There are various kinds of engines from which mechanical work is obtained by the expenditure of heat, la the gas engine a mixture of gas and air is burned in the cylinder, the heat thus generated being converted into work by the expansion of the products of combustion. The action in oil and hot-air engines is very similar. The most important of all heat engines, however, is the steam engine, in which the heat in steam is transformed into work. It will be useful to review briefly some of the stages through which it has passed in its development. The first steam engines of which we have any knowledge were described by Hero of A lexandria, in a book written two centuries before Christ. Some of them were very ingenious, but the best were little more than toys. From the time of Hero until the seventeenth century there was very little progress. At this time there began to be great need of steam pumps to remove water from the coal mines. In 1615, Salomon deC aus devised the following arrangement. A vessel, having a pipe leading from the bottom, was filled with water and then closed. Heat applied to the vessel caused steam to be formed, which forced the water through the pipe. A little later an engine was constructed in the form of a steam turbine; but it was unsuccessful, and the attention of inventors was again turned to pumps. Finally Thomas Savery completed, in 1693, the first commercially successful steam engine. It waa very wasteful of steam as compared with our engines of today, but as being the first engine to accomplish its task it was a grand success. Savery sengine (F ig. 1) consisted of two oval vessels placed side by side and in communication with a boiler. The lower parts were connected by tubes fitted with suitable valves. Steam from the boiler was admitted to one of the vessels and the air driven out.
(Typographical errors above are due to OCR software and don't occur in the book.)
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PAP. Etat : New. New Book. Shipped from UK. Established seller since 2000. N° de réf. du vendeur LW-9781440067556
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Paperback. Etat : New. Print on Demand. This book takes readers on a fascinating journey through the history and inner workings of the steam engine. Beginning with early, rudimentary designs, the author traces the evolution of this transformative technology, highlighting pivotal inventions that propelled its development. From the pioneering work of Savery and Newcomen to the groundbreaking contributions of James Watt, the book delves into the technological and scientific advancements that revolutionized the steam engine's efficiency and power. The text explores the intricate components of steam engines, offering a detailed and accessible guide to their construction, operation, and maintenance. Readers will gain a comprehensive understanding of various engine types, including simple, compound, triple, and quadruple expansion engines, as well as horizontal, vertical, and marine engines. The book examines the fundamental principles of thermodynamics as they apply to steam engines, exploring concepts like heat measurement, expansion of gases, and the advantages of condensers. The author concludes by analyzing the steam turbine, a later development that further transformed the use of steam power. This book provides a valuable resource for anyone seeking a thorough and engaging exploration of this vital technology that continues to shape our world. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. N° de réf. du vendeur 9781440067556_0
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