Shopping on line can be easy, simple and save you lots of money. It can also take a lot of your time, frustrate you, and result in unwanted purchases. Now the same can be said for regular high street shopping, but with the vast opportunity presented by the Internet it will pay you to spend a few minutes reading this and understanding how to better optimize your Coolant shopping experience:
1. Compare - without doubt the biggest advantage that the Coolant offers shoppers today is the ability to compare thousands of Coolant at a time. This is a great thing, but not necessarily all the time! Too much can be daunting at times so take advantage of the great comparison sites and where possible let them do the hard work for you.
2. Research - if it has been said it will be on the internet. Ignorance is no longer a justifiable reason for buying the wrong thing. Take the time to research in detail everything that you could possible want to know about
3. Testimonials - don't know anybody that has bought a Coolant? Wrong! If the Coolant is good the internet will let you know. Use the Internet as a friend and get testimonials before you buy.
4. Questions - Got a question about Coolant then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....
5. Reputation - Never heard of the company selling Coolant? Don't worry, no reason why you should know every company in the world, but you know someone that does! Use the internet to find out what people are saying about Coolant and build up a picture of their reputation for sales, returns, customer service, delivery etc.
6. Returns - still worried that even after all of the above your Coolant wont be what you want? Check out the returns policy. There is so much competition now that someone, somewhere is bound to offer the terms that you are comfortable with.
7. Feedback - happy with your Coolant then let people know, after all you are depending on others people input in your buying decision, so why not give a little back.
8. Security - check for the yellow padlock on the Coolant site before you buy, and the s after http:/ /i.e. https:// = a secure site
9. Contact - got a question about Coolant, or want to leave a comment then check out the sites contact page. Reputable companies have them and respond.
10. Payment - ready to pay for your Coolant, then use your credit card or PayPal! Be aware of companies that don't accept them, there may be genuine reasons but given the huge amount of choice you have when buying online there is no reason at all not to buy via credit card or PayPal.
A
coolant, or
heat transfer fluid, is a fluid which flows through a device in order to prevent its overheating, transferring the heat produced by the device to other devices that utilize or dissipate it. An ideal coolant has high thermal capacity, low viscosity, is low-cost, and is chemically inert, neither causing nor promoting corrosion of the cooling system. Some applications also require the coolant to be an electrical Electrical insulation.
The coolant can either keep its phase and stay liquid or gaseous, or can undergo a
phase change, with the
latent heat adding to the cooling efficiency. The latter, when used to achieve low temperatures, is more commonly known as refrigerant.
Gases
Earth's atmosphere is a common form of a coolant.
Air cooling uses either convection airflow (passive cooling), or a forced circulation using fan (mechanical).
Inert gases are frequently used as coolants in gas-cooled
nuclear reactors. Helium is the most favored coolant due to its low tendency to absorb neutrons and become radioactive. Nitrogen and carbon dioxide are frequently used as well.
Sulfur hexafluoride is used for cooling and insulating of some high-voltage power systems (
circuit breakers, switches, some
transformers, etc.).
Steam can be used where high specific heat capacity is required in gaseous form and the corrosive properties of hot water are accounted for.
Liquids
The most common coolant is
water. Its high heat capacity and low cost makes it a suitable heat-transfer medium. It is usually used with additives, like corrosion inhibitors and antifreezes.
Antifreeze (coolant), a solution of a suitable organic chemical (most often ethylene glycol,
diethylene glycol, or
propylene glycol) in water, is used when the water-based coolant has to withstand temperatures below 0 °C, or when its boiling point has to be raised.
Very pure deionized water, due to its relatively low electrical conductivity, is used to cool some electrical equipment, often high-power transmitters.
Heavy water is used in some nuclear reactors; it also serves as a
neutron moderator.
Oils are used for applications where water is unsuitable.
- Mineral oils serve as both coolants and lubricants in many mechanical gears. Castor oil is also used.
- Silicone oils are favored for their wide range of operating temperatures. However their high cost limits their applications.
- Fluorocarbon oils are used for the same reasons.
- High-power electric transformers use transformer oil for cooling and additional electric insulation.
Cutting fluid is a coolant that also serves as a
lubricant for metal-shaping
machine tools.
