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Critical point is the state of water at which no latent heat is required to convert water into superheated steam.
Above this point water directly converted into superheated steam.
theoretically critical point of water is 221.4 bar and 374.2 deg C .
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∙ 13y ago
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∙ 15y agoTemperature (approximately) 374oC 705oF 647 K Pressure (approximately) 217.7 atm 3200 psi 6514 in-Hg
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∙ 12y agoAdd your answer:
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What is the meaning of super heat?
Superheated steam is steam at a temperature higher than water's boiling point
What is meant by degree of superheat?
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 of water is 212ºF. As long as the temperature is 212ºF, 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 212ºF. This resulting vapor is superheated. If you measure the temperature of water vapor to be 220ºF at 1 ATM, the vapor is superheated by 8ºF. 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 32ºF and 58PSIG. If you measure the pressure of R22 at 58PSIG but measure the temperature at 45ºF, 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 .
How do you determine the specific volume of water at specific temperature and pressure for example at 177 C and 17.2 Mpa?
That is experimental data and it is tabulated in Perry's Chemical Engineering Handbook and other places, check under "superheated water vapor." You might have to interpolate.
Why do researchers us DNA polymerase from bacterium found in superheated water for PCR?
because they are more durable in high temperatures. Increasing the temperature is a way to increase the enzyme's production rate. Normally, a protein will denature at high temperatures. This way you can have the best of both worlds.
When a solid becomes a liquid does its temperature rise?
It depends on the material. Each material has its own point at which it turns from solid to liquid (or vice versa), and this temperature can change under certain conditions. To use a common example, water typically turns solid (freezes) at 0 degrees C. However, under the right conditions, it can be supercooled down to -42 C before freezing. Similarly, if kept under pressure, water can be superheated, and it will stay liquid instead of turning into a gas (water vapor).
In order for a high temperature boiler or steam engine to produce superheated steam?
In order for a high temperature boiler or steam engine to produce superheated water, or steam?
What is the meaning of super heat?
Superheated steam is steam at a temperature higher than water's boiling point
What is the difference between dry steam and wet steam to clean?
DRY steam is superheated There is a temperature below which steam will start to condense into water droplets. This is called the saturation temperature, and it varies with the pressure of the steam. Steam that is exactly at its saturation temperature is called saturated steam. Steam that is below its saturation temperature contains droplets of moisture and is called wet steam. Steam that is above its saturation temperature is called superheated steam.
Why only DM water is used in Nuclear Power Plants boilers. Give reason not to use distilled water?
Distilled water contains no impurities so it can become superheated. Superheated water is water heated above boiling point when it is not boiling. When the water is superheated, it will be very dry to turn the turbines so the turbines are not wet
What happens to a refrigerant when it is above the saturation temperature?
it remains in a vapor state
Why is superheated steam used in power plant?
because if the steam is not superheated the remaining water droplets reduce efficiency and can cause corrosion and pitting. +++ Nearly! Saturated steam, as non-superheated steam is called, is really only steam at the pressure and temperature in the boiler. Once it starts to expand as a gas in doing its work, the pressure and temperature fall and condensation will set in, leaving less and less useful water-vapour to act as a gas. Hence, as you say, the efficiency falls.
What happens to the blood bag material ie PVC during superheated water spray sterilization.Blood bags are usually sterilized by superheated water spray sterilization.?
What is steam sterilization( at 121 degree) process.
How much energy is used per kilogram of steam?
That would depend on if the steam is superheated dry steam or not and if superheated dry steam its temperature. It should be possible to google "boiler equations" or "boiler design" to get details.
What underwater structure spews out superheated water that contains dissolved minerals?
A hot-water or Undersea vent.
What is the temperature before you call it steam?
Steam has a minimum temperature of 212 degrees Fahrenheit or 100 degrees Celsius, because those are the temperature at which water boils under normal pressure. Once steam goes below those temperatures it turns back into water. Steam can be heated above those temperatures under certain conditions and is then called superheated steam.
What is meant by degree of superheat?
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 of water is 212ºF. As long as the temperature is 212ºF, 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 212ºF. This resulting vapor is superheated. If you measure the temperature of water vapor to be 220ºF at 1 ATM, the vapor is superheated by 8ºF. 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 32ºF and 58PSIG. If you measure the pressure of R22 at 58PSIG but measure the temperature at 45ºF, 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 .
How do you determine the specific volume of water at specific temperature and pressure for example at 177 C and 17.2 Mpa?
That is experimental data and it is tabulated in Perry's Chemical Engineering Handbook and other places, check under "superheated water vapor." You might have to interpolate.
