With the same configurations as the wall MWB (shown below), using the thermal resistance of 0.12, 0.08, 1.9,0.11, 0.18, 0.03 (unit: m^2*K/W) and vapor permeance of 9200, 290, 100, 29, 2010 and 57000 (unit: ng/Pa*s*m^2) for interior surface coefficient, gypsum board, insulation (mineral fiber), rigid foam sheathing, vinyl siding, respectively. If the indoor environment is in a condition of 21 Celsius and 40% relative humidity while outdoor environment is.-6.6 Celsius and 50% relative humidity, (1) will the wall have condensation? (2) what is the actual distribution of Vapor pressure across each layer of the building enclosure if you find condensation, what is the rate of water accumulation inside the enclosure? Do you think it will be an issue? RIGID FOAM SHEATHING VINYL SIDING OUTDOOR AIR FILM 6.7 ms (24 km) / - MINERAL FIBER BATT (90 mm) www SUAR GYPSUM WALLBOARD INDOOR AIR FILM STILL AIR) (A) WOOD STUD (NOMINAL 50 x 100 mm) Hint: (1) Depending on whether condensation happens, the vapor pressure will need to be corrected if condensation happens (refer to the course slides to see how to make correction). You can skip the water accumulation calculation if you find no condensation happens. (2) Use ASHRAE Handbook of Fundamental to check for saturated vapor pressure (Note: when outdoor is -6.6 Celsius, you can use 350 Pa as the saturated vapor pressure). With the same configurations as the wall MWB (shown below), using the thermal resistance of 0.12, 0.08, 1.9,0.11, 0.18, 0.03 (unit: m^2*K/W) and vapor permeance of 9200, 290, 100, 29, 2010 and 57000 (unit: ng/Pa*s*m^2) for interior surface coefficient, gypsum board, insulation (mineral fiber), rigid foam sheathing, vinyl siding, respectively. If the indoor environment is in a condition of 21 Celsius and 40% relative humidity while outdoor environment is.-6.6 Celsius and 50% relative humidity, (1) will the wall have condensation? (2) what is the actual distribution of Vapor pressure across each layer of the building enclosure if you find condensation, what is the rate of water accumulation inside the enclosure? Do you think it will be an issue? RIGID FOAM SHEATHING VINYL SIDING OUTDOOR AIR FILM 6.7 ms (24 km) / - MINERAL FIBER BATT (90 mm) www SUAR GYPSUM WALLBOARD INDOOR AIR FILM STILL AIR) (A) WOOD STUD (NOMINAL 50 x 100 mm) Hint: (1) Depending on whether condensation happens, the vapor pressure will need to be corrected if condensation happens (refer to the course slides to see how to make correction). You can skip the water accumulation calculation if you find no condensation happens. (2) Use ASHRAE Handbook of Fundamental to check for saturated vapor pressure (Note: when outdoor is -6.6 Celsius, you can use 350 Pa as the saturated vapor pressure)