K Factor & Thermal Conductivity: Find Insulation Supplies

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In summary, the conversation discusses the difficulties in obtaining thermal conductivity for insulating materials, as many only list the density and K-factor. It is mentioned that no software can work with K-factor and there is a question about calculating the specific heat for transient thermal modeling. The speaker suggests using an online calculator or finding insulation suppliers that list specific heat information. They also mention the possibility of transforming K-factor into thermal conductivity.
  • #1
SBNY444
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A lot of insulating materials only list the density and K-Factor. Is there a way to obtain thermal conductivity (Watts/[m*C]) so it can be modeled in say finite element program. No software i know of can work with K-Factor. And for a bonus question. can you also calculate the specific heat of a material from these values for the same reason - transient thermal modeling (needs specific heat). Try finding insulation on the web that lists specific heat of the material. I have yet to find a supplier that has specific heat information about their product readily available.
 
  • #3

What is the K Factor?

The K Factor, also known as the thermal conductivity or thermal conductance, is a measure of a material's ability to conduct heat. It is expressed in units of Watts per meter-Kelvin (W/mK) and is used to calculate the rate of heat transfer through a material.

How is the K Factor related to insulation supplies?

The K Factor is an important consideration when choosing insulation supplies. Materials with a lower K Factor have a higher resistance to heat transfer, meaning they are more effective at insulating a space. Insulation supplies with a lower K Factor will help keep a building or system warmer in the winter and cooler in the summer.

What factors affect the K Factor of insulation supplies?

The K Factor of insulation supplies is affected by several factors, including the type of material, its density, thickness, and temperature. Generally, materials with a lower density and higher thickness will have a lower K Factor, as they have more air pockets to trap heat. The temperature also plays a role, as materials with a higher K Factor at low temperatures may have a lower K Factor at higher temperatures.

How is the K Factor measured?

The K Factor is typically measured using a standardized test method, such as ASTM C518. This involves measuring the heat transfer through a material of known thickness and surface area, at a constant temperature difference. The resulting value is the K Factor for that material.

What are some common insulation supplies with low K Factors?

Some common insulation supplies with low K Factors include fiberglass, mineral wool, cellulose, and spray foam. These materials are often used in building insulation, as well as in industrial and automotive applications. Each material has its own unique properties and benefits, so it is important to choose the right one for your specific needs.

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