Registered: 1352930725 Posts: 121
Reply with quote #1
Even if you do want to do your part in reducing fossil fuel use, it’s hard not to turn up the thermostat on the heater when winter comes. A group from the EMPA (the Swiss Federal Laboratories for Materials Testing and Research) thinks they’ve come up with an instant, no-hassle alternative to stay warm. Their method stores heat during the summer and releases it in winter just with the press of a button. Even more, the stores of captured energy can be carried around wherever they’re needed. http://www.zmescience.com/ecology/renewable-energy-ecology/heat-battery-empa/?utm_source=ZME+Science+Newsletter&utm_campaign=ead324f281-ZME_Science_Daily3_6_2015&utm_medium=email&utm_term=0_3b5aad2288-ead324f281-242666733&ct=t(ZME_Science_Daily11_8_2014) __________________ Go Solar!
Registered: 1352940256 Posts: 1,059
Reply with quote #2
Thanks for the link. Here's an excerpt explaining the basic concept:
" The technology uses a concentrated NaOH (sodium hydroxide) solution as a kind of thermal battery, and largely off the shelf components to recharge or discharge the stored heat." https://www.empa.ch/web/s604/naoh-heat-storage "Can thermal solar energy be stored until wintertime? Yes, this is possible, using a cheap material like sodium lye. Within a European research consortium Empa scientists and their colleagues have spent four years studying this question by pitting three different techniques against each other." __________________ Both temperature rise and airflow are integral to comparing hot air collectors
Registered: 1388591029 Posts: 2,874
Reply with quote #3
Hmmmm, might actually work!
__________________ Solar is like the wind. It may be free, but putting it to work isn't! Willie, Tampa Bay
Registered: 1395591156 Posts: 135
Reply with quote #4
OK! So....who is gonna be the first on to take their ZP box and paint the bottom screen with NaOH and hook up a sprayer with spiral heat extractors to run heat all night, too??? Just sayin'...
Registered: 1421647630 Posts: 15
Reply with quote #5
This technology has been around for a long time. It use to be, the materials would wear out after a while. That is, they would lose the ability to do the phase change efficiently. I wonder what the stored energy density would be. How many watts per pound of material and container. How would they compare with an electric battery?
Registered: 1453722176 Posts: 66
Reply with quote #6
My wife and I use caustic soda (NaOH) to combine with olive oil for making our own soap. There is a great deal of heat from putting it in water. You can try this at home - but be careful!
Here is an interesting link to the EMPA concept http://www.preheat.org/fileadmin/preheat/documents/intersolar/Robert_Weber_Chemical_heat_storage_using_NaOH.pdf