15) "Questions 13 and 14. If the fan moves 85 m3 of air per hour through the basement, this is the equivalent of a 50.03 cfm (cfm=cubic feet per minute) bathroom fan. Assuming the density of the air is 1.1123 kg/m3 and that 50% of the ventilated air makes contact with the walls for long enough to reach the wall temperature, using the psychrometric chart, how much moisture will be moved into or out of the basement in 24 hours (using conditions from questions 9, 10, 11, and 12) ? 14) What is the total weight (in kg) of the water vapour that is removed or added to the basement in 24 hours? (within 5%)" "16. You have just moved to a hot, dry climate where it is 37C and 20% rh, and the heat is starting to get to you. Luckily you remember from your Building Science education mention of something called a swamp cooler (evaporative cooler, that cools air by EVAPORATING water into the air). Before building one, you want to know to what temperature you could cool the air to without exceeding 80% rh. Use the psychrometric chart to find the answer. (within 1.5C)" 17. What temperature must the inside surface of a window be at for indoor winter air at 40% rh and 23C to begin condensing on its surface? (within 1.5C)
15) "Questions 13 and 14. If the fan moves 85 m3 of air per hour through the basement, this is the equivalent of a 50.03 cfm (cfm=cubic feet per minute) bathroom fan. Assuming the density of the air is 1.1123 kg/m3 and that 50% of the ventilated air makes contact with the walls for long enough to reach the wall temperature, using the psychrometric chart, how much moisture will be moved into or out of the basement in 24 hours (using conditions from questions 9, 10, 11, and 12) ? 14) What is the total weight (in kg) of the water vapour that is removed or added to the basement in 24 hours? (within 5%)"
"16. You have just moved to a hot, dry climate where it is 37C and 20% rh, and the heat is starting to get to you. Luckily you remember from your Building Science education mention of something called a swamp cooler (evaporative cooler, that cools air by EVAPORATING water into the air). Before building one, you want to know to what temperature you could cool the air to without exceeding 80% rh. Use the psychrometric chart to find the answer. (within 1.5C)"
17. What temperature must the inside surface of a window be at for indoor winter air at 40% rh and 23C to begin condensing on its surface? (within 1.5C)
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