Submitted: Jul 6, 2008 - Enjoyed your article on solar power in last Wednesday's edition. Unfortunately for most of us poor folks however, these systems are financially out of our reach. A cheap and simple solution is to suspend black ABS (acrylonitrile butadiene styrene) pipe in your attic -- which is 100 degrees or better this time of year -- and allow the water in the pipe to absorb this free heat. A few bypass valves…