You will apply concepts in heat convection and radiation in understanding and improving the design. The sun heats up water in a system of pipes. The hot water circulates in such a way that the lighter heated part flows to the top of the tank and can be used for, say bathing.
1/2″ pipes – 12m
1/2″ tees – 16
1/2″ elbows – 6 1/2″
Male-female connectors – 3
A bucket (or two)
Rubber tubes (for the washers)
Plastics glue
Black enamel paint
Transparent bags (for glazing)
Pipe cutters
Scissors
Knife
Clamps
Measuring tape
We assemble. The outlet and inlet of the piping system should be on one side. It should like like the one on the left.
The piping system on the right covers the same surface area. Which of the two do you think is better?
Now the tank. For this demonstration, we use a regular 20liter bucket. Gather the male-female connectors, make washers from the tubes (make sure the holes in the washers are much small than the 1/2″)
First, we cut holes at the approximate positions of the inlet and outlet. The holes should be slightly smaller than 1/2″. Should the inlet or the outlet be the higher hole? Put in the female connector as shown.
Almost there!
We now connect the piping system to the tank. Figure out where the tank will be placed and construct an appropirate system of pipes to connect the tank to the rest of the device. Set the piping system at some angle to the horizontal (why?). Here is an example:
We are basically done. A couple of things to do:
