Habitat for Humanity Design Review April 2, 2002

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 Sale Database

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

The Solar Project: The Tracking System Use Different Components  6 various light sensing diodes  Diodes Summed and compared  Relays tripped to run motors when center diodes are less than outside ones.

The Solar Project: The Charge Controller Use  Regulates charge going to battery  Safety device for battery What makes it work  Switching Device  Preventing back current  Fuse for safety  LEDs to show battery charging/charged  Conserving power  Equalizing switch

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

Substandard Housing Goal  Identify substandard housing in Lafayette area. Purpose  Identify future Habitat for Humanity building sites. Method  Using results from freshman class study, determine the evaluation area.  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.

Substandard Housing Evaluation area was determined by using ArcView GIS program. Area of concentration from Wabash to railroad tracks and Union to State Road 26.

Substandard Housing Status  Detailed rating system for foundation, exterior walls & windows, landscaping and roofing have been established. Next Step  Use detailed rating system on houses in study area.  Complete Prospect File  Possible database project in maintenance of Prospect Files??

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 ~ 86.1 in 2  2x ELA of previous tests

Blower Door Testing Blower door differential pressure calibration  Previous test reading=.26 in 2  Max diff pressure =.28 in 2  Gauge precision=.01 in 2 Proposed solution  More sensitive gauge

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

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

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

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

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

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

Any Questions???