Definitions for u-value
ˈyuˌvæl yuu-val·ue

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1. U-valuenoun

   thermal transmittance or thermal conductance

WikipediaRate this definition:0.0 / 0 votes

1. u-value

   In the context of construction, the R-value is a measure of how well a two-dimensional barrier, such as a layer of insulation, a window or a complete wall or ceiling, resists the conductive flow of heat. R-value is the temperature difference per unit of heat flux needed to sustain one unit of heat flux between the warmer surface and colder surface of a barrier under steady-state conditions. The measure is therefore equally relevant for lowering energy bills for heating in the winter, for cooling in the summer, and for general comfort. The R-value is the building industry term for thermal resistance "per unit area." It is sometimes denoted RSI-value if the SI units are used. An R-value can be given for a material (e.g. for polyethylene foam), or for an assembly of materials (e.g. a wall or a window). In the case of materials, it is often expressed in terms of R-value per metre. R-values are additive for layers of materials, and the higher the R-value the better the performance. The U-factor or U-value is the overall heat transfer coefficient and can be found by taking the inverse of the R-value. It is a property that describes how well building elements conduct heat per unit area across a temperature gradient. The elements are commonly assemblies of many layers of materials, such as those that make up the building envelope. It is expressed in watts per square metre kelvin: W/(m2⋅K). The higher the U-value, the lower the ability of the building envelope to resist heat transfer. A low U-value, or conversely a high R-Value usually indicates high levels of insulation. They are useful as it is a way of predicting the composite behaviour of an entire building element rather than relying on the properties of individual materials.

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1. uvulae

How to pronounce u-value?

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How to say u-value in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of u-value in Chaldean Numerology is: 9

2. Pythagorean Numerology

   The numerical value of u-value in Pythagorean Numerology is: 1

Examples of u-value in a Sentence

1. Julie Sanderson:

   As women who are incarcerated, lots of them are very timid, when they answer you, they don’t look at you and stand up straight, in the real world that’s an important skill, it’s important that they see the value in themselves, and that they know they can do something wonderful.

2. Gregor Boehm:

   The ideal equity cheque for each investment will be 125 to 275 million euros from the fund, but together with co-investments from our investors the total equity investment can be up to 1 billion euros and the enterprise value (deal value including debt), even up to 2 billion euros.

3. Tenisha Tate-Austin Patrick Semansky/AP/FILE White:

   I think it’s systemic, implicit, explicit and structural, you have all these inflection points where making different decisions can lead to a very different result. The methodology is not so hard and fast that every appraiser is going to come up with the same value.

4. Wu Yuxiao:

   Many countries have noticed the financial and strategic value of Arctic Ocean passages. China has also paid much attention.

5. Jason Rubin:

   The value proposition we want to deliver is,' I checked into Facebook Gaming on average 20 times a day.' That's the average consumer, they don't check in through a browser gaming app 20 times a day, they check in on Facebook Gaming 20 times a day. And that's 20 opportunities to find a game you like.

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/U-Value
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/U-Value