... , SOLAR PANELS, SOLAR COLLECTOR, SOLARCOLLECTORS, SOLAR COLLECTOR PANELS, EVACUATED TUBES SOLAR COLLECTORS, EVACUATEDTUBE SOLAR COLLECTOR, HOME SOLAR COLLECTOR, SOLAR THERMAL COLLECTORS, SOLARWATER COLLECTORS, SOLAR WATER COLLECTOR, HOT WATER SOLAR COLLECTORS, SOLARHOMES, SOLAR ... by the heat pipe rapidly.2.There is no water in the vacuum tube ,so the tube will not break ...