thermal conductivity comparison glass and concrete
thermal conductivity comparison glass and concrete
(OP)
Dear All,
I am trying to compare the thermal conductivity of
10 mm tempered glass and 6" concrete wall.
Any inputs or best practices for evaluation please ...
I am trying to compare the thermal conductivity of
10 mm tempered glass and 6" concrete wall.
Any inputs or best practices for evaluation please ...
RE: thermal conductivity comparison glass and concrete
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RE: thermal conductivity comparison glass and concrete
RE: thermal conductivity comparison glass and concrete
Basically I would like to know what is the net heat gain inside the room in a day.
RE: thermal conductivity comparison glass and concrete
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RE: thermal conductivity comparison glass and concrete
Should i check for convection also ? But convection involves liquids and gases ...
RE: thermal conductivity comparison glass and concrete
TTFN (ta ta for now)
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RE: thermal conductivity comparison glass and concrete
I could not understand your comment "vacuum environment "
Could you please elaborate ...
RE: thermal conductivity comparison glass and concrete
Moreover,
> units in row 7 are incorrect, should be W/mm^2-K
> row 12 is nonsensical, because you used mm^2 as the area unit. The temperature for conduction is the delta temperature, not the absolute. Absolute temperature only shows up in radiated heat and heat transfer coefficient calculations.
> mm^2 for area is a nonsensical
> row 16 is nonsensical, since that's per mm^2 of area.
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RE: thermal conductivity comparison glass and concrete
You have an HVAC problem here. There are a lot of HVAC knowledge in books, for example ASHRAE Handbook, that can aid you in solving your problems.
RE: thermal conductivity comparison glass and concrete
If you want a concrete wall then choose concrete.
Design the HVAC accordingly.
RE: thermal conductivity comparison glass and concrete
@vij36: text book suff - heat transfer has 3 elements, conduction, convection and radiation. Each element has constant for specific maerials that are easy to find. If you are really considering building a room, then for HVAC design you will be able to find table/graphs that will tell you the amount of heat influx based on temperature difference. The tables etc ha solved the problem for you in a standard way that will be valid for most cases.
Best regards, Morten
RE: thermal conductivity comparison glass and concrete
RE: thermal conductivity comparison glass and concrete
TTFN (ta ta for now)
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RE: thermal conductivity comparison glass and concrete
my doubt is whether it is glass or brick wall the surrounding media such as air remains the same. Or if I am wrong will the surrounding area's medium such as air will have separate effects on glass and brick ?
RE: thermal conductivity comparison glass and concrete
TTFN (ta ta for now)
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RE: thermal conductivity comparison glass and concrete
Apologize for the inconvenience.
Am relatively new to hvac material selection.
Basically the task in my hand is to choose between 10 mm glass or porotherm brick.
Glass U value is ranging from 1.67 to 5.88. W/ m k
Link
Porotherm thermobrick U value is 0.6 W/ m k
Link
So for less heat gain inside should we need to choose less U vale material ?
Spare me if I am awfully wrong .
RE: thermal conductivity comparison glass and concrete
TTFN (ta ta for now)
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RE: thermal conductivity comparison glass and concrete
Are the double glazing units are better than glass blocks ? Will the spacer can improve the hvac performance ?
RE: thermal conductivity comparison glass and concrete
TTFN (ta ta for now)
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RE: thermal conductivity comparison glass and concrete
In typical building construction for a cold climate, glazing (windows and doors) represent a greatly higher rate of heat loss than properly constructed walls. But we're not talking about bare concrete extending from the outside to the inside of the structure in that case- there's an insulating material designed into the wall somewhere.
RE: thermal conductivity comparison glass and concrete
This website says awnings are effective to block only 50% of solar radiation (location specific) south facing. Any calculations exists.
Link
RE: thermal conductivity comparison glass and concrete