Exergy analysis of an inter-city bus air-conditioning system

TOSUN E., BİLGİLİ M., TUCCAR G., YAŞAR A. N., AYDIN K.

INTERNATIONAL JOURNAL OF EXERGY, cilt.20, sa.4, ss.445-464, 2016 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 20 Sayı: 4
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1504/ijex.2016.078094
  • Dergi Adı: INTERNATIONAL JOURNAL OF EXERGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.445-464
  • Anahtar Kelimeler: exergy, exergy efficiency, inter-city bus, air conditioning, exergy destruction, COP, coefficient of performance, air mixing ratio, cooling load, isentropic efficiency, thermal transmittance, psychometric diagram, sensible and latent heat gains, THERMODYNAMIC ANALYSIS, THERMAL COMFORT, COOLING LOAD, VEHICLE
  • Çukurova Üniversitesi Adresli: Evet

Özet

In this paper, exergy analysis was implemented to improve the intercity bus air-conditioning (AC) system design. Firstly, an inter-city bus with a passenger capacity of 56 people was selected and then its hourly cooling load capacity was determined with the help of cooling load hourly analysis program (HAP). Analyses were performed for different air mixing ratios (MRs) and seasons. Coefficient of performance (COP), exergy efficiency (psi) and exergy destructions (Exdest) of whole system and its each sub-units were evaluated. Results demonstrated that the atmospheric air temperature and air MR substantially affect the inter-city bus AC systems' performance. According to the results obtained for July, when air MR is 0.5, maximum exergy destruction value was calculated as 6.96 kW at compressor. Exergy destruction values were computed as 2.78, 2.61 and 0.99 kW for evaporator, condenser and expansion valve, respectively.