Free Ice!!!!

Camping in Ontario & Quebec and the Central Canadian Chapter of TearJerkers

Free Ice!!!!

Postby eamarquardt » Wed Mar 09, 2011 6:19 pm

The recent thread on icebox design got me going again on the topic of ice. More precisely, how much does it cost to make ice. There have been reports that people are making it for "free" in their freezers at home. Unfortunately the laws of thermodynamics state there is no "free lunch" (or ice for that matter) and in fact you don't ever get quite what you pay for!

Anyway I thought I'd figure out how much "free ice" really costs.

Here are the numbers:

To make ten pounds of ice you have to remove about this much heat:

70f to 32f water = 38f * 1btu/pound * 10# = 380 BTU

10# water to 10# ice = 144btu/# * 10# = 1440 btu

380 btu + 1440 btu = 1820 btu

1880btu = 0.533 Kilowatt Hours (http://www.mhi-inc.com/Converter/watt_calculator.htm)

Typical cost of electricity = $0.15/kilowatt hour (http://michaelbluejay.com/electricity/cost.html)

If you were making heat with an electric resistance heater you would get one watt of heat out for one watt of electricity. Making cold is a bit different. You are moving heat not making it. Soooo, for every watt of electricity you can typically move three watts of heat. So, to make 10# of ice it would take about .3333 * 0.533 Kilowatt Hours = 0.178 Kilowatt Hours of electricity or 0.178 KWH * $0.15/KWH = $0.0265 for ten pounds of ice. In short about two cents!!!!!!

There you have it. My two cents on “free iceâ€
Last edited by eamarquardt on Wed Mar 09, 2011 8:30 pm, edited 2 times in total.
The opinions in this post are my own. My comments are directed to those that might like an alternative approach to those already espoused.There is the right way,the wrong way,the USMC way, your way, my way, and the highway.
"I'm impatient with stupidity. My people have learned to live without it." Klaatu-"The Day the Earth Stood Still"
"You can't handle the truth!"-Jack Nicholson "A Few Good Men"
"Some people spend an entire lifetime wondering if they made a difference in the world. The Marines don't have that problem"-Ronald Reagan
User avatar
eamarquardt
Silver Donating Member
 
Posts: 3179
Images: 150
Joined: Sat Nov 11, 2006 11:00 pm
Location: Simi Valley, State of Euphoria (Ca)

Postby planovet » Wed Mar 09, 2011 6:25 pm

Bored today Gus?? :lol:
ImageMark (& Cindi)
Visit our website: Little Swiss Teardrop

I was wondering why the water balloon was getting bigger... and then it hit me.

ImageImageImageImage
User avatar
planovet
The Cat Man
 
Posts: 5582
Images: 3
Joined: Tue Nov 27, 2007 4:48 pm
Location: Plano, Texas

Bored?

Postby eamarquardt » Wed Mar 09, 2011 6:31 pm

Bored? NEVER!!!!! Bordom is a state of mind! However, my neuralgias (5th, 7th, 8th, 9th, and 11th cranial nerves, bilaterally, type II as in continuous pain, Google Suicide Disease) caught up with me after a GREAT three week run!!!!!!!!!! Down for the count, taking opiates (again) and can't bear to watch TV! Reading a good book, reflecting, and laying low.

Cheers,

Gus
The opinions in this post are my own. My comments are directed to those that might like an alternative approach to those already espoused.There is the right way,the wrong way,the USMC way, your way, my way, and the highway.
"I'm impatient with stupidity. My people have learned to live without it." Klaatu-"The Day the Earth Stood Still"
"You can't handle the truth!"-Jack Nicholson "A Few Good Men"
"Some people spend an entire lifetime wondering if they made a difference in the world. The Marines don't have that problem"-Ronald Reagan
User avatar
eamarquardt
Silver Donating Member
 
Posts: 3179
Images: 150
Joined: Sat Nov 11, 2006 11:00 pm
Location: Simi Valley, State of Euphoria (Ca)
Top

Postby legojenn » Thu Mar 10, 2011 5:55 am

Peak Ontario electricity rates are 7.4 cents/kw/h, so it only costs 1 cent there.
Jenn
User avatar
legojenn
The 300 Club
 
Posts: 471
Images: 4
Joined: Sun Jul 05, 2009 8:40 pm
Location: Quebec, Aylmer
Top

Postby eamarquardt » Thu Mar 10, 2011 7:18 am

legojenn wrote:Peak Ontario electricity rates are 7.4 cents/kw/h, so it only costs 1 cent there.


