Controls System
Cambell
Scientific Datalogger
Parameters
necessary for future analysis and modification of the water and air
system include temperature and wind speed. There are seven recorded and
stored temperature inputs. The ambient environmental temperature and
the solar shed’s internal temperature are stored. There are three sets
of data recorded in the thermo siphon. J-type thermocouple wire, from
Omega Engineering Inc. is cut and installed at the bottom, middle, and
highest parts of the thermo siphon.
Omega Thermocouple
Campbell Scientific Anemometer
The system has four loads that must be
controlled. The first load is the thermo siphon circulation pump. This
pump moves the water that eventually warms the potable water. The
second load is the DC motor that opens and closes a small hinged door
that either circulates the interior air if open or brings in air from
outside if closed. The third load is the pump that refills the potable
water tanks. The fourth load is the UV sterilizer. All of the
controlled loads are switched by a MOSFET circuit that receives a
biasing (control) signal from the datalogger.
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