Assunto em inglês
Low cost
9
PVC tubes
3
Recycling
3
Solar energy
3
Alternative solar collector
2
Alternative solar system
2
Alternative thermal reservoir
2
Reuse of materials
2
Solar collectors
2
Water heating
2
Water solar heating
2
Communities
1
Composite
1
Drying of tropical fruits
1
Heating solar water
1
Housing
1
Microorganisms
1
Recycled materials
1
Solar collector
1
Solar cooker
1
Solar disinfection of water
1
Solar drying
1
Solar oven
1
Thermal resistance
1
Waste recovery
1
baking (cooking) food
1
low cost
1