Home |
Search |
Today's Posts |
#1
|
|||
|
|||
I have seen a heat storing product that is essentially waterwith it's melting point
feradejack wrote:
I have seen this on a BBC programme called "Tomorrow's World" back in the late 70's or early 80's. I saw it first used as the contents of a storage heater to be used in a Truck (for when the driver sleeps in the cabin). I saw it later as a row of gallon containers in a greenhouse to help keep the internal temperature constant. I believe that the melting point was raised to over 20 degrees celcius (70 F) and maybe quite a lot higher. If you have any idea what this stuff is, I would like to know! "Ice 9", from the book _Cat's Cradle_. HTH :-) Bob |
#2
|
|||
|
|||
I have seen a heat storing product that is essentially water with it's melting point
I have seen this on a BBC programme called "Tomorrow's World" back in the late 70's or early 80's.
I saw it first used as the contents of a storage heater to be used in a Truck (for when the driver sleeps in the cabin). I saw it later as a row of gallon containers in a greenhouse to help keep the internal temperature constant. I believe that the melting point was raised to over 20 degrees celcius (70 F) and maybe quite a lot higher. If you have any idea what this stuff is, I would like to know! |
#3
|
|||
|
|||
I have seen a heat storing product that is essentially waterwith it's melting point
feradejack wrote:
I have seen this on a BBC programme called "Tomorrow's World" back in the late 70's or early 80's. I saw it first used as the contents of a storage heater to be used in a Truck (for when the driver sleeps in the cabin). I saw it later as a row of gallon containers in a greenhouse to help keep the internal temperature constant. I believe that the melting point was raised to over 20 degrees celcius (70 F) and maybe quite a lot higher. If you have any idea what this stuff is, I would like to know! Do a Google search for "phase change heat storage" (without the quotes) and then be prepared to read a lot. Remembering a great deal from your early physics and chemistry classes will be useful. One example: http://www.ces.purdue.edu/extmedia/ae/ae-89.html The first chemical they mention is "Glauber's salt" and with that I'll leave you to your research... -- John McGaw [Knoxville, TN, USA] http://johnmcgaw.com |
#4
|
|||
|
|||
I have seen a heat storing product that is essentially waterwith it's melting point
zxcvbob wrote:
feradejack wrote: I have seen this on a BBC programme called "Tomorrow's World" back in the late 70's or early 80's. I saw it first used as the contents of a storage heater to be used in a Truck (for when the driver sleeps in the cabin). I saw it later as a row of gallon containers in a greenhouse to help keep the internal temperature constant. I believe that the melting point was raised to over 20 degrees celcius (70 F) and maybe quite a lot higher. If you have any idea what this stuff is, I would like to know! "Ice 9", from the book _Cat's Cradle_. HTH :-) Bob Well that ought to confuse a lot of people! |
#5
|
|||
|
|||
Sounds like part of the thermodynamic laws.... A quick search of wikipedia found what I was looking for.... van der Waals (see first link), a modification of the Ideal Gas Law (second link) which is pV = nRT.
In essence, pressure change will determine vaporization points, and therefore the ammount of heat that can be stored. -------------------------------- http://www.keengardener.co.uk/ |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Natural solar heat gain v controlled heat gain? | Orchids | |||
Bill would essentially wipe out organic farming.. | North Carolina | |||
heat stroke and heat exhaustion | Ponds | |||
HELP!! Pruning cryptocoryne "melting"??!!! | Freshwater Aquaria Plants | |||
HELP!! Pruning cryptocoryne "melting"??!!! | Freshwater Aquaria Plants |