0
critical thikness of insulation of sphere
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
What is the definition of 'critical thickness'?
The thickness at which insulation begins to decrease heat loss is described as Critical Thickness
What is critical thickness during heat treatment?
In iron materials ,during the critical thickness of it the ironoxide grows inside the material. This thickness where it happens is called critical thickness.
What is the physical basis for existence of a critical insulation radius?
The general thinking is that with the increase in thickness of insulation around the system(say a pipe) the heat loss will always reduce.This is true only up to a certain radius of the insulation called the critical insulation radius.After this radius any increase in the thickness would in fact increase the heat loss.This happens because there are two phenomena taking place here viz. conduction and convection.Conductive resistance is dx/k i.e. thickness/conductivity with increase in thickness the conductive resistance increases hence heat loss decreases.Convective resistance is 1/hA,now beyond the critical radius the increase in conductive resistance is offset by the reduction in convective resistance.This is because with increasing radius one has also achieved a greater heat transfer area as A=2*pi*r*l.
What is critical radius of insulation?
The critical radius of insulation is a counterintuitive concept within the study of heat transfer.
What type of equipement measures the thickness of the insulation of a conductor?
Do you mean resistance instead of thickness?
How does the thickness of loft insula tion affect heat loss?
Yes Thinner insulation is more loss - not as much loss as with no insulation Thicker insulation less loss.
How does the thickness of insulation affect how quickly hot water cools?
don't have a clue?!
How does the thickness of loft insulation affect heat loss?
the thicker the insulation is then there will be less heat loss. The material also affects heat loss
How thick is R's 38 insulation?
From everything I have seen it would be about 12 inches for conventional fiber glass insulation available from Home Depot or Lowes. Polyiso insulation can give up to r-6 per inch. That equates to 7 inches for r-42.
R -values of standard Batt insulation?
The R-value of standard Batt insulation typically ranges from R-3.1 to R-3.7 per inch of thickness. However, the actual R-value can vary based on the specific materials and thickness of the insulation.
What thickness cable require for 415 volt?
Voltage determines a cable's insulation thickness, not its conductor thickness (or, more accurately, its cross-sectional area). It's current that determines the csa of a conductor, not voltage.
Why is old putty good for insulation?
I am not sure where you heard this but the thickness of old putty against the thickness of insulation for r-value is not as good. The best insulator is air. Fiberglass insulation has a high r-value because of the air it holds not the fiberglass itself. So that's why you don't cram 6in fiberglass into a 4in space, it does not work when you compress it.
