Chidambaranathan Bibin, Kumarasami Devan Ponnusamy, Soundararajan Gopinath, Thulasiram Ramachandran
Department of Mechanical Engineering, R.M.K. College of Engineering and Technology, Chennai, India.
Department of Automobile Engineering, Jain University, Bengaluru, Karnataka, India.
Environ Sci Pollut Res Int. 2023 May;30(22):61177-61189. doi: 10.1007/s11356-022-20211-3. Epub 2022 Apr 14.
The increasing demand for energy consumption because of the growing population and environmental concerns has motivated the researchers to ponder about alternative fuel that could replace diesel fuel. A new fuel should be cheaply available, clean, efficient, and environmentally friendly. In this paper, the engine operated with neat punnai oil blends with diesel was investigated at various engine load conditions, keeping neat punnai oil and diesel as base fuels. The performance indicators such as brake specific energy consumption (BSEC), brake thermal efficiency (BTE), and exhaust gas temperature (EGT); emission indicators such as carbon monoxide (CO), oxides of nitrogen (NOx), and smoke opacity; and combustion parameters like cylinder pressure and heat release rate were examined. The brake thermal efficiency of diesel is 29.2%, whereas it was lower for neat punnai oil and its blends at peak load conditions. Concerning the environmental aspect, oxides of nitrogen emission showed a decreasing trend with higher smoke emissions for Punnai oil blends. Detailed combustion analysis showed that on smaller concentrations of punnai oil in the fuel blend, the duration of combustion has improved significantly. However, for efficiency and emissions, the P20 (20% punnai oil and 80% diesel) blend performs similar to that of diesel compared to all other blending combinations. When compared with diesel, the P20 blend shows an improvement in BSEC by 26.37%. It also performs closer in HC emission, a marginal increase in smoke opacity of 4% with reduced NOx and CO emission of 7.9% and 4.65% respectively. Power loss was noticed when neat punnai oil and higher blends were used due to the high density and low calorific value of punnai oil blends which leads to injecting more fuel for the same pump stroke.
由于人口增长和环境问题导致的能源消耗需求不断增加，促使研究人员思考能够替代柴油燃料的其他燃料。一种新燃料应该价格低廉、清洁、高效且环保。在本文中，以纯楝树油和柴油为基础燃料，研究了在各种发动机负载条件下使用纯楝树油与柴油的混合燃料运行的发动机。考察了制动比能量消耗（BSEC）、制动热效率（BTE）和排气温度（EGT）等性能指标；一氧化碳（CO）、氮氧化物（NOx）和烟度等排放指标；以及气缸压力和热释放率等燃烧参数。柴油的制动热效率为29.2%，而在峰值负载条件下，纯楝树油及其混合燃料的制动热效率较低。在环境方面，对于楝树油混合燃料，氮氧化物排放呈下降趋势，但烟排放较高。详细的燃烧分析表明，在燃料混合物中楝树油浓度较小时，燃烧持续时间有显著改善。然而，就效率和排放而言，与所有其他混合组合相比，P20（20%楝树油和80%柴油）混合燃料的性能与柴油相似。与柴油相比，P20混合燃料的BSEC提高了26.37%。在碳氢化合物排放方面它也表现相近，烟度略有增加4%，同时氮氧化物和一氧化碳排放分别降低了7.9%和4.65%。当使用纯楝树油和更高比例的混合燃料时，由于楝树油混合燃料的高密度和低热值，导致在相同的泵冲程下需要喷射更多燃料，从而出现了功率损失。
