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Applications Of The Stirling Engine
Applications of the Stirling engine range from mechanical propulsion to heating and cooling to electrical generation systems. A Stirling engine is a heat engine operating by cyclic compression and expansion of air or other gas, the "working fluid", at different temperature levels such that there is a net conversion of heat to mechanical work. The Stirling cycle heat engine can also be driven in reverse, using a mechanical energy input to drive heat transfer in a reversed direction (i.e. a heat pump, or refrigerator). There are several design configurations for Stirling engines that can be built (many of which require rotary or sliding seals) which can introduce difficult tradeoffs between frictional losses and refrigerant leakage. A free-piston variant of the Stirling engine can be built, which can be completely hermetically sealed, reducing friction losses and completely eliminating refrigerant leakage. For example, a Free Piston Stirling Cooler (FPSC) can convert an electrical e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stirling Engine
A Stirling engine is a heat engine that is operated by the cyclic compression and expansion of air or other gas (the ''working fluid'') between different temperatures, resulting in a net conversion of heat energy to mechanical work. More specifically, the Stirling engine is a closed-cycle regenerative heat engine with a permanent gaseous working fluid. ''Closed-cycle'', in this context, means a thermodynamic system in which the working fluid is permanently contained within the system, and ''regenerative'' describes the use of a specific type of internal heat exchanger and thermal store, known as the ''regenerator''. Strictly speaking, the inclusion of the regenerator is what differentiates a Stirling engine from other closed-cycle hot air engines. In the Stirling engine, a gas is heated and expanded by energy supplied from outside the engine's interior space (cylinder). It is then shunted to a different location within the engine, where it is cooled and compressed. A piston (o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Motors
American Motors Corporation (AMC; commonly referred to as American Motors) was an American automobile manufacturing company formed by the merger of Nash-Kelvinator Corporation and Hudson Motor Car Company on May 1, 1954. At the time, it was the largest corporate merger in U.S. history. American Motors' most similar competitors were those automakers that held similar annual sales levels such as Studebaker, Packard, Kaiser Motors, and Willys-Overland. Their largest competitors were the Big Three— Ford, General Motors, and Chrysler. American Motors' production line included small cars - the Rambler American which began as the Nash Rambler in 1950, Hornet, Gremlin, and Pacer; intermediate and full-sized cars, including the Ambassador, Rambler Classic, Rebel, and Matador; muscle cars, including the Marlin, AMX and Javelin; and early four-wheel drive variants of the Eagle and the Jeep Wagoneer, the first true crossovers in the U.S. market. Regarded as "a small company deft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hybrid Vehicle
A hybrid vehicle is one that uses two or more distinct types of power, such as submarines that use diesel when surfaced and batteries when submerged. Other means to store energy include pressurized fluid in hydraulic hybrids. The basic principle with hybrid vehicles is that the different motors work better at different speeds; the electric motor is more efficient at producing torque, or turning power, and the combustion engine is better for maintaining high speed than a typical electric motor. Switching from one to the other at the proper time while speeding up yields a win-win in terms of energy efficiency, such that it translates into greater fuel efficiency. Vehicle types Two-wheeled and cycle-type vehicles Mopeds, electric bicycles, and even electric kick scooters are a simple form of a hybrid, powered by an internal combustion engine or electric motor and the rider's muscles. Early prototype motorcycles in the late 19th century used the same principle. * In a parall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Notchback
A notchback is a design of a car with the rearmost section that is distinct from the passenger compartment and where the back of the passenger compartment is at an angle to the top of what is typically the rear baggage compartment. Notchback cars have "a trunk whose lid forms a distinct deck." In profile view, the body has a step down from the roof with a downward inclined passenger compartment's rear window to meet an almost horizontal trunk lid extending to the rear of the car. The category may be characterized as having a three-box design where the trunk volume is less pronounced than the engine and passenger compartments. Many models of sedans, coupés, or hatchbacks could be classified as notchbacks. However, the category has limited salience outside of American car manufacturers distinguishing the three-box models from other body styles in the same model range. For example, the Chevrolet Vega range included both a notchback coupe and a fastback coupe. North America One ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chevrolet Celebrity
The Chevrolet Celebrity is a mid-size automobile that was produced by the Chevrolet division of General Motors from the 1982 to 1990 model years. Replacing the Malibu, the Celebrity was initially slotted between the Citation and the Impala within the Chevrolet model line, eventually marketed between the Corsica and Caprice sedans. The Celebrity marked the transition of the GM A platform to front-wheel drive and was among a quartet of GM mid-size vehicles produced on the architecture. Sharing its roofline with the Buick Century, the Celebrity also shared design commonality with the Oldsmobile Cutlass Ciera/Cutlass Cruiser, and the Pontiac 6000. After a single generation of the model line was produced, the Celebrity sedan was discontinued after the 1989 model year and replaced by the Lumina; the Celebrity station wagon was replaced by the Lumina APV minivan after 1990. Model overview Introduced in January 1982, the Chevrolet Celebrity was offered in two-door and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thermal Efficiency
