Task 5. Christopher Mack Zack Kaldy MET 330 Fluid Mechanics November 8, Purpose

Transcription

1 Purpose Task 5 Christopher Mack Zack Kaldy MET 330 Fluid Mechanics November 8, 2015 For the fifth task of this project we are asked to specify the layout of the piping system, the material type and sizes of all pipes, and the lengths required each pipe. Drawings & Diagrams Sources Class Textbook Design Considerations The exit of the truck/entrance of the first pipe segment is located four feet above ground level. The first pipe segment is run four feet underground then hits a 90 elbow and continues until it reaches the clean storage holding tank. The exit for the last pipe segment into the truck is located about thirteen feet above ground level. Data & Variables Branch I flow rate = ft^3/s Branch II flow rate = ft^3/s Branch III flow rate = ft^3/s Branch IV flow rate = ft^3/s Velocity Criterion = 9.48 ft/s Kinematic viscosity = 2.505*10^-5 ft^2/s Materials Commercial Steel Procedure Calculations..

2 Christopher Mack Zack Kaldy MET 330 Fluid Mechanics November 8, 2015 Summary Pipe material: Commercial Steel Pipe Lengths: Branch I: 578 ft. 10 in. Branch II: 60 ft. 1 in. Branch III: 440 ft. 7 in. Branch IV: 40 ft. Pipe Diameters: Branch I: ft. Branch II: ft. Branch III: ft. Branch IV: ft. Analysis If the exit nozzle on the train has a limited size, our flow rate then becomes limited as well which would inhibit the time it takes to fill Tank one. We created a spreadsheet that can calculate friction factors

3 Purpose Task 6 Christopher*Mack** Zack*Kaldy* MET*330*Fluid*Mechanics** November*8,*2015* The purpose of this task is to specify the number, types, material, and size of all valves, elbows, and fittings. Drawings & Diagrams Sources. Class Textbook Design Considerations The fluid is already held in the train tanker and will be released via a valve that is attached to the train. Gate valves were added before and after pumps for maintenance purposes. Data & Variables Gate valve resistance coefficient = 8*f_t 90 elbow resistance coefficient= 30*f_t Roughness of commercial steel = 1.5*10^-4 ft. Materials Commercial steel 90 elbows Gate valves Procedure Calculations Summary. We will be using 2 2½ in. NPS Gate valves (Branch II)

4 1 4 in. NPS Gate valve (Branch III) 2 3 in. NPS Gate valves (Branch IV) 2 8 in. NPS 90 elbows 1 2½ in. NPS 90 elbow 2 4 in. NPS 90 elbows 2 3 in. NPS 90 elbows Christopher*Mack** Zack*Kaldy* MET*330*Fluid*Mechanics** November*8,*2015* Analysis After applying Bernoulli's equation to our four series pipeline system, we were able to determine pipe sizes and pump head requirements. Using these pipe sizes we determined the size and amount of elbows, gate valves and fittings required. Since this was done with numerical analysis we will have to determine the best fitting pumps for our systems and depending on these pumps specifications our pipe sizes may change.

5 Purpose Task 7 Christopher Mack Zack Kaldy MET 330 Fluid Mechanics November 8, 2015 The purpose of task seven is to include the hydraulic analysis of all parts of the system, including energy losses due to friction and minor losses. Drawings & Diagrams Sources Class textbook Design Considerations We are considering energy losses due to pipe elbows, valves and friction. Data & Variables Materials Procedure Calculations Summary Specific Gravity of fluid = 0.94 Viscosity/Vapor pressure = 1.5x that of water Velocity Criterion= 9.84 ft/s Three pumps Four Gate valves Six 90 elbows. Pipe Flow Rates: Branch I flow rate = ft^3/s Branch II flow rate = ft^3/s Branch III flow rate = ft^3/s

6 Branch IV flow rate = ft^3/s Christopher Mack Zack Kaldy MET 330 Fluid Mechanics November 8, 2015 Pipe Velocities: Branch I velocity = ft/s Branch II velocity = ft/s Branch III velocity = ft/s Branch IV velocity = ft/s Pipe Lengths: Branch I: 578 ft. 10 in. Branch II: 60 ft. 1 in. Branch III: 440 ft. 7 in. Branch IV: 40 ft. Pipe Diameters: Branch I: ft. Branch II: ft. Branch III: ft. Branch IV: ft. Pipe Friction Factors: Branch I: o F1 = o F_t = Branch II: o F2 = o F_t = Branch III: o F3 = o F_t = Branch IV: o F4 = o F_t = Analysis After applying Bernoulli s to our four pipeline systems, we were able to determine the latter values based off of whether the system was pumped or gravity driven. If the flow rate of any one system changes the pipe diameter will either increase or decrease.

7 Purpose Task 8 Christopher Mack Zack Kaldy MET 330 Fluid Mechanics November 8, 2015 Specify pipe wall thickness (schedule). Drawings & Diagrams Sources Class textbook Design Considerations Branch I has the highest pressure Data & Variables Design pressure = 8 psig Allowable stress = 15,000 psi Pipe outside diameter = in. Longitudinal joint quality factor = 0.85 Correction factor based on material type and temperature = 0.4 Materials Procedure Calculations Summary Pipe material: Schedule 40 Commercial Steel Calculated thickness = in. Therefore the Schedule 40 pipe thickness of in. will be more than enough.

8 Christopher Mack Zack Kaldy MET 330 Fluid Mechanics November 8, 2015 Analysis Because our highest pressure is seen in branch I we know Schedule 40 pipes will work throughout the plant.

9 Purpose: Task 9 Christopher Mack Zack Kaldy MET 330 Fluid Mechanics November 8, 2015 The purpose of task nine is to determine the requirements of each pump (i.e. pump head and flow rate), and determine how many pumps are needed. Drawings & Diagrams Sources Class textbook Design Considerations Two valves were placed on each pump in order to aid in the maintenance process. The pumps will be buried beside the tanks to avoid water hammer. Data & Variables Pipe material: Commercial Steel Pipe Lengths: Branch I: 578 ft. 10 in. Branch II: 60 ft. 1 in. Branch III: 440 ft. 7 in. Branch IV: 40 ft. Pipe Diameters: Branch I: ft. Branch II: ft. Branch III: ft. Branch IV: ft. Velocity Criterion = 9.84 ft/s Gate valve resistance coefficient = 8*f_t 90 elbow resistance coefficient= 30*f_t Roughness of commercial steel = 1.5*10^-4 ft. Materials Commercial steel 90 elbows

10 Gate valves Christopher Mack Zack Kaldy MET 330 Fluid Mechanics November 8, 2015 Procedure Calculations Summary Two pumps are needed. Pump I: 2 2½ in. NPS Gate valves (Branch II) Energy loss due to friction = ft. h_a = ft. Branch II flow rate = ft^3/s Pump II: 2 3 in. NPS Gate valves (Branch IV) Energy loss due to friction = 5.4 ft h_a = ft Branch IV flow rate = ft^3/s Analysis Since the pumps are buried next to the tanks at a distance of five feet, there may be water hammer issues. If these issues turn up we may have to change pipe lengths to compensate.

11

12

13

14

15

16

17

18

19

20

21