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I am looking for a formula where I can find the relative humidity (RH) of air...
I am looking for a formula where I can find the relative humidity (RH) of air after being compressed. I am given the RH, input and output temperature, and input and output pressure. It is assumed that the compressed air is hotter after compression, using constant volume ideal gas law. Any help appreciated.
Solutions
Amanda K answered 9 months agoRelated Solutions
If at 30F the air has 25% relative humidity, what is the relative humidity at 70F...
If at 30F the air has 25% relative humidity, what is the
relative humidity at 70F and how much moisture must be added to get
it up to 50% relative humidity.
A polymer chemist studied the effect of relative humidity (RH) on the weight of molded parts...
A polymer chemist studied the effect of relative humidity (RH)
on the weight of molded parts made from a polymer material. The
chemist believes that any weight differences greater than 5 will
have a impact on the end use of the molded part. Use the data from
the study, provided below, to state conclusions about the effect of
relative humidity on the average and variability of the
weight.
70% RH
22.5, 24.2, 24.5, 29.2, 27.5, 24.5, 26.5, 23.5, 25.5, 27.0,...
I need answers on 3.2.4 3.2.3 If the air temperature is 15°C and the relative humidity...
I need answers on 3.2.4
3.2.3 If the air temperature is 15°C and the relative humidity
35 percent, calculate the vapor pressure, specific humidity, and
air density. Assume standard atmospheric pressure (101.3 kPa).
3.2.4 Solve Prob. 3.2.3 if the air temperature rises to 300C. By
what percentage does the specific humidity increase as a result of
the temperature rise from 15 to 300C?
Relative humidity isn't everything. Why is it that outdoor air of 80 Fo at 55% humidity...
Relative humidity isn't everything. Why is it that outdoor air
of 80 Fo at 55% humidity will feel more “muggy” than a 50 Fo cave
at 75% humidity? What other parameter is a better measure of the
actual amount of moisture in the air, and how do we define it? Then
give two examples of when keeping close track of moisture in the
air is important.
Relative humidity isn't everything. Why is it that outdoor air of 80 Fo at 55% humidity...
Relative humidity isn't everything. Why is it that outdoor air
of 80 Fo at 55% humidity will feel more “muggy” than a 50 Fo cave
at 75% humidity? What other parameter is a better measure of the
actual amount of moisture in the air, and how do we define it? Then
give two examples of when keeping close track of moisture in the
air is important.
Air enters an air conditioning unit at 32oC, 80% relative humidity, and with a mass flowrate...
Air enters an air conditioning unit at 32oC, 80% relative
humidity, and with a mass flowrate of 12 kg/min. It is to be
conditioned to 25oC and 50% relative humidity. In order to do this,
part of the moisture in the air must be removed as condensate at
30oC. Be able to draw the path that the atmospheric air takes on
the psychrometric chart. Find
a. The rate of moisture removal from the air, mw
b. The rate of...
Air enters a window air conditioner at 1 atm, 36oC and 75% relative humidity (??) at...
Air enters a window air conditioner at 1 atm, 36oC
and 75% relative humidity (??) at a rate of 12m3/min and
it leaves as saturated air at 18oC. Part of the moisture
in the air which condenses during the process is also removed at
18oC. Determine (a) the rate of heat
(Q?) and (b) moisture removal from the air. (c)
What-if Scenario: What would the rate of heat
removal be if moist air entered the dehumidifier at 95 kPa instead...
An air conditioning system is to take outdoor air at 30 oC and 70% relative humidity...
An air conditioning system is to take outdoor air at 30
oC and 70% relative humidity at a steady rate of 10
m3/s and to condition it to 25 oC and 50%
relative humidity. The outdoor air is first cooled down to 13.9
oC using cooling coil and then heated to the desired
condition in the heating section. Assuming the air is at 1 atm
pressure,
Draw the air conditioning process on the attached psychometric
chart.
Determine the mass flow...
Air at 35°C and 33% relative humidity is used for drying a food product. The air...
Air at 35°C and 33% relative humidity is used for drying a food
product. The air is first heated to 90°C and then cooled
adiabatically to an exit dry bulb temperature of 40°C. (a) How much
moisture did the air pick up? (b) Calculate the change in enthalpy
from the initial unheated air to the final moist air. (c) If the
food is dried from 85% moisture to 20% moisture (both on a wet
basis) at an inlet flow rate...
The following data refer to the SO2 concentration-time (t), temperature (T), relative humidity (RH), and atmospheric...
The following data refer to the SO2 concentration-time (t),
temperature (T), relative humidity (RH), and atmospheric pressure
(P) in the last 12 months:
Average monthly
concentration (ppb)
Time
Temperature
RH (%)
Atmospheric
pressure (mb)
10.3
1
14
31
980
9.9
2
17
42
1010
9.4
3
21
52
1003
10.6
4
28
63
1020
10.1
5
33
74
990
14.3
6
35
88
1050
13.3
7
36
84
1070
8.2
8
35
86
1025
8.8
9
32
90
995
9.1...
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