GB/T 27748.2-2013

This part of GB/T 27748 specifies the operating performance and environmental impact of fixed fuel cell power generation systems (hereinafter referred to as power generation systems).
This part applies to the following test methods:
—— Power output under specified operating conditions and transient operating conditions;
—— Power generation efficiency and thermal efficiency under specified operating conditions;
—— Environmental characteristics: for example, gas emissions and noise under specified operating conditions and transient operating conditions;
—— This standard does not provide electromagnetic compatibility (EMC) tests.
This part does not apply to small fixed polymer fuel cell power generation systems with an output electric power of less than 10 kW. IEC 622823201, which has not yet been issued, applies to this type of system.
Due to the different types and applications of fuel cells, as well as the different forms of input and output fluids and energy, power generation systems can have different subsystems. However, to evaluate the power generation system, this part defines a general system schematic and boundaries (see Figure 1). To determine the test boundaries of the power generation system, the following conditions are considered:
—— All energy recovery systems are included within the test boundaries;
—— Any type of electrical energy storage device is considered to be outside the test boundaries;
—— [ZK] The calorific value of input fuels (such as natural gas, propane gas, pure hydrogen gas, etc.) is calculated based on their state at the boundary of the power generation system.