In thermodynamics, the thermal efficiency (\eta_) is a dimensionless performance measure of a device that uses thermal energy, such as an internal combustion engine, steam turbine, steam engine, boiler, furnace, refrigerator, ACs etc. For a heat engine, thermal efficiency is the ratio of the net work output to the heat input; in the case of a heat pump, thermal efficiency (known as the ''coefficient of performance'') is the ratio of net heat output (for heating), or the net heat removed (for cooling) to the energy input (external work). The efficiency of a heat engine is fractional as the output is always less than the input while the COP of a heat pump is more than 1. These values are further restricted by the Carnot theorem. Overview In general, energy conversion efficiency is the ratio between the useful output of a device and the input, in energy terms. For thermal efficiency, the input, Q_, to the device is heat, or the heat-content of a fuel that is consumed. The des ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mass Production
Mass production, also known as flow production or continuous production, is the production of substantial amounts of standardized products in a constant flow, including and especially on assembly lines. Together with job production and batch production, it is one of the three main production methods. The term ''mass production'' was popularized by a 1926 article in the ''Encyclopædia Britannica'' supplement that was written based on correspondence with Ford Motor Company. ''The New York Times'' used the term in the title of an article that appeared before publication of the ''Britannica'' article. The concepts of mass production are applied to various kinds of products: from fluids and particulates handled in bulk (food, fuel, chemicals and mined minerals), to parts and assemblies of parts (household appliances and automobiles). Some mass production techniques, such as standardized sizes and production lines, predate the Industrial Revolution by many centuries; however, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AMC Concord
The AMC Concord is a compact car manufactured and marketed by the American Motors Corporation for model years 1978–1983. The Concord was essentially a revision of the AMC Hornet that was discontinued after 1977, but more luxurious, quieter, roomier, and smoother-riding than the series it replaced. It was offered in four-door sedan, two-door coupé (through 1982), three-door hatchback (through 1979), and five-door station wagon configurations. The Concord was AMC's volume seller from the time it appeared until the introduction of the Renault Alliance. The car was available as a sports-oriented two-door hatchback AMX model without any "Concord" badges or identification for the 1978 model year, as well as the Concord Sundancer convertible during 1981 and 1982, an authorized conversion sold through AMC dealers. Vehiculos Automotores Mexicanos (VAM) assembled and marketed modified Concord versions in Mexico as the VAM American, including a unique VAM Lerma model. An electric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Opel
Opel Automobile GmbH (), usually shortened to Opel, is a German automobile manufacturer which has been a subsidiary of Stellantis since 16 January 2021. It was owned by the American automaker General Motors from 1929 until 2017 and the PSA Group, a predecessor of Stellantis, from 2017 until 2021. Opel vehicles are sold in the United Kingdom as Vauxhall Motors, Vauxhall. Some Opel vehicles were badge engineering, badge-engineered in Australia under the Holden brand until 2020 and in North America and China under the Buick, Saturn Corporation, Saturn, and Cadillac brands. Opel traces its roots to a sewing machine manufacturer founded by Adam Opel in 1862 in Rüsselsheim am Main. The company began manufacturing bicycles in 1886 and produced its first automobile in 1899. With the Opel RAK program, the world's first rocket program, under the leadership of Fritz von Opel, the company played an important role in the history of aviation and spaceflight: Various land speed records were a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
VAM Lerma
The VAM Lerma is an automobile that was designed and manufactured by Vehiculos Automotores Mexicanos from 1981 to 1983. The Lerma shared parts with other vehicles by VAM's license partner American Motors (AMC) to reduce manufacturing costs. It was VAM's top-of-the-line flagship model after the discontinuation of the Classic (Matador) line in 1976. The VAM Lerma was unusual in offering a hatchback design focused at the top-end luxury market. The model was an indirect replacement of the VAM Classic and to some extent the VAM Pacer lines. History The name for the cars was taken from Lerma, a city in the state of Mexico, where VAM engines were manufactured.José Luis Alarcón Vela. "Érase ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AMC Spirit
The AMC Spirit is a subcompact car, subcompact marketed by American Motors Corporation (AMC) from 1979 until 1983 as a Facelift (automobile), restyled replacement for the AMC Gremlin, Gremlin. The Spirit shared the Gremlin's Automobile platform, platform and was offered in two hatchback variations, each with two doors – marketed as ''sedan'' and ''liftback''. Manufactured by AMC in Wisconsin and Ontario, as well as under license in Mexico, the Spirit was also marketed from 1981 through 1983 model years as the AMC Eagle, Eagle SX/4 with four-wheel drive. Performance versions of the AMC Spirit competed in road racing. The Goodrich Corporation, B.F. Goodrich tire company-sponsored a two-car team of Spirit AMXs in the 24 Hours Nürburgring race track. The AMXs were the first American entries and they finished first and second in their class out of a 120-car field in this grueling , 176 turn road racing, road race. AMC Spirits were also privately campaigned in International Mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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