Operation and Maintenance

Equilibrium pumping is often used for plume management; however, nonequilibrium pumping has advantages in cases of floating and sinking plumes and can be used to flush sorbed contaminants associated with the residual phase. Pulsed pumping of recovery wells can be used to washout residuals from unsaturated zones, allow contaminants to diffuse out of low permeability zones, and flush and bring stagnant zones into active flow paths. Pulsed pumping, however, incurs additional costs and concerns that must be evaluated for site specific conditions (U.S. EPA 1989).

Solar Stirling Engine Basics Explained

Solar Stirling Engine Basics Explained

The solar Stirling engine is progressively becoming a viable alternative to solar panels for its higher efficiency. Stirling engines might be the best way to harvest the power provided by the sun. This is an easy-to-understand explanation of how Stirling engines work, the different types, and why they are more efficient than steam engines.

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