We know that steam is the gaseous phase of water, so it has water in it. It also has considerable thermal energy, too, as water must be heated quite a bit (at STP) to turn it into steam. It is the thermal energy in steam which we use to drive so many different things, like turbines to generate electric power.
When water is heated, there is a relation between temperature and pressure at which the water and steam are in equilibrium. This applies up to 374 degC at which the corresponding pressure is 222 bar abs or 3220 psi abs. Beyond this temperature liquid water cannot exist and the steam is said to be supercritical.
At any temperature between 100 degC and 374 degC there will therefore be a pressure at which steam is just formed and this is said to be dry saturated steam. It is saturated because if the temperature drops even slightly at the same pressure, steam will condense. If at this same pressure the steam is further heated, it is said to be superheated because it is at a temperature higher than dry saturated steam would be. Superheated steam is desirable for use in steam turbines, because it prevents formation of water droplets as the steam is expanded through the turbine-the droplets could damage the turbine blades.
In the supercritical region above 374 degC steam will always exist whatever the pressure, so the concept of superheat does not apply here.
Steam is made by evaporating water.........Once the liquid reaches a boiling point it turns to vapor
H2O, water.
It's called steam when the vapor pressure of the water equals or exceeds atmospheric pressure.
Water molecules in a gaseous state.
water
condensate in the steam piping, probably due to improper slope of piping to allow condensate flow out.
Plumbing-wise? Water, oil, gas, steam
Heat makes atoms "dance around" a lot. They dance farther away from each other. This helps the syrup flow easily. Coldness makes the atoms stay closer together. That makes the syrup harder to flow.
My guess: its almost like boiled water. you know how the steam rises? same with the heat from the magma in the mantle. The magma itself is around 500-900 degrees celcius, so the heat is much less by the time it makes it to the surface of the earth. that is my guess
If you mean HOW does evaporation work, then I can answer that. First, say, it rains. It leaves a puddle. The sun then dries up the puddle because heat makes particles move faster, and in water's case, makes it into steam. The sun evaporates the water into steam that you can't really see, then carries it high into the sky. When the steam cools it becomes droplets of water that condense into a cloud and when it cools enough, into rain. The cycle continues.
se=steam evaporated/steam flow at start
Nozzles are designed to increase the steam velocity.
Yes, steam engines do have pistons and valves. The piston valve is shaped like a piston hence its name. It used to control the flow of live (boiler) steam into the cylinder and the flow of exhaust steam out of the cylinder.
Vascular tissue is the tissue which makes steam strong . As their are no such tissue in steam of aquatic plant it makes them weak.
kg/s
Steam economy is the ratio between total steam evaporated and steam consumed Se=Steam evaporated/steam flow at start should be above 1 for multi effect systems
The steam cleaner utilizes a solenoid valve to control the flow of the fuel to the combustion chamber. This solenoid is activated by a flow-switch when water is flowing through it.Ê
Hiss
in a radial flow turbine the steam enters the turbine in the direction of its radius and leaves it in the direction of the axis of the shaft. in a axial flow turbine the steam enters the turbine in the direction of the axis of the shaft and leaves the turbine in the same direction.
When dry and saturated steam is caused to expand in a nozzle,the actual measured steam flow is found to be greater than the theoretical calculated flow.This is due to the time lag in the condensation of steam & the steam remains in dry state instead of wet. Such a steam is called supersaturated steam. This time lag is cause due to the the face that, the converging part of the nozzle is to short and the steam velocity is too high that the molecules of steam have insufficient time to form droplets.
by controlling main steam flow
condensate in the steam piping, probably due to improper slope of piping to allow condensate flow out.