Subcategories:

Biological Process and Design
Solar Process, Materials, and Design
Energy Storage
Wind and Water Movement Power Generation
Hydrogen Generation and Storage
Thermal Generation and Design
Triboelectricity and Electrolysis
Other

Biological Process and Design (BIO): Studies involving using biological processes to produce sources of energy such as in microbial fuel cells, algae, biomass, fossil fuels and waste.

Solar Process, Materials, and Design (SOL): The study and design of photovoltaics, including components such as collectors, concentrators, photoconductor composition and spectral sensitizers.

Energy Storage (EST): The study of battery and storage cell composition and design.

Wind and Water Movement Power Generation (FLD): The application of engineering principles and design concepts involving processes to generate power from fluid flow, including turbines design, angle of attack and surface optimization.

Hydrogen Generation and Storage (HYD): The application of engineering principles and design concepts involving hydrogen production, optimization, and storage for energy production.

Thermal Generation and Design (THR): Studies of generation of power from geothermal and other thermal sources, design, and processes.

Triboelectricity and Electrolysis (ELC): Studies involving the generation of electricity from a static charge, electrolysis reaction and charged particles.

Other (OTH): Studies that cannot be assigned to one of the above subcategories. If the project involves multiple subcategories, the principal subcategory should be chosen instead of Other.