Simple solar heater
While long forays into the uses for photovoltaic power are fun and interesting, it is no secret
that heating water is by far the most cost effective way to use the sun?s energy. In dollar terms, pv
power generation does not have a leg to stand on when compared to the solar heating of water. Best of
all, heating water in this fashion can be accomplished by using materials we have sitting around our
workshops. even a garden hose sitting in the sun gets the water within it pretty hot on a spring day.
the system
two, 10 gallon passive water heating units that also act as storage tanks will be purchased from jade
mountain. I enjoy a somewhat long shower. this system will be used only from may through the first half
of september in the northeast portion of the united states. I presume that these tanks must be filled with
a hose in the morning and then heat up throughout the day. According to the specifications, water may be
heated to 110 fahrenheit when the outside temperature is 70 degrees. My guess is that the water in the
heaters will become even hotter.
A small pump will be connected using some type of tubing to the tanks and brought to the outdoor
shower we use. almost all of the hot water usage is from showering since we do not have a dishwasher.
The pump will probably be in the 4 gallon per minute range and i plan to power it from a small
photovoltaic panel and a battery.
The feeding problem
The simplest thing for us to attempt to do is build another shower that is connected to our solar tanks and
has a feed from the garden hose for cold water to be mixed with the hot. Before falling back on this plan
b, we are going to attempt to supplant the normal hot water feed to the outdoor shower with the solar hot
water feed. Every house?s plumbing contains water under pressure. By cutting the normal hot water
feed to the shower, we can hook up the solar hot water feed in its place. Thankfully, there is already a
valve to turn off the house?s hot water feed. All that needs to be done is to find a way to feed the solar
hot water into the shower?s hot water feed line.
The next step
Ideally, one would want to use the system to satisfy all of the house?s hot water requirements. This
requires linking the solar water heating system to the existing hot water tank which is pressurized. Heating water and then delivering this heated water the hot water tank
would reduce the amount of time the water tank would need to be running to get the water within it up to
a comfortable temperature.
from the open directory project |