Solar Expansion Vessel Calculator

The expansion volume is calculated as follows.

Solar expansion vessel calculator.

Output of flexcon m 0 72. It s possible to calculate the required volume of the expansion vessel. Nominal volume of the expansion vessel litres ve. Vn ve vv vd x pmax 1 pmax pprec vn.

The temperature in the flexcon expansion vessel must remain above 10 ºc. Certifications and approvals heat exchangers. An expansion vessel must ensure the solar system can work safely particularly during periods when hot water is not being drawn off. Certifications and approvals expansion vessel.

Calculate the expansion vessel volume using the formula. Prior to installation of the expansion vessel or prior to filling the heating circuit at the latest adjust the pressure in the expansion vessel from the pre charge value to ph min. Expansion volume of the solar uid litres. Ve n x va vv.

The calculation is valid in the hypothesis that the initial pressure hydrostatic pressure on the expansion vessel is not higher than the pre charge pressure. The formula to size the expansion vessels for solar systems is the following. The expansion vessel in a solar installation is placed on the pressure side of the circulation pump see figure 2. Expansion vessels for pump applications.

Output of flexcon 800 liter expansion vessel 0 5 flexcon 1 000 liter expansion vessel 0 4. Amount of solar uid stored in the expansion vessel. This is the pressure created by the static height hst of the system between the connection point of the flexcon expansion vessel and the highest point in metres of water column 1 metre water column 0 1 bar. On this point consider that a water column of 10 meters exerts a 1 bar pressure.

Select the nearest bigger size from the expansion vessel line. 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. Vapour pressure p d.

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. This is the total capacity of the flexcon expansion vessel.