27 : Energy and heat transfer engineering

27.010

Energy and heat transfer engineering in general

27.015

Energy efficiency. Energy conservation in general

27.020

Internal combustion engines

27.040

Gas and steam turbines. Steam engines

27.060

Burners. Boilers

27.070

Fuel cells

27.075

Hydrogen technologies

27.080

Heat pumps

27.100

Power stations in general

27.120

Nuclear energy engineering

27.140

Hydraulic energy engineering

27.160

Solar energy engineering

27.180

Wind turbine energy systems

27.190

Biological sources and alternative sources of energy

27.200

Refrigerating technology

27.220

Heat recovery. Thermal insulation