Solmat Systems, Ltd.

Ormat Turbines, Ltd.

Avi Raviv

Abraham Dahan

Fluid leakage through soil in a region thereof is controlled by sequentially passing over the region to dig a plurality of parallel, laterally displaced grooves in the surface. Soil dug from each groove is temporarily stored, and a strip of sheet material is laid over a groove as it is created during each pass, the width of the strip being greater than the width of the groove. Thereafter, the temporarily stored soil is deposited on the strip such that it is covered with soil except along one edge, the other edge of the strip overlying the uncovered edge of an adjacent strip laid down during a previous pass over the region. As a consequence, a first layer of overlapping strips of sheet material covered with soil is installed over the region.

Method of and apparatus for controlling fluid leakage through soil

Vaporized working fluid is supplied only to the condenser of a power plant of the type described when the power plant is cold started allowing condensate to lubricate the bearings of the prime mover before the latter begins to move. When the power plant is in steady-state operation, vaporized working fluid is supplied only to the prime mover.

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Rehovot, Israel

Avi Raviv