Why dont some nuclear reactors have cooling towers.  how it the h20 or h30 cooled without one?
339414
some reactors don't need them b/c they're not cooled by water.  they have liquid metal reactors and also gas cooled reactors.  however.  however, in a boiling water reactor the water that turns the turbines never comes in contact w/the outside, it simply stays in the reactors in a continuous loop.  that heated water is used to boil other water which causes the turbines to turn.  pretty much all of the reactors used in the United States are PWR so they all will have cooling towers.
382044
I worked in the natural gas industry for 35 years and I have never heard of a natural gas storage tower. Do you mean a liquefied petroleum gas storage tank? Or maybe a liquefied natural gas storage tank? Please provide more info.
116800
Hydrogen bomb is an atomic bomb, it use fusion instead of fission. \nFusion as you may know is when 4 hydrogen atoms get together and make a Helium atom, this process release a Notrino and lots of energy but it can't be performed in normal circumstances like Fission bombs where a Uranium atom breaks into two smaller atoms and release energy.\nIf what I remember from physic classes is true in order to make a fusion reaction a very hot enevironment needed, so Hydrogen bombs consist of a Fission Bomb which make this heat and a Fusion bomb.\nIt has a normal atomic bomb inside.\nIt reminds me of the title of Dr. Strangelove: How I learned to stop worrying and love the Bomb.
7743
It depends on the mass.  Take a look at the graph in the source link. Elements with an atomic mass lower than that of Iron (or there abouts) generally must have energy added to the system to split it.  Conversely, those same atoms lighter than iron will release enegy when you fuse them together.  This is the property of nuclear fission.  It is how the sun works to create heat and light by fusing hydrogen atoms into helium atoms, and it is also the principle behind the H-bomb (the hydrogen bomb, or the fusion bomb, which is much more powerful than the fission bombs dropped on Nagasaki and Hiroshima).\n\nIf the atom is heavier than iron, it will release energy when you split it.  Heavy elements like uranium and plutonium are unstable, and will naturally decay, releasing particles and energy.  If these high-energy particles hit other unstable elements--like more uranium--you can get a chain reaction, which makes decay happen more quickly.  Under controlled levels of uranium density, you can make this heat useful to boil water and run turbines and generate energy.  But if the density of the unstable element is really high, the chain reaction can take off uncontrolably, causing a nuclear explosion.  this is the principle behind fission bombs, like those dropped on Nagasaki and Hiroshima.\n\nHydrogen bombs require tritium, which is a rare isotope of hydrogen that has two neutrons.  the technology behind nuclear fusion is more complicated than that behind fission.  Power plants currently use fission, but fission has the problem of producing radioactive waste.  Hydrogen fusion has the problem of being hard to control, although people are working on developing a fusion reactor to generate energy, which would be advantageous.
480396
Ohhhh No. it will freeze. It just won't freeze as easily as others because water has very high heat capacity compare to many surround things, which means it takes longer to cool down or heat up. Let's say it's -20 degree C at night but at dawn to dusk it might not be. So water in the tower spend more times under tempreature above 0 degree and less time under tempreature under zero. (imagine) Let's put that tower in artic region where everything is frozen all the time. What do you think.
221103
There is water/gas cooling heat exchanger are started first to avoid overheating. There is some checking for Hydrogen which can mean a water leak into the core. The 3mile island problem is online. It explains what the operators did to worsen the problem and what could have been done in detail.\nTry Am Institute of Physics, Physics Today site.
121926
Water (like many refrigerants) can exist in three separate phases; ice, water and steam (solid, liquid and gas).  A refrigeration system that uses two phases would compress and cool the gaseous (vapor) phase into a liquid then let it evaporate (removing heat from a room?) back to the vapor phase.  This differentiates the process from other systems that for example use a thermopile (a series of thermocouples) to cool.  Also Ammonia refrigeration uses the solution of the vapor phase into a circulatiung liquid in a very different type cooling process.
339420
The atomic bomb uses nuclear fission ( the splitting of the nucleus of an atom)and the hydrogen bomb uses nuclear fusion (the bringing together of 2 nuclei, which is what happens in the Sun.). \nUranium ore occurs naturally in a state that cannot be used in most reactors or to make nuclear weapons. Enriching the uranium makes it easier to use in reactors. The enrichment process increases the amount of the fissionable uranium-235 isotope. Uranium enriched to contain less than 20 percent uranium-235 is called low enriched uranium. Uranium enriched to contain 20 percent or greater uranium-235 is highly-enriched uranium that can be directly used to make nuclear weapons. This is because it is more unstable, i think.
