The first law of thermodynamics is universally used in steady-state modeling and performance analysis of power plant cycles. Mass and energy balances may be effectively utilized in analyzing and evaluating turbine cycle performance issues and associated heat rate and capacity losses.

Utilizing a case study for a fleet of coal-fired power plants and different examples, this paper examines applications of heat balance techniques in evaluating and quantifying performance losses. The focus of the paper will be in analyzing, diagnosing and quantifying performance, operation and reliability issues for the turbine cycle and major equipment.

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