Fluidyne Engine R&D. Homepage von Max. Fluidyne Stirling. Fluidyne engine 1. Back to homepageFluidyne engineFluidyne engine is a type of Stirling engine in which regular moving pistons have been replaced by moving water column. Since water column always fits the cylinder, machining and fitting the piston to the cylinder is unnecessary. Various sources have reported efficiencies of some types of large Fluidyne engines to reach 5%. Smaller engines are usually much less efficient. For scientific discussion, Stirling Engines and Irrigation Pumping paper by C. Basic Fluidyne setup with coil wound on top of the hot chamber. Possible use for a Fluidyne is water pumping, using solar concentrators to deliver useful heat energy to the hot chamber.
Initially I used a heat gun instead of induced current for heating the hot chamber pipe. AC induction heating turned out to be a bit more difficult than expected. I assembled a rough wooden frame from pieces leftover from previous projects. Hot tube is covered with insulation to reduce heat loss. DeSoto solar-powered Fluidyne. Fluidyne Stirling engine - ProtoSpace Wiki. From ProtoSpace Wiki Functioning of the engine How a fluidyne stirling engine would pump water The fluidyne stirling engine, a stirling engine with two liquid columns instead of solid pistons, is an alpha type stirling engine.
Because of this the two pistons are acting both as the displacement piston, and as the working piston. When one piston moves upwards, the other moves downwards, providing the isochoric displacement of the air in the engine. Both piston together function as the working piston; both move upwards or downwards together corresponding with the changing air pressure in the engine. This causes the water level in the third tube, the tuning or output tube, to move up and down. Natural frequency of the water columns The two liquid piston are connected are connected at the bottom, making a U shaped tube.
Solutions Because of this it is hard to make a properly functioning fluidyne stirling engine, and keep it running. Alpha type fluidyne stirling engine 1. 2. 3. 4. 1. 2. Test 1. Lineair Fluidyne Stirling engine - ProtoSpace Wiki. From ProtoSpace Wiki The lineair fluidyne stirling engine is a version of the U-tube fluidyne stirling engine where the natural frequency of the water tube wouldn't have a big influence on the functioning of the engine. This version has only one piston, connected to the hot chamber. The cold chamber would have to be placed in line with the hot chamber, and will then be closed off at the end.
Hypotheses about the functioning of the lineair fluidyne stirling engine. Schematic drawing of the design of the functioning prototype To see wether a stirling engine would be able to function in a lineair setup, several prototypes were made. Testing setup of the functioning prototype In that case the process of the engine would probably be as follows. Most probably the engine functions based on both principles. If this turns out to be true, several adjustments can be made to the lineair stirling engine. First of all this can be done by simple extending the tube. Testing Prototype 1 The Prototype The test.