PEM燃料电池供电系统“单耗分析”及其减排效应

"Specific Consumption Analysis" and Emission-reduction Effect of a Proton-exchange-membrane(PEM) Fuel-cell Power Supply System

在介绍了属于低温燃料电池系列的质子交换膜燃料电池(PEMFC)工作原理、特性及PEMFC供电系统组成的基础上,运用"单耗分析"理论对系统进行了环节划分,分别建立了燃料单耗与成本单耗分析模型。以某实际PEMFC供电系统运行数据为依据,对系统进行了单耗分析,并与大电网供电比较分析了温室气体CO2与污染物NOx的减排效应。结果指出了PEMFC供电系统中各环节效率对燃料单耗与成本的影响程度;系统发供电年CO2减排率25%左右,NOx减排率达到了99.96%以上。具有较好的发展前景。

On the basis of a description of the working principle,properties and composition of a power supply system of proton-exchange-membrane fuel-cells(PEMFC) pertaining to a low-temperature fuel cell series,a segment division of the system in question was conducted by using the 'specific consumption analysis' theory,establishing respectively analytic models for fuel specific consumption and cost specific consumption.With the operating data of a real PEMFC power supply system serving as a basis,a specific consumption analysis was conducted of the system and the emission-reduction effect of greenhouse gas CO2 and pollutant NOx,also analyzed by comparing with the power supply from a large electric grid.The results of the study show the influencing degree of the exergy efficiencies in various links of the PEMFC power supply system on fuel specific consumption and cost.The annual CO2 emission-reduction rate of the system in power generation and supply approximates to 25% and NOx emission-reduction rate is over 99.96%,thus,exhibiting relatively bright development prospects.