... high efficient,stable performance, it is widely used solar heat exchangerWorking principle:There have three parts of the split pressurized ... circulate automatically.Then the heat-conducting liquid transfers heat to water by heat exchanger in the tank to heat the water.The characteristic ... coil:15m-20m each, diameter 12mm,thickness 1mm. 5.Heat pipe:Ati-freeze:-35C6.Capacity:100L,150L,200L,250L,300L ...