[Stoves] Energy units

[Frank Shields]

Dear Kevin and all, 

 

Just for the fun of it..

 

That is the energy taking 87818 grams of H2O going from a solid state to a
liquid state. Solid state must be 0 deg C (?) so it's the energy taking it
from 0 solid to 0 deg liquid(?).

Like going from water 100c to a vapor 100c it takes 2256 kj/kg energy for
that transformation. Is there also needed energy going from ice to water? 

 

12000 BTU / 83.3 lbs solid H2O

144 BTU / lb ice = 144 BTU / 454 g ice or 0.317 BTU / g ice

1 BTU = 1055 J

1055 X 0.317 = 334 J / g ice 

 

So for every gram of ice it takes 334 J energy to turn it into liquid?
Staying at 0 deg C ?

 

Thanks

 

Frank

 

 

Frank Shields

Control Laboratories; Inc.

42 Hangar Way

Watsonville, CA  95076

(831) 724-5422 tel

(831) 724-3188 fax

frank at biocharlab.com

www.controllabs.com

 

 

 

 

 

 

 

 

 

 

From: Stoves [mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of
Kevin
Sent: Thursday, January 30, 2014 10:34 AM
To: Discussion of biomass cooking stoves
Subject: Re: [Stoves] Energy units

 

Dear Frank

 

In Refrigeration, the energy unit is "tons of refrigeration." This is the
energy removed from a room when 1.0 tons of ice melts over a 24 hour period.
This works out to 12,000 BTU/hr.

 

Kevin

----- Original Message ----- 

From: Frank Shields <mailto:frank at compostlab.com>  

To: 'Discussion of biomass cooking stoves'
<mailto:stoves at lists.bioenergylists.org>  

Sent: Thursday, January 30, 2014 1:34 PM

Subject: Re: [Stoves] Energy units

 

>From what the installer of the heat-cooling unit (to maintain a room at 27c)
said it is heat needed to melt a ton of ice. This based back when ice blocks
were used - so he thinks. Only in the U.S. !

 

Frank

 

 

From: Stoves [mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of
Crispin Pemberton-Pigott
Sent: Thursday, January 30, 2014 7:14 AM
To: 'Discussion of biomass cooking stoves'
Subject: Re: [Stoves] Energy units

 

Dear Richard and Frank

 

I think you are correct: energy stored per unit mass of storage medium.

 

Wood stores quite a lot actually, compared with some fuels. 

 

Regards

Crispin

 

 

Frank, 

 

I think they call that energy density in ref. to batteries compared to
gasoline or other energy sources, or not?.

 

Richard 

/ Nicaragua 

 

 

 

On Jan 29, 2014, at 6:58 PM, Frank Shields wrote:

 

Stovers,

 

I came across an energy unit that is new to me. It 'lbs of energy'.

 

As if we need another one!  Perhaps this is the energy in a pound of wood or
something? It's in regards to controlling the temperature in a room.

 

Regards

 

Frank

 

 

  _____  

_______________________________________________
Stoves mailing list

to Send a Message to the list, use the email address
stoves at lists.bioenergylists.org

to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists
.org

for more Biomass Cooking Stoves,  News and Information see our web site:
http://stoves.bioenergylists.org/

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20140130/f265a4c4/attachment.html>