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Solar Powered Water Desalination

Can solar power help desalinate sea/salt water in order to make it fresh water?
by

Anette Ruvalcaba

on 7 February 2012

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Transcript of Solar Powered Water Desalination

Hypothesis Results Research Solar Powered
Water Desalination San Francisco Budapest (cc) photo by Metro Centric on Flickr (cc) photo by Franco Folini on Flickr (cc) photo by jimmyharris on Flickr Stockholm (cc) photo by Metro Centric on Flickr Materials: Plastic Cling Wrap Plastic Straws 5 large 3L watter jugs &
20 1 pint water bottle Clay Utility Knife Salt Conductivity Meter We belive that the salt will evaporate in the sunlight and go into the large 3L water jug because the sun causes the water vapor to go through the straws with the salt into the water jug. we also believe that the water jug with the less amount of salt would have more dissolved units, because there wouldn't be alot of salt to dissolve. What is Desalination? the process that removes
salt and other minerals from
saline water What is a conductivity meter? measures the electrical conductivity in a solution, it also measures the total dissolved units Water that collects droplets on a cold surface when humid air is in contact with it. What is Condensation? Can solar power help desalinate sea/salt water
in order to make it fresh water? Experimental Question: Control Variables: The amount of salt poured in the water. The amount of time the devices
stay in the sunlight ( 8 hours ) The amount of water in the
1 pint water bottles Independent & Dependent Variable: Independent Variable: Dependent Variable: The amount of time the devices
were in the sunlight. The amount of salt that was left behind.
(the total dissolved units) Procedure: The results came out the way they did
because all the devices had differernt
amounts of salt in the water. We did this so we can have different types of results. In the end our hypothesis was correct. We predicted that the water jug with the least amount of salt would dissolve the most. We also believe our hypothesis was correct since it was the device that had the least amount of salt water. The new things that i have learned in this experiment is In this experiment i learned the that it is possible to make a man-made
solar powered water desalination device. I also learned new defintions such as: conductivity, and
what a conductivity meter is. By: Anette Ruvalcaba
Jose Castillo
Roberto Ventura This following graphs show the results of the 5 devices. Step 1: Before starting the project, review the research
Step 2: Open the water jug and empty the bottle into a large mixing bowl.
Step 3: With the utility knife cut four small holes that are big enough for a straw to fit through.
Step 4: Get four 1 pint water bottles and cut a hole on the cap.
Step 5: Insert the straw into the 1 pint bottle and the other to the empty jug.
Step 6: Use clay to hold the straw in place.
Step 7: In the bowl of water, pour 30g of salt or 1 tablespoon. MIx until the salt dissolves, then pour the water back in the jug
Step 8: Place the devices in the sunlight.
Step 9: Record your data.
Step 10: Use the conductivity meter to check the total dissolved units.
Pictures: In this picture we were measuring final results of device #1. This is a picture where the salt was mixed with the water
to create the sea water. This is the final result of device #1 once the salt water was inserted. This was the final day the devices were in the sunlight,
as you can see the clay that was surrounding the straws
had dried and spread through out the jug.
This is device #3 that contained 40g of salt, in the image the water jug
looks very empty because the final result was 36.2g. This means 3.8g of salt was evaporated from the saltwater. From all the things i discovered during this experiment, i really
enjoyed knowing how easy it is to make saltwater dissolve in 5 days.
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