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2. Air preheater - Wikipedia

   en.wikipedia.org/wiki/Air_preheater

   Schematic diagram of typical coal-fired power plant steam generator highlighting the air preheater (APH) location. An air preheater is any device designed to heat air before another process (for example, combustion in a boiler), with the primary objective of increasing the thermal efficiency of the process.

3. Thermal wheel - Wikipedia

   en.wikipedia.org/wiki/Thermal_Wheel

   Diagramatic operation of a thermal wheel Ljungström Air Preheater by Swedish engineer Fredrik Ljungström (1875–1964). A thermal wheel, also known as a rotary heat exchanger, or rotary air-to-air enthalpy wheel, energy recovery wheel, or heat recovery wheel, is a type of energy recovery heat exchanger positioned within the supply and exhaust air streams of air-handling units or rooftop ...

4. Parabolic trough - Wikipedia

   en.wikipedia.org/wiki/Parabolic_trough

   Parabolic trough at a plant near Harper Lake, California. A parabolic trough collector (PTC) is a type of solar thermal collector that is straight in one dimension and curved as a parabola in the other two, lined with a polished metal mirror.

5. Solar-powered Stirling engine - Wikipedia

   en.wikipedia.org/wiki/Solar-powered_Stirling_engine

   NASA patented a type of solar-powered Stirling engine on August 3, 1976. It used solar energy to pump water from a river, lake, or stream. [1] The purpose of this apparatus is to “provide a low-cost, low-technology pump having particular utility in irrigation systems employed in underdeveloped arid regions of the earth…[using] the basic principles of the Stirling heat engine“.

6. Stirling engine - Wikipedia

   en.wikipedia.org/wiki/Stirling_engine

   The hot heat exchanger is in thermal contact with an external heat source, such as a fuel burner, and the cold heat exchanger is in thermal contact with an external heat sink, such as air fins. A change in gas temperature causes a corresponding change in gas pressure, while the motion of the piston makes the gas alternately expand and compress.

7. Here’s the last day to send your gifts in time for the holidays

   www.aol.com/last-day-send-gifts-time-143042135.html

   (Mario Tama/Getty Images) Winter storms , out-of-stock items, ground shipping risks and a host of other issues could spell out shipping slowdowns in the days leading up to Christmas Eve.

8. Rotary kiln - Wikipedia

   en.wikipedia.org/wiki/Rotary_kiln

   Heat exchange in a rotary kiln may be by conduction, convection and radiation, in descending order of efficiency. In low-temperature processes, and in the cooler parts of long kilns lacking preheaters, the kiln is often furnished with internal heat exchangers to encourage heat exchange between the gas and the feed.

9. Stanley recalls 2.6 million mugs after reports of burns from ...

   www.aol.com/news/stanley-recalls-2-6-million...

   Stanley is recalling 2.6 million mugs sold in the U.S. after the company received dozens of consumer complaints, including some users who reported getting burned and requiring medical attention ...