Concentrated solar power, IBM research. Close-up of a High Concentration PhotoVoltaic Thermal (HCPVT) prototype being tested at IBM Research-Zurich, Switzerland. The prototype system uses a large parabolic dish with a tracking system to determines optimum alignment. Sunlight is reflected onto microchannel-liquid cooled receivers with triple-junction photovoltaic chips. These are mounted on microstructured layers that pipe liquid coolant to within a few tens of micrometres to absorb heat and draw it away 10 times more effectively than with passive air cooling. This allows high concentrations of solar power. Photographed in August 2012.