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Climate Considerations for Solar Collectors
When it comes to your local climate, there are some factors that can seriously affect your choice of collector type. The worst non-catastrophic climatic event for solar thermal installations is, without any doubt, snow. It's the worst because, unlike rain or total cloud cover, it can physically pile up on top of the collector and block out the sun's light.
Solar Fluids in Solar Thermal Systems
Despite all the advances of modern technology, the best solar fluid for use in a solar thermal installation is water. It retains and transfers heat better than any other liquid in the world. However, it has one major drawback: it freezes easily.
Using Propylene Glycol in Solar Thermal Systems
The industry standard for solar fluid is a mix of propylene glycol and water. It's non-toxic, biodegradable and relatively stable. However, you should always mix as much water as possible with your choice of glycol product, as simple water is the ideal solar fluid.
Solar Thermal Expansion Tanks
As everyone knows, just about everything expands when it gets hotter. With gases, they can exist in the same space and build up pressure, but liquids have difficulty doing that – when a liquid expands, it needs more space.
Three Simple Steps to Save Water and Money
When you first set foot in the renewable energy arena, it can look daunting: different technologies, different approaches, net-zero, net-positive, PV arrays, solar thermal, geothermal, wind power... it's a big subject and can be confusing. So where should you start?
There are some things you can do to save energy and money before you install even the simplest renewable energy system. The three simple steps are to reduce losses, increase efficiency and reduce consumption.
Integral Collector Storage
Integral collector storage (ICS) solar hot water systems are the cheapest, simplest installations. Consequently, they have more limitations than other, more robust setups but are a lot easier to set up and maintain. They are open, passive systems.
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