Energy and exergy analyses of skipped cycle mode in a single-cylinder engine fuelled with diesel and natural gas

Tuncer E., Doğan B., Sandalcı T., Erol D.

INTERNATIONAL JOURNAL OF EXERGY, cilt.39, sa.2, ss.173-194, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 39 Sayı: 2
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1504/ijex.2022.125523
  • Dergi Adı: INTERNATIONAL JOURNAL OF EXERGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.173-194
  • Anahtar Kelimeler: natural gas, skipped cycle, pollutant emissions, energy analysis, exergy analysis, SPARK-IGNITION ENGINES, COMBUSTION, INJECTION, PERFORMANCE, STRATEGIES, CNG, EMISSIONS
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

In this study, performance and exhaust emissions were examined experimentally at different engine loads (25%, 50%, and 75%) at a constant speed of 1,500 rpm using pure diesel before modifications and pure natural gas (NG100) after modifications. Furthermore, experimental studies were conducted under 2 normal-1 skipped cycle (2N1S) and 3 normal-1 skipped cycle (3N1S) conditions using pure natural gas as a fuel in a converted spark-ignition engine. In the present study, energy and exergy analyses were performed using the performance and exhaust emission values obtained from experiments. As a result of the energy analysis, effective thermal efficiency values of 39.46% and 34.37% were found in diesel and natural gas fuels, respectively, at an engine load of 75% without cycle skipping. It was observed that the effective thermal efficiency value reached the maximum value of 35.99% in case of cycle skipping in natural gas and at an engine load of 50%.