# IZMIR INSTITUTE OF TECHNOLOGY

```IZMIR INSTITUTE OF TECHNOLOGY
MECHANICAL ENGINEERING DEPARTMENT
COOLING TOWER EXPERIMENT
Lab: Chemical Engineering Building, Z06 Lab.
Research Assistant: Nurdan Yıldırım &Ouml;zcan
Purpose of the experiment
Aim of this experiment is to give students an appreciation of the construction, design and
operational characteristics of a modern evaporative cooling system. The cooling tower is also
an excellent example of an “open system” through which two streams of fluid flow (water and
air) and in which there is a mass transfer from one stream to the other.
Figure 1: Cooling tower flow diagram.
DESCRIPTION
Water Circuit:
Warm water is pumped from the load tank through the control valve and water flow meter to
the column cap. After its temperature is measured, the water is uniformly distributed over the
top packing deck and, as it spreads over the plates, a large thin film of water is exposed to the
air stream. During its downward passage through the packing, the water is cooled, largely by
the evaporation of a small portion of the total flow.
Collected data will be given to you in Excel format. First of all you will plot the following
graphs.
 Fuel flow vs time
 Boiler temperature vs time
 Boiler pressure vs time
 Turbine inlet/outlet pressure vs time
 Turbine inlet/outlet temperature vs time
 Generator dc amps output vs time
 Generator dc voltage output vs time
 Turbine rpm vs time
In the graphs you will choose a steady state period for 5-10 minutes. For this period note the
following data to be able to use in calculations:
 Atmospheric pressure
 Initial boiler fill amount
 Fuel flow
 Boiler pressure
 Turbine inlet pressure
 Turbine inlet temperature
 Turbine outlet temperature
 Turbine outlet pressure
For analysis assume a steady state, steady flow condition. Changes in kinetic and potential
energy are negligible. Calculate the listed data above:

Heat flow out of boiler

Work rate of the turbine

Efficiency of electric generator

Heat flow rate out of the system at the condenser

Condenser efficiency

Total system efficiency
```