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???