Table of Contents
What is a drift eliminators?
A drift eliminator can be defined as equipment containing a complex system of baffles designed to minimise drift discharging from a cooling tower or evaporative condenser. Today they are predominantly manufactured using either PVC or polypropylene (PP) material although some towers may still have metal type versions.
What is the function of eliminator?
Drift eliminators are designed to prevent large water droplets from escaping via the cooling tower air stream. They do this by forcing the droplets caught in the stream of air to causing a change in direction which reduces their velocity. They are directed into the blade walls and run back down into the tower.
What is the function of drift?
A drift eliminators function relies on inertial impact of the water droplets on the walls of the drift eliminator due to the changing direction of airflow through the eliminator. When the droplets impact the side walls, they are removed from the airstream and run back into the cooling tower.
What is draft eliminator in cooling tower?
Cooling tower drift eliminators and heavy duty/dura drift eliminators are designed to remove droplets of water from the air and minimize loss of process water. This process causes the water to become separated from the air and put back into the cooling tower.
What is drift loss?
Drift is water lost from cooling towers as liquid droplets are entrained in the exhaust air. The drift loss is independent of the water lost by evaporation and may be expressed in units of lb/hr or percentage of circulating water flow. Cooling tower drift eliminators are used to control this drift loss from the tower.
How does a cooling tower dissipate heat?
Cooling towers dissipate heat from recirculating water used to cool chillers, air conditioners, or other process equipment to the ambient air. Heat is rejected to the environment from cooling towers through the process of evaporation. Therefore, by design, cooling towers use significant amounts of water.
What is cooling tower fill?
The principle of operation of cooling tower fill is to put as much water surface area in contact with as much air as possible, for the longest amount of time possible. Film fills allow the water to form thin flowing sheets to expose as much water surface area as possible to the interacting flow.
What is the drift term?
For a random walk with drift, the best forecast of tomorrow’s price is today’s price plus a drift term. One could think of the drift as measuring a trend in the price (perhaps reflecting long-term inflation). Given the drift is usually assumed to be constant. Related: Mean reversion.
What is drift stochastic process?
In probability theory, stochastic drift is the change of the average value of a stochastic (random) process. A related concept is the drift rate, which is the rate at which the average changes. For example, a process that counts the number of heads in a series of. fair coin tosses has a drift rate of 1/2 per toss.
What causes cooling tower drift?
Cooling tower drift are small water droplets that are emitted from cooling towers. As air moves up the tower, it entrains a fraction of the sprayed water droplets outside of tower and into the ambient.
What is cooling tower drift rate?
The latest technology often can achieve 0.001\% drift rate, down to 0.0005\% drift rate depending on tower configuration. To put that into context, for 1,000 gpm (63 l/s) water flow rate, predicted drift volume is approximately 1 ounce (30 ml) per minute.
Drift (or windage) is the term for water droplets of the process flow allowed to escape in the cooling tower discharge. Drift eliminators are used in order to hold drift rates typically to 0.001–0.005\% of the circulating flow rate.
What is cooling tower drift?
Cooling Tower Drift Eliminators. This process causes the water to become separated from the air and put back into the cooling tower. Drift eliminators limit the amount of circulating water emitting from the tower’s exhaust.
What is an AC cooling tower?
AC Cooling Towers: As the water is flowing down the flow plates air is pulled through the plates and over the water where it releases heat through evaporation. After the water has released the heat it is then pumped back through piping to a chiller barrel where it absorbs more heat and then returns to the cooling tower.
What are HVAC cooling towers?
Cooling Tower in HVAC. Cooling tower is a peripheral equipment that removes heat from the hot water that is pumped from the condenser to the tower. It is done by using the air from the surrounding to reduce the temperature of the water. The air can be natural or forced by the use of fan.