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Hydrogen and wood-burning stoves.

Adriana Palacios1, Derek Bradley2

  • 1Department of Chemical, Food and Environmental Engineering, Fundacion Universidad de las Americas Puebla, Puebla 72810, Mexico.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|February 28, 2022
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Wood-burning stoves are inefficient and produce harmful emissions. Replacing them with hydrogen (H2) fuel offers a cleaner, more efficient cooking solution, though challenges remain in hydrogen

Keywords:
COblow offdecarbonizationhydrogenparticulateswood stoves

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Area of Science:

  • Energy systems research
  • Combustion science
  • Environmental engineering

Background:

  • Traditional wood-burning stoves, particularly in developing regions like Kenya and Mexico, suffer from low energy efficiency, with only 24% of energy reaching the cooking pot.
  • Combustion of charcoal in these stoves releases significant amounts of carbon monoxide (CO) and high indoor concentrations of particulate matter (PM2.5), posing health risks.
  • The study addresses the need for resilient and cleaner energy systems, as highlighted by the theme issue.

Purpose of the Study:

  • To review the performance of wood-burning stoves in Kenya and Mexico.
  • To explore the potential of hydrogen (H2) as a cleaner fuel alternative for cooking.
  • To discuss the technical aspects and challenges of implementing hydrogen-based cooking solutions.

Main Methods:

  • Analysis of energy transfer efficiency in a Kenyan charcoal stove.
  • Measurement of CO and particulate matter emissions from wood-burning stoves.
  • Theoretical evaluation of hydrogen jet flame combustion for a potential hob design.

Main Results:

  • The Kenyan stove exhibited low energy efficiency (24%) and initial CO levels of 3%, with high indoor PM2.5 concentrations.
  • Average burning rate was 10 kW over 20 minutes, with a peak of 30 kW.
  • A hydrogen (H2) hob with approximately 10 small jet flames could provide sufficient heat with improved efficiency, releasing 0.84 kW per 2mm jet flame.

Conclusions:

  • Hydrogen (H2) presents a viable, efficient, and cleaner alternative to traditional wood-burning stoves.
  • Challenges such as the low mass-specific energy of H2 and combustion control need to be addressed for widespread adoption.
  • The transition to H2 fuel is dependent on sustainable energy sources like wind, water, or byproduct generation from natural gas (CH4).