Pure steam generator

One litre of water contains 1 kg of water. If all of that is evaporated we get 1 kg of steam, or 1000 grams.

Greg

...less the weight of any impurities left behind, measured as "Total Dissolved Solids" [TDS] in the feedwater. Also, the density of water varies slightly with temperature.

how to measure total dissolve solid (TDS) in 1 kg water.? If purified water is there any percentage of TDS.

You are comparing volume (Liters) to weight (lbs),

This is sort of like apples and oranges..

You still have the same number of pounds (weight) of steam as you had when it was water. (don't confuse pounds of pressure with pounds of weight)

Note that the amount of heat energy required for his conversion very high.

1 liter of water = 1 kilogram, so the conversion is accurate. Actually, not quite, since the kg is a unit of mass, not weight, But here on Earth, it doesn't really make a difference.

Pure Steam--- I thought that pure steam is the ultimate expansion of x volume of water into steam vapor- where the steam now occupies 1600 times x. This is the ultimate aim of the steam engine- that is -to take advantage of this expansion in a reciprocating piston type steam engine. There are several mechanical devices that were used to achieve this end- including the "economiser" and "steam dryer" where either pre heated water was injected into the expansion chamber, or waste heat was re-used to "dry" or finally expand the remaining "unexpanded" water. Similar to a turbo charger that attempts to utilize all heat by recapturing, and efficiently applying and thus converting all ( as much as possible) heat into usable mechanical energy.

ODD Parts

The source of the water you are using for this exercise will impact significantly on the total dissolved solids hence the amount of distillate. However, for 1 litre of water, you should get close to 1 kg of distillate.