answer all What is the summer design dry bulb temperature in

answer all

What is the summer design dry bulb temperature in NYC using the 97.5% criteria? 88/71 degree F 90/73 degree F 84/72 degree F 84/71 degree F What is the COP for a 400-ton chiller operating at 0.75 kw peer ton? 5.7 4.7 2.7 3.0 What is the MAXIMUM recommended face velocity for cooling coils in fpm? 200 400 600 1200 Which of the following is the highest performances filter? UEPA HEPA Medium Low

Solution

12. 1000 cfm.

for a single person cfm= 20.

therefor for 50 persons cfm=20*50=1000

13. 88/71°F

14. 4.7

kilo watt/ tonn= 12/(cop*3.14)

cop = 12/((kw/T)*3.14)

= 12/(0.75*3.14) = 4.7

15.400

16.HEPA.

High efficiency particulars air filters are the most efficient filters