Part$-$II $(80$ Points$)$ An adiabatic cooling tower is used to reduce the temperature of water from

$40C$ to $25C.$ Air enters the bottom of the tower at $20C$ and a relative humidity of $50\%.$

Air exits the top of the tower at $32C$ and a relative humidity of $95\%.$ The mass flow rate of

the water which enters the tower is $10,000kg$ per minute.

a$)(10$ pt$.)$ Plot the flow diagram of the cooling tower process.

b$)(20$ pt$.)$ Write the mass and energy balances at steady state conditions $($state your

assumptions$).$

c$)(40$ pt$.)$ Estimate mass flow rate of air entering the cooling tower and water which

leaves the cooling tower with air.

d$)(10$ pt$.)$ Find the efficiency of the tower and state the $($five$)$ factors that affect the

cooling tower efficiency.

Data:

$h_{\text{w}\text{a}\text{t}\text{e}\text{r}}(25C)=104\mathrm{.}8k\frac{J}{k}g$

$h_{\text{w}\text{a}\text{t}\text{e}\text{r}}(40C)=167\mathrm{.}5k\frac{J}{k}g$ PLEASE SOLVE BY HANDWRITING AND DO NOT COPY!