Liquid piston stirling pump
A Fluidyne engine is an alpha liquid piston stirling pump gamma type Stirling engine with one or more liquidpistons. It contains a working gas often airand either two liquid pistons or one liquid piston and a displacer. The engine was invented in liquid piston stirling pump Working gas in the engine is heated, and this causes it to expand and push on the water column.
This expansion cools the air which contracts, at the same time being pushed back by the weight of the displaced water column. The cycle then repeats. The U-tube version has no moving parts in the engine other than the liquid piston stirling pump and air, although there are two check valves in the pump.
This engine operates at a natural resonance cycle that is "tuned" by adjusting the geometry, generally with a "tuning tube" of water. In the classic configuration, the work produced via the water pistons is integrated with a water pump. The simple pump is external to the engine, and consists of two check valvesone on the intake and one on the outlet.
In the engine, the loop of oscillating liquid can be thought of as acting as a displacer piston. The liquid in the single tube extending to the pump acts as the power piston. Traditionally the pump is open to the atmosphere, and the hydraulic head is small, so that the absolute engine pressure is close to atmospheric pressure.
The videos show operation of a U-tube type model Fluidyne engine. Hot pipe is heated by a heat gun, and water liquid piston stirling pump oscillation builds up to a steady-state level. Second video shows a detail of the actual water displacement. Fluidyne pumps are commercially available. From Wikipedia, the free encyclopedia.
Oak Liquid piston stirling pump National Laboratory. Archived from the original PDF on May 24, Retrieved August 6, This report was prepared in support of the Liquid piston stirling pump Energy Applications and Training Project that is sponsored by the U.
It briefly outlines the performance that might be achievable from various kinds of Stirling-engine-driven irrigation pumps. Some emphasis is placed on the very simple liquid-piston engines that have been the subject of research in recent years and are suitable for manufacture in less well-developed countries. In addition to the results quoted here possible limits on M4 and pumping head for different-size engines and various operating conditionsthe method of calculation is described in sufficient detail for engineers to apply the techniques to other Stirling engine designs for comparison.
Liquid piston Stirling engines. A unifying perspective for some engines and refrigerators. Beale number West number. Timeline of heat engine technology. Retrieved from " https: Stirling engines Piston engines Pistons. Articles containing video liquid piston stirling pump. Views Read Edit View history. In other projects Wikimedia Commons. This page was last edited on 20 Januaryat By using this site, you agree to the Terms of Use and Privacy Policy.
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