Vacuum is achieved by removing air in a certain space
The efficiency of the Rankine cycle depends on extracting as much energy from the steam flow through the turbine as possible, and to do this you need to have as low a vacuum in the condenser as possible. The lower the temperature of the cooling water flow through the condenser, the lower the vacuum that can be achieved. Cooling towers are often the best solution, though plants on a large lake or the ocean can use direct cooling supplies from that source and this may give better efficiency. It all depends on the cooling water temperature that can be achieved.
There is no pressure in a vacuum, a vacuum is the absence of anything, there is nothing there to push. Air from a pressurized space that becomes open to a vacuum may push you into the vacuum, but the vacuum itself does nothing as it is literally nothing.
Laws of Thermodynamics and Equilibria. Each object wishes to reach equilibrium with atmosphere. One gives off heat, the other absorbs it (until both objects and the atmosphere in the vacuum are the same temperature). Process of heat transfer achieved through Radiation.
vacuum-phobia or vacuum-cleaner-phobia
Turn on the vacuum cleaner, this is a partial or imperfect vacuum.
A kenotometer is an instrument used in steam turbine condensers to measure the vacuum in the steam space of the condenser. The vacuum achieved by the condenser has significant influence on the efficiency of the steam turbine.
Roughly 16 inches before the surface starts to boil from the vacuum, this is also assuming 33 degree water, the higher the water temp the less lift will be achieved due to water's vapor pressure.
No is the short answer. There is probably no complete absence of atoms anywhere. As to how well scientists do in the lab, in vacuum spectroscopy, vacuums of the order of 10-16 mm Hg can be achieved. Probably CERN do better. [The curious measurement in mm of mercury of vacuum still is used.]
Yes; solid state rectifiers were made using values (also called vacuum tubes). ************************************************************* A solid state device is a semiconductor device. A valve (vacuum tube) is a thermionic device, so yes, rectification can be achieved with a thermionic rectifier.
In order to remove all the unwanted moisture and gases from the refrigerant system, a state of near-vacuum has to be achieved in which the pressure in the system is forced to go below the atmospheric pressure. The absolute value of the atmospheric pressure at sea level is given by 29.92 in. Hg or 14.696 psia In the typical system, the vacuum pump is required to create a vacuum. state of about 300 to 500 microns. An electronic vacuum gauge is needed to measure the level of vacuum in the system. Check the specifications of the vacuum pump and make sure that it is able to achieve the vacuum state as required by the manufacturers of the equipment.
The goodness of a vacuum is still measured in archaic units, millimetres of mercury. mmHg. The development of vacuum pumps was paralleled by the development of better vacuum gauges, but unfortunately not in lock-step. So folk invented a better pump, but the gauge showed not much improvement. Then soon after, a better gauge indicated a better vacuum had in fact been achieved! And next, an even better gauge was invented. And so on. In mass spectrometry, vacuum of the order of 10-16mm is achieved by using ion pumps. In which an electrical plasma is used to purge the vacuum by using electromagnetic fields to move the odd atoms left. (After several other pumps had reached their peak of performance in turn.)
The efficiency of the Rankine cycle depends on extracting as much energy from the steam flow through the turbine as possible, and to do this you need to have as low a vacuum in the condenser as possible. The lower the temperature of the cooling water flow through the condenser, the lower the vacuum that can be achieved. Cooling towers are often the best solution, though plants on a large lake or the ocean can use direct cooling supplies from that source and this may give better efficiency. It all depends on the cooling water temperature that can be achieved.
Everything is mostly space. The diameter of the sun is 865 thousand miles, which is a bit under a million. The radius of the earth's orbit is 93 million miles, almost 100 million. Sedna, which isn't even outside the solar system, orbits 900 times as far (currently).
why are vacuum flasks called vacuum flask
what has Richard Hammond achieved in
did Susan blow achieved
After years of hard work and dedication, she finally achieved her dream of becoming a doctor.