Stirling engine stirling engines into three distinct types. Design and fabrication of regenerative heat exchanger for. The main driving force behind designing and producing the stirling engine was. The grabcad library offers millions of free cad designs, cad files, and 3d models. Gammatype engine which is cheaper and simple in fabrication. Several designs were studied before settling on an alpha type configuration based around a twocylinder air compressor. This software is a design program geared to helping you design the various components of a stirling engine for maximum power and efficiency. There are three basic types of stirling heat engines. We have decided to design and fabricate this type of stirling engine which works with waste heat as input. The modern stirling engine is a clean and efficient engine. I created stirling engine software to help designers and enthusiasts build highpower stirling engines. Stirling engine simulator simulate, analyze, design, build. Validation of a stirling engine thermodynamic simulation program. Alpha stirling engine drawings stirling engine, engineering.
We decided to manufacture a stirling engine having ratio was calculated for the cylinders and the piston. I am currently trying to build an alpha type stirling engine, and i have been scourging the web for answers and tips on optimizing power. A computer simulation of two piston stirling engine. Stirling engine home page academic edition englishthe stirling engine was invented in 1816, before the gasoline and diesel engines. The aim of this project was to design, build, and test a stirling engine capable of generating between 200500 watts of electricity. Themomental volumes is described with a crank angle x. Most of the studies were focused on betatype stirling engine because of its higher power density. The pistons and flywheels are driven by nothing more than the heat from four tealights. This web site offers academic information for the stirling engine. Freepiston stirling engines fpses have recently attracted attention as a promising energy conversion technology because of their desirable characteristics such as high efficiency, high reliability, and easy and quiet operation. The first type im going to talk about is the alpha stirling engine.
Alphatype stirling engine figure 1 shows the calculation model of alphatype stirling engine. Alpha stirling engine an alpha stirling contains two power pistons in separate cylinders, one hot and one cold. We decided to manufacture a stirling engine having 49cc displacement capacity and accordingly the ld ratio was calculated for the cylinders and the piston. Stirling engine mqp worcester polytechnic institute. Design of a stirling engine for electricity generation. Nov 26, 20 this engine has been built with parts removed from old hard drives, vcrs, or frequently used, such as coins, washers, screws, sheet iron, copper pipes, etc the pistons are made with glass. It has a higher efficiency than the other two types of engines so it is typically used more often. Computer program for stirling engine performance calculations. Backround history functional stirling types applications shop engineers classify stirling engines into three distinct types. The stirling is a very simple engine, and was often billed as a safe alternative to steam, since theres no risk of a boiler explosion. What is stirling engine types, main parts, working and. The program only models alpha engines with two pistons, and betagamma engines with one.
The engine consists of a crankcase with two pistons positioned at a phase angle of 90. Also, to help you understand the different types of stirling engines and how they work. This crank angle is defined as x0 when the expansion piston is located the most top. We need to base this lab around the fact that we can create this stirling engine out of really basic. How to make diy stirling engines plans, heat engine cycle basics and many homemade examples. Stirling engine efficiency the potential efficiency of a stirling engine is high. Stirling coolers and some power producing engines use this configuration. This is because the heat driving the pistons is supplied from outside the engine and transferred through heat exchangers to the piston volumes. The alpha type stirling engine ase was chosen and studied. This web resource is intended to be totally self contained learning resource for the analysis and development of computer simulation of single phase, pistoncylinder stirling cycle machines. The stirling engine can use any type of fuel, as well as solar energy and hot spring heat.
An alpha type stirling engine of two pistons, two cylinders type is theoretically explained. Design of a solar stirling engine for marine and offs hore applications 11. Bachelors thesis automation engineering valkeakoski. Beale 1928 2016, inventor of the free piston stirling engine, mentor and friend. In this section we wish to develop the sinusoidal volume relations vc. The alphatype stirling engine ase was chosen and studied. Design and fabrication of model stirling engine freelancer. Doc new design of alpha type stirling engine design and.
Therefore there are only a few studies conducted with. This learning resource includes a set of tutorial matlab computer program modules for simulating specific stirling engine configurations. In this study we present the results of a stirling engine simulation, part of a. The beta engine has only one cylinder which is heated at one end and cooled at the other. Designing stirling engine heat exchangers is a balance between high heat transfer with low viscous. Design of alpha stirling engine in conjunction with solar concentrator. Animated illustration and description of the alpha configuration stirling engine. The alpha engine is a two cylinder engine with two different pistons. The stirling engine was first developed in the early 1800s by robert stirling in an attempt to compete with the steam engine. The stirling engine used in this study is the v alphatype stirling engine reported by karabulut et al. Each configuration runs on the same thermodynamic cycle but has different mechanical design characteristics 2.
International journal of engineering research and general. Stirling engine software real world physics problems. The alpha type engine relies on interconnecting the power pistons of multiple cylinders to move the working gas, with the cylinders held at different temperatures. Stirling engine but have probably never tried to teach it to a group of high school seniors or juniors before, so we would have to make sure the language and explanation of concepts agreed with the student and teachers education level. This modelling was carried out using the matlabsimulink software. However, beginning about 1860, smaller engines of the stirlinghot air type were produced in. Modelling and parametric study of an efficient alpha type. This type of engine has a high powertovolume ratio but has technical problems due. Errat doenasa104042 errata computer program for stirling engine performance calculations roy c. After finalizing the dimensions of each and every component of the engine, a cad model of a alpha configuration of. The doe stirling engine highway vehicle systems program is. In this study we introduce the stirling engine with a variety of applications, advantages and disadvantages of them, the thermodynamic model isothermal and adiabatic states are investigated analytically and of its results, for the dynamic analysis. I also animated the engine to show the client how it would work.
