Solar thermal systems are one of the most popular applications of solar energy. They are very useful for the production of domestic hot water, but can also be used to supplement heating and cooling systems. But what material should be used for these systems?
Solar thermal systems: when to choose carbon steel?
There are many elements used in the construction of solar thermal systems, from fittings and pipes to bolts. But what is the most suitable material for this type of application? The indecision could be between carbon steel and stainless steel. Carbon steel can only be used if the system is a closed-circuit. This is because, in the presence of oxygen, carbon steel can trigger corrosion. The use of this type of steel, therefore, will only be possible for:
– heating
– domestic water systems where the circuits are separated.
Solar thermal systems: why choose stainless steel?
In contrast to carbon steel, stainless steel can also be used for hot water supply. Although it is more expensive than carbon steel, stainless steel offers many advantages. But which ones specifically?
– Corrosion resistance
– Longer service life.
Obviously, for both stainless steel and carbon steel, the thermosolar systems must be insulated with closed-cell materials, both to avoid condensation and to save energy.
Solar thermal systems: which components to use?
Stainless steel plays a key role in solar technology, as many components are used in this type of system, for example:
- Nuts
- Rings
- Collars for fixing pipes
- Nipples
- Various fittings
- etc..
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