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School Bus CNG¤

School Bus Overview¤

The School Bus is engineered to transport 15 or more passengers, serving primarily in the conveyance of students to and from educational institutions.

School Bus Performance Metrics¤

  • Annual Distance (dannual): The school bus covers an annual distance of 24,000 km.
  • Average Occupancy Rate (nlpv): It boasts an average loading capacity accommodating 47 passengers per vehicle.
  • Utilization Window: The vehicle is utilized for 5.26 hours per day, translating to a 22% capacity utilization, according to the study by Duran and Walkowicz1.
  • Reference Capacity: The reference capacity, derived from these parameters, is calculated to be 585.31 passenger-kilometers per hour (pkm/h), utilizing the formula:
\[ ref_{size} = \dfrac{d_{annual} \cdot n_{lpv}}{8760 \cdot c_p} \]

Where cp represents the capacity utilization percentage. Where the denominator reflects the total hours in a year multiplied by the capacity utilization factor.

CNG¤

Natural gas can be used in modified internal combustion engines. Compressed natural gas does, however, require more storage space than gasoline and diesel, since it is a gas rather than a liquid. A tank to store natural gas generally requires extra space in the trunk of the car or on the bed of the van. This space issue can, however, be resolved during construction, by installing the tank under the bodywork.

Compressed Natural Gas (CNG), primarily methane stored at high pressure, has an LHV of 35.8 [MJ/m3] and a density of 0.777 [kg/m3].

ES Model Parameters¤

All the parameters concerning the School Bus CNG are listed in the table below.

entry_key value unit sets source_reference
CO2_E (layer) 0.013 kg_CO2 NA Agez, Maxime; Ménard, Jean-François; Saunier, François, (2022): "Analyse du Cycle de Vie de Filières Énergétiques et de Leur Utilisation pour le Transport Routier au Québec – Partie 2 : Utilisation"
MOB_PUBLIC_LOCAL (layer) 1 pkm NA Agez, Maxime; Ménard, Jean-François; Saunier, François, (2022): "Analyse du Cycle de Vie de Filières Énergétiques et de Leur Utilisation pour le Transport Routier au Québec – Partie 2 : Utilisation"
NG_HP (layer) -0.073 kWh NA Agez, Maxime; Ménard, Jean-François; Saunier, François, (2022): "Analyse du Cycle de Vie de Filières Énergétiques et de Leur Utilisation pour le Transport Routier au Québec – Partie 2 : Utilisation"
c_inv 297.62 CAD/(pkm/h) NA Agez, Maxime; Ménard, Jean-François; Saunier, François, (2022): "Analyse du Cycle de Vie de Filières Énergétiques et de Leur Utilisation pour le Transport Routier au Québec – Partie 2 : Utilisation"
c_maint 64.77 CAD/(pkm/h)/y NA Agez, Maxime; Ménard, Jean-François; Saunier, François, (2022): "Analyse du Cycle de Vie de Filières Énergétiques et de Leur Utilisation pour le Transport Routier au Québec – Partie 2 : Utilisation"
lifetime 15 y NA Agez, Maxime; Ménard, Jean-François; Saunier, François, (2022): "Analyse du Cycle de Vie de Filières Énergétiques et de Leur Utilisation pour le Transport Routier au Québec – Partie 2 : Utilisation"
ref_size 585.31 pkm/h NA Agez, Maxime; Ménard, Jean-François; Saunier, François, (2022): "Analyse du Cycle de Vie de Filières Énergétiques et de Leur Utilisation pour le Transport Routier au Québec – Partie 2 : Utilisation"

References¤

Data Sources
Agez, Maxime; Ménard, Jean-François; Saunier, François. (2022). "Analyse du Cycle de Vie de Filières Énergétiques et de Leur Utilisation pour le Transport Routier au Québec – Partie 2 : Utilisation"

  1. Adam Duran and Kevin Walkowicz, “A Statistical Characterization of School Bus Drive Cycles Collected via Onboard Logging Systems,” SAE International Journal of Commercial Vehicles 6, no. 2 (September 24, 2013): 400-406, https://doi.org/10.4271/2013-01-2400 ⧉. ↩