Differences between revisions 4 and 5
⇤ ← Revision 4 as of 2013-09-14 19:36:51 →
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Editor: PieterSmit
Comment: Add link to water turbine power
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Size: 1087
Editor: PieterSmit
Comment: Add link to spreadsheet
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 * Calculations [[https://docs.google.com/spreadsheet/ccc?key=0AowdI0AHdjtzdFZsVEF0S2NGeEl0SXRLR3BzVW1sNGc&usp=sharing|Spreadsheet]]

Storing Energy in water as heat

  • Links eco/sunpower/SolarPanel , eco/water , eco/hydropower

  • Calculations Spreadsheet

  • E = cp dt m
    • cp = specific heat capacity 4.2 kJ/kgoC for water
    • dt = temperature difference between water stored and the surroundings
    • m = mass of water in kg
    • Example1 
      •      Energy stored in a 1000 liter water reservoir
     If water is heated to 90C and surrounding temperature is 20C
     E = 4.2 (kJ/kgC) x (90 - 20) x 1000 (liter@1kg/liter)
       = 294000 kJ
       = 81.7 kWh  (1kWh = 3600kJ)
    • Example2 
      •      How much energy (kWh) to heat geyser of 300l from 15C to 60C ?
     E = 4.2 (kJ/kgC) x (60 - 15) x 300
       = 56700 kJ
       = 15.8 kWh  (1kWh = 3600kJ)
    • heat of vaporization of water is 2256 kJ/kg

...

CategoryEcoFriendly

eco/WaterEnergyStorage (last edited 2015-07-15 09:30:54 by PieterSmit)