At sea level, a flow of 2000 efm of fresh clean outdoor air enters the fan 1 at

Question

At sea level, a flow of 2000 efm of fresh clean outdoor air enters the fan 1 at 32 F and RH of 10%. Both blow through fans (Fan I and 2), each increases the temperature by 2F. The heat transfer rate at the furnace is 380,000 and at the preheat coil is 60,000 Btu/hr. The return air is 70F db and with relative humidity of RH = 40% (These arc the conditioned space data) The supply air is 115F db and RH = 20%. The volume flow rate (efm) of fresh air is 16% of the supply air volume flow rate. Show the correct direction of the heal transfer rate for the space on the illustrated schematic. Find all points 0 to 8 on the chart and show all the lines on the chart and the protractor. Find SHF of the space and show its line on protractor and how you found/calculated it. Find all Air Mass flow rates and Temperature of each point from 0 to 8. How much hot water vapor is added in the humidifier? Give the mass flow rate of the water vapor, the heat transfer rate of the humidifier, and draw the line for i_w (the Btu/Lb).

Explanation / Answer

The answer of following question is as follows.

The direction of heat flow is towards out of the system.

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