6. Conclusions
A procedure for simulating the performance of water-inglass
evacuated tube solar water heaters has been developed.
Comparison between water-in-glass evacuated tube
solar water heaters and flat plate systems operating in
Sydney shows that an evacuated tube system with 30 tubes
has slightly lower energy savings than a two panel (3.7 m2
)
flat plate system. The performance of evacuated tube collector
system was shown to be less sensitive to tank size
than flat plate collector systems