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DEFINITION AND NOMENCLATURE A Stirling engine is a mechanical device which operates on a closed regenerative thermodynamic cycle with cyclic compression and expansion of the working fluid at different temperature levels. The flow of working fluid is controlled only by the internal volume changes, there are no valves and, overall, there is a net conversion of heat to work or vice-versa. This generalized definition embraces a large family of machines with different functions; characteristics and configurations. It includes both rotary and reciprocating systems utilizing mechanisms of varying complexity. It covers machines capable of operating as a prime mover or power system converting heat supplied at high tempera ture to output work and waste heat at a lower temperature. It also covers work-consuming machines used as refrigerating systems and heat pumps abstracting heat from a low temperature source and delivering this plus the heat equivalent of the work consumed to a higher tem perature. Finally it covers work-consuming devices used as pressure generators compressing a fluid from a low pressure to a higher pres sure. Very similar machines exist which operate on an open regen erative cycle where the flow of working fluid is controlled by valves. For convenience these may be called Ericsson engines but unfortunate ly the distinction is not widely established and regenerative machines of both types are frequently called 'Stirling engines'.
A full-color introduction to the engines that power our world, packed with STEM activities and text-to-world connections that invite kids ages 7 to 10 to discovery the wonderful world of engines and motors From ancient times to now, engines have powered the activities of people's lives. Engines With Science Projects for Kids invites readers ages 7 to 10 to explore engines through hands-on STEM projects that deepen their understanding of engines, what makes them hum, and all the special jobs they do for humans. - Learn about heat engines that power everything from trains to cars to planes to nuclear power plants. - Explore electric motors and the magnetism that makes them run. - Discover pneumatic motors that power tools and torpedoes, working with air squeezed under pressure. - Learn about hydraulic motors with fluids under pressure that power things like cranes, lawn trimmers, garbage disposals, and drilling rigs. - Study clockwork motors powered by a spiral spring and gears that move watches, wind-up toys, and music boxes. - Interact with engaging text that's reinforced with 25 hands-on, science-minded projects, including building a catapult, a milk-carton conveyor belt, and a magnet-powered car, while fascinating trivia, essential questions, links to online resources, text-to-world connections, and even jokes help support deeper learning About the Explore Your World series and Nomad Press Nomad Press books in the Explore Your World series integrate content with participation, encouraging readers to engage in student-directed learning. Combining content with inquiry-based projects stimulates learning and makes it active and alive. Nomad's unique approach simultaneously grounds kids in factual knowledge while allowing them the space to be curious, creative, and critical thinkers. All books are leveled for Guided Reading level and Lexile and align with Common Core State Standards and Next Generation Science Standards. All titles are available in paperback, hardcover, and ebook formats.
A narrative like no other: a cultural history that explores how cars have both propelled and reflected the American experience— from the Model T to the Prius. From the assembly lines of Henry Ford to the open roads of Route 66, from the lore of Jack Kerouac to the sex appeal of the Hot Rod, America’s history is a vehicular history—an idea brought brilliantly to life in this major work by Pulitzer Prize–winning journalist Paul Ingrassia. Ingrassia offers a wondrous epic in fifteen automobiles, including the Corvette, the Beetle, and the Chevy Corvair, as well as the personalities and tales behind them: Robert McNamara’s unlikely role in Lee Iacocca’s Mustang, John Z. DeLorean’s Pontiac GTO , Henry Ford’s Model T, as well as Honda’s Accord, the BMW 3 Series, and the Jeep, among others. Through these cars and these characters, Ingrassia shows how the car has expressed the particularly American tension between the lure of freedom and the obligations of utility. He also takes us through the rise of American manufacturing, the suburbanization of the country, the birth of the hippie and the yuppie, the emancipation of women, and many more fateful episodes and eras, including the car’s unintended consequences: trial lawyers, energy crises, and urban sprawl. Narrative history of the highest caliber, Engines of Change is an entirely edifying new way to look at the American story.
This text, by a leading authority in the field, presents a fundamental and factual development of the science and engineering underlying the design of combustion engines and turbines. An extensive illustration program supports the concepts and theories discussed.