How do you calculate superheat temp?
take your gages and put them on the beginning of the evaporator (afte metering device or txv) and look at saturation temp then get your temp at the suction line (before the compressor)
5 people found this useful
A calculator is a device that computes the solutions to mathematical problems. For instance, 41+39=80, 99-63=36, 63*5=315, 315/5=63.
We require to superheat the refrigerant to ensure that no liquid enters in the compressor.So in most of the cases degree of superheat is kept 2 to 3 deg c
A calculator answers math problems to make life easier. Acalculator can be used to help solve equations to math problems. Acalculator helps cut down the time it takes to solve a problem byhelping with addition, multiplication, division, subtraction etc.Some special calculators can solve fractions, g…raph, and much more. (MORE)
When you are gauged up on the unit, as close to where your temperature reading will be taken as possible, (note: ofter times the there will be access specifically for this purpose very near the txv) use a good thermometer and obtain the temperature of the suction line 6 inches out from the evaporato…r coil. (right where the sensing bulb is in refrigeration or the equalizer tube for the txv in A/C is best.) Then, convert the pressure reading on your suction gauge to degrees for the type of refrigerant in the system and subtract it from the reading on your thermometer. This is the amount of heat that is being added to the refigerant AFTER it has changed state from a liquid to vapor. Remember to use a temperature pressure chart to get your temps for what kind of refigerant that's in the system. A/C systems should be between 15 and 20 degrees F Refrigeration is more like 6 - 12 degrees . (MORE)
First of all, the term "superheated" generally refers to a vapor. This explanation refers to superheated vapor only. Superheat is the difference (in degrees of temperature) between a liquid's boiling point and the superheated vapor's actual temperature. For example; at sea level, the boiling point o…f water is 212ÂºF. As long as the temperature is 212ÂºF, you will have both liquid and vapor present. If you continue to add heat to the liquid/vapor mix, all the liquid will eventually become vapor. Additional heat added after no liquid remains will begin to increase the temperature above 212ÂºF. This resulting vapor is superheated. If you measure the temperature of water vapor to be 220ÂºF at 1 ATM, the vapor is superheated by 8ÂºF. The same analysis is true for any liquid/vapor, at any pressure and for any other temperature scale. i.e. R22 refrigerant is "saturated" (meaning both liquid and vapor are present) at 32ÂºF and 58PSIG. If you measure the pressure of R22 at 58PSIG but measure the temperature at 45ÂºF, you have measured 13 degrees of superheat. I hope this answer is useful to you. Bama Cracker Degree of superheat is the difference between the superheated temperature and the saturated temperature of the steam . (MORE)
Calculate the heat given to a 500g steel containing 450g of water to raise the temp from 25degrees Celsius to 100The specific heat capacity of steel.510 Steel and water have the same temp changes?
The water and pot(/) have a temperature increase of 100-25 degrees C that is 75 degrees.. the formula Q=mass * SH* change in temperature can be used for both the water and the steel pot. Hence for steel pot Q=510 j/kg/degC*.5kg*75Deg C=19125 joule.. For water SH=4187 j/kg/C. QW= .45*4187*75=1413…11 joule. total heat (neglecting changes and losses to get the water to 100 deg C is 160436 joule or 160.4 kjoule. Note this does not boil the water it only raises the temperature to 100 degrees C. to boil the water requires approximately a futher 1250 kJ (MORE)
17 to 20 degrees is normal.you should always check dry bulb at return air and outside temp to determine the correct reading
Super heated generally refers to vapor. Super heated gas usuallycontains about 10 degrees of super heat in the gas. . +++ . I'm afraid you've muddled heat and temperature, for a start. Afluid cannot "contain" a number of degrees, but may be at thatnumber of them. This is because degrees measure te…mperature, theintensity of heat, which is a form of energy hence measured inJoules. . A superheated vapour is one whose temperature has been raisedabove the evaporation temperature at the pressure at which theliquid evaporated. The "usually" phrase is meaningless:superheating can raise the vapour's temperature by far more than amere 10Âº - whether Celsius or Fahrenheit degrees! (MORE)
You need to wait until the waiting period is over and retake yourtest. If you are past needing a temporary license, you may be ableto test for your permanent license.
