The steam engine is an engine that used the expansion and condensation of steam to perform mechanical work. Steam power was used for many applications including manufacturing and transport. Steam power was eventually overtaken by the internal combustion engine and electricity.
Steam engines use the expansion and condensation of steam to move. Steam power has been used in many areas throughout history.
The earliest recorded steam engine design was by Hero of Alexandria. He designed a device that spun when it was heated. Although it was designed to be a novelty, he showed that steam could be used to make something move. Steam power was first used to pump water from mines. Thomas Savery built the first commercial example, which he patented in 1698. A few years later, Thomas Newcomen created another more efficient water pump. In 1712, he created the world’s first atmospheric steam engine which he installed at a coal mine in England. At the time of Newcomen’s death, 100 of his engines were installed.
Scottish Engineer James Watt improved on Newcomen’s early models by adding a separate condenser. Watt created an engine that used less coal than previous engines. The Watt engine was still an atmospheric engine, which limited its power. The next major improvement came with Richard Trevithick's high pressure engines. Unlike Watt and Newcomen’s atmospheric engines, Trevithick’s engines used steam to power the engine, not just to create a vacuum. These engines were more efficient and had many more uses.
Up until this point, most factories were relying on power from water wheels, which meant they had to be close to a river. Steam engines made it possible to build factories away from rivers. Steam engines could be used to run factory machinery at a much higher rate. Steam engines were also used for transportation. The first locomotive was built by Trevithick and was constructed for Coalbrookdale Ironworks in the UK. Steamboats and steam trains allowed people to travel further and faster than ever before.
Steam technology was replaced by diesel and petrol internal combustion engines, as they are more efficient and are able to work longer. Steam turbines are still used in many countries as a method for generating electricity.
Navodila za izum parnega stroja
Kako poučevati učence o vplivu parnega stroja z uporabo praktičnih dejavnosti
Začnite z uvodom v parni stroj in njegovo pomembnost v zgodovini. Uporabite slike in preproste modele, da učencem pomagate vizualizirati, kako delujejo parni stroji in kako so spremenili prevoz in industrijo.
Ustvarite preprost model parnega stroja s vsakdanjimi učnimi materiali
Zberite predmete, kot so baloni, slamice in steklenice, da zgradite osnovno demonstracijo parnega stroja. Vodite učence pri sestavljanju delov in opazujte, kako toplota lahko povzroči gibanje, kar krepi načelo parne moči.
Organizirajte dejavnost časovne premice za raziskovanje vloge parnega stroja v zgodovini
Dodelite učencem raziskovanje ključnih dogodkov, povezanih s parnim strojem. Naj jih razporedijo na časovni premici v razredu, s poudarkom na tem, kako je parna moč vplivala na prevoz, tovarne in vsakdanje življenje.
Organizirajte razredno razpravo o tem, kako je parni stroj spremenil družbo
Spodbujajte učence, naj delijo ideje, kako je parni stroj vplival na zaposlovanje, potovanja in komunikacijo. Vodite razpravo z vprašanji, ki spodbujajo kritično mišljenje in povezovanje zgodovine z sodobno tehnologijo.
Dodelite ustvarjalni projekt o izumiteljih in inovacijah povezanih s parnimi stroji
Prosite učence, naj izberejo znanega izumitelja parnega stroja ali povezano inovacijo. Naj ustvarijo plakate ali kratke predstavitve za delitev z razredom, spodbujajoč raziskovalne veščine in globlje razumevanje tehnološkega napredka.
Pogosto zastavljena vprašanja o izumu parnega stroja
Kaj je parni stroj?
Parni stroj je stroj, ki uporablja paro iz vrenja vode za ustvarjanje pogona in gibanja. Bil je pomemben izum za transport in industrijo v 18. in 19. stoletju.
Kako deluje parni stroj?
Parni stroj deluje tako, da segreva vodo v kotlu, da proizvede paro. Para se širi in potiska pistolete ali vrti turbino, kar ustvarja gibanje ali mehansko energijo.
Kdo je izumil parni stroj?
James Watt je izboljšal parni stroj konec 18. stoletja, zaradi česar je bil učinkovitejši, vendar so ga prej ustvarili izumitelji, kot sta Thomas Newcomen in Thomas Savery.
Zakaj je bil parni stroj pomemben v zgodovini?
Parni stroj je poganjal tovarne, vlake in ladje, kar je pripomoglo k začetku Industrijske revolucije. Spremenil je način izdelave in prevoza blaga, kar je privedlo do velikih tehnoloških in družbenih napredkov.
Kateri so nekateri vsakdanji primeri uporabe parnih strojev?
Parni stroji so bili uporabljeni v vlakih, parnikih in tovarnah. Nekatere stare parne naprave in stroji so še danes vidni v muzejih.
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