vacuum tube collector Heat pipe type vacuum tube collector is a new solar energy collection hot installment. Outer Tankwhite pearlescent platethickness: δ=0.32mmInner Tankaluminum alloy; preservative treatmentInsulationpolyurethane foaming; thickness: δ=5mmDimensionΦ47:1640/280/180mmΦ58:1830/280/180mmHeating surface areaΦ47 /2.46m2; Φ58/3.29m2Distance between each two tubes80mmWeightΦ47 /10.4kg; Φ58/13.2kgCapacityΦ47 /7L; Φ58/7.25LNOS of evacuated tubes20 piecesMax. Working Pressure10 KGMax. stagnation temperature250280               Allglass collector tubeMaterialborosilicate glass 3.3Dimension47/37/1.6/1500;  58/47/1.6/1800mmColorblueSelective absorber coatingcopper/stainless steel/aluminumVacuum degreeP≤5.0×10-3(Pa)        Heat pipe type--Compared to ordinary vacuum pipe heater, because of the use of heater pipe technology, this type of heater has advantages as follows:1).The calorific capacity is small in collection heat pipe, enhanced the collector output energy relatively2).The system can bear higher working pressure3).Anti-frozen: when theres no water in the vacuum tubes in the freezing winter, the pipe wont easily break.4).No deposition dirt5).The collector loss of heat is small

solar energy project (double vaccum tube)