cold Archives – The Green Optimistic green tech news, since 2008 Sat, 07 Mar 2015 19:09:14 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 2667534 BluBox Thermal Fan Takes Heat from Ceiling to Floor https://www.greenoptimistic.com/blubox-thermal-fan-heat-ceiling-floor/ https://www.greenoptimistic.com/blubox-thermal-fan-heat-ceiling-floor/#comments Mon, 23 Jan 2012 19:08:23 +0000 https://www.greenoptimistic.com/?p=22117 The warmest (and most expensive) air in your home (or small business) is lazily floating around above your head looking for some way to escape. This is especially true if you make your heat with a Single Point Source (wood burning stove, floor furnace, wall furnace, etc.) or you have high ceilings, or (who would […]

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]]> https://www.greenoptimistic.com/blubox-thermal-fan-heat-ceiling-floor/feed/ 1 22117 How To Make a Low Temperature Differential (LTD) Stirling Engine https://www.greenoptimistic.com/how-to-make-a-low-temperature-differential-ltd-stirling-engine-20080405/ https://www.greenoptimistic.com/how-to-make-a-low-temperature-differential-ltd-stirling-engine-20080405/#comments Sat, 05 Apr 2008 06:17:40 +0000 https://www.greenoptimistic.com/?p=262 LTD stirling engines are interesting. They harvest the temperature difference of the environment versus a cold object, and using this they power some pumps. I don’t know the efficiency of this stirling engine, but it would be a nice idea for the hot areas of the world to put in some ice in your car […]

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