Planning and building energy efficiency buildings

Manar Ramadan

Planning and building energy efficiency building

Why energy efficiency buildings?

Agenda

Goal 11: Sustainable cities and communitiesLife time sustainabilityReduction in fuel and electricity bills cost Low running cost on the building life cycleEnvironmental friendly

Why an Energy efficiency building?

Pillars of sustainability• Lower energy demand • Less operating costEconomical

ly

• Less dependence on fossil fuels (Co2 emissions)

• Less pressure on the environment and resources

• Sustainable energy access

Environment

• Healthier for the individuals• Natural healthy setting will increase

people’s productivitySocially

i. Site selectionDistance from basic servicesLow altitude winter sun spot (passive solar

heating)Natural wind shelters (less heat loss)Renewable energy potential spots

1. Fundamental planning decisions

ii. Building form and orientationCompact building (A/V ratio) Longer sides facing the south (light, heat)Projects like bay and dormer should be kept to

minimumPitched roofs towards the south for solar

collection

iii. Energy assessment What kind of energy will be used? Solar? Bio? Calculation of consumption and compare

alternatives

1. Fundamental planning decisions

(i) Insulation:Both ceilings and floorsAvoid thermal bridges (more heat loss,

condensation)(ii) Ventilation:

Adequate openings to assure efficient natural ventilationMechanical ventilation with heat recovery

2. Building fabrics and structure

(iii) Passive solar featuresAvoid increased south facing glass areasChoose windowns with low emissivity Choose double glazing to reduce heat lossWell fitting curtains on glasses

(iv) Building materialIt should have least environmental impactLong life and durabilityRecyclable

2. Building fabrics and structure

Active solar heating systems (60% of a family hot water need)

Hybrid system could also be implemented

3. Heating systems

Grey water recycleLaundry and toilet flushingIrrigation: nutrients (P,N ) excellent for the

plantsRain water harvestingWaste management

Bio fuelCompoting

4. Other points:

Thank you …