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RETROCOMMISSIONING AIR HANDLING SYSTEMS The Golisano College of Computing and

RETROCOMMISSIONING AIR HANDLING SYSTEMS The Golisano College of Computing and Information Sciences, Building 70 Preliminary Design Presentation. Project 05306. February 18th 2005. Mechanical Engineers Erin Colquitt (Team Leader) Joe DiSanto (Chief Engineer) Jason Bolton (HVAC Specialist)

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RETROCOMMISSIONING AIR HANDLING SYSTEMS The Golisano College of Computing and

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  1. RETROCOMMISSIONING AIR HANDLING SYSTEMS The Golisano College of Computing and Information Sciences, Building 70 Preliminary Design Presentation Project 05306 February 18th 2005

  2. Mechanical Engineers Erin Colquitt (Team Leader) Joe DiSanto (Chief Engineer) Jason Bolton (HVAC Specialist) Dan Esposito (HVAC Specialist) Electrical Engineer Jimmy Liang (Electrical Specialist) Team Members

  3. Background Needs Assessment Concept Development & Feasibility Final Concept AHU System Components & Testing Electrical Components & Instrumentation Engineering Analysis Future Work Overview

  4. Commissioning Retrocommissioning Reviews of existing system against design specifications Extends lifetime of components Analyzes efficiency for comparison Minimize energy waste Background

  5. Understand the thermodynamic, mechanical and electrical aspects of an air handling unit Develop retrocommissioning plan Test procedures Instrumentation list Project Goals - Senior Design 1

  6. Sponsor Needs Develop test checklist Test system Develop retrofit solutions Team Needs Apply engineering knowledge Gain work experience Needs Assessment

  7. Scope Format of Documents Test points Instrumentation Concept Development

  8. Feasibility Assessment • REST method • Scope • AHU • Format of Documents • Word Checklist • Excel for analysis • Test points • Instrumentation

  9. Testing • Sensor verification • Test points • Economizer • Heating and Cooling Coils • Supply and Return Fans • Trends

  10. Sample Test

  11. Instrumentation • Digital Multimeter • Tachometer • Thermometer Probes • Anemometer • Digital Manometer • Wireless Laptop

  12. Mass Balance Energy Balance Exergy Analysis First and Second Law Efficiencies Thermodynamic Analysis

  13. Control Volume is around the AHU Mass flow in and out of CV Cold water Hot water Outside air Exhaust air Supply air Work into fans Steady State Incompressible flow No heat transfer out of CV Ignore potential and kinetic energy Assumptions

  14. Potential for energy use Steady state exergy balance Specific Flow Exergy (ef) Exergy

  15. Economizer

  16. Economizer Analysis • Mass Balance • Dry air • Water • Energy Balance – check adiabatic assumption • 2nd Law Efficiency

  17. Heating Coil • Energy Balance • 2nd Law Efficiency

  18. Fan Performance • 1st Law Fan Efficiency • 2nd Law Efficiency

  19. Overall System

  20. Run tests and collect data Analysis Develop software package Trend logging Retrofit solutions 2nd AHU? Future Work

  21. Feedback/Questions ?

  22. Economizer Heating Coil and Cooling Coil Supply and Return Fans System Components

  23. Economizer • Energy Recovery Device • Dampers • Exhaust Air • Outside Air • Mixed Air • Sensors

  24. Heating and Cooling Coils • Maintain temperature of supply air

  25. Supply and Return Fans • Maintain 1.5” W.C. static pressure in system to circulate air • Provide fresh, outside air throughout the building

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