Find the relative humidity in a room at a temperature of 20 C. The wet bulb temperature is 15.5 C.[Ans.: 63%].
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Find the relative humidity in a room at a temperature of 20 C. The wet bulb temperature is 15.5 C.[Ans.: 63%].
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- 18. DETAILS OBINPHYS8 5.P.024. ASK YOUR TEACHER The total volume of a new house is 618 m³. Before the heat is turned on, the air temperature inside is 15°C, and the relative humidity is 48 percent. After the air is warmed to 20°C, how much water vapor must be added to the air to make the relative humidity 48 percent? kgK 1 . 1. Conditions: Outside winter time -5C and 80% RH. What is the moisture content of the outside air? Provide your answer to within 0.0004 kg wv/kg dry air of the correct answer. 2. Conditions: Outside winter time -5C and 80% RH. What is the enthalpy of the outside air? Provide your answer to within 2 kJ/kg dry air of the correct answer. 3. "Use the outside air from the first 2 questions. Now bring this outside air inside for ventilation of a house, and heat it to 23C (without adding moisture). What is the new RH (relative humidity) of this air? Provide your answer to within 3% of the correct answer." 4. What is the moisture content of dry air and water vapour at 23C and 40% RH? Provide your answer to within 0.0004 kg wv/kg dry air of the correct answer. 5. "Now using the outside air you have warmed up in question 3. How much moisture do you need to add to this air now, so that at 23C it will be at 40% RH? Provide your answer to within 0.0004 kg wv/ kg dry air of the correct…l MTN 1/1 米 12:08 PM O 19% I Ha. In a Sample of air, the temperature is meusures as 25°c ans the wet bul b temperature is Using the Psychrometric Chart, fin4 he ). nela fiue humidity O. specific enthaley 0. Specific humiding y. Dew W). Spechic Volume 18°C. point
- Fifty gallons per minute of water enters a cooling tower at 115°F. Atmospheric air at 60°Fand 55% relative humidity enters the tower at 6,000 cfm and leaves at 90°F saturated.Determine:A.) The volume of water that leaves the tower in gpm. B.) The exit temperature of water, °F4.3. The Assmann psychrometer’s dry thermometer shows 22оС, wet thermometer- 14оС. The atmospheric pressure is 745 Hg mm. Calculate the absolute, maximum and relative air humidity, humidity deficit, physiological humidity deficit, find the dew point.A mixture of dry-air is at atmospheric pressure of 101.325. The dry-bulb temperature is 25 C and the relative humidity is humidity ratio is 0.0015 kgvapor/kgair- Determine; a. relative humidity, % b. dew point temperature, C c. specific volume of dry air, m³/kg d. Humidity ratio of saturated air e. the enthalpy, in kJ/kg.
- Gas-Vapor Mixtures (Properties of atmospheric air) 20. Find the humidity ratio of an air that has tdb = 27 °C and twb = 20 °C with arelative humidity of 55%. (Use PB = 100 KPa)a. 0.0124 lbv/lbab. 0.24 lbv/lbac. 0.133 Kgv/Kgad. 0.0133 Kgv/KgaHomwork-6.png Homework-6 P.1 Calculate the dryness fraction (quality) of steam which has 1.5 Kg of water in suspension with 50 Kg of steam? A vessel having a volume of 0.05 m contains a mixture of saturated water and saturated steam at a temperature of 245 ° C. The mass of liquid present is 10 Kg. P.2 Find the following: (a) The pressure. (b) The mass. (c) The specific volume. (d) The specific enthalpy (e) The specific entropy. (f) The specific internal energy.1. An air-conditioned space is maintained at 25 °C and 50% relative humidity. The outside conditions are 40 °C DBT and 25 °C WBT. The space has a sensible heat gain of 24.5 kW. The conditioned air is supplied to the space as saturated air at 10 °C. The equipment consists of an air washer such that the air entering to it comprises 25% outside air and the remainder being recirculated room air. Calculate: - A. The volume flow rate supplied to the space. B. The latent heat gain to the space. C. The cooling load of the air washer.
- Pls. Answer thank you! The amount of water carried by air in a cooling tower is 15 lb/min. The change in humidity ratio in outlet and inlet is 0.025 lb/lb. Determine the volume flow of air needed if specific volume is 15 ft3 /lb.RH2 = 43% What is the specific humidity of the air stream #1, w1 (lbm H2O/lbm air)? What is the specific humidity of the air stream #2, w2 (lbm H2O/lbm air)? What is mass flow rate of dry air in stream #1 (lbm/s)? What is mass flow rate of dry air in stream #2 (lbm/s)? What is the relative humidity of the outlet (%)?Q3: The atmospheric conditions of air are 35° C dry bulb temperature, 60% relative humidity and 1.01325 bar pressure. If 0.005 kg of moisture per kg of dry air is removed, the temperature becomes 25° C. Determine the final relative humidity and dew point temperature. [Ans. 88.6%; 23° C]