prevent allergies due to dust absorption & release of moisture in air absorption of sound How can we achieve it?

How can we achieve it?:

Waste reduction 18 Aims to reduce waste of energy, water and materials used during construction. Nearly 60% of India's waste comes from buildings. During construction phase,one goal should be to reduce the amount of material going to landfills. Why is it important?

Waste reduction:

19 How can we achieve it? Materials : Wood is preferred : Light & easy to work,so easy renovation Extends useful life, thus reduces waste Design : Well designed buildings helps to: reduce amount of waste by occupants provide onsite solutions,Eg.compost bin Deconstruction : After building’s useful life: demolish & haul it to landfills reclaim ‘waste’ to useful build materials Water Utilisation : Greywater is used for: subsurface irrigation non-potable purposes, Eg . Flushing Rainwater collectors are also used

How can we achieve it?:

Green Building with heartland Builders,LLC 20 TYPICAL LAYOUT FOR A GREEN BUILDING

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Economical Benefits Reduced operating costs Marketing advantages Increase building valuation Optimizes life-cycle performance cost Improve occupant productivity Environmental Benefits Enhance & protect biodiversity & ecosystems Improve air &water quality Reduce waste streams Conserve & restore natural resources MERITS OF GREEN BUILDING Social Benefits Enhance occupant comfort & health Heighten aesthetic qualities Minimize strain on local infrastructure Improve overall quality of life

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DEMERITS OF GREEN BUILDING High initial cost Material unavailability More construction time Need skilled workers Difficult in developing countries Sacrifice of IEQ to achieve other goals

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