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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 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) Dan Esposito (HVAC Specialist) Electrical Engineer Jimmy Liang (Electrical Specialist) Team Members
Background Needs Assessment Concept Development & Feasibility Final Concept AHU System Components & Testing Electrical Components & Instrumentation Engineering Analysis Future Work Overview
Commissioning Retrocommissioning Reviews of existing system against design specifications Extends lifetime of components Analyzes efficiency for comparison Minimize energy waste Background
Understand the thermodynamic, mechanical and electrical aspects of an air handling unit Develop retrocommissioning plan Test procedures Instrumentation list Project Goals - Senior Design 1
Sponsor Needs Develop test checklist Test system Develop retrofit solutions Team Needs Apply engineering knowledge Gain work experience Needs Assessment
Scope Format of Documents Test points Instrumentation Concept Development
Feasibility Assessment • REST method • Scope • AHU • Format of Documents • Word Checklist • Excel for analysis • Test points • Instrumentation
Testing • Sensor verification • Test points • Economizer • Heating and Cooling Coils • Supply and Return Fans • Trends
Instrumentation • Digital Multimeter • Tachometer • Thermometer Probes • Anemometer • Digital Manometer • Wireless Laptop
Mass Balance Energy Balance Exergy Analysis First and Second Law Efficiencies Thermodynamic Analysis
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
Potential for energy use Steady state exergy balance Specific Flow Exergy (ef) Exergy
Economizer Analysis • Mass Balance • Dry air • Water • Energy Balance – check adiabatic assumption • 2nd Law Efficiency
Heating Coil • Energy Balance • 2nd Law Efficiency
Fan Performance • 1st Law Fan Efficiency • 2nd Law Efficiency
Run tests and collect data Analysis Develop software package Trend logging Retrofit solutions 2nd AHU? Future Work
Economizer Heating Coil and Cooling Coil Supply and Return Fans System Components
Economizer • Energy Recovery Device • Dampers • Exhaust Air • Outside Air • Mixed Air • Sensors
Heating and Cooling Coils • Maintain temperature of supply air
Supply and Return Fans • Maintain 1.5” W.C. static pressure in system to circulate air • Provide fresh, outside air throughout the building