elwoodblues
Elwood Blues
join:2006-08-30
Toronto, ON
1 edit | House Heating
For some reason I can't wrap my head around this.
For the sake of argument the temperature outside is 0c, and I keep my house at say 20c.
Outside of the cost of getting the house to 20c, why is it more expensive then say having the house at 18c? The temperature outside is still lower, my heat loss doesn't change.
Why is it cheaper?
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Jake: "Four fried chickens, and a coke" Elwood: "And some dry white toast, pleas |
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Its a Secret
Whatever
Premium
join:2008-02-23
U B Funny
 ·Shaw
| Maintaining a higher temp always increases thermal loss, depending on insulation values. Radiated heat will seek a level, if you will, and relates to a coefficient of thermal dynamics.
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"In the future, that which is not mandatory will be illegal"
"Nobody knows the age of the human race, but everybody agrees that it is old enough to know better" - Anonymous |
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elwoodblues
Elwood Blues
join:2006-08-30
Toronto, ON | Anglais s'il vous plaît |
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Thane_Bitter
join:2005-01-20
London, ON | The heat lost of your house is not constant. |
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wkendhippie
Is it Friday yet ?
Premium
join:2004-02-16
Clarksdale
1 edit | reply to elwoodblues
Your insulation is not 100 % efficient to stop heat escaping. The walls conduct heat to the outside and there are air leaks as well. The warmer it is inside means you have a greater difference and that difference radiates out and heats the outside. More heat escapes.
Heat transfers by radiation, convection and conduction. There is a limit to whats economical in quantity of insulation related to payback on savings in heat / fuel. |
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Its a Secret
Whatever
Premium
join:2008-02-23
U B Funny
·Shaw
| reply to Thane_Bitter
said by Thane_Bitter  :The heat lost of your house is not constant. Pecisely. The greater the difference between the inside and outside, heat will be lost at a greater rate. As the temps get closer to each other, heat loss will slow.
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"In the future, that which is not mandatory will be illegal"
"Nobody knows the age of the human race, but everybody agrees that it is old enough to know better" - Anonymous |
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Its a Secret
Whatever
Premium
join:2008-02-23
U B Funny
·Shaw
| reply to wkendhippie
said by wkendhippie :There is a limit to whats economical in quantity of insulation related to payback on savings in heat / fuel. That would depend on the number of years averaged over, and the ever increasing price of heating; in whatever form.
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"In the future, that which is not mandatory will be illegal"
"Nobody knows the age of the human race, but everybody agrees that it is old enough to know better" - Anonymous |
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anglais
@videotron.ca
| reply to elwoodblues
said by Its a Secret :Maintaining a higher temp always increases thermal loss, depending on insulation values. Radiated heat will seek a level, if you will, and relates to a coefficient of thermal dynamics. said by elwoodblues :Anglais s'il vous plaît Basically he said to touch up on the first »en.wikipedia.org/wiki/First_law_···dynamics and second law »en.wikipedia.org/wiki/Second_law···dynamics of thermodynamics. Once you grasp the dynamics of enthalpy »en.wikipedia.org/wiki/Enthalpy and entropy »en.wikipedia.org/wiki/Entropy, which are the basics and as we all know is based on kinetic energy »en.wikipedia.org/wiki/Thermodyna···perature in a thermodynamic system »en.wikipedia.org/wiki/Thermodynamic_system, then you will have a functional grasp of why thermal equilibrium »en.wikipedia.org/wiki/Thermodyna···ilibrium occurs.
Basically the insulating factor of the various parts of your house relative to the outside system just delays the inevitable.
In layman's terms the above can be summarized as follows, »en.wikipedia.org/wiki/Shit_happens. |
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shaner
Premium
join:2000-10-04
Calgary, AB
| reply to elwoodblues
Whoa, no need to get all propeller head on him. 
It's really simple. Why do you have a winter coat and a spring coat? Because in the winter, yor body loses temperature much faster than in the spring. And then your body has to work that much harder to maintain a constant temperature.
