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In: Civil Engineering
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?
Solutions
thaaankyou
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Ally Wells answered 1 year agoRelated Solutions
At 200 C relative humidity of 1 m3 of air is 60%. when temperature is kept...
At 200 C relative humidity of 1 m3 of air
is 60%. when temperature is kept constant and volume is reduced to
0.25 m3 find the mass of moist air that would be
condensed.
SVP of water at 200 C = 17.5mmHG R= 8.31 J
mol-1 K-1
In a low temperature drying system, air at 60°C and 10% Relative humidity passes over a...
In a low temperature drying system, air at 60°C and 10% Relative
humidity passes over a bed of diced carrots at 20 kg-dry air/sec.
The rate of water removal from the carrots Is measured by
difference in total weight over time and found to be approximately
.16 kg-water/sec. In the system described above, calculate the
temperature and relative humidity of the air exiting the drying
system.
The atmospheric air 32 °C dry bulb temperature and 70% relative humidity supplied to the cooling...
The atmospheric air 32 °C dry bulb temperature and 70% relative
humidity supplied to the cooling coil at a rate of 45m3 /min. The
air cooling to the saturated state and leaving at a temperature of
16 °C. Determine: () a- Specific humidity at each state. b- Wet
bulb and dew point temperatures at the final state c- Final
relative humidity. d- Mass of water condensed. e- Rate of heat
removed from the air in kW. f- Show the process...
The atmospheric air 32 °C dry bulb temperature and 70% relative humidity supplied to the cooling...
The atmospheric air 32 °C dry bulb temperature and 70% relative
humidity supplied to the cooling coil at a rate of 45m3 /min. The
air cooling to the saturated state and leaving at a temperature of
16 °C. Determine: (10 points) a- Specific humidity at each state.
b- Wet bulb and dew point temperatures at the final state c- Final
relative humidity. d- Mass of water condensed. e- Rate of
heat removed from the air in kW. f- Show the...
Moist air enters an adiabatic humidifier system at 1 atm, 15 °C, with a relative humidity...
Moist air enters an adiabatic humidifier system at 1 atm, 15 °C,
with a relative humidity of 20%. The volumetric flow rate of the
incoming moist air is 150 m3/min. Saturated water vapor at 1 atm is
injected into the flow such that the outlet temperature is 30 °C
and the outlet relative humidity is 40%. The pressure is constant
in the humidifier system. Determine the mass flow rate of the
saturated water vapor entering the humidifier at state 3,...
Air at a temperature of 20 0C and 750 mm Hg has a relative humidity of...
Air at a temperature of 20 0C and 750 mm Hg has a relative
humidity of 80%. Calculate,
(i)The molal humidity of the air
(ii)The molal humidity of this air if its temperature is reduced
to 10 °C and pressure increased to 2000 mm Hg condensing out some
of the water
(iii)Weight of water condensed from 1000 litre of the original
wet air
Vapour pressure of water at 20 °C =
17.5 mm Hg
Vapour pressure of water at 10...
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.
Air at 38.0°C and 99.0% relative humidity is to be cooled to 16.0°C and fed into...
Air at 38.0°C and 99.0% relative humidity is to be cooled to
16.0°C and fed into a plant area at a rate of 510.0
m3/min. You may assume that the air pressure is 1 atm in
all stages of the process.
Calculate the rate the water condenses in kg/min.
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
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basis) at an inlet flow rate...
15 m3 /min of air at 104o F and 60% relative humidity is cooled to 59o...
15 m3 /min of air at 104o F and 60% relative humidity is cooled
to 59o F and 100% relative humidity, and then reheated to 68o F.
Find the following:
a. The flow rate of dry air (BDA) in kg /min.
b. The amount of water condensed during cooling stage.
c. kW of power needed for cooling the air in the cooling
stage.
d. kW of power needed for the heating step.
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