Preliminary Detailed Design
Team Vision for Preliminary Detailed Design Phase
Goals of Phase:
This phase was devoted to preparing for the Detailed Design Phase by making sure all requirements to accomplish the demands of detailed design are met for that time.These tasks were as follows:
- Develop detailed CAD drawings of design for final assembly
- Update block diagrams to reflect the finer details of the design
- Analyze risks and identify highest risk components
and how they will be addressed
- Pump, tubing, valves, controls
- Review engineering/customer requirements and update where necessary
- Research industry standards and identify where they apply to project
- Develop a detailed and revision-conducive test plan
- Compile the Bill of Materials of both the prototype
and final Keg Washer
- The breakdown of parts, prices and their quantities
Feasibility: Prototyping, Analysis, SimulationDynamic Head Pressure
- Dynamic head pressure calculations can be found here for 0.75" tubing.
- Dynamic head pressure calculations can be found here for 0.5" tubing.
Possible pumps considered can be found here.
In order to identify the best pump for the product a few calculations needed to be considered; these were fluid flow rate, NPSHr, NPSHA and total dynamic head loss.
After some research it was found that a majority of keg washers functioned with flow rate of 10-20GPM, therefore, the assumption was made of 20GPM. Since the pipe will be connected to two others it would separate the flow rate to 10GPM at each pipe.
Additionally a calculation for total head loss was made using the following equation:
HL = 0.2083 X (100/C)1.85 X (Q1.85/D4.8655)
HL = Head loss
C = Correction factor to account for pipe roughness
Q = Liquid flow rate in GPM
D = Inside pipe diameter
The inside pipe diameter chosen was 0.75. The result was a total head loss 24.5 ft liq. The NPSHA found was 28 ft liq. The NPSHr found was 24 ft liq. To support the calculations HyrdroFLOW, a software conducive to simulating head loss, was utilized. The anticipated model was built. From this the calculations were confirmed.
Using the calculations it was concluded that the most applicable pump for the project would be AMT pump 368A-98 using the figure below.
Drawings, Schematics, Flow Charts, SimulationsFor pdf file click here. For pdf file click here.
For a schematic of the PLC IO click here.
Bill of Material (B.O.M.)
Initial Prototype B.O.M.
The Bill of Materials regarding the initial prototype design can be located here. This version includes all materials needed to perform the initial manual testing that needs to be performed before moving onto the full-automation model.
Automated Keg Washer B.O.M.
The Bill of Materials regarding the final design can be accessed here. This version includes all materials needed for the final design from this point in time. It is anticipated that there will be adjustments as the group moves forward with testing.
PurposeIn order to outline the subsystems that need to be tested and the plans for doing so, a revision-conducive form was developed. This will also allow for team to maintain the proper documentation of results and analysis. The current document can be accessed here and will be updated as testing is planned and performed.
ContentsThis document describes the plan for testing the Keg Washer Prototype. This test plan supports the following objectives:
- Identify existing project information and the subsystems that should be tested.
- List the recommended test requirements.
- Recommend and describe the testing strategies to be employed.
- Identify the required resources and provide an estimate of the test efforts.
- List the deliverable elements of the test activities.
Design and Flowcharts
All block diagrams have been updated to account for detailed gained through purchasing decisions, feasibility analysis etc.For pdf file click here. For pdf file click here. For pdf file click here.
Since the Systems Level Review, no risks have been encountered, nor have any been reduced in likelihood or severity. However, a few more have been identified as potential threats to the project.
To access the most recent revision of the Risk Assessment document click here. Points 14 - 16 are the new risks, and all highlighted should be addressed in the Preliminary Design Review.
Plans for next phase
From this point forward, the team will continue to proceed with prototyping. The initial purchases will be made in order to begin the building and testing of the design.
The Project Plan template below has been updated to reflect the current state of the project with some additional tasks included. To access the most recent revision of document click here.