 Allow sunlight in but trap heat in (greenhouse effect). 2 nd most important!  Glass or plexiglass, double paned with air space between works best 

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Presentation transcript:

 Allow sunlight in but trap heat in (greenhouse effect). 2 nd most important!  Glass or plexiglass, double paned with air space between works best  Plastic wrap is too thin

 Increase the surface area of the water so it will heat quickly

 Water should be in or around a conductor (for rapid heat transfer)  Metal is good

 The areas containing the water should be black to absorb heat

 Insulate outer areas of project to prevent heat transfer  Especially the Ground  Over insulation keeps light from entering and will DROP the temperature

 Use of reflectors or mirrors to concentrate light and heat onto water  Difficult to get the right angle due to moving sun  Least important

 Angle object 45 degrees to the SOUTHWEST  MOST IMPORTANT!!!!!!!!!!