Liquid
fusible alloys can be used as coolants in applications where high temperature stability is required, eg. some fast breeder nuclear reactors.
Sodium or sodium-potassium alloy
NaK are frequently used; in special cases lithium can be employed. Another liquid metal used as a coolant is
lead, in eg.
lead cooled fast reactors, or a lead-bismuth alloy. Some early
fast neutron reactors used Mercury (element).
For very high temperature applications, eg. molten salt reactors or
very high temperature reactors, molten salts can be used as coolants. One of the possible combinations is the mix of sodium fluoride and sodium tetrafluoroborate (NaF-NaBF4).
Freons were frequently used for immersive cooling of eg. electronics.
Refrigerants are coolants used for reaching low temperatures by undergoing phase change between liquid and gas. Halomethanes were frequently used, most often
R-12 and
R-22, but due to environmental concerns are being phased out, often with
liquified petroleum gas#LPG as refrigerant or other haloalkanes like R-134a. Anhydrous
ammonia is frequently used in large commercial systems, and sulfur dioxide was used in early mechanical refrigerators.
Carbon dioxide (R-744) is used as a working fluid in climate control systems for cars, residential air conditioning, commercial refrigeration, and vending machines.
Heat pipes are a special application of refrigerants.
Liquid gases are used as coolants for
cryogenic applications, namely applications using
superconductors, or extremely sensitive sensors and very low-
noise amplifiers. The most common and least expensive coolant in use is liquid nitrogen. Liquid air is used to lower degree, due to its oxygen content which makes it prone to exploding in contact with combustible materials. Lower temperatures can be reached using liquefied
neon. The lowest temperatures, used for the most powerful superconducting magnets, are reached using liquid helium.
Fuels are frequently used as coolants for engines. A cold fuel flows over some parts of the engine, absorbing its waste heat and being preheated before combustion.
Kerosene and other
jet fuels frequently serve in this role in aviation engines,
liquid hydrogen is used to cool nozzles and chambers of
rocket engines.
See also
External links
- CO2 as a natural coolant — FAQs
A
coolant, or
heat transfer fluid, is a fluid which flows through a device in order to prevent its overheating, transferring the heat produced by the device to other devices that utilize or dissipate it. An ideal coolant has high thermal capacity, low viscosity, is low-cost, and is chemically inert, neither causing nor promoting
corrosion of the cooling system. Some applications also require the coolant to be an electrical
Electrical insulation.
The coolant can either keep its phase and stay liquid or gaseous, or can undergo a phase change, with the
latent heat adding to the cooling efficiency. The latter, when used to achieve low temperatures, is more commonly known as
refrigerant.
Gases
Earth's atmosphere is a common form of a coolant. Air cooling uses either convection airflow (passive cooling), or a forced circulation using fan (mechanical).
Inert gases are frequently used as coolants in gas-cooled nuclear reactors.
Helium is the most favored coolant due to its low tendency to absorb neutrons and become radioactive.
Nitrogen and carbon dioxide are frequently used as well.
Sulfur hexafluoride is used for cooling and insulating of some high-voltage power systems (circuit breakers, switches, some
transformers, etc.).
Steam can be used where high
specific heat capacity is required in gaseous form and the corrosive properties of hot water are accounted for.
Liquids
The most common coolant is
water. Its high
heat capacity and low cost makes it a suitable heat-transfer medium. It is usually used with additives, like corrosion inhibitors and antifreezes.Antifreeze (coolant), a solution of a suitable organic chemical (most often
ethylene glycol,
diethylene glycol, or propylene glycol) in water, is used when the water-based coolant has to withstand temperatures below 0 °C, or when its boiling point has to be raised.
Very pure deionized water, due to its relatively low electrical conductivity, is used to cool some electrical equipment, often high-power transmitters.
Heavy water is used in some nuclear reactors; it also serves as a
neutron moderator.
Oils are used for applications where water is unsuitable.
- Mineral oils serve as both coolants and lubricants in many mechanical gears. Castor oil is also used.
- Silicone oils are favored for their wide range of operating temperatures. However their high cost limits their applications.
- Fluorocarbon oils are used for the same reasons.
