# Model description of R134a

1. Dec 21, 2009

### alexisonsmith

So by using the Jacobsen-Stewart modified 32-term BEW equation(MBWR-32) I am trying to calculated a graph which shows the deviation of density(y-axis) against temperature(x-axis)

I can calculate the pressure in terms of density using the following equation: P = ~ a,(T)p" + e-(p/~ )2 ~ a,(T)p 2"-17

I have the critical value for the pressure,density etc. However I do not know how to calculate the calculated density.......

If you see the attachment I am trying to draw Fig 1 on page 21

Thanks

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Last edited: Dec 21, 2009