Figure 37: Pilot study part 1 results Note: For all Graphs illustrated as figures in this document, the abbreviation SAH refers to Solar Air Heater.
Solar Air Heater: Pilot Study 45 40 35 30 25 20 15 10 5 0 06:00
08:00
10:00
12:00
14:00
16:00
Outlet of SAH
18:00
20:00
22:00
00:00
02:00
04:00
06:00
Ambient Temperature
After analysing the data, it is clear that the solar air heater produced sufficient heat when solar energy was available from 8:00 till 16:00, as indicated in red in Table 9. After the solar energy was unavailable from 16:00, the heat generated from the solar air heater simultaneously went down. The airspeed was measured at 2m/s at the outlet of the solar air heater. 5.1.4 CONCLUSION From the data gathered during part 1 of the pilot study, the solar air heater can generate sufficient heat from solar energy but will require additional heat storage material to provide heat after the solar energy is not available. The solar air heater only discharged sufficient heat for 8 hours of the day at 2m/s. 5.2 PILOT STUDY (Part 2) Part 2 of the pilot study will focus on the performance of the solar heating system when the rock bed heat collector is connected to the solar air heater. The rock bed heat collector will only be filled with 50% of the required rock to determine the heat storage capacity of the rocks.
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