Abstract: Process and equipment serving for the utilization of geothermic energy. In the course of the process water is introduced in a vapor producing pipe driven into the rock under the terrain and by making use of the geothermic heat, water is evaporated and the vapor is utilized such as for the generation of electrical energy. A superatmospheric pressure is set in the vapor producing pipe and a liquid (heat carrying medium) is let to trickle down in the tube, the saturated vapor of which contains 1000 kJ/m.sup.3 of latent heat of evaporation at the adjusted superatmospheric pressure. The equipment includes a vapor producing pipe embedded in the rock under the terrain, a liquid feeding device connected to the upper end of the vapor producing pipe as well as a device to serve for transforming the energy of the extracted vapor.

Abstract: A process and apparatus for recovering the heat content of oil-contaminated waste water wherein the waste water is collected and is conducted through a plurality of waste water carrying ducts with shut-off valves, from an oil manipulating system into a single duct with a shut-off valve; a duct with two branches attached to and leading from said shut-off valve; each branch of said branched duct having therein a magnet valve which operates contrarily to the magnet valve in the other branch; each of said magnet valves connected by means of a cable to an instrument which senses the oil content of the waste water, wherein if the instrument does not sense oil, one magnet valve is open and the other is closed, and if the instrument senses oil, the other magnet valve is open and the one magnet valve is closed; a pressurized sample collector connected via a duct to the one magnet valve intermediate said valve and said sensing instrument; said pressurized collector having therein a sampling place on a float connected b