6-min solutions - problem 68

[mot14]

Where does "n=0.93'" come from for the constant condition?

Thank you in advance...

 

[ikesdsu]

Which of the three 6-minute solution book?

 

[mot14]

Sorry, the mechanical T&F book....

 

[ikesdsu]

I unforunately took the HVAC test so I can't tell you for sure but if I guess i would think it is factor that you have to assume for the efficiency losses in the equipment but don't quote me on that.