Selective Coating on Collector

The goal of any solar thermal collector is to absorb as much sunlight as possible and turn it into hot water while losing as little energy as possible. The selective coating applied to the collection surfaces allows the Thermomax collector to do just that. Black paint will only absorb about 50% of the sunlight hitting it, which means the other 50% is wasted energy. The TiNOX coating used on Thermomax collectors absorbs more than 90% of the sunlight hitting it. Any hot surface will also transfer energy to the surrounding environment by radiation.

The thing you are most familiar with that uses this principal is an incandescent light bulb. The filament in the light bulb is heated to very high temperatures and begins to produce light. Because a solar collector’s surface can also become very hot, it will lose energy in the same way. The selective coating reduces this loss down to 4% from around 50% with plain black paint. The quality and composition of the coating insures it will never degrade over time, meaning after 25 years the absorption will be the same as when the tubes are new.

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Learn More:

• Selective Coating on Collector
• Solar Collector Automatic Limiting Device
• Solar Thermal Heat Pipe
• High Vacuum Solar Collectors
• Solar Collector Soda-Lime Glass
• Solar Collector Hermetic Vacuum Seal and Flexible Neck

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