Is it true that the higher the U-value the less the heat loss?

Question

Note: U-Value is the rate of heat flow per unit area and unit temperature.

I need scientific answers please.

Answer 1

Heat Loss is dependent on the R-value of the material..
R-value is the resistance to heat loss...higher is the R-value,lesser is the Heat loss.

R-value is given by

R-value=Temperature difference. area. time / heat loss


U-value is the reciprocal of R-value

U-value=1/ R-value

hence U-value is directly proportional to heat loss...

and hence more the U-value more is the heat Loss.


R-Value is a measure of resistance to heat gain or loss. The higher the number, the better a product is at resisting heat loss.

U-Factor, the reciprocal of R-Value, is the measure of the rate of heat loss through a material. Thus, in all aspects of home design, one should strive for the lowest U-Factors possible because the lower the U-Factor, the less heat that is needlessly escaping.

Answer 2

No i don't think so, if U value is rate of heat flow per unit area then it implies that if U value is higher then more heat will flow per unit area of the material and as a result more heat will be lost as a result of conduction or convection or both. Heat can also be losed thru radiation, hope u know that?

Answer 3

Q=UADelTlm
Heat transfer will become better as the U increases, while the area requirements will decrease. Therefore whenever exchanging heat between two fluids, higher U values will reduce the surface area requirements.

Answer 4

It depends.

If U value heat, then share the real U.

Answer 5

Scientifically false.