{"product_id":"hot-water-stirling-engine","title":"Hot Water Stirling Engine","description":"\u003ch3\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cem\u003eTurn a cup of hot water into a working heat engine\u003c\/em\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Hot Water Stirling Engine is a tabletop thermodynamic model that runs on nothing more than the temperature difference between a cup of hot water and the cooler air above it. Place the engine on a mug of hot water, give the flywheel a gentle push, and students watch a real heat engine convert thermal energy into continuous mechanical motion — no fuel, no batteries, no flames.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Teachers Love It\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRuns on Classroom-Safe Hot Water\u003c\/strong\u003e – No open flames, no alcohol burner, no pressurized steam. Hot tap water or coffee is all it takes, making this safe and practical for demos at any grade level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisible Piston Motion Teaches the Cycle\u003c\/strong\u003e – The transparent chamber lets students observe the displacer piston as it moves through compression and expansion, connecting the physical mechanism to the thermodynamic P–V diagram.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Difference Is the Variable\u003c\/strong\u003e – As the water cools, the engine slows, giving students a live demonstration that engine output depends directly on the temperature gradient, which is a core concept of thermodynamics and the Carnot limit.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Arbor Scientific","offers":[{"title":"Default Title","offer_id":55671358095433,"sku":"96-7110","price":45.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0030\/6207\/1369\/files\/96-7110HotWaterStirlingEngine2048x2048.jpg?v=1782234733","url":"https:\/\/www.arborsci.com\/products\/hot-water-stirling-engine","provider":"Arbor Scientific","version":"1.0","type":"link"}