Abstract
The article gives an overview of the possibilities to upgrade power plant cogeneration turbines efficiency by using low grade heat transfer agents to heat water in cogeneration systems and to increase electricity production in the heat-end mode operations. It brings up technologies based on using turbine full-flow condensate to heat initial water found in additional heaters implemented in the cogeneration turbine recovery system. Introduction of these technologies leads to an increase in steam consumption and to a decrease in enthalpy of regenerative turbine stage steam to heat the condensate, which consequently increases combined heat and power electricity production. An experimental research of cogeneration turbine recovery systems is carried out to find out the minimum and maximum initial water flow through the surface heaters implemented in the turbine recovery system and graphs are built to show the correlation between the initial heated water flow and full-flow turbine condensate temperature.
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