state the  principle and function of centrifugal fans or forced draft fans in steam boilers?
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While the flame is on, they make sure that the combustion has enough air to mix with the fuel for an efficient flame. \n\nAnd when there is no flame they do a purge of the burner area to make sure there are no combustible fumes that could cause a fire if not cleared out. Code requires that the combustion chamber be prepurged for a specific duration before even the pilot can be lit.
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leftknight is about right, but it uses hydraulic fluid, not water. These presses range from small hand-pumped laboratory units to huge monsters with thousands of tons force. They are used in metal forming and making bricks and structural concrete pieces.
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Steam generators produce steam not condensation.  A steam generator (e.g., in a nuclear plant) generates steam that can be used to drive a steam turbine to generate mechanical or electric power.  The oldest systems (non-nuclear) discharged the steam wastefully to atmosphere.  In modern plants, exhaust steam from a steam turbine is directed to a steam condenser (where cooling water is used to condense the steam).  This allows the condensed water that must be highly pure and chemically treated to be reused by pumping it back to the steam generator.  More importantly, because the steam condenser reduces the turbine exhaust pressure well below atmospheric pressure, the steam is permitted to expand even more through the turbine blades extracting more power from the steam.  This greatly improves overall system efficiency by providing far more power from the energy expended to produce the steam.
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1)Teflon coated at the base.\n2)Steam option for Pressing.\n3)lower energy consumption through power electronics control.\n4)armoured cable \n5) forced cooling after work is over
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Its so easy to do a search\n\nhttp://www.taftan.com/thermodynamics/STURBINE.HTM\n\nhttp://en.wikipedia.org/wiki/Steam_turbine
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They send it to cooling towers to turn the steam back into water, so they can take advantage, once again, of the mechanical energy involved in water expanding into steam.  Water expands a lot turning into steam, but when steam just turns into even hotter steam, the pressure increases, but not that much.\n\nSure they could be even more efficient by finding a good use for the extra heat, but that would be a bunch more machinery.
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Fire, a pressure vessel, a press and a filteration system.
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Any heating system works on a simple system:\n\n1. A heat source ('boiler') heats a circulating fluid;\n2. The fluid is pumped around the system heating other 'areas'\n3. The slightly cooler fluid is circulated back to the 'boiler' where it is reheated - by doing this we do not have to introduce additional fluid and it is more efficient to reheat already 'heated' fluid.\n\nHope this helps but if you need more drop me a note.
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It is difficult to say without further details, but you could use a centrifugal pump or even a progressive cavity pump.  This is because of the high-head, low-flow you are likely to encounter.  \n\nThe PCP would provide a substantial amount of pressure without the pulsations you would get with a positive displacement pump.  You would have to provide over-pressure protection.\n\nGoogle "filter press" centrifugal "progressive cavity pump"
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Do you want cooling effect or warm?\nPl. read:\n\nStandard ceiling fan controls usually include one for speed (high, medium, low, and off), one for the light (on and off), and one for directional control of the fan blades (clockwise and counterclockwise). These vary depending on the make, model, and age of the fan; computerized and remote-controlled ceiling fans are becoming very popular as the technology becomes regularly available.\n\nCeiling fans are normally used as a cooling device in warm months by pushing air down from above, thereby creating a wind chill effect. In winter months, a ceiling fan can act as a heat transferrer by reversing the direction of the blades. By doing so, the fan pulls air up, thereby pushing the warmer air that stratifies near the ceiling down along the walls; as long as the fan is set at a low speed, this will not create a wind chill. A fan on reverse has the leading edge of the fan blades being the downward edge; in most cases this rotation is clockwise when the operator is standing below and looking upwards at the fan.\n\nActually it is not that simple. If you have a standard ceiling height (~8 feet) then you want to run the fan in the clockwise direction during the winter. Specifically, the ceiling fan blades should be running with the lower edge of the blade being the leading edge into the air. Having the leading edge of the fan blade down will pull the air in the room upward which pushes the warm air hovering near ceiling outward and forces it to mix with the rest of the air without creating much turbulence or breeze. Although it is a common sense explanation to run the fan in the opposite (counter clockwise) direction pushing the warm air down as a direct force, this also creates a breeze in the room (giving an undesired ‘cooling’ effect) and is therefore not effective for standard ceiling heights.\n\nFor high ceilings (greater than 8 feet) you want to run the fan in the counterclockwise direction during the winter. Specifically, the ceiling fan blades should be running with the upper edge of the blade being the leading edge into the air. Having the leading edge of the fan blade up will push the air near the ceiling downward into the room. The breeze created by operating the fan in this direction will be undetectable at low speeds since the fan height is tall enough that the breeze has dissipated before reaching the room height where people would notice.
