1- A lecture hall has a volume of 10° ft' contains air at 70 "F, 1 atm and a humidity ratio of 0.01Ib of water vapor per lb of dry air. Using the appropriate equations, determine a) the relativehumidity, b) the dew point temperature, c) the enthalpy of the mixture per lb of dry air and d) themass of water vapor contained in the room, in Ib.

Given data, Volume of the lecture hall or volume of the air, V = 106 ft3 Dry bulb temperature of the…

Answered: 1- A lecture hall has a volume of 10°…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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1- A sample of moist air has a DBT of 43 °C and WBT of 29 °C , find using the psych. chart the following : a- Specific humidity b- Relative humidity c- Dew point temperature d- Specific enthalpy e- Specific volume.
Thermodynamics: An air conditioning system operates at a pressure of 1 atm. The system has a heating section and an air-conditioning section that provides saturated water vapor at 105 °C.The air enters the heating section at 15 oC and 60 percent relative humidity with a volume flow of 30 m3 / minute and leaves the humidification section at 25 oC and 50 percent relative humidity. a) Find the temperature and relative humidity of the air when leaving the heater section b)Calculate the heat transfer in the heating section [kJ/min] c)Calculate the water flow rate added in the humidification section [ kg/min] NOTE:Please send the solution manually on paper.
A lecture hall shown in Figure having a volume of 106 ft³ contains air at 80°F, 1 atm, and a humidity ratio of 0.01 lb of water vapor per lb of dry air. Using the appropriate equations, determine. a) the relative humidity. b) the dew point temperature, in °F. c) the mass of water vapor contained in the room, in lb.
2. 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)
3.35 An air-vapor mixture at 100°F (37.8°C) dry bulb contains 0.02 lb water vapor per pound of dry air (20 g/kg). The barometric pressure is 28.561 in. Hg (96.7 kPa). Calculate the relative humidity, dew-point temperature, and degree of saturation.
Q1
An air conditioner consists of heating and evaporative cooling sections. The air, where the atmospheric pressure is 101.325 kPa, enters the heating section at 20 °C and 30% relative humidity with a flow rate of 35 m3/min, and exits from the evaporative cooling section at 25 °C and 60% relative humidity. a) The temperature and relative humidity of the air leaving the heating section.b) The amount of heat transfer per unit time to the air in the heating sectionc) Calculate the mass of water added to the air per unit time in the evaporative cooler.d) In order to prevent condensation on the glasses of a person with glasses entering such an environment, what should the temperature of the glasses glass be?
The quality of steam for the mixture contains 18 kg of water in suspension with 100 kg of steam will be O a. 0.84 Ob. 0.68 c. 0.98 d. 0.79
For each of the given initial state parameters, select the appropriate wet bulb temperature: Note:Tdb - dry bulb temperature, F Twb - wet bulb temperature, F Tdp - dew point temperature, F h -enthalpy, Btu/lbair RH - relative humidity, % ω - humidity ratio, lbH2O/lbair v - specific volume, ft3/lbair
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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