smart energy in Europe

smart energy in Europe

Heat losses and gains

Termografhy of a building

insulationNatural : wood fiber, corkMineral: expanded clay, foamed glass Synthetic : expanded polystirene, polyuretaneRemember! 10 cm of good insulation correspond to 40 cm of wood, 60 cm of brick, 710 cm of concrete!

A lot of attention to windows!The eaves on the window allows in winter time to get gains from solar rays and in summer time to get shadow agaist sunshine

Bioclimatic architecture

INDIRECT SOLAR GAINSAir between window and wall is heated by sun and through air pump is sent inside while cold air is picked in the lowest part. In summer time air pump provides to an efficient circulation for refreshingTraditional building requires 169 kWh/m2 /year, a bioclimatic building requires 56 kWh/m2/year

Indication for better use of buildings. What can you do? 1) Is advisable to reduce the dispersion of heat with the use of double glazing in windows and the insulation of the walls. The energy consumption, in fact, can be reduced by up to 50%.2) Remember that dark surfaces absorb more solar radiation.3)Do not use curtains or blinds to shield the windows and glass surfaces on winter days, because the windows provide natural light and allow the heat of the sun to enter (heat storage).4) Keep doors and windows closed when heating and cooling5) Add shielding inside buildings (eg Venetian)6) use plants for shading, et cetera.7) Do proper use of windows (for the penetration of the sun during the winter, shading and night ventilation in summer)

THERMICAL COMFORTLOCAL AIR STREAM IN WINTERHEATING COMING FROM LOCAL RADIATIONNOT OMOGENOEUS VERTICAL TEMPERATUREFLOOR TEMPERATUTE TOO HOT

Thermical comfort: balance is maintained between humans and the environment and the heat produced by human body is removed by the body itself . Temperature should be omogeneous around 18-22C and humidity: 30-60%

thermal energy sourcesPetrol productsHeating pumpelectricitypelletswoodSolar systems

Thermal energy distributionRadiating sourceWall heatingRadiant strips

conditioningEERA 3.20 < EERB 3.20 EER > 3.00C 3.00 EER > 2.80D 2.80 EER > 2.60E 2.60 EER > 2.40F 2.40 EER > 2.20G 2.20 EER

Suggestions Avoid using air conditioning when possibleA fan can provide the same level of comfortAvoid unnecessary heat fluxesCurtains are excellent tools to prevent heat entrance in summerChoose a level of comfort between 22-25C (every degree below means 8% more energy)Keep doors ans windows closedProvide good insulationIf air conditioning has movable louvers, turn them to the ceiling (cold air goes down)Look carefully the class energyThe condenser has to be located outside in a well ventilated area

Now practice .Calculate energy class of your home!Check your fuel consumption during winter timeTransforme your fule consumption in kWhHow many m2 is the surface of your house?Compare your consumption and check energy class of your home

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