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 fanAttic VentilationResearch 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. TeamHome Efficiency & Analysis Team
Semester ProjectsSubstandard HousingBlower Door TestingGuide 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 in2
2x ELA of previous tests
Blower Door Testing
Blower door differential pressure calibration Previous test reading = .26 in2
Max diff pressure = .28 in2
Gauge precision = .01 in2
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 SystemUtilize hand held bar code scanner w/
keyboard wedgeBar 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 StatusThe Visual Basic interface to Access
database and the Bar Code system is complete and in the testing phase
Point of Sales Database
FutureDeployment of the Beta versionCollect feedback and track bugsFurther debugging based on feedback
Any Questions???
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