6.3 FULL EXPERIMENT - PART 3: VENTILATED COOLING SYSTEM 6.3.1 INTRODUCTION In parts 3 and 4 of the experiment, the possibility of using the solar heating system as a cooling device was tested. Part 3 focussed on a ventilated cooling system, which uses ambient air to cool the rocks of the rock bed. The system provides fresh air 24 hours per day. Figure 68 illustrates the ventilated cooling system. The system runs for 24 hours per day without any human intervention. The system allows for 50% fresh air, and 50% recirculated air; this will be discussed further under the methodology. Cool ambient air /cools the rocks during the evening. During the day, the warm air flows over the rocks, and the heat is exchanged between the air and rocks, which allows the warm air to cool down. Cool air is supplied through the outlet of the rock bed.
Figure 68: Diagram of ventilated cooling system
69
