What is approach and range in cooling tower?

i) “Range” is the difference between the cooling tower water inlet and outlet temperature. ii) “Approach” is the difference between the cooling tower outlet cold water temperature and ambient wet bulb temperature.

What is meant by approach in cooling tower?

Cooling tower approach is the difference in temperature of the water entering the basin (cold) and the wet bulb temperature. For the purpose of tower design, a tower with a smaller approach (small delta between basin water temperature and wet bulb temperature) is considered superior.

What are cooling towers and how do they work?

Cooling towers are essentially large boxes designed to maximize evaporation of water. To do this, they contain material, typically PVC plastic sheets, that create large surface areas for water evaporation to occur. This material is what fills the inside of the cooling tower and is called “Cooling Tower Fill”.

What is cooling tower and its types?

There are three main types of cooling towers that are defined by how water or air pass through them. These types include crossflow, counterflow, and hyperbolic. There are also two varieties classified solely on airflow, known as induced draft and passive draft cooling towers.

What is WBT in cooling tower?

Wet Bulb Temperature (WBT): It is the theoretical lowest temperature that water can attain by evaporation. WBT is most important parameter in tower design and selection and can be measured through psychometric chart.

What is the condenser approach?

Condenser approach temperature is simply defined as the difference between the condenser liquid refrigerant temperature and the outlet condenser water temperature. The closer these temperatures are to each other, the more efficient the heat transfer.

What is a cooling tower used for?

Cooling towers are primarily used for heating, ventilation, and air conditioning (HVAC) and industrial purposes. Cooling towers provide a cost-effective and energy efficient operation of systems in need of cooling. More than 1,500 industrial facilities use large quantities of water to cool their plants 2.

What is the job of cooling tower?

What does a cooling tower do? As the name suggests, a cooling tower’s primary function is to lower temperatures – specifically of water, or ‘cooling water’ as it’s known at Drax. Power stations utilise a substantial amount of water in the generation of electricity.

What is inside a cooling tower?

Inside the towers the warm water is poured over what’s known as the cooling tower pack, a series of stacks of corrugated plastic that sit roughly 30 metres up the tower. The heat and the tower’s height create a natural draught. These small losses are replenished with water taken from the Ouse.

What is the difference between DBT and WBT?

Wet Bulb Temperature of Air (WBT): The wet bulb temperature of air is also measured by the ordinary thermometer, but the only difference is that the bulb of the thermometer is covered by the wet cloth. The difference between the DBT and WBT is called as wet bulb depression.

Why WBT is less than DBT?

Why WBT is lower than DBT? Wet bulb temperature (WBT or tw): When air is passed over the wet wick, moisture contained in the wick evaporates and cooling effect is produced at the bulb. Hence WBT is always less than DBT for unsaturated air and is equal to DBT for saturated air.

What is the chiller approach?

Condenser approach temperature is simply defined as the difference between the condenser liquid refrigerant temperature and the outlet condenser water temperature. High chiller approach temperatures usually mean reduced heat transfer, increased energy consumptions, and a reduction in refrigeration capacity.

What are the principles of cooling tower?

The basic working principle of cooling tower is to cool the hot water with the help of atmospheric air . Though it is widely used in different engineering sector and other refrigeration plant. The height of the cooling tower in thermal power plant is about 9 feet or above from the ground level.

What is the working principle in the cooling tower?

Cooling Tower Working The hot water from the power plants or industries is spread on the fills (heat exchanging surface) through the nozzles attached to the hot water pipe. The fills have hexagonal cavities on it that allow the spread water moves slowly downward. After cooling the hot water the air moves upward with vaporizing water.

What is a cooling tower and how does it work?

A cooling tower is a heat rejection device that rejects waste heat to the atmosphere through the cooling of a water stream to a lower temperature. Cooling towers may either use the evaporation of water to remove process heat and cool the working fluid to near the wet-bulb air temperature or,…

What exactly is a cooling tower?

A cooling tower is a heat rejection device that rejects waste heat to the atmosphere through the cooling of a water stream to a lower temperature.