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Thermal Insulation


Thermal insulation usually refers to the use of appropriate insulation materials and design adaptations for buildings to slow the transfer of heat through the enclosure to reduce heat loss or gain.
The transfer of heat is caused by the temperature difference between indoors and outdoors. Heat may be transferred either by conduction, convection, or radiation. The rate of transmission is closely related to the propagating medium.
Heat is lost or gained by transmission through the roof, ceilings, walls, floors, windows, and doors.

This heat reduction and gain is usually unwelcome. Apart from increasing the load on the HVAC system resulting in more energy wastes it also reduces the thermal comfort of people using the building.
Thermal insulation in buildings is an important factor in achieving thermal comfort for its occupants. Insulation reduces unwanted heat loss or gain and can decrease the energy demands of heating and cooling systems.

It does not necessarily deal with issues of adequate ventilation and may or may not affect the level of sound insulation.

There are three modes of heat transfer:

  • Conduction-transfer of heat through solids
  • Convection– transfer of heat through fluids
  • Radiation– transfer of heat through space/vacuum

In thermal insulation, you need to apply a product that will address the three modes of heat
transfer.

Insulation Against Heat Conduction

  • In insulating against conduction, we use a product that has a low thermal conductivity; in
    other words, a poor conductor of heat.
  • Various products have different thermal conductivity ratings.

Thermal Conductivity is the degree to which a specified material conducts heat, calculated as the ratio of the current density in the material to the electric field that causes the flow of current. It is the reciprocal of the resistivity.

Conduction
Thermal conductivity (often denoted k, λ, or κ) is the property of a material to conduct heat. In Imperial units. Thermal conductivity is measured in BTU/(hr·ft °F) and W/m.K in SI unitsHeat transfer occurs at a lower rate across materials of low thermal conductivity than across materials of high thermal conductivity.

Jumbolene® Insulation has a low thermal conductivity of 0.0293W/m.k.
This means that, when used for insulation, Jumbolene® Insulation offers a high thermal resistance towards heat flow.

Thermal resistance is a heat property and a measurement of a temperature difference by which an object or material resists heat flow.
Thermal resistance is measured in R-Value in units (m2K)/W in SI units or (ft2·°F·hr)/Btu in imperial units
For example, Jumbolene® Insulation Batt, 50mm think has an R-value of 10.6 ft2·°F·hr/Btu

Jumbolene® insulation ensures energy efficiency as well as thermal comfort to the users of the building which results in high productivity

Insulating Against Convection
The most common means of transferring heat by convection is flowing air. Warm air is lighter than cold air.
This difference in density makes air molecules circulate and flow to settle in the right position within the air region or locality. This, coupled with wind flow, transmits heat into living or working spaces.

Jumbolene® Insulation is laid either by overlapping or butting tightly the adjoining sheets. This prevents any flow of air or moist that supports heat flow and by so doing, all heat flow by convection is cut out.

Insulating Against Radiation
Thermal Insulation against radiation works on the principle of Emissivity.
Emissivity is the ratio of the energy radiated from a material’s surface to that radiated from a blackbody (a perfect emitter) at the same temperature and wavelength and under the same viewing conditions
The use of reflective foil insulation on Jumbolene® Insulation reflects back radiant heat thus reducing heat ingress into a building. Using a radiant barrier is the most effective means of blocking heat flow by radiation.

Jumbolene® Insulation
In summary, Jumbolene® Insulation is a 3 in 1 Reflective Foil Insulation solution, combining the benefits of conduction, convection and Radiation barrier.
Jumbolene® insulation is made of 100% closed-cell polyethylene foam fused with reinforced.