Dear All,
I have a problem here. I compared the cooling loads of a building with 0%WWR, 50%WWR and 100%WWR and got the results that the cooling load decreases sa the WWR increase. I am located in a tropical country and this should actually not happen. I have checked the constructions but it does not seem that anything is wrong.
The construction details are:
External Wall (default construction from sketchup):
! <Construction>,Construction Name,#Layers,#CTFs,Time Step {hours},ThermalConductance {w/m2-K},OuterThermalAbsorptance,InnerThermalAbsorptance,OuterSolarAbsorptance,InnerSolarAbsorptance,Roughness
! <Material>,Material Name,Thickness {m},Conductivity {w/m-K},Density {kg/m3},Specific Heat {J/kg-K},ThermalResistance {m2-K/w}
! <Material:Air>,Material Name,ThermalResistance {m2-K/w}
Construction,EXTERIOR WALL, 5, 16, 0.167, 0.4586 , 0.900, 0.900, 0.700, 0.700,MediumRough
Material,M01 100MM BRICK, 0.1016, 0.890, 1920.000, 790.000, 0.1142
Material,M15 200MM HEAVYWEIGHT CONCRETE, 0.2032, 1.950, 2240.000, 900.000, 0.1042
Material,I02 50MM INSULATION BOARD, 0.0508, 0.030, 43.000, 1210.000, 1.693
Material:Air,F04 WALL AIR SPACE RESISTANCE, 0.1500
Material,G01A 19MM GYPSUM BOARD, 0.0190, 0.160, 800.000, 1090.000, 0.1187
Window Glazing:
! <WindowConstruction>,Construction Name,#Layers,Roughness,Conductance {W/m2-K},SHGC,Solar Transmittance at Normal Incidence,Visible Transmittance at Normal Incidence
! <WindowMaterial:Glazing>, Material Name, Optical Data Type, Spectral Data Set Name, Thickness {m}, Solar Transmittance,Front Solar Reflectance, Back Solar Reflectance, Visible Transmittance, Front Visible Reflectance,Back Visible Reflectance,Infrared Transmittance, Front Thermal Emissivity, Back Thermal Emissivity,Conductivity {W/m-K},Dirt Factor,Solar Diffusing
! <WindowMaterial:Gas>,Material Name,GasType,Thickness {m}
WindowConstruction,EXTERIOR WINDOW, 1,VerySmooth, 2.141, 0.125, 0.051, 0.074
WindowMaterial:Glazing,SPEAR TECHONOLOGY,SpectralAverage,, 0.03491, 0.05048, 0.77453, 0.77453, 0.07340, 0.21158, 0.37284,
Can anyone help me with this? I have been stuck with this for a week
__._,_.___
I have a problem here. I compared the cooling loads of a building with 0%WWR, 50%WWR and 100%WWR and got the results that the cooling load decreases sa the WWR increase. I am located in a tropical country and this should actually not happen. I have checked the constructions but it does not seem that anything is wrong.
The construction details are:
External Wall (default construction from sketchup):
! <Construction>,Construction Name,#Layers,#CTFs,Time Step {hours},ThermalConductance {w/m2-K},OuterThermalAbsorptance,InnerThermalAbsorptance,OuterSolarAbsorptance,InnerSolarAbsorptance,Roughness
! <Material>,Material Name,Thickness {m},Conductivity {w/m-K},Density {kg/m3},Specific Heat {J/kg-K},ThermalResistance {m2-K/w}
! <Material:Air>,Material Name,ThermalResistance {m2-K/w}
Construction,EXTERIOR WALL, 5, 16, 0.167, 0.4586 , 0.900, 0.900, 0.700, 0.700,MediumRough
Material,M01 100MM BRICK, 0.1016, 0.890, 1920.000, 790.000, 0.1142
Material,M15 200MM HEAVYWEIGHT CONCRETE, 0.2032, 1.950, 2240.000, 900.000, 0.1042
Material,I02 50MM INSULATION BOARD, 0.0508, 0.030, 43.000, 1210.000, 1.693
Material:Air,F04 WALL AIR SPACE RESISTANCE, 0.1500
Material,G01A 19MM GYPSUM BOARD, 0.0190, 0.160, 800.000, 1090.000, 0.1187
Window Glazing:
! <WindowConstruction>,Construction Name,#Layers,Roughness,Conductance {W/m2-K},SHGC,Solar Transmittance at Normal Incidence,Visible Transmittance at Normal Incidence
! <WindowMaterial:Glazing>, Material Name, Optical Data Type, Spectral Data Set Name, Thickness {m}, Solar Transmittance,Front Solar Reflectance, Back Solar Reflectance, Visible Transmittance, Front Visible Reflectance,Back Visible Reflectance,Infrared Transmittance, Front Thermal Emissivity, Back Thermal Emissivity,Conductivity {W/m-K},Dirt Factor,Solar Diffusing
! <WindowMaterial:Gas>,Material Name,GasType,Thickness {m}
WindowConstruction,EXTERIOR WINDOW, 1,VerySmooth, 2.141, 0.125, 0.051, 0.074
WindowMaterial:Glazing,SPEAR TECHONOLOGY,SpectralAverage,, 0.03491, 0.05048, 0.77453, 0.77453, 0.07340, 0.21158, 0.37284,
Can anyone help me with this? I have been stuck with this for a week
__._,_.___
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