Three Principles Of Thermal Insulation Systems

With the development of society, scientists invent new efficient and effective technologies for humanity to live with comfort, and thermal insulation system is one of these to serve people by reducing undesirable heat loss or gain and decreasing the energy demands of heating and cooling systems. In summer, the amount of heat entering through walls and ceilings is reduced, keeping the home cooler. In winter, insulation helps to keep warmth inside the home.

This article will explain three principles of thermal insulation systems in building, namely conduction, convection and thermal radiation, then discusses three applications in home, finally shows the significance of the thermal insulation systems for humanity.

Generally, Mukherjee (2013,

Normally, gas and liquid are collectively named fluids and their molecules can move freely so most of time the process of heat transfer is completed by the movement of molecules. When some molecules absorb heat energy, the density of this group of molecules decreases so they move upwards and other close cooler molecules fill the vacancy and this happens again to keep fluid molecules move in a circle. This phenomenon is called convection (Kreith, F et al. 2010). A common knowledge that hot air or hot water rises, can be explained. Applied to the thermal insulation of one house, it means that the house must be tightly sealed to prevent hot air from escaping outside and being replaced by cold air from outside in winter. Airtightness is not easy to achieve in construction. Because hot air rises, thermal insulation of the roof or ceiling is extremely important to prevent heat

From perspectives of environment, insulation is the most cost effective way of reducing energy consumption and also can help to protect environment. As thermal insulation system maintains the temperature in rooms, it controls thermal energy loss or gain depending on different seasons; the demands of using air conditioners or fireplaces are reduced. In summer, citizens can hold patience to against sweltering hot weather without air conditioners, and in winter there is no need to burn wood or coal while a thick coat can solve all problems. As a result, the greenhouse gases emission is reduced as the amount of fuel burnt to produce electricity keeps falling. Furthermore, insulation reduces average home heating and cooling costs so the burden of increasing energy can be afforded. As the right insulation is a once-only cost that lasts for the life of the building and requires no further