GROUND SOURCE HEAT PUMP ANALYSIS FOR THE LOONGWOOD AT OAKMONT - - PowerPoint PPT Presentation

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GROUND SOURCE HEAT PUMP ANALYSIS FOR THE LOONGWOOD AT OAKMONT - - PowerPoint PPT Presentation

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LONGWOOD AT OAKMONT HEALTHCARE CENTER GROUND SOURCE HEAT PUMP ANALYSIS FOR THE LOONGWOOD AT OAKMONT HEALTHCARE CENTER TYLER LOBB AE SENIOR THESIS SPRING 2008 MECHANICAL OPTION THE PENNSYLVANIA STATE UNIVERSITY Presentation Outline

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SLIDE 1

GROUND SOURCE HEAT PUMP ANALYSIS FOR THE LOONGWOOD AT OAKMONT HEALTHCARE CENTER

TYLER LOBB AE SENIOR THESIS – SPRING 2008 MECHANICAL OPTION THE PENNSYLVANIA STATE UNIVERSITY

LONGWOOD AT OAKMONT HEALTHCARE CENTER

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SLIDE 2

TYLER LOBB – MECHANICAL OPTION

Presentation Outline

Project and Building Background Building Existing Conditions Mechanical System Redesign Goals and Objectives GSHP Building Energy Utilization Economic Analysis Electrical Breadth: Power System Changes Construction Breadth: GSHP Well Field Analysis Redesign Conclusions

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SLIDE 3

Project and Building Background

  • Location: 500 Route 909 Verona, PA 15147
  • Building Occupant: Presbyterian Senior Care
  • Occupancy/Function Type: Senior Care Facility
  • Size: 45,000 SF
  • Date of Construction: November 2007 – July 2008
  • Cost: Roughly 11 million dollars
  • Delivery Method: Design-Bid-Build

TYLER LOBB – MECHANICAL OPTION

Building Logistics

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SLIDE 4

Project and Building Background

  • Owner – Presbyterian Senior Care
  • General Contractor – Mistick Construction (www.mistickconstruction.com)
  • Architect – Reese, Lower, Patrick, and Scott, Ltd. (www.rlps.com)
  • MEP Engineer – Reese Engineering Inc. (www.reeseinc.com)
  • Structural Engineer – Zug and Associates
  • Civil Engineer – Gateway Engineering Inc. (www.gatewayengineering.net)
  • Landscape Architects – Victor – Wetzel Associates
  • Food Services – S.S. Kemp and Co. (www.sskemp.com)

TYLER LOBB – MECHANICAL OPTION

Project Team:

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SLIDE 5

Project and Building Background

  • Private/Semi-Private Resident Rooms
  • Offices
  • Public Gathering Spaces
  • Kitchens
  • Beauty Shop

TYLER LOBB – MECHANICAL OPTION

Healthcare Center

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SLIDE 6

TYLER LOBB – MECHANICAL OPTION

Presentation Outline

Project and Building Background Building Existing Conditions Mechanical System Redesign Goals and Objectives GSHP Building Energy Utilization Economic Analysis Electrical Breadth: Power System Changes Construction Breadth: GSHP Well Field Analysis Redesign Conclusions

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SLIDE 7

Building Existing Conditions

  • Supply Ventilation Air Throughout Building
  • “Room Neutral” - 79 F DB (Cooling) & 34 F DB (Heating)
  • Distributed to Water Source Heat Pumps
  • Fully Conditioned to Desired Set Point

TYLER LOBB – MECHANICAL OPTION

Energy Recovery Unit

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SLIDE 8

Building Existing Conditions

  • Located in Virtually Every Space
  • Perform Final Conditioning to Occupant Set Point
  • ½ - 10 Nominal Ton Units
  • Use Water Loop to Either Heat or Cool Air

TYLER LOBB – MECHANICAL OPTION

Water Source Heat Pump

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SLIDE 9

Building Existing Conditions

  • Closed Circuit, 325 Ton, Blow Through, Axial Fan
  • Cools Water Loop

TYLER LOBB – MECHANICAL OPTION

Cooling Tower Boilers

  • Gas-Fired Boilers Heat Water Loop
  • Three Boilers, One is Used as Backup

Pumps

  • Two Centrifugal Pumps Circulate Water Loop
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SLIDE 10

Building Existing Conditions

TYLER LOBB – MECHANICAL OPTION

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SLIDE 11

TYLER LOBB – MECHANICAL OPTION

Presentation Outline

Project and Building Background Building Existing Conditions Mechanical System Redesign Goals and Objectives GSHP Building Energy Utilization Economic Analysis Electrical Breadth: Power System Changes Construction Breadth: GSHP Well Field Analysis Redesign Conclusions

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SLIDE 12

Mechanical System Redesign

  • Increase Energy Efficiency
  • Fulfill Needs and Budget of Client
  • Compare WSHP System Versus GSHP System
  • Limit Negative Effects on Other Systems