Maintain Incubator at between 99.5 and 101 degrees F. I keep mine at 100 degrees F with a humidity of about 55 to 60 %. increase to 65% three days prior to expected hatch time.
The temperature in Russia is 7 degrees Celsius. Depending on theregion, winters can drop below -65 degrees Celsius.
You can calculate the sum of numbers by adding numbers together.You can calculate the product of numbers by multiplying thosenumbers.
a calculator is a machine in which u give some input and getting some output. Basically it is a mathematical device which perform manipulation on no. that u give to this machine as the input. we can done any arithmetic or some calculator have facility to perform some logical operation by this. By us…ing of concept of theory of computation we can make better a calculator. (MORE)
a temp usually pertains to a temporary worker for someone. This person is given a specific time in which he/she will work. at the end of the time they will be terminated, or let go.
If you mean on a computer, go to the Start Menu, then to the Programs menu and then to the Accessories menu. To change the calculator from an ordinary one to a scientific one, use its View menu, You can also use other applications, such as a spreadsheet, to do most of the calculations you might need… to do. (MORE)
Superheat depends on the type of metering device you are using in the equipment as well as the current state of the load. With a fixed orifice, the superheat will be high, about 20 to 30 degrees when the box is warm, down around 10-15 when the box is cold. With a txv, the superheat should be constan…t, normally between 10-15 degrees. It is best to check the superheat at the outlet of the evaporator. this will ensure that the compressor does not slug with liquid refrigerant. (MORE)
How do you calculate the quantity of N2 gas required to fill a cylindarical tank 60D X 90L to a pressure of 3000 PSI at room temp?
This sounds like a school problem. Do you want the answer in kg or moles?. Pv=mRT for kg or Pv=nRT for moles. m=Pv/RT or n=Pv/RT. P=3000 psi. v= (1/4)*D*Pi*L. R for Nitrogen = 0.2968 kJ/kg-K for kg.. For moles, use the universal gas constant, 8.31451 J/mole-K, and the molecular weight of Nitro…gen is 28.01 g/mole. Room Temp is 295 K. Make sure to keep your units consistent (MORE)
Let's put it this way: if you dont feel like doing your math problems, it can do it for you :).
There were small mechanical ones put out in the 1950s like miniature cash registers. But the first pocket elecronic ones were made by Sanyo, Canon, and Sharp in Japan in 1970
For example : if you want to product high steam pressure with temperature 310 C. but the real temperature is 320 C, so must be decreas less than 310 C by a device which name superheater. there are many ways to decreas the Temp. For example make the steam through water which it Temp. 120 C to make he…at exchange with steam before the water go inside boilers. I hope that a correct answer and simple. zaid alruwaili (MORE)
the calculator has squishy buttons in the in side of it aznd a computer divise that makes it radomly come up with the answers soo fast............. this post was made by.. E.B. key to that i am not very smart... lol got ya hahahahah
Here, let me show you an example of how you do 2 + 2 : *** Press 2, then the plus (+) sign, then 2 again. After that you press the equal (=) sign. Then, the calculator should say 4 on it's screen.
There is no nice and easy formula to calculate what is being asked. Turbines and generators will have different efficiency curves. Nothing was mentioned about the pressure of the steam in the question. As the temperature and pressure of the steam rise, a pound of steam will contain more energy th…at can be used by the turbine. In general, though, 20,000 to 25,000 pounds of steam an hour flowing through a plant will give one megawatt of production. It is important to note this is for a power plant. The residential geothermal energy that is being used in houses is not a suitable energy source for power production. (MORE)
Eggs should be maintained at between 99.5 and 100.5 degrees Fahrenheit with a minimum of 50% humidity. The temperature can go as high as 101 but this will effect the hatch rate. Prolonged periods of cooler temps below 99.5 will cause delay in hatching.
