4.19 Determine the increase in humidity ratio due to 80 peo- ple in a dance hall if air is circulated at the rate of 0.64 m³/s (1350 cfm).
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- 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.Compute the Humidity Ratio of air at 88 percent rel ative humidity and 36ᵒC when the barometric pressure is 101.325kPa. Psat @ 36 ᵒC= 5.947 kPa. a.0.0337 kgvapor/kgair b.0.0383 kgvapor/kgair c.0.0339 kgvapor/kgair d.0.0340 kgvapor/kgairProvide the complete solution and diagram for this problem. The humidity ratio of air is 0.055. If barometric pressure is 100 kpa, find the partial pressure ofwater vapor. A. 4.23 kpa B. 7.34 kpa C. 8.12 kpa D. 5.21 kpa
- 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/KgaFifty 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, °F2. The absolute humidity at atmospheric pressure at 40 ° C is 0.011 kg air / kg dry air. Specify: A. Air vapor partial pressure. = AnswerkPa. b. Relative humidity = Answer% c. Dew point temperature. = Answer (° C)
- Exercise 17.6 Air at 20°C and 60% relative humidity is heated to 90°C and then enters a continuous dryer in an adiabatic operation. The air exits at 40 °C. Calculate: a) the inlet volumetric flow rate of air required to remove 20 kg of water/h from the product and b) the required energy to heat the air.Q1/ From Humidity chart calculate: a- The initial absolute humidity and relative humidity. b- The final absolute humidity and relative humidity. For air having a dry bulb temperature of 48.9°C and a wet bulb of 37.8°C is to be dried by first cooling to 21.11PC to condense water vapor and then heating to 26.7°C.Atmospheric air at 15 °C, relative humidity 10%, is too hot and also too dry. An air conditioner must deliver air at 21 °C and 50% humidity relative in the amount of 3600m³/h. Propose a scheme to achieve this, find the amount of liquid (at 20°C) required to be added or removed and any transfer of heat.
- 2) In a simple heating process, air enters a duct at a temperature of 10°C, and a relative humidity of 80%. The volumetric flow rate of air is 145 m³/min. Air leaves the duct with a temperature of 30°C. Process takes place at a pressure of 1atm. Determine a) the rate of heat transfer in kJ /min b) the relative humidity at the outlet of the duct. Neglect the changes in kinetic and potential energies.An air vapor mixture has a DB temperature of 30 degrees Celsius and a humidity ratio of 0.015kg/kg d.a. calculate for two barometric pressures 85 kPaa and 101.325 kPaa:a) The enthalpyb) The dew point temperatureA cooling coil cools humid air of 100kg from t1= 40 degrees relative humidity 1 = 60% t2 = 10 degrees Find the final relative humidity, the dew point of the initial air and the humidity ratio, using a pschometric chart