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I'm afraid answer 1 is vague, and answer 2 is plain wrong.\n\nA steam trap releases condensate (liquid) and most also purge air. The type of steam trap (inverted bucket, float and thermostatic, impulse, thermodynamic, thermostatic, etc.) will determine the effectiveness of air venting. Steam traps basically close to prevent steam from passing, and open to allow condensed steam (condensate) to pass.\n\nAn air trap is most often used on an air compressor system. This type of trap is usually a simple float-type trap that purges condensed air (condensdate) and closes to prevent loss of air.\n\nThere is one type of trap that will perform both functions with one simple modification. An F&T trap, or float and thermostatic trap, will purge steam condensate and air. The same trap less the thermostatic element (now called a float trap) will purge condensate only.
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I assume you are talking about a central chiller plant setup. This is common on large campuses. There are a few high capacity centrifical or recepricating compressor water chillers that chill water and it is stored in large tanks to expand system capacity or ofset high peak deman energy costs. The chilled water is sent to buildings and used to cool them in a device not unlike a car radatior.
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Steam turbines have several controlled nozzles which connect to the superheated steam source from the boiler and superheater.  The number of nozzles and steam flow rate through the nozzles can control the power output of the turbine.  The momentum of the steam gas hitting the turbine (in stages) as it expands spins the turbine creating shaft power.\n\nOne type of gas turbine is the exhaust side of a turbocharger.  Hot exhaust gas under pressure is pumped by the engine into the the outer ring of the turbine.  The gas is still expanding, and spins the turbine providing shaft power to drive the air compressor side.  \n\nThe type of gas turbine common to power plants and airplanes has a compressor section, combustion chamber, and expansion section.  The expansion and compression turbine sections have moving vanes and stationary vanes to direct the gases and extract the most work possible from the setup.  Atmospheric air is compressed by the compressor and fed at elevated pressure to the combustion chamber where fuel is injected and an ingnition source keeps the flame lit.  The exhaust spins the expansion section and exits through the rear of the engine.
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The fan works to cool your comp. down when it gets a but hot.\nIt will turn off and on to maintain the temp at a reasonable level. \nJust like a thematic fan on a car does to keep the radiator cool.\nWhne you use more power from the comp it gets warmer quicker, There is nothing to worry about.
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Uhh, we need more information to answer that question. pressure needed really depends on the turbine design not the boiler design. Also, energy transfer is a function of pressure and flow of the steam. The pressure alone is not a measure of the energy transfer from the boiler to the turbine.\n\nAdditionally:\nWhat is the efficiency rating of the boiler? of the turbine?\nWhat distances are involved?\nIs the boiler exclusively for the turbine? Or are there other services involved?
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Besides the typical methods such as refrigeration which uses expanding freon or amonia gas to transfer heat or standard evaporation, two other electro-mechanical methods come to mind.\n\nOne method is a thermoelectric cooler which can heat or cool based on the direction of DC electric current flow. It is built from a junction of two metals which are different and when DC current passes through the junction, heating or cooling can occur depending on the direction of the flow of the DC current. This is known as the Peltier effect.\n\nThe second totally mechanical method is known as a Vortex seperator. Air is introduced at high speed into a tube with a curving vane inside. As the air spins up through the tube, the colder air, which is heavier is forced outside due to centrifical force while the air moving up the center is warmer and lighter than the cold air. The difference in the weights of the cold and warm air cause them to seperate from each other with the cold air unable to make the tight turns and is forced to the outside of the tube as it spins to the top. These units typically have a cold air output connection on the outside of the tube at the end and a warm air connection in the center of the tube at the end.
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Thermic Oil Boiler has lot of advantages over Steam Boilers. Thermic Fluid Boilers require less maintenance and have longer life. The Thermic Fluid Systems are closed loop systems and are virtually non pressurized. whereas the steam boilers are pressurized system. Also no water treatment plants are required for Thermic Fluid system. temperature upto 300 Deg. C can be achieved in normal Thermic Fluid Heaters as compared to185 Deg. C in Steam Boilers. In case of Steam Boiler, higher capacities of system comes under govt. regulations and qualified boiler operator is required along with govt. fees and yearly inspections. The operational cost of steam boilers is much higher than thermic fluid systems. The Thermic fluid systems are virtually maintenance free as compared to Steam Boilers in terms of corrosion, rusting, choking, scale problems, failure of pressure parts etc.. Regarding stenters, dyeing machines, tumblers etc. Thermic Fluid systems are Best as no direct heating is required in textile machinery. In Case u need more information, contact me or mail me. It will be my pleasure to help u.