Hi, John. It is best recommended to use at least a pump to supply sufficient amount of flow to the panels. When sizing a pump that is or greater it is required to have 2" or larger PVC. If you are thinking of converting to Variable Speed Pump I would suggest reviewing other options. When operating Solar Panels, you would set the equipment to operate at the higher speed. When the Solar Panels are not in use you can program the pump to operate at lower speeds. Operating Solar Panel with Variable Speed equipment is best used with an Automation System. Click here to view the Hayward EcoStar Variable Speed Pump. Click here to view the IntelliFlo Variable Speed Pump.
During manufacture, steel fiber performance was tested using the flexural beam test. It was found that the flexural beam test result gives a relatively large scatter compared with the compressive and tensile splitting tests, particularly for the fR1 values. The larger scatter sometimes pulled the estimated characteristic strengths below the required minimum performance target. On the other hand, the cube and splitting strength generally had consistent and above-specified test results. The modified material model was used to reassess the segment joint capacity, and to establish the acceptability of batches of segments based on the characteristic flexural strengths measured from the segment production tests. From the reassessment results, maximum overburden that those segments were able to withstand was determined. This was to allow AAJV to identify zones along the alignment that those segments could be safely installed, instead of rejecting large quantities of segments.