548164
Your question is a very good one and everyone here is trying to help. Let me wade in with what I hope is a clear answer or two.\n\nCommercial reactors do not have the configuration to do what a nuclear bomb does: go promptly critical and thus have a large-scale supercritical nuclear explosion. Even Chernobyl (may the 40 or so people who died from it rest in peace) was mostly a steam explosion with a burning of the graphite core. The RBMK reactors like Chernobyl have mostly been shut down now - folks in the former Soviet Union may chime in now as to their status. \n\nModern commercial nuclear reactors (unlike the RBMK design) have large concrete domes called containments over them. The containment structures are designed to hold large amounts of pressure to guard against an accidental release of radiation. Even if the reactor core (part with the nuclear fuel) should become uncovered and thus lose its cooling, the containment will hold most of the radioactive material inside. That is precisely what happened at Three Mile Island. Most of the fuel and fission products were in the containment basement and plated out on the walls.\n\nThe most credible accidents are practiced for often at every power plant. Drills exercise the staff from the control room to the folks who go out into the field to survey for radiation. Those drills are graded not just by the plant, not just by the NRC, but by the county and state. \n\nNuclear reactors do not become nuclear bombs. If you were to take used fuel from nuclear reactors and chemically reprocess it - separating out the plutonium that is made in small amounts in the fuel - you could eventually make a bomb. We do not do reprocessing of commercial nuclear fuel in the US. There is a worry that some countries may do that. Of course, that is precisely what the military does do.\n\nMy job? I am a Health Physicist. I teach radiation protection, nuclear physics, and radiation chemistry. In the event of an accident, I read remote monitors and figure out what the pathway the radionuclides are taking out, how much, and what dose might be delivered to the population downwind. My predictions are used to advise the county about evacuation of persons living in a 20 mile radius of the power plant. I have a Bachelors of Science in biology from Baylor University, Masters in Applied Nuclear Science from Georgia Tech, and my PhD work was in leukemia research at Baylor Col. of Medicine. I was part of the Three Mile Island Recovery Team.
89918
Convection and conduction are both important.  Radiation is negligible.  Heat is transported from the inside air to the refrigerant, and from the refrigerant to the outside air, through two heat exchangers.  In each exchanger, heat is transferred by a mixture of convection and conduction* between refrigerant and heat exchanger tubing, conduction through the walls of the tubing, and convection* (which may be forced by a fan) between the tubing and the air.  \n*Some may disagree with my interpretation of which kinds of heat transfer dominate each of these phases; it's a judgment call.  If most of the heat transfer is due to motion of the fluid (refrigerant or air) it's convection; if not it's conduction.
657506
Because of all the water that gathers on the tray that supports the a/c mechanism. As air is cooled, water condenses from the air and drips down to the bottom where it gathers. Microbes that like cool moist environments will grow there. These microbes can then be introduced into the air and blown into the room.
970427
The difference is big.  With a water cooled chiller, there is a unit located in the building that acts as the driving force to transfer the heat from the building water loop to a secondary loop (condenser water loop).  The second water loop is then run up to a cooling tower usually located on the roof of a building where the heat is then expelled to the atmosphere.  High efficency with these type of devices.\n\nWith an air cooled chiller, there is no secondary water loop, and the primary water loop from the building runs directly up to the roof.  There, the chiller uses the thermodynamic principles of refrigerants to directly remove the heat to the atmosphere.  There is less equipment with this system, but the efficiency is half that of the water cooled systems.\n\nAlso, air cooled chillers are limited in the total size of the cooling system that they can adaquatly handle, where as water cooled chillers can be much much larger.
397666
Mist cooling is simply introducing an atomized spray of water into an airstream to cool the air.   As the water droplets vaporize and dissolve in the air, they remove heat energy from the air, leaving the air slightly cooler.\n\nThese systems are most effective in dry heat climates, where the relative humidity is low.  The water can evaporate much more quickly, removing more heat.\n\nThe lowest temperature that can be conceivably reached (provided that the system were 100% efficient) is the dewpoint temperature, also known as the wet-bulb temperature.  If the air were cooled to this temperature, its relative humidity would be 100% and it would be at maximum moisture saturation.  So, in most cases, these coolers can only reduce temperatures to 60 or 70 degrees under normal conditions, unless you're in a desert or other arid region.\n\nMost mist coolers are smaller, portable systems that use a common fan with several nozzles in front of it that produce a very fine mist spray of water.\n\nSmaller systems are also available for cooling milling work in tooling manufacturing.  These systems typically have an additive in the water supply to reduce the oxidation effects of the water.
160185
try this website, I just did a search and this came up:\n\nhttp://nuclearweaponarchive.org/Nwfaq/Nfaq5.html
669528
Just like the cooling system in your car. Unless you overclocks your processor(s), you don't need this. Mind you some of these things are huge, so you need more space. And there's the somewhat cumbersome piping and stuffs.
1037873
Depends on what you mean by types.\n\nDo you mean the type of material used in constuction or the type of activity the building is intended for.\n\nMost large building use a chilled water system where they use chillers to cool water down to about 42 deg F then pump the water throught the building to air handler units which blow air across the coils filled with the water.  This heats the water, but cools the air.  As the air is circulated throughout the area the water is returned to the chiller to be recooled and the process starts all over again.\n\nHowever, an important point is capacity.  That will be determined by both what the intended use of the building is and what sort of material is used.
1148968
If you mean the giant towers that have come to symbolise Nuclear plants then those are cooling towers and actually disperse the extra heat from the superheated water into the atmosphere. These towers are also found in huge thermal power plants which burn coal or oil to make electricity.