heat pipe solar water heater vacuum tube,3high vacuum tube

MAXSUN's Vacuum tube adopt dry absorb type selective coating with lower remittance,
it solved the problem of normal tube having not good curve of emittance, when the
temperature higher, the remittance higher, which reduce the efficiency of the tube.
Three Higher Point of this new tube
1. Higher Efficiency: The absorbance increased by 14% with remittance reduce by 30-40%
2. Higher Heat conduction: dry exposure temperature up to 270

our solar vacuum tube with:
1.fast thermal collecting efficiency
2.high heat resistance
3.high cold resistance...