Couldn't resist putting in your one cent could you? :lol:

Cheers,

Gus
The opinions in this post are my own. My comments are directed to those that might like an alternative approach to those already espoused.There is the right way,the wrong way,the USMC way, your way, my way, and the highway.
"I'm impatient with stupidity. My people have learned to live without it." Klaatu-"The Day the Earth Stood Still"
"You can't handle the truth!"-Jack Nicholson "A Few Good Men"
"Some people spend an entire lifetime wondering if they made a difference in the world. The Marines don't have that problem"-Ronald Reagan
User avatar
eamarquardt
Silver Donating Member
 
Posts: 3179
Images: 150
Joined: Sat Nov 11, 2006 11:00 pm
Location: Simi Valley, State of Euphoria (Ca)
Top

Postby legojenn » Thu Mar 10, 2011 8:03 am

eamarquardt wrote:
legojenn wrote:Peak Ontario electricity rates are 7.4 cents/kw/h, so it only costs 1 cent there.


Couldn't resist putting in your one cent could you? :lol:

Cheers,

Gus


Nope, but I did resist recalculating using metric measure and simplifying it all.
Jenn
User avatar
legojenn
The 300 Club
 
Posts: 471
Images: 4
Joined: Sun Jul 05, 2009 8:40 pm
Location: Quebec, Aylmer
Top

Postby tonyj » Thu Mar 10, 2011 10:57 am

Great calculation, but you forgot to include the cost of water and the amortized capital costs related to the refrigeration equipment and ice trays. :D
Still graced with two eyes and ten fingers (due in no small part to luck!).

Just when you think a problem is solved, an uglier result replaces it.

tony
User avatar
tonyj
Super Lifetime Member
 
Posts: 2468
Images: 160
Joined: Mon Sep 26, 2005 10:18 pm
Location: Texas, Corpus Christi
Top

Postby eamarquardt » Thu Mar 10, 2011 3:28 pm

tonyj wrote:Great calculation, but you forgot to include the cost of water and the amortized capital costs related to the refrigeration equipment and ice trays. :D


Are you trying to start a "bun fight" or does it only seem that way? :lol:

Picky, picky, picky!!! :thinking:

Where does one buy "ice trays" to make a ten pound block of ice? I was surprized at how inexpensive making your own ice is as compared to buying ice. I'm thinking of starting an "ice company" as the profits seem obscene!!!!!!!

Any orders? Free delivery FOB Ventura County, Ca. $0.50/mile outside the county (up to 2000#, call for quote for larger orders). Weight of ice guaranteed at shipment (actually I'll throw in extra just to be safe). Actual weight of delivered ice may vary (down to and including zero ice) depending of delivery location and weather conditions.


Cheers,

Gus
The opinions in this post are my own. My comments are directed to those that might like an alternative approach to those already espoused.There is the right way,the wrong way,the USMC way, your way, my way, and the highway.
"I'm impatient with stupidity. My people have learned to live without it." Klaatu-"The Day the Earth Stood Still"
"You can't handle the truth!"-Jack Nicholson "A Few Good Men"
"Some people spend an entire lifetime wondering if they made a difference in the world. The Marines don't have that problem"-Ronald Reagan
User avatar
eamarquardt
Silver Donating Member
 
Posts: 3179
Images: 150
Joined: Sat Nov 11, 2006 11:00 pm
Location: Simi Valley, State of Euphoria (Ca)
Top


Return to Ontario & Quebec, Canada

Who is online

Users browsing this forum: No registered users and 1 guest