Proyecto Cientifico

SOLAR STILLS
Ninety-seven percent of the earth's water mass lies in its
oceans.  Of the remaining 3 percent, 5/6 is brackish, leaving a
mere .5 percent as fresh water.   As a result, many peopledo not
have access to adequate and inexpensive supplies of potable
water.  This leads to population concentration around existing
water supplies, marginal health conditions, and a generally lowstandard of living.
 
Solar distillation uses the heat of the sun directly in a simple
piece of equipment to purify water.   The equipment, commonly
called a solar still, consists primarily of ashallow basin with
a transparent glass cover.  The sun heats the water in the basin,
causing evaporation.  Moisture rises, condenses on the cover and
runs down into a collection trough, leaving behindthe salts,
minerals, and most other impurities, including germs.
 
Although it can be rather expensive to build a solar still that
is both effective and long-lasting, it can produce purified waterat a reasonable cost if it is built, operated, and maintained
properly.
 
This paper focuses mainly on small-scale basin-type solar stills
as suppliers of potable water for families and othersmall users.
Of all the solar still designs developed thus far, the basin-type
continues to be the most economical.





















Branch of Science: Physics
Topic: WindPower
Title: Wind’ow’belts Rocks
Purpose: In this engineering science fair project we will develop and investigate wind power and wind turbine rotor designs to evaluate which produces the most energyal a certain wind speed and which one is less expensive.
Members:
1. Alexander Bernal 12ºP
2. Aris Dominguez 12ºP
3. Lizza Lopez 12ºS
4. Nichole Rios 12ºP
5. Rosel Rivera 12ºPMaterial
• Wood
• Hard Drive Voice Coil
• Magnets
• Video Tape
Procedure
1. Started by measuring the widest window in my house, then I cut a...