ABSTRACT
Radiation energy can be converted to work, heat, chemical energy or electricity. Direct conversion to work is so far not well developed, but potential examples are the idea of sailing in space via photon wind, a combination of gravity and buoyancy in a solar chimney power plant or utilization of radiation pressure. By conversion to heat the enthalpy of any operating fluid is usefully increased. Conversion to chemical energy is photosynthesis and conversion to electricity occurs in photovoltaic.
