Utilizing waste heat gasoline engine in the design and fabrication of a fin and tube evaporator for the Organic Rankine Cycle (ORC)

Awaludin Martin, R. Hartono, Reza Asrian
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Abstract

The excessive consumption of fossil fuels is causing environmental problems, which can be addressed by utilizing renewable energy sources such as hydro energy, biomass, solar heat, geothermal, and waste heat. In particular, the exhaust gas from gasoline engines presents an opportunity for energy recovery, as only 25% of the energy is utilized while the remaining 75% is wasted. A fin and tube type evaporator was designed, manufactured, and tested to utilize this exhaust gas in an Organic Rankine Cycle (ORC) system. The evaporator was designed with an outer tube diameter of 9.525 mm and a total tube length of 41.4 m, featuring 90 tubes and 135 fins with a total area of 14,325 m2. It achieved an average effectiveness of 94.33%. The results showed that the waste heat from the exhaust gas of a gasoline engine could be used as a source of energy in an ORC system with an efficiency of 2.13%. It results in 7.02 kJ/s of energy absorbed by the evaporator and a net power generated of 0.15 kJ/s. This research demonstrates the potential for utilizing waste heat from gasoline engines as an energy source to generate electricity.
余热汽油机在有机朗肯循环(ORC)翅管式蒸发器设计与制造中的应用
化石燃料的过度消耗造成了环境问题,这可以通过利用水力、生物质能、太阳能、地热和废热等可再生能源来解决。特别是,汽油发动机的废气提供了一个能量回收的机会,因为只有25%的能量被利用,而剩下的75%被浪费了。为了在有机朗肯循环(ORC)系统中利用这种废气,设计、制造并测试了翅片管式蒸发器。蒸发器设计外径9.525 mm,总管长41.4 m,共90根管,135片翅片,总面积14325 m2。平均有效率为94.33%。结果表明,汽油机尾气余热可作为ORC系统的能量来源,效率为2.13%。蒸发器吸收能量为7.02 kJ/s,产生净功率为0.15 kJ/s。这项研究展示了利用汽油发动机余热作为发电能源的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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