1. Real-time Monitoring and Diagnostic Solution for an HVAC System ECE Team 169 Anthony Bellantoni (EE) Greg Carmichael (EngrPhys) Joe Grassi (EE) Sponsored by: Qualtech Systems Inc. Advisor: Professor John Chandy

2. Presentation Outline Project Goals Brief Explanation of Qualtech Systems, Inc. Overview of TEAMS Software HVAC Explanation Updated and Completed Model Overview of Detecting a Failure Project Timeline & Budget Project Limitations Lessons Learned

3. Project Goals Fix & Build Upon Previous Incomplete Senior Design Project - Update Diagnostic HVAC Model for ITEB Obtain real-time data from the building sensors - Develop Failure-Detection Code Combine model and code to detect for faults in real-time.

4. Qualtech Systems, Inc. Located in East Hartford, Connecticut (Founded in 1993) Provide advanced system health management, integrated diagnostics and telemaintenance Works on any system Helps improve equipment productivity TEAMS - Testability Engineering and Maintenance System

5. TEAMS Testability Engineering and Maintenance System Consists of Multiple Components Designer RDS o Remote Diagnostic Server RT o Real-Time Data Collection http://tomgpalmer.com/wp-content/uploads/legacy-images/FLASH%20LIGHT.jpg

6. TEAMS - Designer Used to create a model of a system, including components with their respective test points Can be used to model any complex system (e.g.-MRI, Car, Building, etc.)

7. TEAMS - RDS Online Server that connects all components of TEAMS software Decides Which Component is Most Likely Failing From the Designer –Provides Possible Solutions during Manual Maintenance Stores information gathered for future analyses

8. TEAMS - RT Provides Diagnostics in Real-Time Connects Developed Code with Generated Sensor Values to RDS –Allows for constant connection

9. What is HVAC? Heating Ventilation and Air Conditioning Processes Air in a Building, Vehicle, or Other Structure –Maximize Occupant(s) Comfort Of Enclosed Area Range from Central Air in Residential Homes to Complex Multi-Building Systems

10. ITE HVAC System Basement (Heat Exchanger) –Tunnel to COGEN plant Penthouse (Air Handler) VAV (Variable Air Volume) –One For Each Room –Measured on Every Floor at Every Point in System

11. ITE Penthouse Schematic

12. VAV Schematic

13. Procedure – ITEB Schematic

14. 3rd Floor Schematics

15. Procedure - Designer

16. Last Years Designer Model

17. Our Updated Designer Model

21. Procedure - RDS

22. RDS Photos

23. Procedure – RT

25. Procedure – Detecting Failures

26. Failure Detection Code Process 1) Extract sensor values from text file and determine whether or not a failure is occurring 2) Export results file into TEAMS-RT 3) TEAMS-RT combines test results with our model and determines possible failure points

27. How to Determine a Failure Set threshold value for maximum deviation from set point Cannot assume failure after one test Initiate a counter to determine number of tests in a row that fail If consecutive tests trend toward the set point, counter returns to 0 If deviation from the set point is less than the maximum allowed, counter returns to 0 If n tests in a row fail and do not approach set point, assume failure

28. Failure-Detection Method Temperature Humidity Extract sensor data from txt, determine if failure occurs, then store in either 'pass' or 'fail' txt file. Export results to TEAMS-RT Sensor 1 Sensor 2 Sensor n

29. Project Budget http://i.crn.com/images/free_cloud_400.jpg http://blog.outreach.com/wp-content/uploads/2011/09/Church-events-on-no- Budget.jpg http://www.rosemarierealty.com/wp- content/uploads/2012/03/dreamstime_xs_17999966-300x300.jpg http://static.seekingalpha.com/uploads/2009/3/4/saupload_mar04_09_bm.jpg

30. Project Timeline TaskSeptemberOctoberNovemberDecemberJanuaryFebruaryMarchApril Software access Gather & Review Schematics Research HVAC Update TEAMS Designer Model Learn C++ Syntax Develop Failure- Detection Code Merge Code With Model in SDK and RDS Test - Debug - Cleanup

31. Final Tasks Connect our Failure Results with TEAMS RT Connecting RT with RDS

32. Project Limitations Obtaining access to actual sensor values Maintenance cost/time value for each component o No access to maintenance costs held by UConn Facilities Restricted to remote server for TEAMS

33. Lessons Learned TEAMS is capable of modeling large systems –Difficult for beginners and requires expert knowledge to build HVAC systems are complex Prepare for setbacks –Information from facilities –Remote server issues

34. Questions ?