Question
In: Mechanical Engineering
In an industrial process, it is required to maintain 30°C dry bulb temperature with high relative...
In an industrial process, it is required to maintain 30°C dry bulb temperature with high relative humidity equals to 60%. Determine the following air properties when the barometric pressure is standard, a) Dew point temperature; b) Specific humidity; c) Enthalpy of mixture per kg of dry air. d) Vapour density; e) Degree of saturation; f) Wet bulb temperature.
Solutions
samet mamat answered 1 year agoRelated Solutions
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...
300% excess air having a dry bulb temperature of 25 degree celsius and relative humidity of...
300% excess air having a dry bulb temperature of 25 degree
celsius and relative humidity of 60% is used to fully combust 1
kg/hr of methane in a boiler and the heat of reaction is used to
generate steam. Hot water enters the boiler as a saturated liquid
at 102 degree celsius and leaves as superheated at 40 bar and 400
degree celsius.
The combusted gases leave the boiler at 450 degree celsius and
are then cooled to 25 degree...
Moist air at 55 oF dry bulb temperature and 40% relative humidity is first heated through...
Moist air at 55 oF dry bulb temperature and 40% relative
humidity is first heated through a heating coil. The air is then
adiabatically humidified by saturated water vapor at 4.5 psia. The
exit air has a dry bulb temperature of 90 oF and wet bulb
temperature 65 oF. Air is supplied at a volume flow rate of 478.5
cfm. Assume sea level pressure throughout. Determine the
following.
a) Show the inlet and outlet air condition clearly on the
psychrometric...
Air with a dry bulb temperature 75 F and a wet bulb temperature 65 F is...
Air with a dry bulb temperature 75 F and a wet bulb temperature
65 F is at a sea level pressure of 14.7 psia. Using equations to
calculate (a) humidity ratio, (b)
the relative humidity of the air, (c) enthalpy,
(d) dew point, and (e) the mass
density of the dry air. (50)
USE EXCEL OR MATLAB IF YOU NEED Given the dry-bulb temperature, Tdb and relative humidity, Φ,...
USE EXCEL OR MATLAB IF YOU NEED
Given the dry-bulb temperature, Tdb and
relative humidity, Φ, the wet-bulb, Twb
temperature may be calculated from the psychrometric equation
(Jones, 1994):
PvsΦ – Pss =
PatmA (Twb
-Tdb )
(1)
Use your input from the Table below.
The input Twb and Tdb are in oC
(used in Eqs. (2) and (3) in Kelvin).
Pss = saturated vapor pressure at
Twb (kPa)
Pvs = saturated vapor pressure at
Tdb (kPa)
Pss =...
Steam at 100°C is blown into an airstream at 21°C dry bulb, 50% saturation (Relative humidity),...
Steam at 100°C is blown into an airstream at 21°C dry bulb, 50%
saturation (Relative humidity), at the rate of 1 kg steam/150 kg
dry air. What is the final condition and show the process on the
psychrometric chart? (Ans. Final moisture content (W2 = 0.0148
kgv/kg ; Final dry bulb temperature Tdb2=22.02°C ).
The air in a room has a pressure of 1 atm, a dry-bulb temperature of 24°C,...
The air in a room has a pressure of 1 atm, a dry-bulb
temperature of 24°C, and a wetbulb temperature of 17°C. Using the
psychrometric chart, determine
(a) The specific humidity,
(b) The enthalpy, in kJ/kg dry air,
(c) The relative humidity,
(d) The dew-point temperature,
and (e) The specific volume of the air, in m3/kg dry air.
Air entering a dryer has a temperature (dry bulb) of 60°C and a dew point of...
Air entering a dryer has a temperature (dry bulb) of 60°C and a
dew point of 26.7°C. Using the humidity chart, determine the actual
humidity H, percentage humidity HP, humid heat cS and humid volume
vH.
Air enters a counter-flow drier at 70˚C dry bulb temperature and 20˚C dew point temperature. Air...
Air enters a counter-flow drier at 70˚C dry bulb temperature and
20˚C dew point temperature. Air leaves the drier at 40˚C and 60%
relative humidity. The initial moisture content of the product is
82% (wet basis). The amount of air moving through the drier is
2000kg of dry air per hour. The mass flow rate of the product is
10kg dry solid per hour. What is the final moisture content of the
dried product in wet basis?
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