Tuesday, October 3, 2017

Week 6: Energy Calculation

Tan, Matthew, and myself have conducted energy calculations using the equation in the documents, 2016-06-13.BJF.EnergyCalculation.pdf and Case Study of a Solar Power Installation for an Automated Transit Network in San José.

The calculation was done using Microsoft Excel. Our calculated value was 3.51E+06 kWh or J (=3510000 kWh or J) while the value on the pdf file was 3.68E+06 kWh or J (=3680000 kWh or J). Our computed average trip time (t_s) was 4.794297 minutes which was approximately equal to value (=4.8 minutes) on the paper.

ρ (rho) value was unclear in the calculation. It was given as 1.275 kg/m^3 (air density) on page 5 of the pdf file. However, it was provided as motor efficiency on page 2 (Nomenclature) of the pdf file. Our calculation was done substituting the air density value 1.275 kg/m^3 into rho (ρ ) value.

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