6.7 COST ANALYSIS In Table 10, the total cost of the solar heating system was utilised in this experiment to determine the project’s cost-effectiveness.
Table 10: Cost analysis Material Solar air heater: Chromadek sheeting 152mm x 38 Timber frame 4mm thick clear glass News Paper Bubble wrap Backing board 5 Watt solar panel 1.5 Watt circulation fan Fixing screws (50) Wood glue (500ml) Sub-total for solar air heater Rock bed heat collector: 100-150mm Rock Shutter board 50mm Thick polystyrene U-Pvc pipes Fixing screws (50) Wood glue (500ml) Sub-total for rock bed Total cost
Cost R70,00 No cost R30,00 No cost No cost No cost R90,00 R87,00 R37,00 R45,00 R359,00 No cost No cost No cost R68,00 R37,00 R45,00 R150,00 R509,00
The total cost for the solar air heater is R359,00, and the cost for the rock bed heat collector is R150,00. The total cost for the solar heating system is R509,00. The cost of the system is competitive with the commercial products available on the market.
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