What makes steam flow?

Answer 1

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.

Answer 2

Steam flows due to the differences in pressure between the source of the steam (e.g., boiler) and the location where the steam is intended to be used. The high-pressure steam moves towards areas of lower pressure, causing it to flow through pipes and conduits to power various systems or equipment.

Answer 3

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.

Answer 4

Steam is made by evaporating water.........Once the liquid reaches a boiling point it turns to vapor

Answer 5

H2O, water.

It's called steam when the vapor pressure of the water equals or exceeds atmospheric pressure.

Answer 6

Water molecules in a gaseous state.

Answer 7

water