Saturated Water
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To 2 significant figures:
- Definition of Saturated Water
- Water boiling temperature depends on pressure.
- If you increase pressure, water will boil above 212F.
- Calculator - give it pressure - and it tells you what temperature water boils at and its energy content at that temperature - [1]
- 18 bar water is at 209C and 880kJ/kg, at 1 bar it is 100C and 420kJ/kg. At 18 bar, density is 860 kg/m3
- The difference beween the two is 460 kJ/kg that can be released as steam energy. This appears to be the stored energy that can be extracted by a steam engine
- Thus, a 10,000 gallon (38 cubic meter) tank at 18 bar contains 38*860 kg or 33,000 kg
- Energy releasable from this is 33,000*420kJ = 14 GJ.
- 1 GJ = 280 kWhr
- Thus 3920 kWhr
- Extracted at 15% efficiency, that is 590 kWhr
- WOW!
- This means that a 1000 gallon propane tank gets you about 60 kWhr at 18 bar!!!!!!!!
- For anyone that understands this, this is revolution and end of battery storage on a path to ecological means of storage via solar-heated saturated water.