{"product_id":"dr-johnsons-heat-engine","title":"Dr Johnson's Heat Engine","description":"\u003cmeta name=\"description\" content=\"Buy Dr Johnsons Heat Engine online in India at best price from The Engineer Store, Bengaluru. Authentic product, 7-day warranty on manufacturing defects, fast delivery across India.\"\u003e\n\u003ch1\u003eDr Johnson's Heat Engine - Thermodynamic Demonstration Model\u003c\/h1\u003e\n\u003cp\u003eBring thermodynamics to life with Dr Johnson's Heat Engine, a fascinating low-temperature differential engine that converts small heat differences into visible mechanical motion. Perfect for physics classrooms, science enthusiasts, and engineering demonstrations. Ships from Bengaluru with full support and warranty from The Engineer Store.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecification\u003c\/td\u003e\n\u003ctd\u003eValue\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine Type\u003c\/td\u003e\n\u003ctd\u003eLow-Temperature Differential Heat Engine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Principle\u003c\/td\u003e\n\u003ctd\u003eThermodynamic Cycle (Hot\/Cold Reservoir)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Temperature Differential\u003c\/td\u003e\n\u003ctd\u003e5 degreesC between heat source and ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Source Compatibility\u003c\/td\u003e\n\u003ctd\u003eWarm water, body heat, sunlight, warm surface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction Material\u003c\/td\u003e\n\u003ctd\u003eBorosilicate glass and metal components\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorking Fluid\u003c\/td\u003e\n\u003ctd\u003eEnclosed volatile liquid (diethyl ether based)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotion Type\u003c\/td\u003e\n\u003ctd\u003eContinuous rocking\/oscillating action\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eCompact desktop form factor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Required\u003c\/td\u003e\n\u003ctd\u003eNone (self-operating from ambient heat differential)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eEducational demonstration, desk display, science projects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWhy Choose This?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt to Last:\u003c\/strong\u003e Precision-crafted with borosilicate glass and quality metal fittings - far superior to flimsy novelty versions that leak or stop working within weeks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReal Thermodynamic Demonstration:\u003c\/strong\u003e Operates on genuine heat engine principles, making it an invaluable teaching tool for understanding energy conversion, entropy, and thermodynamic cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBengaluru-Based Support:\u003c\/strong\u003e Purchase with confidence from The Engineer Store - local customer service, fast domestic shipping, and hassle-free warranty support across India.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eProject Ideas\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermodynamics Lab Demo:\u003c\/strong\u003e Use the engine to visually demonstrate Carnot cycle principles, heat-to-work conversion, and energy efficiency concepts in classroom settings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolar Energy Experiment:\u003c\/strong\u003e Place the engine in direct sunlight and measure oscillation rates at different times of day to study solar thermal energy harvesting potential.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScience Fair Display:\u003c\/strong\u003e Build a complete exhibit around the heat engine explaining real-world applications of low-grade waste heat recovery in industrial processes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDr Johnson's Heat Engine (fully assembled, pre-filled)\u003c\/li\u003e\n\u003cli\u003eInstruction sheet with operating guidelines and safety information\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eHow does Dr Johnson's Heat Engine work?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eThe engine uses a volatile liquid sealed inside glass chambers. When one end is heated, the liquid evaporates and creates pressure that drives the rocking motion. As the mechanism cycles, the fluid condenses on the cooler side, and the process repeats continuously as long as a temperature differential exists.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhat heat sources can I use?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eA cup of warm water is the most common and effective heat source. You can also use body heat from your palm, direct sunlight, a warm laptop surface, or any object that maintains at least a 5 degreesC temperature difference from the ambient environment.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eIs this suitable for school and college labs?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes. Dr Johnson's Heat Engine is widely used in physics and engineering classrooms across India to demonstrate thermodynamic principles, making abstract concepts tangible and engaging for students of all levels.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eDoes it require batteries or electricity?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eNo. The engine is entirely self-powered, operating solely on the thermal energy from the temperature differential between its heat source and the surrounding air.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eHow long will the engine run continuously?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eThe engine runs indefinitely as long as a sufficient temperature differential is maintained. Remove the heat source and the engine gradually slows to a stop as thermal equilibrium is reached.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eIs the liquid inside safe?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eThe working fluid is permanently sealed within the glass body. Under normal use, there is no exposure risk. Handle the engine with care to avoid breakage, and keep it away from open flames as the internal fluid is flammable.\u003c\/p\u003e\u003c\/details\u003e\n\u003ch2\u003eBuy Dr Johnson's Heat Engine Online in India\u003c\/h2\u003e\n\u003cp\u003ePurchase the \u003cstrong\u003eDr Johnson's Heat Engine\u003c\/strong\u003e online at \u003ca href=\"https:\/\/theengineerstore.in\"\u003eThe Engineer Store\u003c\/a\u003e - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on \u003cstrong\u003eDr Johnson's Heat Engine\u003c\/strong\u003e with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.\u003c\/p\u003e\n\u003cp\u003eLooking to buy \u003cstrong\u003eDr Johnson's Heat Engine\u003c\/strong\u003e at the best price in India? The Engineer Store offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.\u003c\/p\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":43853738016931,"sku":"TES-EV02148","price":3938.96,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/4479\/7091\/products\/HeatEngineLG2_20copy-228x228.jpg?v=1704190775","url":"https:\/\/www.theengineerstore.in\/zh-hant\/products\/dr-johnsons-heat-engine","provider":"The Engineer Store","version":"1.0","type":"link"}