The internal combustion engine consumes gas and rotates the generator, generating electricity. The exhaust gases from the engine heat up the water, turning it into steam. After steam is produced, the exhaust still has enough heat to heat the water. In addition, water is also heated by cooling the engines. After the heat is released, the steam turns into condensate, which is returned to the production cycle in the form of hot water. All these processes are called "Cogeneration". As a result, the efficiency of gas combustion reaches a value of more than 90%, whereas the efficiency of a conventional thermal power plant is about 40%.