To make the super saturated steam. The steam is commonly used torotate the turbines in the power generation plants. To save theturbine blades from corrosion the steam provided is made free fromH2O by making it super saturated using super-heater in theboiler. . +++ Steam free from H2O. Now there's a… thing... Steam IS H2O: it'swater in its gaseous phase! . It is true that water droplets are not wanted in a turbine, butthat is not the primary function of superheating, either inturbines or reciprocating engines. The steam at boiler pressure isat the evaporation temperature of the water at that pressure.Consequently, as pressure falls the steam starts to condense,wasting energy. Superheating raises the steam's temperature higherstill, allowing it to remain as a gas for longer in its passagethrough the engine, hence maximising the thermal efficiency of thesystem. It was applied first to railway locomotives in the 19C, andfound very quickly to save a lot of coal and water for given enginepower outputs. (MORE)
The function of the super heater is to increase the temperature of the steam above saturation by utilising the heat from the flue gases.
no 321 can't be sued in place of 347H in place of superheater tubes in ammonia plant as in 321 when we weld craters devrlop which is not there in case of 347 H Niobium has more affinity than Titanium for carbon and high temperature stability of Niobium Carbide is more superior than Titanium Carbide…s (MORE)
If you have a computer, you already have the calculator that is part of the computer's program.
Suction superheat is the heat added to the refrigerant above that required to change its state from liquid to vapour (as happens in the evaporator). This heat is added both in the evaporator, in the suction line and (where applicable) in the suction accumulator. Discharge superheat is suction super…heat plus heat of compression, and must be removed in the condenser before condensation, the change of state from vapour to liquid, can occur. The HVAC Veteran (MORE)
take your gages and put them on the beginning of the evaporator (afte metering device or txv) and look at saturation temp then get your temp at the suction line (before the compressor) then take you first temp and your second temp and subtract you highest temp from you lowest temp and that would be …your superheat (MORE)
Their are many ways to calculate the things in right way. Try to use calculator or some kind of small paper in your hand if you need to calculate things in hurry.
I assume that you are referring to the "normal" boiling point, i.e. the temperature at which a substance boils at either 1 ATM or 1 bar. H vap (enthalpy of vaporization) can be found at different condition than the another temperature by the following method: 1) Use the heat capacity of the liqui…d to find the energy involved in taking the liquid from the temperature of interest to the boiling point temperature. If you have a formula then you have to integrate from the starting temperature to the boiling point temperature. If you have a constant (which is just a rough approximation of the average heat capacity over a range of temperatures) then just use H = C p(liquid) (T boiling -T initial ). 2) Add the heat of vaporization at the boiling point (H vap ) 3) Finally, add the enthalpy change for taking the vapor from the boiling point to the condition of interest. For an ideal gas, this would just be H = C p(gas) (T boiling -T final ). For real gases it is a little more complicated as you have to integrate PV over the change in pressure from 1 ATM (or 1 bar) to the final pressure. For an ideal gas, PV is constant so the integral is zero, but for real gasses with substantial pressure changes, the integral can be non-zero. (MORE)
Christian motivational speaker, Tempe Brown, is also a gifted musician, songwriter, portrait artist and author of a book entitled, The Seed
Why is that you use 347H tubes in superheater in ammonia plant whereas in power plants the superheater tubes are of P22?
People who know about things like that at all, would know the answer, or at least ask a pro not WikiAnswers.
Undercharge can cause HIGH superheat. Overcharge can cause LOW superheat. You need some superheat when charged correctly. How much is needed is depending on outdoor air temperature and indoor wet-bulb temperature.
