Transcript Habitat for Humanity

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


Purpose


Identify substandard housing in Lafayette area.
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


Purpose


Measure Effective Leakage Area of house
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
Max diff pressure
Gauge precision
Proposed solution

More sensitive gauge
= .26 in2
= .28 in2
= .01 in2
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???