Question

using co - generation to create electricity can help improve efficiency in power plants to as high as which of these? 10% 25% 90%

Explanation:

Co - generation (also known as combined heat and power - CHP) is a process where a power plant produces electricity and also recovers and uses the waste heat. In traditional power plants, a significant amount of energy is lost as waste heat. In co - generation, this waste heat is put to use (for example, in heating applications). This leads to a much higher overall energy efficiency. While traditional power plants may have efficiencies in the range of 30 - 40% (for electricity generation alone), when the waste heat is utilized in co - generation, the overall efficiency (considering both electricity and the useful heat output) can be as high as around 90%. 10% and 25% are too low for the efficiency of a well - functioning co - generation power plant system.

Answer:

90%