Nomenclature</h5> A Area, m 2 </P>a Convective heat transfer coefficient, W/(m 2 °C)</P>c Mass specific heat, J/ ( kg C o ) </P>E b o d y Metabolic rate of human body, W/m 2 </P>G Mass flow rate of air or water, kg/s</P>H b o d y Height of human body, m</P>h Enthalpy, J/kg</P>I s o l Solar radiant intensity, W/m 2 </P>M b o d y Mass of human body, kg</P>Δ M Moisture gain rate, kg/s</P>Δ Q Energy gain rate, W</P>t C o Temperature,</P>V Volume, m 3 </P>W Humidity ratio, g/(kg dry air)</P>α ρ Absorption factor of solar radiation</P>τ Time, s </P>ρ Density, kg/m 3 </P>λ Coefficient of heat conductivity, W/(m °C)</P>δ Thickness, m</P>Subscripts</h5> a Air</P>a n − a r Air layer between the work zone and the air-return zone</P>a s − a n Air layer between the air-supply zone and the work zone</P>i Inlet of air-supply zone</P>n Work zone</P>r Air-return zone</P>r i w Internal wall</P>r e w External wall</P>r q Indoor heat source</P>s Air-supply zone</P>1 Introduction</h5> The air-conditioned room is an important component in a whole HVAC system. The air-conditioning system is usually designed with respect to the thermal characteristic of the air-conditioned room, and the
Building and Environment – Elsevier
Published: Jun 1, 2013
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