heat transmittance

thermal transmittance, U-value

The time rate of heat flow per unit area under steady conditions from the fluid on the warm side of a barrier to the fluid on the cold side, per unit temperature difference between the two fluids.
References in periodicals archive ?
PPG Industries aerospace transparencies business is developing coating technology for aircraft cockpit and passenger-cabin windows that reduces solar heat transmittance for more crew and passenger comfort and reduced load on the air-conditioning system for lower operating costs.
The temperature of the inner window surface depends on the outside air temperature and window heat transmittance coefficient.
8 shows the air speed values in the centre plane of the room in cases with different window heat transmittance coefficients.
Passengers will be able to control the amount of solar energy that enters the cabin to reduce solar light and heat transmittance for more comfort, and there will be less stress on the heating and air conditioning system," Morris said.
They will offer an effective and attractive solution to reduce solar heat transmittance, especially with increasing use of composites in aircraft structures that don't dissipate solar heat as well as aluminum," Stone said.
PPG IndustriesO aerospace transparencies business is developing coating technology for aircraft cockpit and passenger-cabin windows that reduces solar heat transmittance for more crew and passenger comfort and reduced load on the air-conditioning system for lower operating costs.
PARIS -- PPG Industries' (NYSE:PPG) aerospace transparencies business is developing coating technology for aircraft cockpit and passenger-cabin windows that reduces solar heat transmittance for more crew and passenger comfort and reduced load on the air-conditioning system for lower operating costs.