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Thread: Warm Weather
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17-07-2006, 08:51 PM #1
Warm Weather
Anyone enjoying the current high temps give a thought to the basic energy equation?
Having a cool shower tonight after a gruelling day with my head stuck in a ceiling void at 37C it caused me to think how clever the equation was. Q = m c dt.
2 components of the equation are constants (Q + c) and 2 are variables (m + dt)
As the water temp entering the house increases the dt decreases which must be compensated by an increased m. So you turn the temp setting down (which increases water flow)
I know I'm sad but it's just something that most take for granted
Anyone know who discovered/invented the formula?
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17-07-2006, 09:12 PM #2
Re: Warm Weather
Originally Posted by frank
.... I thought you just did.
Sodd's the name...... Law's the game.
Established 1791 - still going strong.
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17-07-2006, 10:46 PM #3
Re: Warm Weather
Ah! but does the flow increase or do you just use 'less hot' ?
Brian - Newton Abbot, Devon, UK
Retired March 2015
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18-07-2006, 01:53 AM #4
Re: Warm Weather
What were u having a shower with? BEEER
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18-07-2006, 04:04 AM #5
Re: Warm Weather
well hotter the water the lower its density, meaning for a given volume you will need more flow to make up for the lesser density. the inverse for cold, colder the water higher its density thus you will need less flow to move a given weight as you would for hot water.
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18-07-2006, 07:04 PM #6
Re: Warm Weather
Originally Posted by The MG Pony
BEER does though. mmmmmmm
On my second right now - trying to replace all that sweat today
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18-07-2006, 07:32 PM #7
Re: Warm Weather
density = mass/volume
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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18-07-2006, 07:54 PM #8
Re: Warm Weather
Originally Posted by Peter_1
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18-07-2006, 08:24 PM #9
Re: Warm Weather
Water density doesn't change that much at normal temperatures. The changes in density result in very minor differences in flow rate required.
Perhaps you should try pouring propane over your head Frank. That seems to be the cure all for some members.
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18-07-2006, 09:06 PM #10
Re: Warm Weather
Originally Posted by frank
See below...
http://scienceworld.wolfram.com/phys...ofCooling.html
What's the prize Frank?
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18-07-2006, 09:18 PM #11
Re: Warm Weather
Originally Posted by US Iceman
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18-07-2006, 10:25 PM #12
Re: Warm Weather
Never mind the beer Frank (sorry, did I say that out loud?); I was showering earlier after fixing the boiler as it wasn't making hot water - doh!
Anyway, I digress, there I was cooling off and thinking about your question/problem Frank when it it came to me
Frank, you and I have got to get a lifeBrian - Newton Abbot, Devon, UK
Retired March 2015
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18-07-2006, 11:29 PM #13
Re: Warm Weather
Brian & Frank,
These are the sort of things that will keep you up at night. It always fascinating to learn where the information comes from we use every day.
In some respects, refrigeration is like the English language.
A little of this, a little of that...
I looked at the website for the ale Frank, my that looks tasty.
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