Definitions for u-value
ˈyuˌvæl yuu-val·ue

WiktionaryRate this definition:1.0 / 2 votes

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.

Anagrams for u-value »

1. uvulae

How to pronounce u-value?

1. Alex

   US English

   David

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   Mark

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   Daniel

   British

   Libby

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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. Melanie St. Jean:

   As far as overall value, I would not invest in this bag, although the price is fairly low, there are other bags that would be more advantageous for travel.

2. Chairman James Leigh-Pemberton:

   I believe that realising a total of at least 25 billion from the sale of RBS shares -- representing over three-quarters of the government's stake in RBS at the current market price -- is feasible in the period to May 2020, while delivering value for money for the taxpayer, provided market conditions are supportive.

3. Scott Morrison:

   This outcome demonstrates the value of discrete behind-the-scenes work of officials in resolving complex and sensitive consular cases in close partnership with other governments.

4. Pat Pourchot:

   Does oil and gas trump everything in terms of natural resources? Is that the first and highest value for every acre of federal lands? I would think not.

5. Dave Nonis:

   We need to get value, i know from talking to other teams that they covet some of the players we have. If there are trades that make sense for us, we're going to do it.

References

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