Design of an Energy Saving Cook Pot

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Design of an Energy Saving Cook Pot

• Alan Berick
• Aprovecho Research Center

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Heat losses from the standard test pot while
cooking

• Evaporation - 78
• Radiation - 16
• Convection - 6

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Pot configurations tested

• Standard test pot(WBT)
• Standard test pot with lid(WBT/LID)
• Experimental pot(EXP)
• Experimental pot with added olive oil(EXP/OIL)

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Average Time to Reach Boiling for each Pot
Configuration
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Average energy/liter to reach boiling for each
configuration
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Evaporation loss during the high power boiling
phase
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Energy required to simmer for 30 minutes at 96oC
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Evaporation loss during 30 minutes of simmering
at 96oC
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Summary of the Results
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Summary of Results with India Rocket Stove
High Power Std. Pot Exp. Pot
Specific fuel consumption (gm/liter) 76.37 73.08
Time to boil (min) 28.7 24.9
CO emission (gm/liter) 1.78 1.77
PM emission (mg/liter) 105 127
Simmer 45 min
Specific fuel consumption (gm/liter) 78.06 42.91
CO emission (gm/liter) 1.6 2.3
PM emission (mg/liter) 48 18
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Heat retention properties of the experimental pot
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Rocket Stove With Air Limiting Door Open
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Rocket Stove with Air Limiting Door Closed
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Charcoal Simmer Runs
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Performance Comparisons
Description WBT Pot EXP. Pot
Fuel to Cook 5L (850) gm 793 383
CO to Cook 5L (20) gm 22 10.8
PM to Cook 5L (1500) mg 1081 441
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Summary

• The experimental pot requires 2/3rds less energy
  in the simmering phase than the standard pot.
• The experimental pot requires 20 less energy to
  bring to a boil than the standard pot
• The experimental pot uses the same quantity of
  energy to simmer without a lid as the standard
  pot with a lid.
• The experimental pot can easily be converted to a
  retained heat cooker.
• The experimental pot will simmer for 45 min.
  using only the residual charcoal from the boiling
  phase.

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Comparison WBT Pot With Lid and Exp. Pot/oil