Why are flat plate collectors suitable for use in hot areas?

In colder regions, their efficiency can be impacted by the temperature conditions. The perception that flat plate collectors are more suitable for hot areas may arise from a few key factors:

Freeze Protection:

Flat plate collectors are often designed with a glazing or cover that allows sunlight to enter but reduces heat loss. However, these designs may not provide adequate insulation against extremely low temperatures.

In colder climates, there is a risk of freezing when water or heat transfer fluid inside the collector tubes is exposed to sub-zero temperatures. To address this issue, additional measures such as anti-freeze solutions or drain-back systems are often required, increasing the complexity and cost of the system.

Thermal Performance:

In extremely cold climates, where temperatures drop significantly, the efficiency of flat plate collectors may be reduced. The heat transfer fluid inside the collector may not reach the desired temperature, impacting the overall performance of the system.

Snow Accumulation:

Flat plate collectors can be more susceptible to snow accumulation, especially if installed at an angle that allows snow to accumulate on the surface. Snow cover can block sunlight and reduce the collector's ability to absorb solar energy.