Author Archives: cacdiaz

Week 10 Update

We revived our chlorine tests this week and found the following: 1.  The non-return valves we installed about a month ago are working properly—we no longer see chlorine contamination in our water reservoir! 2.  After dropping our starting chlorine concentration … Continue reading

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Week 9 Update

This week, we devoted most of our testing time to investigating the effect of varying pumping speed, as well as the height of our chlorine source relative to our water source.  We found that slower pumping speeds resulted in higher … Continue reading

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Week 8 Update

So far this week, we tested our three current prototypes to see which one allowed the most consistent dosing of our water supply.  Continuing our simplified testing setup from last week, we measured the ratio of water to chlorine taken … Continue reading

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Week 7 Update

Our latest development (largely thanks to Kara) has been a simplified testing approach for evaluating how consistently our device doses a given volume of water flowing past it.  We assume that the volume of chlorine entering our water supply is … Continue reading

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Week 6 Update (Libby’s 2nd Visit)

This week, Libby Wayman stopped by our meeting to follow up on how the team was doing since her last visit.  While we were intending to discuss failure modes & other strategic methods for critically assessing our project, we ended … Continue reading

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Week 5 Update

This week, we acquired a store-bought non-return valve.  Good news: it was only $15, it fits our pipe, and it seals really well in one direction without causing a noticeable inhibition of flow in the other.  Unfortunately, we found that … Continue reading

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Week 4 Update

On the testing end, we continued troubleshooting the non-return valve.  So far, all the designs we’ve tested have been leaky!  Also, we’ve been measuring unusually low concentrations of chlorine with our set-up, despite our highest-ever chlorine stock concentration (0.66%).  The … Continue reading

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