Given: P=1 atm T=22 f=0.7 (70%) 1) Using the psychrometric chart for 1atm (Page

Question

Given:

P=1 atm

T=22

f=0.7 (70%)

1) Using the psychrometric chart for 1atm (Page 1030 Michael J. Moran, Fundamentals of Engineering Thermodynamics 8th Ed.)

Obtain:

-dew point temperature Tdp

-adiabatic saturation temperature Tas

-specific humidity ?

-specific volume v

-specific enthalpy h

2) Using the equation given in class and the tables for air and the tables for saturated vapor (or EES to compute values using property water and air).

For the Tas :

– a) find it using the equations given in class an doing a manual iteration

– b) write the equation to be solved in EES and get a numerical solution for the adiabatic saturation temperature

Explanation / Answer

Given:

P=1 atm

T=22

f=0.7 (70%)

1: dew point temperature Tdp from psychrometric chart

Tdp= 16.309 0C

2: adiabatic saturation temperature Tas

Tas=

3: specific humidity =0.01157 kg/kg of dry air

4: specific volume v=0.8507 m3/kg

5: specific enthalpy h =51.5347 kJ/kg

for Tas calculation

from the above given formula calculated value of Tas after putting all the values is given below

Tas= 15 C

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