1. Habitat for Humanity Final Presentation May 3, 2002

2. Introduction Team Structure  Solar Team Solar powered attic fan  H.E.A.T. Team Substandard Housing Blower Door Guide to Energy Efficient Construction  Database Team Point of Sales Database

3. The Solar Project Team Members:  Mike Schilz  Matt Selvey  Anshul Mangal  Vijay Murugesan

4. The Solar Project Purpose of the solar powered attic fan  Attic Ventilation  Research possible uses of solar energy in Habitat homes Main Components:  Solar Panel, Tracking System, Charge Controller, Battery, Fan

5. The Solar Project

6. The Solar Project: The Tracking System Tracks movement of sun across the sky  Light sensing diodes  Diodes are summed and compared Solar panel rotates to maximize energy production  Motor is initiated by differences in diodes to change panel orientation

7. The Solar Project: The Charge Controller Regulates charge going to battery  Switching device  LEDs to show battery charging/charged Safety device for battery  Prevents back current  Fuse for safety Acts as the “Brain” for the device  Conserving power  Equalizing switch

8. The Solar Project: The Mounting Device Mechanism to mount solar panel to a roof Major Concerns:  Adapting to roofs with different angles  Environmental concerns: weather and wildlife Solutions:  Aluminum construction  Adjustable mounting panels

9. The Solar Project: Semester Accomplishments Finished tracking system Finished charge controller Designed mounting mechanism Built prototype Did preliminary testing of solar panel output – Data Acquisition Card

10. The Solar Project: Plans for the Future Prototype will be mounted on the roof of Habitat For Humanity resale store for testing We will be evaluating the prototypes effectiveness by measuring the temperature of the attic We will also be evaluating the solar panels output during different points of the day

11. H.E.A.T. Team Home Efficiency & Analysis Team Semester Projects  Substandard Housing  Blower Door Testing  Guide to Energy Efficient Construction (GEEC)

12. Substandard Housing Motivation  Habitat for Humanity International’s 21 st Century Challenge. Goal  Identify substandard housing in Lafayette. Method  Determine houses to be evaluated.  Formulate a rating system for foundation, exterior walls & windows, landscaping, roofing and overall appearance.  Rate housing using detailed rating system.  Complete Prospect File for rated house.

13. Substandard Housing Lafayette area homes were previously evaluated on standardize scale.

14. Substandard Housing Detailed Rating System  Rating system for foundation, exterior walls & windows, landscaping and roofing.  Based off of Property Maintenance Code 1998

15. Substandard Housing

16. Next Semester  Use detailed rating system on houses in study area.  Complete Prospect File  Possible database project in maintenance of Prospect Files??

17. Blower Door Testing Goal  Measure Effective Leakage Area of house Purpose  Quantify tightness of house Method  Create partial vacuum in house with known airflow through fan, measure differential pressure Results  ELA = 66.4 in 2  House is tight enough to prevent excessive heat loss while allowing proper ventilation

18. Guide to Energy Efficient Construction Goal  Provide HFH affiliates with design, construction, and maintenance information that will reduce energy consumption of house Method  Include analyses from previous EPICS groups (Spring 1999 – present) and research on home construction and maintenance

19. Guide to Energy Efficient Construction

20. Point of Sales Database Purpose  Track inventory and donors in the Habitat resale store  Increase the organization and maintainability of the resale store  Potential addition to resale stores at other HFH locations

21. Point of Sales Database Bar Coding System  Utilize hand held bar code scanner w/ keyboard wedge  Bar code labeling software  Interface to database using Visual Basic

22. Point of Sales Database Design  The user will login into system  User information is stored in a separate Access database and can be changed in the login menu  Once logged in, users will be interfaced with the product database via Visual Basic  Users will be able to view, edit, delete, and add new product information Options available based on administrator privileges

23. Point of Sales Database  Users will also be able to search and display specific information about products  Each product will be labeled with a unique bar code Current Status  The Visual Basic interface to Access database and the Bar Code system is complete and in the testing phase

25. Point of Sales Database Future  Deployment of the Beta version  Collect feedback and track bugs  Further debugging based on feedback

26. Conclusion Major Accomplishments : Formed new team (H.E.A.T.) Initialized new projects (GEEC and substandard housing identification) Realized new vision of resale store database Completed solar powered attic fan

27. Any Questions???