##master-page:HomepageReadWritePageTemplate
##master-date:Unknown-Date
#format wiki
#language en
= Storing Energy in water as heat =
 * Links [[eco/sunpower/SolarPanel]] , [[eco/water]] , [[eco/hydropower]] , [[eco/BatteryStorage]]
 * Calculations [[https://docs.google.com/spreadsheet/ccc?key=0AowdI0AHdjtzdFZsVEF0S2NGeEl0SXRLR3BzVW1sNGc&usp=sharing|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