Your house is the same way. The colder it is outside, the harder your furnace has work that much harder to maintain a constant temperature. The thigher that constant temperature is, the more often your furnace has to come on to maintain that temp.
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I'm a man, but I can change. If I have to. I guess.
The opinions in this post are wholly my own and in no way reflect the opinions of, or are influenced by, Bell Canada or its affiliate companies. |
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David_T
TSI, here I am
join:2006-09-01
Oakville, ON
·Cogeco Cable
 ·TekSavvy Solutions..
| reply to anglais
This post made my day 
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www.dnclviolators.ca - Doing what the CRTC should have done a long time ago. |
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peterboro1
join:2006-11-03
Peterborough, ON
| reply to shaner
said by shaner :Whoa, no need to get all propeller head on him. Haven't heard that before. Must be a prairie dialect. |
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urbanriot
join:2004-10-18
St Catharines, ON | It's more of an oldie, used throughout the US too, maybe something your parents would've heard. |
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FusionGuy
join:2001-12-06 | reply to anglais
We're not all Stationary Engineers you know. You have to KISS sometimes. |
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Its a Secret
Whatever
Premium
join:2008-02-23
U B Funny
·Shaw
1 edit | To KISS, let's use this example.
You presently have a 4" heating / cooling duct in the house. If you move to a 3" duct to reduce the size, you can increase the thermal efficiency by 75% of it's present. Why?
4" to 3" = .75. But the killer is, a law of thermo-fluid dynamics is, essentially, whenever you increase the speed of a fluid, it's heating / cooling properties increase.
So... .75% (reduction in pipe size) x .75% (increase in heat transfer) = 56.3% increase in dissipation capacity.
The reason? The speed of the fluid involved, and less transfer to the transport medium i.e. pipe.
I use this to calculate heat transfers on my engines. The same law is involved.
edit
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"In the future, that which is not mandatory will be illegal"
"Nobody knows the age of the human race, but everybody agrees that it is old enough to know better" - Anonymous |
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Tyreman
join:2002-10-08 | reply to elwoodblues
warm travels to cold. |
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donoreo
Premium
join:2002-05-30
North York, ON
| reply to elwoodblues
As an OT, we were checking out an open house on the weekend. The house was built in the early '70s. Oddly, it had a furnace and forced air as well as electric baseboard. WTF? The electric are original, the thermostats had F on them. I do find it hard to believe that they would have retrofitted forced air in the house. I especially do not believe it considering they still had the '70s gold carpeting!
Anyone ever see that before?
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The irony of common sense, it is not that common
I cannot deny anything I did not say
I have a personal vendetta against the improper use of "then" and "than"
I mock people who give their children odd spelling of names |
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dirtyjeffer
Merry Christmas
Premium
join:2002-02-21
London, ON
·Rogers Hi-Speed
| said by donoreo :Anyone ever see that before? sort of...my buddy bought a semi many years ago that used to have electric baseboard heating, but it was converted to forced air gas heating with central air...of course, the baseboard heaters were removed...heating bills dropped from something like $500 in the winter down to about $100.
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Today's motto: Dearly beloved, We are gathered here today to bid farewell to personal responsibility and accountability. |
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bluebaron2
Stuff Happens
Premium,MVM
join:2001-02-01
North of 44
| reply to donoreo
Yeah Me.
One of our previous houses had electric baseboard as it's heating system. I retro-fitted a High Efficiency Gas Forced air system into it. ( That included installing all the duct work ( including cutting holes through the basement inside walls).
I then removed all the baseboard heaters and converted all the supply circuits down to 120v from the 240v they were original wired at. Not everyone is capable of doing this so maybe they decided to just leave the old baseboards sitting there turned down real low rather than going through the hassle of removing them.
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bb2
Since I've given up hope I feel much better. |
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donoreo
Premium
join:2002-05-30
North York, ON | This house was an estate sale, original owner. NOTHING had been updated since it was built. At least not for appearance anyway. |
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bluebaron2
Stuff Happens
Premium,MVM
join:2001-02-01
North of 44 | Go look at the date on the furnace and see when it was installed.
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bb2
Since I've given up hope I feel much better. |
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