Transcript Snímka 1 - Plus energy house

Plus – Energy House
12 steps to our energy plus house
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1. Structural conditions
2. Conceptual conditions
3. Increased thermal insulation envelope
4. Prevention of thermal bridges
5. Passive use of solar energy and thermal storage
6. Active use of solar energy
7. Optimally chosen heating system
8. Energy efficient preparing of hot water
9. Ventilation device with heat recovery
10. Efficient use of electricity
11. Conscious behavior of users
12. Positive ecological balance of the house
1. Structural
onditions
 Placement of buildings on the southern exposure is especially important
direction of slope on sunny side.
 Weather conditions in the area affect the consumption heating energy
buildings. Directing the appropriate property in wind direction, improving the
aerodynamics of the building (compact form), limiting the height of a suitable
layout of the surrounding vegetation.
Rivers and lakes moderates temperature fluctuations, and therefore have an
important function of climate.
 Wooded areas have a significant regulatory role for the local climate, air
purification, retain moisture and regulate the humidity and ambient
temperature, protected from the wind, create leisure and recreational areas.
Planting trees and shrubs can be protected upper house from the effects of
wind, cold and noise, and additionally improves air quality.
Climate Conditions in Prešov
 Latitude :48°59′47.22″ N
 Longitude :21°14′19.39″ E
 Altitude : 296 m. n. m
 Solar radiation : 1225 - 1275 kWh/m2 year
 Avarage temperature : 8 – 11 ° C
 Prevailing wind direction :
The annual average prevailing direction: north –
22, northwest - 20
Next: South - 19, North East - 13, South East - 11,
southwest - 6 West - 2 East - 2, with no wind - 5
2. Conceptual conditions
 In shape designing of the house we assume the condition, that will be
the required volume at the lowest surface structure (the optimal shape
is a sphere, respectively hemisphere). Compact, rugged little building
with a few breaks, projections or balconies has a smaller loss of heat
transfer.
3. Increased thermal insulation envelope
 Windows - the majority of households lost more than 25% of heat through
windows. Therefore, an energy-efficient house is in the north, east and west
windows in the area from 8 to 9% of the floor area. And then increasing
window area on the south side of the house about 12% of the floor space.
 The roofs of these houses are notably known to need high heat protection
therefore should be chosen such a roof in which we achieve the minimum of
heat loss. The ideal solution would be a sphere or hemisphere. It is known that
this shape is not very practical for common living. The ideal shape of the roof
would be less elongated rectangular with the longer side and reversed on the
south roof, slightly inclined to the north.
 http://www.youtube.com/watch?v=VFjxWdPPY1Q
Heat Loss
4. Prevention of thermal bridges
 Thermal bridges arise in the places, where they are connected to each other
building materials with different thermal conductivity. The thermal isolation
bridges reduce internal temperature. This can lead to other problems :
condensation, moisture, mold growth, creating cracks etc. Therefore, the
correct design and the proper insulation of thermal bridges has a significant
potential benefits:
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Prevention of structural problems: surface condensation,
aesthetic problems, cracking
Protection against mold
Reducing heat loss - saving energy (heat loss due to conductivity
can be reduced by 10%)
Improved thermal comfort
Thermal Bridges
5. Passive use of solar energy and thermal storage
 The essence of the concept of a solar house is a passive use of solar energy thus heating of rooms direct sunlight. The energy consumption for heating is
about 10 to 20% lower than standard buildings. The main principle is focusing
of all the large windows on the south.
 Protection against overheating of the building:
The primary objective of the summer thermal protection is prevention against
overheating of the internal space. It should be also restricted to use of electrical
and ventilation equipment to apply less demanding, but it must be effective
enough to measure such as mechanical shielding, adequate ventilation, favor
massive mass of buildings and water areas.
Solar
Energy
6. Active use of solar energy
 Active solar heating system uses solar energy and transforms it into heat
energy. Solar systems are mostly used for heating water, heating swimming
pools, greenhouses, etc. It can be used to support heating.
7. Optimally chosen heating system
 Terms of the heating system can be summarized into three basic groups:
- Building requirements - architectural and urban concepts of
construction, its layout, thermal properties of building structures and
outdoor climatic conditions. These requirements relate to the shape,
location and properties of building materials.
- Requirements for heating system - the fuel base available, the use of
space heating, thermal comfort requirements.
- Operational requirements – requirements for operation, maintenance
and comfort, esthetic and more.
 When you have whatever heating system, make sure that it is designed and
tailored exactly to your house. Just so there is a presumption of economical and
safe operation.
Heating System
8. Energy efficient preparing of hot water
 Use equipment economically and environmentally appropriate, such as heat
pumps are powered by natural refrigerants such as ammonia (NH3)
 In particular, energy-saving applications are mainly linked to
heat recovery from industrial processes. Produced waste heat can be
profitably reused in buildings - potential that is barely used for a long time
9. Ventilation device with heat recovery
What is a heat recovery?
Recovery or heat recovery is a process , where the air is supplied to the building
hot exhaust of air preheats. Therefore, warm air does not escape through the
open window, but in the recovery exchanger transmitted most of its heat
supplied to fresh air.
Main advantages of heat recovery :
- provides the necessary fresh air
- provides healthy microclimate without moisture, without the occurrence of
mold, without pollen and dust-free
Principle of Heat
Recovery
10. Efficient Use of Electricity
 Use
 energy
 efficient
 equipment
Lightning
Using
of economical
bulbs
11. Conscious behavior of users
 Qualified staff, consideration of the day and season, proper
operation of technical equipment, limiting the heat losses
due to ventilation, windows, etc..
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Average annual energy consumption in standby mode :
TV 9.03 eur
Radio 7.46 eur
Microwave oven 4.31 eur
Satelite set 47.36 eur
PC with all components 57.23 eur
12. Positive ecological balance
of the house
 Taking into account the balance of the total life cycle, the
energy plus houses satisfy all the criteria with a positive
impact on the creating of a healthy indoor climate etc..
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Thank you
for your
attention
Have a nice journey to
Slovakia