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Development Of Electrical Efficiency Measurement Techniques For 10 Kw-class Sofc System: Part I. Measurement Of Electrical Efficiency

机译：10千瓦级Sofc系统电效率测量技术的发展：第一部分。电效率的测量

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摘要

Measurement techniques to estimate electrical efficiency of 10 kW-class SOFC systems fueled by town-gas were developed and demonstrated for a system developed by Kansai Electric Power Company and Mitsubishi Materials Corporation under a NEDO project. Higher heating value of the fuel was evaluated with a transportable gas sampling unit and conventional gas chromatography in AIST laboratory with thermal-conductivity and flame-ionization detectors, leading to mean value 44.69 MJ m~(-3) on a volumetric base for ideal-gas at the standard state (0℃, 101.325 kPa). Mass-flow-rate of the fuel was estimated as 33.04 slm with a mass-flow meter for CH_4, which was calibrated to correct CH_4 flow-rate and effect of sensitivity change and to obtain conversion factor from CH_4 to town-gas. Without calibration, systematic effect would occur by 8% in flow-rate measurement in the case for CH_4. Power output was measured with a precision power analyzer, a virtual three phase starpoint adapter, and tri-axial shunts. Power of fundamental wave (60 Hz) was estimated as 10.14 kW, considering from total active power, total higher harmonic distortion factor, and power consumption at the starpoint adapter. The electrical efficiency was presumed to be 41.2% (HHV), though this mean value will be complete only when uncertainty estimation is accompanied.
机译：在关东电力公司和三菱材料公司在NEDO项目下开发的系统中开发并演示了用于估算由城镇燃气供能的10 kW级SOFC系统的电效率的测量技术。在AIST实验室中，使用便携式气体采样装置和常规气相色谱仪，通过热导率和火焰电离检测器，评估了燃料的更高的热值，得出基于体积的平均值44.69 MJ m〜（-3），对于理想的-标准状态下的气体（0℃，101.325 kPa）。用质量流量计CH_4估算的燃料质量流量为33.04 slm，该流量计经过校准以校正CH_4流量和灵敏度变化的影响并获得从CH_4到城市煤气的转换因子。如果不进行校准，则在CH_4的情况下，流量测量会产生8％的系统性影响。使用精密功率分析仪，虚拟三相星点适配器和三轴分流器测量功率输出。考虑到总有功功率，总较高谐波失真因子和星点适配器的功耗，基波功率（60 Hz）估计为10.14 kW。电气效率被假定为41.2％（HHV），尽管只有伴随不确定性估计时该平均值才能完整。

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