If you walk into most professional engineering firms and ask them to design you a hydronic heating system RO water system, they will grab their manuals that show how to assemble a pressurized glycol loop.
Since it is too expensive to fill the solar storage tank with a glycol solution, the heat is transferred from the collector loop into the tank through a heat exchanger. The collector fluid goes through one side of the exchanger and the tank water goes through the other side. There are two pumps, one on each side of the exchanger.When such a system is installed, coin vents (can turn the screw with a dime) are installed at all the high points where air can accumulate and vapor lock RO water system. The startup procedure is to fill and pressurize the lines (maybe 15 psi) and go around to all the coin vents and burp the air out.
Since pressure goes up and down with temperature, a clever system was devised to maintain a nominal pressure in the loop. A tank, called an expansion tank, is installed in a tee in the line. The expansion tank has a rubber membrane running across the middle.
Unfortunately, RO water system hot water systems don't like to play by the rules. They are not well-behaved. Typical HVAC glycol systems do not go through the extreme temperatures that solar collectors do. A boiler heating loop may have a maximum temperature of 140-160ºF.
A solar hot water system, on the other hand, has the "boiler" sitting outside in the weather. It is always off at night where there is no sun. In the winter, the temperature may go down to -40ºF (Willmar, MN). Even in the mountains of NC, winter evening temperatures can go well below zero. A solar hot water system can have a maximum temperature swing as high as 260ºF (-40-220), or almost three times what a typical boiler system sees.
If you are interested in RO water system, please check our website at
https://www.qileegroup.com for details. Or contact us Tel: +86 021 5169 7580 Phone: +86 &+86 &+86 Email: qilee@qileegroup.com Contact person: Xia Miao Add: Room 412, Xianglu Building, No. 3009, Gudai Road, Minhang District, Shanghai, China
CITY，Country，2019-May-07 - / EPR Network / -