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2. Refrigerator - Wikipedia

   en.wikipedia.org/wiki/Refrigerator

   Compressor refrigerators are by far the most common type; they make a noticeable noise, but are most efficient and give greatest cooling effect. Portable compressor refrigerators for recreational vehicle (RV) and camping use are expensive but effective and reliable. Refrigeration units for commercial and industrial applications can be made in ...

3. Applications of the Stirling engine - Wikipedia

   en.wikipedia.org/wiki/Applications_of_the...

   For example, a free-piston Stirling cooler (FPSC) can convert an electrical energy input into a practical heat pump effect, used for high-efficiency portable refrigerators and freezers. Conversely, a free-piston electrical generator could be built, converting a heat flow into mechanical energy, and then into electricity.

4. Stirling engine - Wikipedia

   en.wikipedia.org/wiki/Stirling_engine

   The maximum theoretical efficiency is equivalent to that of the Carnot cycle, but the efficiency of real engines is less than this value because of friction and other losses. [ citation needed ] Since the Stirling engine is a closed cycle, it contains a fixed mass of gas called the "working fluid", most commonly air , hydrogen or helium .

5. 10 Easy Ways to Make Your Refrigerator More Efficient - AOL

   www.aol.com/10-easy-ways-refrigerator-more...

   An energy-efficient refrigerator could help save you money and lower your environmental impact. Check out these tips on how to make your fridge more efficient. 10 Easy Ways to Make Your ...

6. Solar-powered refrigerator - Wikipedia

   en.wikipedia.org/wiki/Solar-powered_refrigerator

   A solar-powered refrigerator is a refrigerator which runs on energy directly provided by sun, and may include photovoltaic or solar thermal energy. Solar-powered refrigerators are able to keep perishable goods such as meat and dairy cool in hot climates and are used to keep much-needed vaccines at their appropriate temperature to avoid spoilage.

7. The 11 Coolest-Looking Wine Refrigerators to Help You Get the ...

   www.aol.com/news/best-wine-refrigerator-help...

   A sleek wine refrigerator will keep your vino extra primo. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. Mail. Sign in ...