smart energy in europe
DESCRIPTION
smart energy in Europe. Heat losses and gains. Termografhy of a building. insulation. Synthetic : expanded polystirene , polyuretane. Natural : wood fiber , cork. Mineral : expanded clay , foamed glass. - PowerPoint PPT PresentationTRANSCRIPT
insulationNatural : wood fiber, cork Mineral: expanded
clay, foamed glass
Synthetic : expanded
polystirene, polyuretane
Remember! 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
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 refreshing
Traditional 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 COMFORT
LOCAL AIR STREAM IN WINTERHEATING COMING FROM LOCAL RADIATION
NOT 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 18-22°C and
humidity: 30-60%
conditioning
EERA 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 possible• A fan can provide the same level of comfort• Avoid unnecessary heat fluxes• Curtains are excellent tools to prevent heat entrance in summer• Choose a level of comfort between 22-25°C (every degree below means
8% more energy)• Keep doors ans windows closed• Provide good insulation• If air conditioning has movable louvers, turn them to the ceiling (cold air
goes down)• Look carefully the class energy• The condenser has to be located outside in a well ventilated area