2904ENV Principles of Sustainable
Design
Tutorial / Workshop 4 – Week 3
Aim: To identify multiple passive design
principles for two contrasting climate zones.
WORKING IN GROUPS OF TWO CONSIDER
THE FOLLOWING TWO DESIGN SCENARIOS:
•
Ireland
Detached House, Hilltop Rural (Belfast)
•
GC
Detached House, Flat Rural (Very busy road to North)
Task:
-
Suggest
and diagram 5 passive design strategies for each scenario
-
Compare
strategies for each of the sites noting similarities and differences, are there
strategies that can be applied to both climates?
-
Discuss
the advantages and disadvantages of both active and passive design (5 each)
Use Climate Consultant tool as a guide
A few examples
to be explored:
- Orientation
- Shading (last week’s tutorial)
- Insulation properties
- Thermal mass
- Cross ventilation
- stack effect
- earth sheltering
- vegetation / deciduous trees
- Orientation
- Shading (last week’s tutorial)
- Insulation properties
- Thermal mass
- Cross ventilation
- stack effect
- earth sheltering
- vegetation / deciduous trees
These
principles are a suggestion. The idea is for you to research and explore new
principles as a way to improve your knowledge in improving overall building
performance through passive design.
Delivery:
Arrange
your findings in a word document and email to your tutor.
Diagrams may be done by hand or digitally and must be submitted along with
discussion, in the word document. Diagrams should be annotated and require
minimal written description (see examples).
Insulation:
The house will have to use a lot of energy to heat up the area. Seen on climate consultant the temperature is well below the comfort zone, for most part of the year. By having good insulation, the house will have less heat lost therefore using less energy to maintain the house at a constant and desired temperature.
Advantages:
Savings in energy bills.
easier to control the interior climage
Disadvantages:
Higher construction cost.
A ventilation is needed out losing too much heat.
Thermal mass:
Thermal mass will help to absorb the heat from the sun and heaters.
For example granite floors, will slowly absorb the heat from the sun during the day time and slowly release the stored heat when the house cools down at night.
Advantages:
Savings in energy bills.
natural light which is good for health
Uses little energy to keep the house at a constant temperature.
Disadvantages:
High material cost.
Takes a lot of energy to heat up the space.
Orientation:
The house should be longways for east to west to allow a large south facade.
The house's living area should be facing south to optimise passive solar energy from the sun.
Advantages:
Savings in energy bills.
Can use more of the passive solar design strategies
Disadvantages:
If the envelope is already built it will cost a lot to change the orientation.
Stack effect:
The climate has cool air therefore the house as to be to heated, creating a pressure difference between the inside of the house and the out side. High pressure air created from heating will want to equalise with the low pressure from the outside, so its important to have the roof insulated
Advantages:
Can use a passive ventilation system.
Disadvantages:
If the house is poorly insulated there can be a lot of the heat loss.
Earth sheltering:
Will increase the external thermal mass and insulate the roof of the house. This will help with the stack effect.
Advantages:
Easy to keep a constant temperature.
Disadvantages:
Possibly bad for mental health, more to do with weather.
The house will have to use energy to cool down some areas. By having good insulation, the house will have less heat gain therefore using less energy to maintain the house at a constant and desired temperature.
Advantages:
Savings on energy bills
easier to control the interior climate via ventilation.
Disadvantages:
Higher construction cost.
A ventilation is needed out losing too much heat.
Orientation:
The house should be longways for east to west to allow a large north facade.
The house's living area should be facing north to optimise passive solar energy from the sun.
The alfresco should be facing to the south.
Ireland Detached House, Hilltop Rural (Belfast)
Insulation:
The house will have to use a lot of energy to heat up the area. Seen on climate consultant the temperature is well below the comfort zone, for most part of the year. By having good insulation, the house will have less heat lost therefore using less energy to maintain the house at a constant and desired temperature.
Advantages:
Savings in energy bills.
easier to control the interior climage
Disadvantages:
Higher construction cost.
A ventilation is needed out losing too much heat.
Thermal mass:
Thermal mass will help to absorb the heat from the sun and heaters.
For example granite floors, will slowly absorb the heat from the sun during the day time and slowly release the stored heat when the house cools down at night.
Advantages:
Savings in energy bills.
natural light which is good for health
Uses little energy to keep the house at a constant temperature.
Disadvantages:
High material cost.
Takes a lot of energy to heat up the space.
Orientation:
The house should be longways for east to west to allow a large south facade.
The house's living area should be facing south to optimise passive solar energy from the sun.
Advantages:
Savings in energy bills.
Can use more of the passive solar design strategies
Disadvantages:
If the envelope is already built it will cost a lot to change the orientation.
Stack effect:
The climate has cool air therefore the house as to be to heated, creating a pressure difference between the inside of the house and the out side. High pressure air created from heating will want to equalise with the low pressure from the outside, so its important to have the roof insulated
Advantages:
Can use a passive ventilation system.
Disadvantages:
If the house is poorly insulated there can be a lot of the heat loss.
Earth sheltering:
Will increase the external thermal mass and insulate the roof of the house. This will help with the stack effect.
Advantages:
Easy to keep a constant temperature.
Disadvantages:
Possibly bad for mental health, more to do with weather.
GC Detached House, Flat Rural (Very busy road to North):
Insulation:The house will have to use energy to cool down some areas. By having good insulation, the house will have less heat gain therefore using less energy to maintain the house at a constant and desired temperature.
Advantages:
Savings on energy bills
easier to control the interior climate via ventilation.
Disadvantages:
Higher construction cost.
A ventilation is needed out losing too much heat.
Orientation:
The house should be longways for east to west to allow a large north facade.
The house's living area should be facing north to optimise passive solar energy from the sun.
The alfresco should be facing to the south.
Shading:
There should be a small overhang of the roof to allow the winter sun to penetrate into the house and to block the high summer sun.
Thermal mass:
High Thermal mass in some area's can help climatise the house.
There should be a small overhang of the roof to allow the winter sun to penetrate into the house and to block the high summer sun.
Thermal mass:
High Thermal mass in some area's can help climatise the house.
Cross ventilation:
vegetation / deciduous trees:
vegetation / deciduous trees:
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