Overview of Status of Analysis, Design, Fabrication, Tests, etc.
Fabricate new bags (roll seals, conductive RTV, anti-static spray, etc)
Finalized Controlled test bed with 12 volt powered fan
We will conduct water loss testing through continuous weight measurements through rewiring of newly bought weight sensors
New Seal methods over Velcro (roll end Velcro to Velcro)
Accomplishments from Previous Week
We did multiple runs with different bags with new controlled test environment
Determined that new seal over Velcro is needed and double-layered bag is best
Able to get additional data and graphs on vapor pressure inside and outside of silk bag
Did further mass transfer analysis on new bag water loss tests to model Darcy’s Law
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Albert/Jordan: Get website updated especially the Gantt Chart
Albert: Document closely any small or big comments or suggestions made by instructor or lead sponsor during meetings
Kevin: Design and fabricate the L-shaped Noryl shading structure
Dylan: Making bags out of silk with final design.
Dylan: Noise performance testing at GroundMetrics
Jordan and Christian: Continuous water loss testing with multiple bags
Albert and Dylan: Wire scales to Arduino to finalize test setup.
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments
Rolling top end will probably not affect noise
Potato chip clip as clamped end will be noisy
Todor will do a quick noise test on Tyvek bag
There will be a big noise test with windowed RTV, double-layered bag, and original Silk bags on Friday
We will do more water loss testing with new bags doing more continuous measurements (rewiring newly bought sensors)
Instructor Comments from Last Meeting and Actions Taken to Address these Comments
RTV is a good adhesive to try out to lower water loss as well as Flexible epoxy
Velcro is probably among the biggest factors to water escaping as vapor from the bag
We conducted test between clamped and unclamped ended bags (clamped bags loss less water à Velcro is not a good seal)
Do as much necessary testing that seems reasonable
Risks and Areas of Concern
• RTV Silicone may need to be conductive
• Sewing machine damage due to RTV seam sealing
• Placement of the weight scales inside the heated box
• Temperature sensor inside bag may cause error in weight measurements
Resources or Information Required but not Available
What is the primary cause for water loss in the bag?
Noise performance of new bags (Tyvek, RTV, double-layered bag)
Schedule
Do more rigorous controlled water loss testing on new bags
Create new Sleeved bags and prototype Noryl Shading Structure
Update Gantt chart.
Budget (list amount spent and amount remaining)
Currently, we have only used approximately $500 out of the $1000 so far.
Total cost of the bags were $83.93 (materials and fabrication accounted for)
We ordered the bulk of our controlled water loss testing equipment, which cost us $74.19
Kevin spent about $25 for the heat gun
$98.16 for sensors
$210 for new bag materials and adhesives
Will spend on multiple weight sensor scales ($10 each)
Progress on Report and Webpage
Update the Gantt Chart
Added diagrams to controlled test bed
Upload Weekly Progress Report
Work on 2nd Draft of Final Report Paper