WTU Solar Hot Water System Video #2
Have you ever wondered exactly what’s going on inside the flat plate collectors of a solar hot water system? In this video I provide some insight into that question during our training session for NAVFAC. If you look inside a typical flat plate collector, you will see individual black plated copper fins. Manufacturers have different methods for […]
Solar Water Heating Systems – Definitions
Some of the words used in solar thermal system design may be confusing to the newcomer, so I thought I would go over some of them in this article. We hear the words, pressurized, non-pressurized, drainback, draindown, open loop, closed loop. I have heard professionals confuse some of these terms. Let’s go through them one […]
More Solar Thermal Lessons from Bethesda
Suppose for some crazy reason we had installed a pressurized glycol solar thermal system at the Warrior Transition Unit in Bethesda instead of a non-pressurized drainback one. Think about what that system is doing right now… 50 collectors just sitting there out in the bright summer sun. The system has been commissioned, meaning it’s operational, BUT […]
What’s the COP of a Solar Thermal System?
COP is a term that is used to refer to the performance of heat pumps. Coefficient Of Performance is the ratio of the energy to drive the compressor versus the energy transferred. For any solar thermal system there is a “COP” which refers to the energy gained vs the energy to run the system. More […]
Solar Hot Water Training from the NC Solar Center
I’ve been getting several inquires lately from people interested in learning more about hands-on training for solar water heating systems. Many local HVAC and plumbing contractors have realized that if they can learn a new trick (like solar hot water) they will grow their business in a new direction. Well, of course the primary purpose […]
Upcoming Solar Thermal Engineering Course
Hey Gang! I’m excited to announce that the North Carolina Solar Center is offering a professional-level one-day course on commercial solar hot water systems. Here are the details… “Designing Durable, Low-Maintenance Commercial Solar Thermal Systems” Friday, September 9, 2011 8:30am – 5:00pm Holiday Inn Express at NCSU 3741 Thistledown Drive Raleigh, NC 27606 Or Attend Remotely Using Elluminate […]
Evaluating Hot Water Meter Data from The Healing Place
In this video I analyze the data we recently collected from the hot water meter we installed at The Healing Place. This is actually the first of four data sets we will need to evaluate for the entire facility in the process of our design for their solar hot water system. Information from our datalogger […]
More Hot Water Metering at The Healing Place
In this video I show how we set up a non-invasive flow meter on another hot water line at The Healing Place of Wake County as part of our design process for a solar hot water system. The flow meter requires a straight run of pipe in order to properly collect data. In addition to […]
Dr. Ben Attends ASES 2011
The American Solar Energy Society (ASES) held its 40th annual National Solar Convention at the Raleigh Convention Center last week. The turn out was impressive and I had the pleasure of seeing many old friends and making some new ones. I also had the honor of being a panel member in two of the breakout […]
Design Advantages of Drainback Solar Hot Water Systems
Watch this video illustrating the design advantages inherent to drainback solar hot water systems. This is a follow-up to my three part video series on pressurized glycol solar water heating systems. If you haven’t seen that yet, you can click here to catch up. Unlike pressurized glycol systems, the drainback design requires none of the […]