Experimental investigation of hydrogen energy share improvement in a compression ignition engine using water injection and compression ratio reduction
Experimental investigation of hydrogen energy share improvement in a compression ignition engine using water injection and compression ratio reduction
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DOI：
10.1016/j.enconman.2015.10.069
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发表时间：
2016-01
影响因子：
10.4
通讯作者：
V. Chintala;K. Subramanian
中科院分区：
文献类型：
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作者：
V. Chintala;K. Subramanian
本文研究了在压燃式发动机（额定功率7.4 kW，转速1500 rpm）中，在双燃料模式下，添加水对提高最大氢能量份额的影响。比耗水量（SWC）变化从130到480克/千瓦时，在70克/千瓦时的步骤，使用歧管和端口注入方法。随后，研究了发动机压缩比（CR）的降低（从19.5：1（基础）到16.5：1和15.4：1）沿着添加水对进一步提高氢能量份额的组合效果。氢能源份额被限制到18.8%，与传统的双燃料模式，由于爆震。然而，能量份额增加到66.5%与水的添加（最大SWC：480克/千瓦时），和79%与组合控制策略（SWC的340克/千瓦时和CR减少到16.5：1）。加水双燃料模式下发动机的热效率高于基础柴油模式（单燃料模式），但低于常规无水双燃料模式。具有降低的CR和水添加的发动机的效率低于常规双燃料模式，然而在16.5：1的CR和340 g/kW·h的SWC下，效率与基础柴油模式效率相当。碳氢化合物，一氧化碳，烟雾和氮氧化物的排放量的发动机与水的添加（340克/千瓦时）和CR减少（至16.5：1）显着下降相比，基础柴油模式，但略高于传统的双燃料模式。
This study deals with the effect of water addition on enhancement of maximum hydrogen energy share in a compression ignition engine (7.4 kW rated power at 1500 rpm) under dual fuel mode. The specific water consumption (SWC) was varied from 130 to 480 g/kW h in step of 70 g/kW h using manifold and port injection methods. Subsequently, the combined effect of reduction of compression ratio (CR) of the engine (from 19.5:1 (base) to 16.5:1 and 15.4:1) along with water addition on further enhancement of hydrogen energy share is investigated. The hydrogen energy share was limited to 18.8% with conventional dual fuel mode due to knocking. However, the energy share increased to 66.5% with water addition (maximum SWC: 480 g/kW h), and 79% with combined control strategies (SWC of 340 g/kW h and CR reduction to 16.5:1). Thermal efficiency of the engine under water added dual fuel mode is higher than base diesel mode (single fuel mode), but it is lower than the conventional dual fuel mode without water. The efficiency of the engine with reduced CR and water addition is lower than the conventional dual fuel mode, however at the CR of 16.5:1 and SWC of 340 g/kW h, the efficiency is comparable with base diesel mode efficiency. Hydrocarbon, carbon monoxide, smoke, and oxides of nitrogen emissions of the engine with water addition (340 g/kW h) and CR reduction (to 16.5:1) decreased significantly as compared to base diesel mode, but slightly higher than conventional dual fuel mode.