Interchangeability Analysis of a Domestic Cooktop Burner

07/06/2022

Hydrogen is increasingly being placed on the road to face climate change and achieve a decarbonised economy. In fact, green hydrogen can be produced by renewable energy during periods of over production, thus reducing the need for batteries. In addition, hydrogen is a great energy carrier, that could be injected into the natural gas network. Therefore, the interchangeability of household appliances, either for safety reasons or fitness for purpose, is key to progress towards sustainability. The current work studied the impact of several NG − H2 mixtures on a domestic cooktop burner, in order to assess the flame stability, flashback risk and burner noise. The fitness for purpose was examined by conducting cooking efficiency experiments, which relied on heating water inside a pan and conduct its energy balance. A second cooking efficiency method based on the heat transfer equations was developed, which relied on PIV experiments to study the flow behaviour. In addition, the experiments were conducted through 3 different sized burners, to explore the impact of the burner power and dimensions, on the parameters mentioned so far. Slow cooking proved to be the path for sustainability and cost reduction, by providing a higher cooking efficiency (≈ +15%) and lower costs (≈ −25%) when compared to fast cooking. Finally, the results from both methods met and a mathematical model was developed. This model uses the operating conditions to predict the cooking efficiency, thus extrapolating the results.

Authors in the community:

• 

  E

  Eduardo Maria Soares Rodrigues

  ist187478

Supervisors of this institution:

• 

  A

  Ana Filipa da Silva Ferreira

  ist90347

• 

  E

  Edgar Caetano Fernandes

  ist13408

mechanical-engineering - Mechanical engineering

por - Portuguese

Instituto Superior Técnico