Forklift Engine - An engine, also called a motor, is a device that changes energy into useful mechanical motion. Motors that transform heat energy into motion are referred to as engines. Engines are available in many types like for example internal and external combustion. An internal combustion engine normally burns a fuel using air and the resulting hot gases are utilized for generating power. Steam engines are an illustration of external combustion engines. They utilize heat to generate motion making use of a separate working fluid.
The electric motor takes electrical energy and generates mechanical motion via varying electromagnetic fields. This is a typical kind of motor. Various kinds of motors function by non-combustive chemical reactions, other types can make use of springs and be driven by elastic energy. Pneumatic motors function through compressed air. There are various designs depending upon the application needed.
Internal combustion engines or ICEs
An internal combustion engine occurs when the combustion of fuel combines together with an oxidizer in a combustion chamber. In an internal combustion engine, the increase of high pressure gases combined with high temperatures results in applying direct force to some engine parts, for example, pistons, turbine blades or nozzles. This force generates useful mechanical energy by means of moving the component over a distance. Normally, an internal combustion engine has intermittent combustion as seen in the popular 2- and 4-stroke piston engines and the Wankel rotating motor. Nearly all rocket engines, jet engines and gas turbines fall into a second class of internal combustion motors referred to as continuous combustion, which occurs on the same previous principal described.
Stirling external combustion engines or steam engines greatly differ from internal combustion engines. The external combustion engine, where energy is to be delivered to a working fluid like for instance liquid sodium, pressurized water, hot water or air that is heated in a boiler of some type. The working fluid is not mixed with, comprising or contaminated by combustion products.
The models of ICEs accessible today come along with various weaknesses and strengths. An internal combustion engine powered by an energy dense fuel will deliver efficient power-to-weight ratio. Even though ICEs have been successful in a lot of stationary applications, their real strength lies in mobile applications. Internal combustion engines control the power supply meant for vehicles like for instance aircraft, cars, and boats. Some hand-held power gadgets utilize either battery power or ICE equipments.
External combustion engines
An external combustion engine utilizes a heat engine where a working fluid, like for instance steam in steam engine or gas in a Stirling engine, is heated through combustion of an external source. This combustion takes place through a heat exchanger or via the engine wall. The fluid expands and acts upon the engine mechanism that generates motion. Then, the fluid is cooled, and either compressed and reused or discarded, and cool fluid is pulled in.
Burning fuel with the aid of an oxidizer to supply the heat is referred to as "combustion." External thermal engines can be of similar application and configuration but utilize a heat supply from sources such as nuclear, exothermic, geothermal or solar reactions not involving combustion.
The working fluid could be of any constitution. Gas is the most common kind of working fluid, yet single-phase liquid is occasionally used. In Organic Rankine Cycle or in the case of the steam engine, the working fluid changes phases between gas and liquid.
Click to Download the pdf