- Passive cooling
- It is achieved in two steps:
- Prevent heat transfer
Shading, proper window positioning and are significantly effective.
Proper Roof Design
Remove heat from the building
For hot humid climates TACS are mostly used, whereas cooling towers & solar chimneys and ventilation techniques are prefered in mild climates.
Active Cooling – Thermally Activated Cooling systems
These systems use the sun to provide 30% to 60% of a building’s cooling requirements. Usually, they are supported by an alternative fuel source such as natural gas.
TACS is divided into two categories:
- Generally, TACS are not prefered because they are too expensive to install and they need large solar fields to collect the sun’s energy.
- Read more on the impact of water on the environment at water-kingdom.com
The passive solar ventilation concept is very simple. It just works as a greenhouse does. It uses the ability of hot air to go up, to insert or remove air from the building.
Using a solar chimney, a solar wall or a solar room we create air updraft to produce ventilation.
In winter, hot air is driven into the house to heat it.
In the summer, ventilation can be used to cool a room.
P.S. Solar thermal power is one of the most effective forms of solar energy because we can use it as it is. Why should we invest in passive solar heating, cooling and ventilation? Because using the sun’s renewable energy, they offset zero carbon dioxide helping to save the environment. Solar heating, cooling and ventilation are the most used technologies for residential solar energy use.