18010

NG Transmission and Distribution

This process is representing a single pipeline of 500 statute miles in GREET1_2011. The fuels used by the pipeline to power to compressors are : - Electricity - Natural Gas

The fuel usage is calculated using the regular Pipeline Mode calculations.

Losses

This process assumes some losses, as for most of the transportation processes, the losses does not have an impact on the process fuels usage. So we can imagine that as being lost at once before entering the pipeline instead of being integrated over the length of the pipeline. However the data collected presented in Burnham and al. 2011 is given per 600miles. The losses considered over the whole distance of the same kind of pipeline is CH4 leakage is a function of pipeline transmission distance. Here, 0.387 vol% CH4 leakage is assumed in NG Transmission and Storage and 0.278 vol% leakage in distribution for a distance of 600miles.

In GREET now we can define losses per an amount of distance : ${\frac {(0.387+0.278)}{600}}={\frac {0.665}{600}}\left[{\frac {\%}{miles}}\right]$

As we are working in SI units in GREET, we need to convert that in %/meter which gives us : ${\frac {0.665}{600}}\left[{\frac {\%}{miles}}\right]=>6.88686404\cdot 10^{-7}\left[{\frac {\%}{meter}}\right]$ represented as 6.88686404E-09 in ratio/meter in the GREET database