3. Calculate (a) specific volume, (b) enthalpy, and (c) humidity ratio for moist air at 21...
3. Calculate (a) specific volume, (b) enthalpy, and (c) humidity ratio for moist air at 21 C and relative humidity of 30%, at a barometric pressure of 755mm Hg.
Homework Answers
solution:
a) specific volume= RT/P = 62.36*295/755 L =24.36L
b)enthalpy=PV =24.36*755 =18396.2
c) humidity ratio=
x = 0.62198 pw / (pa - pw) (2)
where
pw = partial pressure of water vapor in moist air (Pa, psi)
pa = atmospheric pressure of moist air (Pa, psi)
at 21C , Pa=2333 Pa
By this we can calculate
please give me like..its help me to write more questions..thank you..
Add Answer to:
3. Calculate (a) specific volume, (b) enthalpy, and
(c) humidity ratio for moist air at 21...
Exercise 2 Moist air at 1 atm. barometric pressure has a dry bulb temperature of 40°C...
Exercise 2 Moist air at 1 atm. barometric pressure has a dry bulb temperature of 40°C and a wet bulb temperature of 320C. Using both the equations for the moist air properties and the psychrometric chart find: g) the partial pressure of the water vapor h) humidity ratio i) relative humidity j) dew-point temperature k) specific volume 1) enthalpy of moist air Insert the data and the results from the chart in the following table: Enthalpy Specific kJ/kg m/kg Humidity...
Exercise 3 Moist air at 1 atm. barometric pressure has a dry bulb temperature of 29...
Exercise 3 Moist air at 1 atm. barometric pressure has a dry bulb temperature of 29 C and a wet bulb temperature of 22°C. Using the psychrometric chart and the table for saturated vapor find the following air properties: Pr T- 40 a) the partial pressure of the water vapor b) humidity ratio c) relative humidity d) dew-point temperature e) specific volume ) enthalpy of moist air
stream consisting of 130 m'/min of moist air at a rature of 8°C and a humidity ratio of 0.0015 kg(vapor)/ dry a...
stream consisting of 130 m'/min of moist air at a rature of 8°C and a humidity ratio of 0.0015 kg(vapor)/ dry air) is mixed adiabatically with a second stream 12 températ Kgl ting of 400 m3/min of moist air at 25°C and 40% relative humidity. The pressure is constant throughout at 1 bar. Using the psychrometric chart, determine (a) the humidity ratio and (b) the temperature of the exiting mixed stream, in °C
stream consisting of 130 m'/min of moist...
A moist air of 25 °C and 200 kPa with relative humidity of 50% is mixed...
A moist air of 25 °C and 200 kPa with relative humidity of 50%
is mixed with nitrogen of 25 °C and 200 kPa. Then, the mixture is
expanded through a turbine to 100 kPa. Assuming the turbine is
ideal, determine the minimum nitrogen and moist air mole ratio
(kmol N2/kmol moist air) that does not induce condensation within
the turbine. Assume specific heat ratios are same for water vapor,
dry air, and nitrogen as 1.4.
3. (10 points) A...
1.What are the relative humidity, humidity ratio, dew point, and enthalpy for a condition where the...
1.What are the relative humidity, humidity ratio, dew point, and enthalpy for a condition where the dry‐bulb temperature is 95 oF and the wet‐bulb temperature is 70 oF? 2.What are the relative humidity, enthalpy and humidity ratio of moist air with the dry bulb temperature of 26.5 oC and dew point of 15 oC?
Question 5 (a) A sample of moist air at a temperature of 36 °C and total...
Question 5 (a) A sample of moist air at a temperature of 36 °C and total pressure 1.01 bar has 0.018 kg of moisture per kg of dry air. Calculate the relative humidity and the enthalpy (kJ/kg of dry air) of the air. (8 marks) (b) The air in (a) is cooled at constant total pressure until condensation of water just begins. Calculate the temperature and the enthalpy (kJ per kg of dry air) when condensation just begins. (6 marks)...
Moist air is at 80F (26.67C) dry-bulb, 0.0150 lb-w/lb-da (0.0150 kg-w/kg-da) humidity ratio, pressure of 14.696...
Moist air is at 80F (26.67C) dry-bulb, 0.0150 lb-w/lb-da (0.0150 kg-w/kg-da) humidity ratio, pressure of 14.696 psia (101.35 kPa). Determine the dew-point temperature, relative humidity, volume in cu ft/lb-da (cu meters/kg-da), and enthalpy in Btu/lb-da (kJ/kg-da) using the moist air property tables and the ideal gas equations. What error is incurred using the ideal gas approach? Compare these results with the psychrometric charts (available in ASHRAE Fundamentals)
Moist air at 20C and 50% relative humidity enters a duct consisting of a heating section...
Moist air at 20C and 50% relative humidity enters a duct consisting of a heating section followed by an evaporative cooling process. The air is heated to 35C in the heating section. The air then enters the evaporative cooling section where liquid water is injected into the moist air. The moist air exits the evaporative cooling section at 60% relative humidity. A. Determine the specific humidity at the exit of the heating section. (5 of 45 points. Please input your...
Theo To calculate the humidity ratio [kg(v)/kg(a)] of moist air one would use the following equat...
Theo To calculate the humidity ratio [kg(v)/kg(a)] of moist air one would use the following equation ry (2501-2.38IT..006(T -T 2501-1.805T-4.186T where Tab is the dry bulb temperature [C] and Twb is the wet bulb temperature [C swb is the saturated humidity ratio evaluated at wet bulb temperature. It is determined by 0.6219 P-P (T where Psar(Twb) is the water saturation pressure at wet bulb temperature An approximation is the following (T)6.102T) where Psat is in millibars. (1 mb 100 Pa)...
