THERMAL CAPACITY:

Cooling capacity of the cooling tower that it can achieve as water quantity (m3/h)

COOLING RANGE:

The temperature difference between the temperature of the water entering into the cooling tower and leaving the tower.

APPROACH CLEARENCE:

The temperature difference between the temperature of the water leaving the cooling tower and the temperature of wet bulb temperature of air. When the tower is designed, the approach clearance is an important factor in terms of tower bigness and cost detection. 

DRAG LOSS:

It is the water amount that is discharged into the atmosphere with the air flow. Water droplets are discharged into the atmosphere along with air drawn. The drag loss does not include the water amount lost with evaporation . Drag loss can be minimized with the appropriate tower design. Drag should be controlled because as different from water loss, drag event may damage environment as water includes chemicals and other dirt materials. 

HEAT LOAD:

Heat amount that is discharged from circulation water in the cooling tower (kcal / h). Heat load are the important factors determining the size and cost. 

WET THERMOMETER TEMPREATURE:

It is the lowest temperature that water theoretically reach with evaporation . As cooling is done with the evaporation , wet thermometer temperature is a very important factor that affect tower selection and design 

DRY THERMOMETER TEMPREATURE:

It is the temperature of the air entering the cooling tower. 

SURROUNDING TEMPERATURE – ENVIRONMENT TEMPREATURE:

It is the dry thermometer temperature of the air that is measured with the thermometer. 

PUMP HIGNESS:

It is the pressure that is needed for repumping the cooled water to the system and again to the tower.

REINFORCEMENT WATER (MAKE UP):

It is the water amount required for reinforcing the water amount lost with blowdown, drift and the amount of water lost by evaporation.

BLOWDOWN LOSS:

Soluble solid material concentration of the water is discharged to some part of the circulation water to be able to keep the water under valid limits. As a result of the evaporation , melted solid material concentration will continuously increase if blowdown is not done. 

RELATIVE HUMIDTY:

It is maximum humidity amount that humidity amount available in the air mass at a specific temperature can take at that temperature. Relative humidity gives saturation ratio to the humidity or humidity clearance. 

RECIRCULATION:

It is the stem that was thrown to the atmosphere during the cooling process reentering into the tower from the clean air intake part.