156B Week 5

Overview of Status of Analysis, Design, Fabrication, Tests, etc.

• • Filter

    • https://en.wikipedia.org/wiki/Mesh_(scale)

      • Using Mesh Scale, can find the proper size mesh to buy in the future

      • Optimal size hole for our filters would be 0.019-0.022 inches which is Mesh number of 35-30

  • Too small of a mesh will have the fine spices clog the filter so that the tea will not filter out

    • • small amount of spices in the tea is okay as long as bulk of spices is not in tea

  • Oversteeping

    • currently not an issue due to not being able to reach the proper brewing temperature

    • will become one when we find adequate heating for the brew container

      • when that happens we will test to measure when the tea is properly brewed and then strain it into the kettle

  • Stirring

    • Individual parts tested and functional

    • Speed is more than enough to negate boilover

  • Heating

  • Valves

Accomplishments from Previous Week

• • Stirring

    • Maximum distance for magnetic force to hold stirrer tested

    • Motor direction reversal tested

    • Minimum stirring speed to fight boilover tested

    • Maximum stirring speed tested

    • Cylindrical magnetic stirrer (not food safe) constructed

  • Tea taste tests (pot vs coffeemaker, understeep vs oversteep)

Goals for Next Week (list names after each item). Use specific and measurable objectives.

• • Find/construct food safe shell/container or stirrer (Ian)

  • Find optimal filter shape/size (Arun)

  • Make more chai with varying boldness and with different methods (Shahin/Soo)

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

• • No meeting

  • Check to see if reversing polarity reverses the motor direction (Jan 30 via Whatsapp)

Instructor Comments from Last Meeting and Actions Taken to Address these Comments  (indicate date of comments and if via email or in person)

Comments from Other Students in the Class (indicate date of comments and if via email or in person)

Risks and Areas of Concern

Resources or Information Required but not Available

Schedule

Budget (list amount spent and amount remaining)

• • ~$200.00 spent; ~$800 remaining

Progress on Report and Webpage