Moist air at 20°C, 1 atm, and 43% relative humidity and a volumetric flow rate of...
Moist air at 20°C, 1 atm, and 43% relative humidity and a volumetric flow rate of 900 m²/hrs. enters a control volume at steady state and flow along a surface maintained at 65°C, through which heat transfer occurs. Liquid water at 20°C is injected at a rate of 5 kg/hr and evaporates into flowing stream. For the control volume, Wev=0, and kinetic and potential energy effects are negligible. Moist air exits at 32°C, 1 atm. (a) draw the system schematic...
Exercise 2 Moist air at 1 atm. barometric pressure has a dry bulb temperature of 40°C and a wet bulb temperature of 320C. Using both the equations for the moist air properties and the psychrometric chart find: g) the partial pressure of the water vapor h) humidity ratio i) relative humidity j) dew-point temperature k) specific volume 1) enthalpy of moist air Insert the data and the results from the chart in the following table: Enthalpy Specific kJ/kg m/kg Humidity...
Exercise 3 Moist air at 1 atm. barometric pressure has a dry bulb temperature of 29 C and a wet bulb temperature of 22°C. Using the psychrometric chart and the table for saturated vapor find the following air properties: Pr T- 40 a) the partial pressure of the water vapor b) humidity ratio c) relative humidity d) dew-point temperature e) specific volume ) enthalpy of moist air
stream consisting of 130 m'/min of moist air at a rature of 8°C and a humidity ratio of 0.0015 kg(vapor)/ dry air) is mixed adiabatically with a second stream 12 températ Kgl ting of 400 m3/min of moist air at 25°C and 40% relative humidity. The pressure is constant throughout at 1 bar. Using the psychrometric chart, determine (a) the humidity ratio and (b) the temperature of the exiting mixed stream, in °C
stream consisting of 130 m'/min of moist...
A moist air of 25 °C and 200 kPa with relative humidity of 50%
is mixed with nitrogen of 25 °C and 200 kPa. Then, the mixture is
expanded through a turbine to 100 kPa. Assuming the turbine is
ideal, determine the minimum nitrogen and moist air mole ratio
(kmol N2/kmol moist air) that does not induce condensation within
the turbine. Assume specific heat ratios are same for water vapor,
dry air, and nitrogen as 1.4.
3. (10 points) A...
Question 5 (a) A sample of moist air at a temperature of 36 °C and total pressure 1.01 bar has 0.018 kg of moisture per kg of dry air. Calculate the relative humidity and the enthalpy (kJ/kg of dry air) of the air. (8 marks) (b) The air in (a) is cooled at constant total pressure until condensation of water just begins. Calculate the temperature and the enthalpy (kJ per kg of dry air) when condensation just begins. (6 marks)...
Moist air at 20C and 50% relative humidity enters a duct consisting of a heating section followed by an evaporative cooling process. The air is heated to 35C in the heating section. The air then enters the evaporative cooling section where liquid water is injected into the moist air. The moist air exits the evaporative cooling section at 60% relative humidity. A. Determine the specific humidity at the exit of the heating section. (5 of 45 points. Please input your...
Theo To calculate the humidity ratio [kg(v)/kg(a)] of moist air one would use the following equation ry (2501-2.38IT..006(T -T 2501-1.805T-4.186T where Tab is the dry bulb temperature [C] and Twb is the wet bulb temperature [C swb is the saturated humidity ratio evaluated at wet bulb temperature. It is determined by 0.6219 P-P (T where Psar(Twb) is the water saturation pressure at wet bulb temperature An approximation is the following (T)6.102T) where Psat is in millibars. (1 mb 100 Pa)...
Moist air at 20°C, 1 atm, and 43% relative humidity and a volumetric flow rate of 900 m²/hrs. enters a control volume at steady state and flow along a surface maintained at 65°C, through which heat transfer occurs. Liquid water at 20°C is injected at a rate of 5 kg/hr and evaporates into flowing stream. For the control volume, Wev=0, and kinetic and potential energy effects are negligible. Moist air exits at 32°C, 1 atm. (a) draw the system schematic...
Most questions answered within 3 hours.
-
In the Chesapeake region during the mid-17th
century how similar was the experience of an independent...
asked 6 minutes ago -
. A 2.50 M stock solution was used to prepare a dilute NaOH
solution with a...
asked 59 minutes ago -
Write a program that reads in a text file, infile.txt, and
prints out all the lines...
asked 3 hours ago -
Which of the following orbits have a total of zero energy (based
on the common convention)?...
asked 3 hours ago -
Find the expected count and the contribution to the chi-square
statistic for the (Group 1, No)...
asked 4 hours ago -
Suppose you are purchasing a meal and with every meal a you
receive one of 10...
asked 4 hours ago -
A 75.0 kg 0erson is riding in a car moving at 20.0 m/s when the
car...
asked 4 hours ago -
What does Δp = QR mean in words?
Pushing a viscous fluid through a pipe requires...
asked 4 hours ago -
We know that system.out.println (“object number” + n ); is
legal.String name; int n; name =...
asked 4 hours ago -
Come up with a real-life problem (open-ended) and solve it by
designing and writing a Java...
asked 5 hours ago -
Power Music owns five music stores, where it sells music,
instruments, and supplies. In addition, it...
asked 5 hours ago -
True or false and
why:
Given the following sequence of numbers to be
inserted {4,5,6,1,2,3,8,7}, the...
asked 5 hours ago