Fathom Modeling of Sprinkler System

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Fathom Modeling of Sprinkler System

• Purdue University
• Department of Mechanical Engineering, IUPUI
• ME 414 Thermal Systems Design
• Team Members
• Natalie Ridao
• Sara Stirn
• Spring 2004

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Project Introduction

• Sprinkler System
• Objectives
• Minimum Time to Deliver 1 of Water
• Minimum Amount of Wasted Water
• Minimum Cost
• Minimum Electric Utility Cost
• Even Water Fall

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Executive Summary

• Water Flow Even
• Time to Deliver 1 Water - 1.06 hour
• Water Wasted - 8.72 of Water Used
• Cost 830.01
• Electric Utility Cost - 0.89 per Use

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Area to Cover
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Sprinkler Selection
Round Sprinkler Coverage Square
Sprinkler Coverage
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Sprinkler Selection

• Square Shooter Sprinkler
• Up to 40 x 40 square
• Up to 20 X 40 rectangle
• Up to 40 X 40 L-shape

www.squareshooter.com
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Sprinkler Layout

• 13 Total
• 4 40 x 40
• 3 10 x 40
• 1 L-shaped
• 1 36 x 40
• 1 35 x 40
• 1 20 x 40
• 1 18 x 40
• 1 12 x 35

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Flow Rates

• 40 x 40 Square (4)
• 17.00 GPM each
• 10 x 40 Rectangle (3)
• 4.25 GPM each
• L-shape (1200 ft2) (1)
• 12.75 GPM
• 36 x 40 Rectangle (1)
• 15.30 GPM

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Flow Rates

• 35 x 40 Rectangle (1)
• 14.875 GPM
• 20 x 40 Rectangle (1)
• 8.5 GPM
• 18 x 40 Rectangle (1)
• 7.65 GPM
• 12 x 35 Rectangle (1)
• 4.4625 GPM
• Total Flow Rate 144.2875 GPM

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Fathom Modeling
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Fathom Results
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Pump Selection

• Total Flow (from Fathom)
• 156.67 GPM
• Total Head
• 90 Ft.

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Pump Chosen

• Pacer Pump
• 5.5 HP Water Pump
• Up to 200 GPM
• Up to 125 Ft. Head
• Northern Tool Equipment
• Model SEB2ULE51C

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Bill of Materials (Piping)
Menards
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Total Costs

• Piping 205.67
• Pump 299.99
• Sprinklers
• 13 _at_ 24.95 324.35
• TOTAL COST 830.01

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Results

• Water Flow EVEN!
• Time to Deliver 1 Water - 1.06 hour
• Water Wasted 12.3825 GPM
• - 8.72 of Water Used
• Cost 830.01
• Electric Utility Cost - 0.89 per Use

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Matlab Modeling of Heat Exchanger
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Project Introduction

• 4 Engines 650 HP Each
• 1/3 of Energy Goes To Coolant
• Engine Coolant Ethylene Glycol
• 80 GPM Each Engine

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Project Objective

• Design Shell and Tube Heat Exchanger
• Cool Engine Coolant from 235 to 210F
• Use City Treated Water at 65F
• Minimize Shell Pressure Drop
• Minimize Tube Pressure Drop
• Minimize Weight

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Executive Summary

• Engine Coolant in Tubes
• QCALC 1200 kW
• Desired-to-Calculated Ratio 0.99
• Shell Pressure Drop 605 Pa
• Tube Pressure Drop 5875 Pa
• Weight 602 kg

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Specifications

• Shell and Tube Fluid Water
• Fouling Factors None
• Baffles None
• One Tube Pass
• One Shell Pass
• Shell and Tube Material
• Stainless Steel AISI 304

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Target

• Heat Transfer Rate 1185 kW

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Critical Parameters

• Tube Outer Diameter
• Shell Inner Diameter
• Tube Length
• Mass Flow Rate of Cooling Water
• Tube Pitch

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Main Effects Plot
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Counter or Parallel Flow?
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Minitab Optimization
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Final Critical Parameters

• Tube Outer Diameter
• Shell Inner Diameter
• Tube Length
• Mass Flow Rate of Cooling Water
• Specifications
• Counter Flow
• Rectangular Pitch

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Different Directions

• Engine Coolant in Shell
• Cooling Water in Tubes
• Engine Coolant in Tubes
• Cooling Water in Shell

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Optimization

• With Engine Coolant in Shell
• Tube Outer Diameter 12.7 mm
• Shell Inner Diameter 0.254 m
• Tube Length 5 m
• Shell Mass Flow Rate 18 kg/s

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Optimization Results

• With Engine Coolant in Shell
• QCALC 1177 kW
• Desired-to-Calculated Ratio 1.01
• Shell Pressure Drop 1539 Pa
• Tube Pressure Drop 9051 Pa
• Weight 599 kg

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Optimization

• With Engine Coolant in Tubes
• Tube Outer Diameter 12.7 mm
• Shell Inner Diameter 0.254 m
• Tube Length 5 m
• Shell Mass Flow Rate 12 kg/s

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Optimization Results

• With Engine Coolant in Tubes
• QCALC 1200 kW
• Desired-to-Calculated Ratio 0.99
• Shell Pressure Drop 605 Pa
• Tube Pressure Drop 5875 Pa
• Weight 602 kg

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Conclusion

• Engine Coolant in Tubes
• Satisfies Q
• Minimum Shell Pressure Drop
• Minimum Tube Pressure Drop
• Minimum Weight

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Lessons Learned

• Not Every Problem Has a Clear Definition
• Learn to Adapt
• Not Every Problem Has a Clear Solution
• May Not Be Able to Meet All Requirements
• Sacrifice One Requirement to Meet Another

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Questions