Building a Solar Air Heater
A solar air heater is a device that collects solar thermal energy and transfers it to the ambient air in your home. Its a very simple device and can be build from waste materials if necessary.The control system for a solar air heater is very simple, it should monitor the ambient air inside and the air that comes from the air heater, and regulate the ventilation based on the temperature.
- Outside air to cold, no ventilation
- Outside air to hot no ventilation
- in Between ventilate
A control system for a SAH can be build using a picaxe microcontroller and two temperature sensors. These can be I2C absolute (calibrated) sensors or thermistors.
You need the following mateirals to build a control system, of course the size of the ventilator and the solar panel depend on the amount of air you expect to be moving.
- Ventilator
- Solar panel
- Control box
- Thermristors/ I2C temp sensors
- Other electronics
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