At present

researches on field test of circulating fluidized bed(CFB) units mainly focuse on the optimization adjustment and coal blending

few scholars use ASME PTC4 standard to carry out the study. In this paper

ASME PTC4-2008 standard is applied to analyze the performance test of a supercritical 350 MW CFB unit in a domestic coal-fired power plant

which mainly involves the boiler system boundary

boiler efficiency

dry desulfurization rate

calcium sulfur mole ratio

mass flow of desulfurizer and fuel. When calculating the standard coal consumption rate of power supply

two calculation methods

namely regarding the residual heat income of slag cooler as the effective heat output of boiler or as a heat loss of the boiler

are compared in detail for their influences on the boiler efficiency and the heat consumption rate of steam turbine as well as the standard coal consumption rate of power supply

so as to prevent repeated calculation and missing calculation for heat absorption of slag cooler

and the test case is illustrated. The results show that

the two treatment methods have great influence on boiler efficiency and steam turbine heat rate

the relative deviation is 0.94% and 0.99% respectively

but the standard coal rate of power supply is basically the same

the relative deviation is only 0.05%. The research can provide a reference for performance test of the same type of units.