Question

Need in hurry please

During a record-breaking heat spell, the air cooler unit for your oil processing facility goes down. Luckily, the processing equipment doesn't stop, but it does get hot in there. By the time the air cooler is fixed, the temperature in your facility has risen to 92°F. Air flows into the facility from the fixed cooler at a temperature of 75°F. The flowrate of air into and out of the facility is the same, 75 ft/min. Your facility is 810,000 ft', and most of the space (you may assume all) is occupied by air. The facility is insulated pretty well, so there is very little (you may assume none) heat transfer through the walls/doors/windows. This means the air temperature inside the facility only changes due to the cool air flowing in, mixing with existing air, and exiting. The fans are strong enough that you may assume that the air is well mixed and the temperature inside the facility is the same everywhere. The heat capacity at constant pressure (Cp) of air is approximately 29x10 kJ/mol°C and the ratio of specific heats Cp/Co=1.4. Facility 810,000 ft 75 ft/min Air 75°F Air 75 ft/min Air TF T'F a. Set up the balance you need to determine how long will it take for the temperature to get down to a bearable 80°F. DO NOT SOLVE FOR ANY NUMBERS. For each constant in your balance, state briefly how you would get the value needed. Then explain how you would solve the balance, but do not solve it. (12 pts)

Answer 1

Bloooo ff 75% 75 P. 75F T Ti of V=910000 fps 0-75 ft Amin To=98°F Tin=767 Assume Constant to Air & G Constant (Rote of Energy in)-( (Rote of Energy out) = (Accum Pag (Tin-Tim) - PUC (T-Tin) = NPC di -Puli (7-Tin)-1 Poul at dt-

temp of To iminal Chamber fit inlet Density of A P R Tin PM to-outlet Denst of Ani po = RTO PM The bdonie will be solved ba voricble Seberable melhool limits To tolk & b/ Chomber he con asum- lic t ant Ait Density Temp Tin Pin = Pour Constant

USING GIVEN DATA AND ENERGY BALANCE ON SYSTEM WE CAN FIND THE REQUIRED ode

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