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It can be any noble gas (though it's never helium).
Normally Neon but occasionally argon, krypton and xenon.
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How does a heat exchanger work in a gas furnace?
shell is the place where hot utilities comes across meets with the tubes which is cold utilities, in order to transfer heat. the area of the heat being transfer depends on how many/much the area of tubes being exposed to the shell hot utilities. the greater the area of tubes being exposed, more heat being transfer. hence, less energy needed in order to heat a big amount of cold utilities. decreasing of the temperature from hot utilities which pass over the tubes, next will be recycled back with others hot utilities/sources of heat.
Can you use fluorescent bulbs outdoor?
Can??? Sure, you'd just need to come up with a waterproof enclosure.But the problem is, many fluorescent fixtures don't work well when the temperature drops. Yes you can use fluorescent fixtures outside, they should be approved for the purpose and make sure they have 0 degree rated ballast for cold weather starting. The new electronic type ballast work in cold weather with no problems.
What is difference between ERW and CRW Pipes?
ERW: Electric Resistance Welding tube - tubes are rolled and joined With welding - fin cut is there CRW: Cold Drawn tube - without fin cut - Draw process
What is the difference between double pipe heat exchanger and shell and tube heat exchanger?
double pipe heat exchanger is made if two concentric tubes one carrying cold flow and the other one carrying hot flow. but shell and tube hear exchangers are made of a shell like a vessel filled with many thin tubes to transfer heat between fluids. there are more data available at : http://scopewe.com/double-pipe-heat-exchanger-design-part-1/
What are cold conductors?
A cold conductor is the insilation for a cold object to keep the coolness inside and the warmess out.
Do all vacuum tubes light up?
No, there are some cold cathode vacuum tubes. These do not light.
What type of electrode is a cold cathode?
Cold cathode is a cathode, an electrode that emits electrons, which is not electrically heated by an element. Cold cathodes are used in gas discharge lamps such as neon lamps and discharge tubes.
Could there be a strobe effect with fluorescent lighting?
Yes, it usually happens when the tubes are cold. As the fixture and tubes warm up this effect disappears.
Why are the test tubes wet when there are oxygen and carbon dioxide inside the test tubes?
Cold tubes cause condensation moisture, and if you put the gases in the tubes from a compressed source, expanding gases cause cooling (due to entropic effects).
What diode people use before the invention of zener diode?
gas filled cold cathode glow discharge tubes.
Why do your fluorescent tubes not work when turned vertical?
Evidently tubes have the ion emitter at one end only (the cold spot) and if its at the top convection currents overheat it. Should work if the label is at the bottom where the cold spot is.
What is the difference between cCFL and CFL?
A CFL, or compact fluorescent lamp, is a type of fluorescent lamp intended to replace traditional incandescent lamps. Advantages of CFL's include lower power use, a longer rated life, and significantly lower greenhouse gas emission. However, these lights tend to have higher purchase prices than those of incandescent alternatives. A CCFL, or cold cathode fluorescent lamp, is any type of fluorescent lamp in which the cathode is not independently heated. Neon lights are common examples of CCFL's.
What are LCD led tv's?
Conventional LCD televisions have used cold cathode tubes to illuminate the screen. They are a form of fluorescent lamp. LED televisions are also LCD but use LED as the light source rather than cold cathode tubes. The display technology remains identical with only the backlighting being different. LED backlit televisions use less power for the illumination than cold cathode and tend to run cooler as a result. Note that in 2012 OLED televisions are due to make an appearance. Unlike LCD LED, these use tiny LEDs that are turned on and off to create the image directly. They avoid the use of liquid crystal shutters and are set to deliver extremely thin and lightweight televisions. These are a very different technology to LCD but are thought to be the future standard for televisions.
What are led TV?
Conventional LCD televisions have used cold cathode tubes to illuminate the screen. They are a form of fluorescent lamp. LED televisions are also LCD but use LED as the light source rather than cold cathode tubes. The display technology remains identical with only the backlighting being different. LED backlit televisions use less power for the illumination than cold cathode and tend to run cooler as a result. Note that in 2012 OLED televisions are due to make an appearance. Unlike LCD LED, these use tiny LEDs that are turned on and off to create the image directly. They avoid the use of liquid crystal shutters and are set to deliver extremely thin and lightweight televisions. These are a very different technology to LCD but are thought to be the future standard for televisions.
Do all 3D TVs have LED backlighting?
Not at all. Many still use cold cathode tubes. LED backlighting and sidelighting are becoming more common, largely due to their low production costs.
What make fluorescent bulbs flicker?
A fluorescent tube will flicker is the temperature is cold or the fixture has a bad ground to the electrical system.
Is there such a thing as light without heat?
The fluorescent lighting is considered cold, but it is not totally correct.
