Air temperature
Air temperature
(OP)
Hello,
how long would take to increase temperature of 1m3 of air from 5 to 15 C considering a heat of 30C?
how long would take to increase temperature of 1m3 of air from 5 to 15 C considering a heat of 30C?





RE: Air temperature
You're asking a question which is about energy ( heat capacity difference of air from 1 temp to another), but don't provide any energy data.
A temperature is not energy.
E.g. if you blew in air of 30C at 1m3/sec it would take a second
If you had an item with a surface area of 1cm2 at 30C it would take an eternity.
An item with a surface area of 10m2 (e.g. with loads of fins) it would take 10 seconds.
See what I mean?
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Air temperature
I have got a cold storage area for food and I would like to know how long it would take to the temperature to increase from 5 to 15 considering a temperature outside of 30. The area is insulated though.
RE: Air temperature
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Air temperature
So what you need to do is:
figure out a surface area around your cold store which is surrounded by your 30C heat.
If it is literally a 1m cube, then this is 6 m2
Find out what is the thermal conductivity of your insulation and thickness.
From that you can work out a heat transfer quantity per m2.
That will give you an energy value going into your cube
From the web find out the heat capacity of air per degree at 5 C.
Do a simple calculation.
Of course this goes astray as soon as you include within your cold storage area anything which is also at 5C which is not air ((e.g. food or a cold ice block or whatever). the much larger mass of the other things will take a lot longer to heat up than air. And it also goes completely astray as soon as you open the cold store and let in air at 30C.
SO I suggest you go away, think about what it is you're trying to work out, get all the required information, give it a go as described above and then come back to us.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Air temperature
RE: Air temperature