TYLER LOBB – MECHANICAL OPTION

Goals and Objectives

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SLIDE 13

Mechanical System Redesign

  • Utilizes Earth’s Underground Temperature to Transfer Heat
  • Can Both Heat and Cool
  • Numerous Up-Front Hurdles
  • Potentially High Operating Cost Savings

TYLER LOBB – MECHANICAL OPTION

Ground Source Heat Pump System

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SLIDE 14

Mechanical System Redesign

TYLER LOBB – MECHANICAL OPTION

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SLIDE 15

Mechanical System Redesign

  • Mechanical Load Remains Same
  • Efficiency for Conditioning Load Increases
  • Decrease in Heating and Cooling Energy Usage
  • 23% Decrease in Energy Building Consumption

TYLER LOBB – MECHANICAL OPTION

Building Energy Utilization

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SLIDE 16

Mechanical System Redesign

TYLER LOBB – MECHANICAL OPTION

5000 10000 15000 20000 25000 30000 Heating Cooling

  • Misc. HVAC

Equipment Non-HVAC Electrical Energy Consumption (kBTU/year) 5000 10000 15000 20000 25000 30000 Heating Cooling

  • Misc. HVAC

Equipment Non-HVAC Electrical Energy Consumption (kBTU/year)

Annual Building Energy Utilization Redesigned Annual Building Energy Utilization

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SLIDE 17

Mechanical System Redesign

TYLER LOBB – MECHANICAL OPTION

Economic Analysis

Initial Cost Comparison More Than Twice as Expensive Up-Front

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SLIDE 18

Mechanical System Redesign

TYLER LOBB – MECHANICAL OPTION

Economic Analysis

Cost Description WSHP System Costs ($) GSHP System Costs ($) Utility Cost 1538400 1205400 Initial Cost 135500 325470

TOTAL

1673900 1530870

20 Year Cost Analysis

  • Roughly 10% Cheaper
  • Payback Period of 11 Years
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SLIDE 19

TYLER LOBB – MECHANICAL OPTION

Presentation Outline

Project and Building Background Building Existing Conditions Mechanical System Redesign Goals and Objectives GSHP Building Energy Utilization Economic Analysis Electrical Breadth: Power System Changes Construction Breadth: GSHP Well Field Analysis Redesign Conclusions

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SLIDE 20

Electrical Breadth Power System Changes

  • Electrical Driven Equipment Added and Removed
  • Panel Boards Resized
  • Feeders and Conduit Resized Accordingly
  • Voltage Drop Checked

TYLER LOBB – MECHANICAL OPTION

Mechanical System Power Redesign

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SLIDE 21

Electrical Breadth Power System Changes

TYLER LOBB – MECHANICAL OPTION

Cost Analysis of Power Changes

Conductor Savings $1,130 Conduit Savings $2,910 Total $4,040

Electrical Cost Savings Due to Mechanical Redesign

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SLIDE 22

TYLER LOBB – MECHANICAL OPTION

Presentation Outline

Project and Building Background Building Existing Conditions Mechanical System Redesign Goals and Objectives GSHP Building Energy Utilization Economic Analysis Electrical Breadth: Power System Changes Construction Breadth: GSHP Well Field Analysis Redesign Conclusions

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SLIDE 23

Construction Breadth GSHP Well Field Analysis

TYLER LOBB – MECHANICAL OPTION

Effects of Redesigned System

  • Impact on Construction Schedule
  • Physical Properties of Site
  • Size and Location of Well Field
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SLIDE 24

TYLER LOBB – MECHANICAL OPTION

Construction Breadth GSHP Well Field Analysis

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SLIDE 25

TYLER LOBB – MECHANICAL OPTION

Presentation Outline

Project and Building Background Building Existing Conditions Mechanical System Redesign Goals and Objectives GSHP Building Energy Utilization Economic Analysis Electrical Breadth: Power System Changes Construction Breadth: GSHP Well Field Analysis Redesign Conclusions

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SLIDE 26

TYLER LOBB – MECHANICAL OPTION

Redesign Conclusions

  • Higher Initial Costs
  • Annual Utility Savings
  • Reasonable Payback Period
  • Significant Savings Over 20 Years

Redesign Seems Beneficial Pending Owner

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SLIDE 27

TYLER LOBB – MECHANICAL OPTION

Acknowledgments

Thank You!

AE Department

  • Advisor Dr. Freihaut

Reese Engineering

  • James Hackman, P.E.
  • Tim Scharf, P.E.
  • Sam Snyder
  • Brian Walker, P.E.

AE Students

  • Doug Boswell
  • Steve Haines
  • Jason Witterman
  • Kristin Maruszewski
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SLIDE 28

TYLER LOBB – MECHANICAL OPTION

Questions?