Gravity Fed System. Team Members: Chris Kulbago, Lauren Pahls, Ted Rakiewicz, Patrick O Connell, Sarah Salmon, James Brinkerhoff Group Number: 13631

Transcription

1 Gravity Fed System Team Members: Chris Kulbago, Lauren Pahls, Ted Rakiewicz, Patrick O Connell, Sarah Salmon, James Brinkerhoff Group Number: 13631

2 Table of Contents 1. Project Background 2. Important Tasks 3. Customer Needs 4. Engineering Specifications 5. Functional Decomposition 6. Design Concept Generation 7. Control Loops 8. Process Flow Diagrams 9. System Architecture 10. PUGH Diagram 11. Cart Proposal 12. Equipment Decomposition 13. Budget Analysis 14. Data Acquisition & Controller Options 15. Risk Assessment 16. Questions

3 Project Background Task Practically demonstrate process control in a lab environment using a gravity fed loop with a control valve. Customer RIT s Chemical Engineering Department Product Stakeholders Students who will use the machine, the Department, Dr. Sanchez, Dr. Richter, and staff who will maintain the machine. Collaboration Two other groups are designing similar process control machines whose aesthetic appearances must match ours.

4 Important Tasks Established roles within our group. Worked together to agree upon a code of ethics. Toured the lab to better understand customer needs. Researched donated equipment. Brainstormed different concept ideas. Iteratively arrived at our two final ideas. Produced diagrams to clearly present our ideas. Communicated throughout design process with customer. Collaborated with other two teams to make sure designs are consistent.

5 Customer Needs Machine Design Needs: An easily transportable/cleaned cart. A somewhat easy to disassemble cart. A way for students to manually manipulate flow A way for students to manipulate flow through Labview. A way to manually measure flow. A way to measure flow through Labview. Easily operated by 3 students. A safely operating machine. Interface of machine with Labview. A way to demonstrate each part of the PID equation. A way to demonstrate noise in sensors. A way to demonstrate the time lag. Minimal use of water and electricity.

6 Customer Needs Student Learning Needs: A lab manual that guides students through lab in a way that engenders learning. Questions for the post lab report that test student's understanding of process control. Lab manual that focuses on PID, noise, filtration, data modeling, disturbances, and/or hysteresis.

7 Engineering Specifications Line

8 Engineering Specs Pressure

9 Functional Decomposition

10 Design Concept Generation Gravity Fed-This was our first idea and our most basic and literal approach. Attach a large tank to a base connected to ceiling and change height to show different flow rates. Line Fed-Simulate height by controlling flow from a line and applying a pressure that corresponds with a given height. Pressure Tank-Simulate height by controlling the pressure of the feed from a pressure tank. Based on our group s analysis, we made the line fed system our first choice and the pressure tank as our second choice.

11 Control Loop Line Fed

12 Control Loop Pressure System

13 Gravity System Architecture RSP Or Analog Out Recycle Pump Gravity Feed Hand Valve Control Valve Micromotion Flow Meter Waste Flow Controller Flow Transmitter

14 Gravity Process Flow Diagram

15 Pressure System Architecture RSP Or Analog Out Recycle Pump Pressure Regulator Pressure Vessel Hand Valve Control Valve Micromotion Flow Meter Waste Flow Transmitter Pressure Transmitter Pressure Controller Simulation Setpoint Flow Controller Valve Position Setpoint

16 Pressure Process Flow Diagram

17 Line Fed System Architecture Water Line Hand Valve Control Valve Control Valve Micromotion Flow Meter Waste Pressure Transmitter Pressure Controller Flow Controller Flow Transmitter Simulation Setpoint Valve Position Setpoint

18 Line Fed Process Flow Diagram

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20 Cart Initial Proposal

21 Cart Layout

22 Line Cart Layout

23 Pressure Cart Layout

24 Equipment Decomposition Broke into four subsystems 1. Water Supply 2. Flow Control 3. Cart 4. Recycle Loop

25 Equipment Decomposition Water Supply

26 Equipment Decomposition Flow Control

27 Equipment Decomposition Cart System

28 Equipment Decomposition Recycle Loop

29 Budget Analysis

30 Data Acquisition & Controller Options Three choices 1. Use LabVIEW as the controller and the microcontroller as the ADC (Analog to Digital Converter). 2. Use the microcontroller as the ADC and utilize the donated Honeywell Controller. 3. Use the National Instruments Data Acquisition and the Honeywell Controller.

31 Risk Assessment

32 Risk Assessment Cont. Likelihood scale Severity scale 1 This cause is unlikely to happen 1 The impact on the project is very minor. We will still meet deliverables on time and within budget, but it will cause extra work 2 This cause could conceivably happen 2 The impact on the project is noticeable. We will deliver reduced functionality, go over budget, or fail to meet some of our Engineering Specifications. 3 This cause is very likely to happen 3 The impact on the project is severe. We will not be able to deliver, or what we deliver will not meet the customer's needs. Importance Score (Likelihood x Severity) use this to guide your preference for a risk management strategy Prevent Action will be taken to prevent the cause(s) from occurring in the first place. Reduce Action will be taken to reduce the likelihood of the cause and/or the severity of the effect on the project, should the cause occur Transfer Action will be taken to transfer the risk to something else. Insurance is an example of this. You purchase an insurance policy that contractually binds an insurance company to pay for your loss in the event of accident. This transfers the financial consequences of the accident to someone else. Your car is still a wreck, of course. Accept Low importance risks may not justify any action at all. If they happen, you simply accept the consequences.

33 Questions?