The alternator is based around the bottom of a mm diameter tin can, so the stator outer circle is mm. A stirling engine to function as an electric generator.
Stirling engines work using the heat energy as the energy input and are based on the stirling cycle. Stirling, unfortunately died before he knew what he had discovered. The two pistons of the engine are exposed to a hot source and cold source, respectively. The stirling engine can use any type of fuel, as well as solar energy and hot spring heat.
When selecting stirling engine plans you need to decide if you're going to build a high skill level machined engine or just a tin can stove top model. Another small, flame powered engine fire eater recently designed for educational use. The stirling engine was invented in , before the gasoline and diesel engines. Cut the stainless bottle near its neck, i done it by using sharp pointed knife and hitting the knife with a hammer to puncture the bottle.
The stirling engine is a closed cycle heat engine. A horizontal stirling design and plans in metric dimensions designed by a person named coolegem. It's in german, i believe.
The schmidt theory is one of the isothermal calculation methods for stirling engines. Fluid flow is modulated by changing volumes within the engine. She is a true heirloom engine which will surely be handed down from generation to generation. We would like to express our gratitude towards Mr. Gokarna Bista for his technical advice and Mr. Suman Karki for assisting us during the fabrication of this system. Last but not the least, we would also like to thank our seniors, classmates and teachers who directly or indirectly helped us while doing this project.
This project also give rise to renewable energy, converting solar energy to the mechanical energy. By the end of the project we were able to design Gamma type stirling engine operating with solar power that gives an output power of 5. Pictorial view of solar powered stirling engine Schematic diagram of stirling engine operation Flowchart of project methodology Work schedule of project The resulting mechanical power is then used to run a generator or alternator to produce electricity.
Initially, Stirling engine was invented by Robert Stirling in the year [1]. It was created for a safer alternative to the steam engines, whose boilers often exploded due to the high steam pressures used and limitations of the primitive materials available at that time.
This Stirling engine was used back in the days as a rather low power water pumping engine from nineteenth century to before a more reliable internal combustion engine and electric motor replaced it. While in Roelf J. Meijer invented the solar powered Stirling engine.
It relates a heat engine with a solar dish collector in order to produce electricity. A second type of solar-powered Stirling engine was patented by NASA on August 3, which employed the use of solar energy in order to freely pump water from a river, lake, or stream. This apparatus consists of a large dish aimed at the sun to reflect the rays into the focus point, which is located at the center of the dish as shown in figure 1 [3].
Solar energy is then collected in the form of heat to fuel a Stirling cycle engine, which operates by letting heat flow from a hot source to a cold sink in order to do work. Typical operation is between and rpm depending on the temperature ratio. The controller requires an external power source for monitoring temperatures, starting the engine, and logging and displaying run data.
Today as a result of public concern about noise, air pollution and energy conservation there has in the recent years been increasing interest in Stirling engines micro combined heat and power units. Pictorial view of solar powered stirling engine 1. At that point, the heating part of the cylinder was placed. As the stirling engine is a closed cycle engine, cylinder is sealed with working fluids normally air, hydrogen or helium. It also consists of power piston which was tightly sealed and the displacer which is very loosely fitted so that air can move freely between the hot and cold sections of the engine.
Like most heat engines, stirling engine cycles through four main process: heating, expansion, cooling and compression [1]. This is accomplished by moving the gas back and forth between hot and cold end of the cylinder. As the hot end is in thermal contact with thermal energy from solar radiation and cold is in thermal contact with external heat sink. So, when the gas is on the hot side, it is heated so it expands and vice versa. As a result, difference in temperature arises between two ends of cylinder or at the extremities space of displacer causing a corresponding change in gas pressure between them, which results in the motion of the displacer causing the gas to alternatively expand and compress.
When the displacer is near the top of the cylinder, most of the gas is in the lower section and will be heated by the heat source and it expands. Also, when the displacer is near the bottom of the large cylinder; most of the gas is in the upper section and will cooled and contract causing the pressure to decrease. In both the cases, the displacer just moves the air back and forth from the hot side to the cold side but does not operate the crankshaft and the engine [4].
In other words, the connecting rod to the displacer could be a string in this engine and it would still work. Figure 2. Schematic diagram of stirling engine operation While expanding the increase in the pressure forces the piston up, powering the flywheel.
The turning of the flywheel then moves the displacer down. Also, while contracting the pressure decreases, which in turn moves the piston down, imparting more energy to the flywheel. Here, the power piston should ideally be 90 degrees out of phase with the displacer piston as shown in figure 2. The greater the temperature difference between the hot and cold sources, the greater the thermal efficiency.
The maximum theoretical efficiency is equivalent to that of the Carnot Cycle, but the efficiency of real engines is less than this value because of friction and other losses. We worked several weeks to accomplish our project within our time and budget. Following strategic approaches are followed to achieve our goal. These are plans for Stirling Engine of all sorts of configurations, some practical for putting to work, others, just tabletop demonstrators. Plans for Everything Mostly Free!
Home About Us Contact Us. Plans for Stirling Engines These are plans for Stirling Engine of all sorts of configurations, some practical for putting to work, others, just tabletop demonstrators. Image Description File Spec. Download Candle Engine: This interesting small sized flame eater operates off of a candle flame makes for a fascinating concept and strong running model. It's in German, I believe. It's dimensioned in inches and very well detailed.
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