If the superheater safety valve lifts first the excess pressurewill be relieved and no damage will be done due to overheating.This is a good thing and the way it should work. If the boilersafety valve were to open first there would not be enough of asteam flow through the superheater to "cool" the t…ubes of thesuperheater which could result in severe damage. +++ ??? That doesnot read right at all. For a start, steam only flows through thesuperheater when the engine cylinder or turbine is operating.Locomotive boilers' superheaters don't have safety-valves on them,and the regulator is upstream of the superheater, but they don'toverheat when the regulator is closed. The boiler safety-valvewould not lessen the flow of steam through the superheater anyway -its role is to vent excess steam hence prevent over-pressure in theboiler. A safety-valve on a superheater would similarly onlyprotect the pipes from over-pressure, not from overheating.In factit's difficult to think of a situation in which a superheater canbe overheated to the point of damage. . OK Let us look at your rebuttal to my answer and I will explainwhy you are wrong. First you say that steam only flows through thesuperheater when the engine cylinder or turbine is operating. Thisis true but it is the first indication that you don't reallyunderstand thermodynamics. The steam is not flowing but thetemperature continues to rise. Just because the safety valve liftsyou don't automatically shut off the fire and this heat continuesto act on the superheater raising the temperature to a level whereit could damage the metal of the superheater tubes. In other words,the superheater tubes get hot from the fire and the steam getssuperheated by carrying this heat away. If this heat is not removedthe tube overheats and becomes damaged. . But hey don't take my word for it lets see what the experts haveto say. In the 40 th edition of Steam, Its Generation andUse by Babcock & Wilcox Chapter 23 Page 6 under Safety andrelief Valves paragraph 6 and I quote "For drum boilers withsuperheaters, Babcock & Wilcox (B&W) prefers to follow theCode allowed procedure of setting the safety valves so that thesuperheater valve(s) lift first at all loads, thereby maintaining aflow of steam through the superheater(s) to provide a measure ofover-heat protection." (MORE)
ok this is the answer only if u tell me what evidence is there that the ziggurat existed
Liwuid refrigerant would make ist's way back to the compressor and may cause damage to the valves and alos will dilute the oil which causes bearing failure.
It is used to convert saturated or wet steam into dry steam foruse in steam turbines, which are used for marine propulsion and thegeneration of electricity. . +++ . Also used for steam feeding reciprocating engines such asrailway locomotives. It is not just a matter of dryness.Superheating allows …the steam to work as a gas for longer duringits passage through the turbine or cylinder, hence increasing thethermal efficiency of the whole plant. (MORE)
To smelt with superheat you need both the magic level for this spell, and the smithing level for the metal you want to smelt.
Most people say that it has to be atleast 32 degrees for it to start snowing. But i say it has to be atleast under 36 degrees. Hope this helps.
It's over charged, check the gauge if the air temp is about 80 degrees engine at idle 63 to 64 psi. 90 degrees out 70 psi with the A/C on max cool fan at high raise the rpms to about 1500 and the compressor should stay running and not go below 40 to 45 psi if the compressor starts to cycle on and of…f the low pressure switch is bad. (MORE)
to avoid rapid soldification of this metal, it is melted to at least 50 degrees above the melting point.
They don't. BWR's run wet saturated steam. There is no superheating in a BWR, because there is no way steam would come in contact with a heat source. The plant must be built to be compatible with wet steam that could condense.
it is a low pressure heater used in the boiler system in the thermal power plants to convert the saturated steam into super heated steam.
This can only be answered accurately using steam tables. However,in general practice, for every 0.47 btu of heat added to 1 lb. ofdry steam at atmospheric pressure, the temperature will rise 1degree fahrenheit.
To stabilize the steam temperature over varying load conditions. At high firing rates radiant superheaters can heat the steam to temperatures higher than desired, at low firing rates convection superheaters will do the same, desuperheaters balance these and stabilize the steam temperature.
You can only guess by looking at the gauge. If it is sitting half way up the scale it is normal and is running at around 200 - 220 degrees. It does not boil because the system is pressurized.
The right temperature to superheat and sub cool a substance varies greatly. Water for example takes temperatures above 212 degrees to superheat and temperatures below 32 degrees to sub cool.
How to calculate final pressure when given initial pressure and initial temp and also final temp and know that it's a constant volume process from initial state?
You can calculate pressure and temperature for a constant volume process using the combined gas law.