1. Making a Better Diet Soda
Team 2:
James Betz, Harold Rogers, Andrew Sanderson, Stephanie Schnelzer, Lauren Shirley, Patrick Stanton

2. Patent Background and Overview
Rebaudiosides A-E, sugar alternatives for Diet CSD
Natural derivatives of Stevia rebaudiana
200x potency of sugar
Reb. A normally used, Reb. D desired
Low Solubility of Reb. D
Need 3000 ppm, can achieve 500 ppm
Requires new process
Point of Patent: A Novel Concept
Reb. D in H2O, opposed to in syrup
Mix unsweetened syrup and sweetened water
Two Models
Pat

3. Two Options
Pat

4. Our Process vs Their Process
Lauren

5. Lauren

6. LabVIEW output Example 2.1
Sandy - After creating the LabView model of a CSTR reactor, the output results in a 1st order model with a step input. Therefore the transfer function shown was chosen
Process: Model Ex. 2.1 (Mixing CSTR), run program, initiate step change, pause, export to excel, graph, nonlinear regression, SSE results to reinforce accuracy

7. Nonlinear Regression SSE=6.127e-08
Sandy - After importing the data obtained from the LabView model into excel, we performed a nonlinear regression to determine the constants K, M, and tau. The experimental model found is very accurate, with a sum of squared errors of 6.127e-08. We noticed steady state value was reached after a while, around 10 tau. This is a problem we will talk about later.

8. Simulink Model Special Notes Random Number Generator Simout Tau=1.0548
Harry

9. Simulink Graph
Reaches SS value at about 11 seconds, max % error after reaching SS is 3.45%

10. Potential Improvements
Would have found limits
Valve and Transmitter
Safety system
Compare with the other model
Reach steady state faster
Guarantee our Success
Steph
Limits, find sensitivity limits in order to understand the ranges in which the process cannot function.
Type of valve, specific transfer function for the time between the valve receives the signal and enacts the change.
Transmitter, where they get read to where they get used
Steady State, alter transfer function in order to reach steady state in under 5tao

11. Conclusions Our model works The model is accurate within 5%
Time to steady-state is slow
Improvements can be made
Attractive product for Pepsico
James

12. Questions?
All