Homework ( Air conditioning system )

I’m working on a Engineering question and need guidance to help me study.

Solve these two problems, which are in the Air conditioning system field. I attached the tables that you need to use to solve them.

1

Atmospheric air enters a cooling duct at 80°F and 80% relative humidity, at a rate of 10,000 cubic feet per minute. The air exits at 60°F and is saturated. The barometric pressure at the duct inlet is 15.0 psia. Assume no pressure drop through the cooling duct.

Determine (a)the rate at which heat is removed through the cooling coil [Btu/s], (b) the rate at which condensate forms [lbm/s]. Assume the condensed water is cooled to the exit air temperature before it drains from the system.

2

The air that exits the cooling duct enters a heating duct where it is heated at a rate of 500 Btu per second. Assume a 1.0 psi pressure drop through the heating duct.

At the heating duct exit, determine (a) the dry-bulb temperature [°F], (b) the relative humidity [%], and (c) the dew-point temperature [°F].

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