- High-power electric transformers use transformer oil for cooling and additional electric insulation.
Cutting fluid is a coolant that also serves as a lubricant for metal-shaping machine tools.
Liquid
fusible alloys can be used as coolants in applications where high temperature stability is required, eg. some fast breeder nuclear reactors.
Sodium or sodium-
potassium alloy NaK are frequently used; in special cases lithium can be employed. Another liquid metal used as a coolant is lead, in eg. lead cooled fast reactors, or a lead-
bismuth alloy. Some early
fast neutron reactors used
Mercury (element).
For very high temperature applications, eg.
molten salt reactors or very high temperature reactors, molten
salts can be used as coolants. One of the possible combinations is the mix of
sodium fluoride and sodium tetrafluoroborate (NaF-NaBF4).
Freons were frequently used for immersive cooling of eg. electronics.
Refrigerants are coolants used for reaching low temperatures by undergoing phase change between liquid and gas.
Halomethanes were frequently used, most often
R-12 and
R-22, but due to environmental concerns are being phased out, often with
liquified petroleum gas#LPG as refrigerant or other haloalkanes like
R-134a. Anhydrous
ammonia is frequently used in large commercial systems, and sulfur dioxide was used in early mechanical refrigerators.
Carbon dioxide (R-744) is used as a working fluid in climate control systems for cars, residential air conditioning, commercial refrigeration, and vending machines.
Heat pipes are a special application of refrigerants.
Liquid gases are used as coolants for
cryogenic applications, namely applications using superconductors, or extremely sensitive sensors and very low-noise amplifiers. The most common and least expensive coolant in use is liquid nitrogen.
Liquid air is used to lower degree, due to its oxygen content which makes it prone to exploding in contact with combustible materials. Lower temperatures can be reached using liquefied neon. The lowest temperatures, used for the most powerful
superconducting magnets, are reached using
liquid helium.
Fuels are frequently used as coolants for engines. A cold fuel flows over some parts of the engine, absorbing its waste heat and being preheated before combustion.
Kerosene and other jet fuels frequently serve in this role in aviation engines, liquid hydrogen is used to cool nozzles and chambers of
rocket engines.
See also
External links
- CO2 as a natural coolant — FAQs
Checking Coolant Level
Checking Coolant Level ... Coolant Levels. For the practical test, the Tell Me/Show me question :-Please open the bonnet, identify where you would check the engine coolant level ...
Coolant - Wikipedia, the free encyclopedia
A coolant is a fluid which flows through a device in order to prevent its overheating, transferring the heat produced by the device to other devices that utilize or dissipate it.
Cardev International Ltd - Coolant handling and oil filtration ...
Cardev International Ltd offer a wide range of industrial fluid management machinery for most recycling, filtration and contamination prevention needs
Coolant Handling Specialists - Cardev International
Coolant Handling and Oil Filtration Specialists. Offering a wide range of systems for all coolant handling and oil filtration requirements. Cardev have been at the forefront of ...
Coolant Bleed procedure
Ensuring that the cooling system is clear of all air is essential: air bubbles act as highly efficient 'plugs' to impede water flow. If this happens, the engine can over heat ...
Feser One Non Conductive Coolant
Aqua-Pcs UK WaterCooling shop. Affordable water-cooling blocks, reservoirs, accessories, radiators, pumps, coolant, additives, cpu blocks, chipset blocks, gpu blocks, tubing, tools ...
Coolant Systems
Axminster Power Tool Centre - UK based Suppliers of quality industrial tools, machinery and workshop consumables. Easy to use, secure online ordering with FREE delivery on most ...
Filtermist Coolant Control - Loc-Line, Filtertramp Tramp Oil Skimmers ...
Filtermist manufactures of coolant control products for industrial applications that allow you to keep within health and safety regulations, and more importantly, maintain a clean ...
Coolant control, coolant modular hoses from Tektrak
Coolant control, coolant modular hoses, coolant transfer, coolant dispensing, coolant waste purification, sump deodorising from Tektrak
Coolant Technology
Chinese Site : Coolant Technology. The OASIS SAF® nonwoven coolant technology is a specially blended combination of super absorbent fibres in a composite fabric structure.
