Glycol Solar Panels

Propylene glycol pg has become the most common heat transfer fluid used in closed loop solar heating systems that contain antifreeze.

Glycol solar panels.

1st it must be able to with stand extreme high temperatures that can and will occur in a solar system including stagnation temperatures that can reach 410 f. Typically any time a system has a glycol bulk temperature in the range of 250 f 121 c fluid degradation increases. It s non toxic biodegradable and relatively stable. Consult a solar heating professional or the local authority having jurisdiction to determine the requirements for heat transfer fluid in solar water heating systems in your area.

When commissioning a pressurized glycol solar hot water system it is essential that all the air in the solar loop is removed. During static conditions the solar collectors should be completely empty so that the thermal fluid is not exposed to extreme temperatures. Glycol used in a solar water heater is unique and must have a few features that regular propylene glycol does not have. Solar365 green homes other the industry standard for solar fluid is a mix of propylene glycol and water.

Air in the loop can cause pump. At first air returns into the bucket and then glycol mixture with air and foam which can be very hot. In all three scenarios if a glycol fluid is used the residual glycol remaining in the panels becomes acidic and can cause corrosion issues. In some instances glycol antifreeze can also overheat within your home s solar panels leading to a reduction in the life and efficiency of the glycol an unwanted blockage of liquid within the system and potential corrosion of the pipework cylinders or worse still the panels themselves.

Sentinel r100 solar thermal fluid is glycol based and designed for use in solar heating equipment operating up to 200 c. The following are some of the most commonly used heat transfer fluids and their properties. Air in the collectors and the pipe is pushed out the purge hose back into the top of the bucket by the charge pump. Glycol is now pumped out of the bucket filling the solar collectors from the bottom to the top.

The spp corn glycol is specifically designed for chillers radiant heating air to water hydronic heat pump and solar thermal applications such as solar hot water or solar space heating.