1. By: Rheanna McKnight & Victoria Shao
Make Earth a Better Place
By: Rheanna McKnight
&
Victoria Shao

2. Active Solar Water Heating For Home Hot Water
Why is this technology used?
The sun is channeled to heat water (like in showers and washing machines).
This technology does not use fossil fuels which means greenhouse gasses are not being released.
It uses the suns natural energy.
It also is very cost effective.
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3. What difference does it make?
Since it reduces the greenhouse gasses it would also reduce the greenhouse effect. This would solve many of the problems such as the polar icecaps melting.
It also is very cost effective and lowers energy bills. During this economic recession this would help many people out. It can save a family approximately 230 dollars a year!
The technology would allow for a cleaner environment since it only uses the suns energy and nothing is burning to produce excess gasses.

4. Benefits of Solar Heating
SOLAR WATER HEATER: FREE energy from the Sun
STANDARD WATER HEATER: COSTLY gas or electric
Annual operating cost: $50
Annual operating cost: $500+
Storage Capacity: gal
Storage Capacity: gal
Life expectancy: years
Life expectancy: 8-12 years
Increases equity in your home
No added value to your home
25% return on your investment
No return on utility payments
Protection from future increases
At mercy of utilities/government
Hot water during blackouts!
No hot water during blackouts

5. How does it work? There are three types
The first is Direct Circulation. It uses pumps to circulate pressurized water through the collectors. They require electrical power for the protection to be affected.

6. How does it Work?
Indirect Circulation- A pump heat-transfer fluids through collectors. These heat exchangers transfer the heat from the fluid to the water. There are two types of indirect systems.
Antifreeze- The heat transfer fluid is a mixture with glycol concentration depending on the minimum temperature.
Drainback System- Uses pumps to circulate water through the collectors. The water in the collector loop drains into a reservoir tank when the pump stops.This works better in colder climates.

7. How Does it Work? Passive Solar Water Heater-
This relies on gravity and the tendency for water to naturally circulate as it is heated. They contain no electrical components so, they are usually more reliable, easier to maintain, and a longer work life.
It runs on the natural convection of warm water rising to circulate water through the collectors and into the tank. As the water heats it becomes lighter and naturally rises into the above tank. The cooler water flows to the bottom, inhancing circulation.

8. Setbacks… It costs more to install than a regular water heater.
It takes up a lot of space

9. Politics and Economics?
Its more expensive initially. It cost more to install than a regular water heater. Many people do not posses the money needed to buy the system even though it will pay its self off in under than 14 years.
$$$$$

10. So what are some negative effects?
It does use fossil fuels to install the system
Materials used in some solar systems can create health and safety hazards for those who come in contact with them
Example: Solar cells contain arsenic and cadmium.

11. Works Cited