How does EnerWorks Solar Hot Water Appliance handle the high summer temperature and solar radiation of a city like Phoenix Arizona?
Provided the proper system design steps are taken to deal with overheating (stagnation), EnerWorks believes that closed loop systems are best suited to all climates, from arctic to tropical. The EnerWorks residential system has the following design features to help it during stagnation with no user intervention required: Each EnerWorks residential collector has a patented temperature limiting device that vents out excess heat. This is done in a “passive”, mechanical way so that the device is not dependant on a power source; the vent works automatically even during a power outage. The expansion tank, its air chamber and system pressure are carefully sized so that a small amount of fluid boiling is allowed in the small diameter collector tubes. Fluid in the collector evaporates and the vapors push the rest of the fluid volume out of the collector. Because vapor has a very large specific volume and very small mass, in effect, only a very tiny amount of fluid is exposed to high temperature
