Solar Panel Expansion Vessel

1 x controller pump.

Solar panel expansion vessel. Vapour in the expansion vessel itself is not wanted because the high temperature of the vapour damages the membrane. This prevents vapour from entering the expansion vessel as much as possible. A first generation solar heating panel with mcs approved components and a 25 year lifespan. Self install flat plate solar panels.

1 x 20 litres glycol fluid. The expansion vessel in a solar installation is placed on the pressure side of the circulation pump see figure 2. The solar expansion tanks has a rubber membrane which separates the solar liquid loop and the other side is filled with pressurized air. Although we can pump them up with a foot pump it is likely that the vessel will deflate again if the pressure has been lost before.

1 x roof fixing kit. As the liquid heats up and expands the pressure of the system increase to an amount greater than the air pressure inside the expansion vessel and causes the membrane to take up more liquid to the air side. An expansion vessel must ensure the solar system can work safely particularly during periods when hot water is not being drawn off. During this period modern solar collectors may reach temperatures up to 200 c and consequently the fluid within the system can either evaporate or reach levels that can damage all the components within the solar energy system over time.

1 x 25 litre expansion vessel. The expansion vessel buffers this maintaining an even pressure.