Today approximately half of the primary energy used in industrial processes is lost. Especially for waste heat at temperatures below 300 °C, there are hardly any methods that make sense from an economic standpoint and that are technically ready to be put to use. One exception is the Organic Rankine Cycle (ORC) technology. Instead of water, the waste heat heats an organic medium of carbon, fluorine, and oxygen. In a research project with the Moscow Power Engineering Institute and Moscow State University, Siemens is using an ORC working medium that under atmospheric pressure vaporizes at 49 °C and is environmentally friendly. Meanwhile, the first demonstrator units in Moscow are operating in the Russian plant of the German glass manufacturer Lauscha. The 100-kilowatt system there draws its energy from waste heat of just 220 °C from a glass fiber production line. This ORC unit generates approximately 800,000 kWh of electric power per year. The investment pays for itself in less than three years.