Work per unit mass of working fluid delivered by an ideal stirling engine per revolution cycle its important to keep in mind that all these numbers presented are for the ideal stirling cycle, which will never exist in real life, all real engines are approximations of the ideal thermodynamic cycles. This type has two separate cylinders, one that is heated and one that is cooled, attached together by a pipe behind the piston. The client wanted me to design a small scale model of an alpha type stirling engine and fabricate it. Those designing alpha type engine will need to do their own math, or perhaps ill post a future article specifically.
The stirling engine or stirling s air engine as it was known at the time was invented and patented in 1816. The complete set of mfiles can be downloaded in compressed format sea. This engine design has been used in a lot of experiments including solar power experiments for green energy. For this dynamic modelling of the alpha type stirling engine, we use the.
One of the most efficient stirling engines ever made was the mod ii automotive engine, produced in the 1980. Design of a solar stirling engine for marine and offshore applications. I used two 10ml glass syringes and i sanded the plungers with grit sandpaper just a little. The stirling engine or stirlings air engine as it was known at the time was invented and patented in 1816. International journal of engineering research and general science volume 2, issue 3, aprilmay 2014. For alphaconfiguration, it has two pistons positioned in separate cylinders, which are connected in. Fpse are truly a closed cycle system that works using variations in the internal pressure to drive the power piston that is connected to the reciprocating magnets in. At the time, the stirling engine proved to be more attractive than its steam counterpart for various reasons. Stirling cycle machine analysis updated 3212016 ohio university. Stirling engine software for designing high power stirling engines. The stirling hot air engine is a simple type of engine that uses a compressible fluid as the working fluid. After finalizing the dimensions of each and every component of the engine, a cad model of a alpha configuration of stirling engine was developed on creo software. This software is a design program geared to helping you design the various components of a. Stirling engine design program isothermal second order calculation developped from the fortran program, written by william r.
After research i made a mathematical model of the engine and designed individual parts using proengineer. The figure to the right shows an alpha type stilring engine, which was designed to use a model boat. The stirling engine beta configuration the thermodynamics of the stirling beta engine are similar to those of the alpha engine but the physical configuration is quite different. These modules can be augmented and adapted as required to simulate a specific engine design. January 1983 the attached tables vii, viii, and ix should be included in the report. Martini hover mouse over a text, a button or a diagram for detailed information. There are plenty more of these beautiful machines on joss website, and.
It is comparable to the efficiency of a diesel engine, but is significantly higher than that of a sparkignition gasoline engine. It is the type of stirling engine in which a single cylinder is used which is equipped with the heat source at the one end and a cooling device at the another end. Its a perfect demonstration of the engines stunning efficiency. Looking for downloadable 3d printing models, designs, and cad files. Stirling engine cycle efficiency 2 2 stirling engine a stirling engine is a heat engine which was invented by robert stirling in 1918. A graphical model of the engine is developed and then the various cycles of this engine are briefly elaborated. Then, the heat exchangers and the regenerator efficiencies as a function of fluid flow rates are added. This engine has been built with parts removed from old hard drives, vcrs, or frequently used, such as coins, washers, screws, sheet iron, copper pipes, etc the pistons are made with glass.
Jan 03, 2018 alpha stirling engine is the low power engine and is used for light load applications. The volumes of the expansion and compression cylinder at a given crank angle are determined at first. Our interest in this type of engine was established in 2002 when we started in the workshop of dichep, department of chemical and process engineering, faculty of engineering, in genoa where the design and construction of a first prototype of a external combustion engine type, the stirling engine. One of the most efficient stirling engines ever made was the mod ii. Stirling engine with rotary displacer gamma type configuration is a rare topic. This information is here to help you make better decisions when choosing your diy stirling engine project. The hot cylinder is situated inside the high temperature heat exchanger and the cold cylinder is situated inside the low temperature heat exchanger. For alpha configuration, it has two pistons positioned in separate cylinders, which are connected in. This paper presents a computer simulation of two piston stirling engine in two piston stirling engine simulator software by jlb enterprises and the influence of the phase angle on the operating. The efficiency is proved to be maximum 50% of its theoretical efficiency unlike other engines. Pdf design of a solar stirling engine for marine and. Design of alpha stirling engine in conjunction with solar.
Background info the cold piston is 60 celsius, and the hot piston is 160 degrees celsius. Join the grabcad community today to gain access and download. The engine uses an external heat source in contrast with combust engines so there is no explosion inside the cylinder while working. Though it is not a free piston type engine, the gpu3, it is one of the most documented stirling engine and its data are therefore used to compare the model results to the experimental ones.
The positive thing about this type of design is that its easy to separate the hot parts from the cold parts. In a consideration of the stability of the boat, it is better selection to have lower position of the centerofgravity. A stirling engine is a heat engine that is operated by a cyclic compression and expansion of air. These parts were them assembled using the same software. It followed earlier attempts at making an air engine but was probably the first put to practical use when, in 1818, an engine built by stirling was employed pumping water in a quarry. The alpha type engine is the simplest of all three types in that there are two pistons, each independently controlling the respective working space. The computer simulation program modules originally written in fortran have all been.
1320 1157 1474 1542 1314 579 249 265 482 1405 1486 1185 181 205 1593 899 745 1616 1307 1384 359 68 272 1257 813 1303 1087 206 952 321 682 288 291 1349 1208