Archive for the ‘Industrial’ Category
Cooling towers how do they work
Cooling tower or towers is a heat transfer system, which uses water from a stream or river in most cases, the water is transferred or forced over the hot equipment thus reducing the heat, the steam evaporates into the air through the cooling tower, much like if you put red hot steel into water it would be cooled rapidly causing steam but weakens the steel.
- Most used applications for cooling towers are manufacturing glass and electric power generation, some small cooling towers are made only to use a few gallons of water per minute, but in a power plant that uses the water to cool a massive system it uses hundreds of thousands of gallons per minute that are pumped through hugh pipes around 5 meters in diameter.
- In most cooling towers is a closed structure with pipes inside to supply warm water through networks of pipes a bit like a puzzle, the water is cooled down as it spills over the system causing a lot of steam then the water is collected below in like a dam like structure or a open water tank, then the whole process starts again, more water is pumped into the tank from the river or stream.
- An indirect, or sealed circuit cooling tower involves no lead contact of the sky and the liquefied, broadly articulating water or a glycol mixture, being cooled.
- Unlike the free-spoken cooling tower, the indirect cooling tower has couple separate liquefied circuits, one is an external circuit in which water is re circulated on the into the open of the second circuit, which is tube bundles (closed coils) which are joined combined to the process for the hot liquefied being cooled and returned in a sealed circuit. Air is drawn through the re circulated water cascading through the into the open of the hot tubes, delivering evaporated chilly interchangeable to an free-spoken cooling tower.
- In task the heat flows from the internal liquefied circuit, through the tube walls of the coils, to the external circuit and afterward by heating of the sky and evaporation of numerous of the water, to the atmosphere.
- Operation of the indirect cooling towers is thus very interchangeable to the free-spoken cooling tower with one exception, the process liquefied being cooled is contained in a “closed” circuit and is not straight away uncovered to the blue sky above or the re circulated external water.
- Many people believe the the smoke coming out of a cooling tower is pollution, but it is simply steam as water is heated up it makes a lot of steam causing pure water in very fine mist to travel upward into the sky, much like how rain in made when water is heated from the sea then is cooled down in the clouds.
Coolant filtration
Recycle or filter your coolant can save you a fair bit of money, up to 
50%-90% of costs, filtration will filter chips and very fine particles, some filters cost a fair bit over $3000 but they will filter very small particles low as 0.5 micron
The filtration system will vary according to what you might be cutting, grinding, or drilling steel, plastic, brass etc.
Good thing about Coolant filtration,
1. you and your machine shop will save more money.
2. less impact on the environment we live in.
3. Speed up production as you wont need to keep changing the coolant in your machines so often.
4. Product quality is enhanced due to good coolant
5. The filtration can be that good these days it will get rid of bacteria and bad odor that grows in contaminated coolant.
Types of filters there are many types, pressure, vacuum, gravity, magnetic and bag filters, the way we used to do Coolant filtration was in deep pits with a slopping trench, times have changed as the new filtration system of today is located on the factory floor, but needs to be double lined due to environment regulations, the good thing about having the filtration system on the floor is its much easier to get to and if you ever need to move any machines its a quick job done easy.