① The material should be borosilicate glass 3.3.

② The air drying performance parameter y ≥ 175m2. ℃/KW (when the solar irradiance G ≥ 800W/㎡ and the ambient temperature ta is between 8-30 ℃).

③ The required amount of solar radiation to increase the water temperature by 35 ℃ during sun exposure is ≤ 3.8MJ/m2 (G ≥ 800W/㎡, ambient temperature ta is 8-30 ℃).

④ The average heat loss coefficient UCT is ≤ 0.9W/(㎡ ℃).

⑤ The gas pressure in the vacuum interlayer is p ≤ 5 × 10-2Pa

⑥ Heat shock resistance should be able to withstand three cycles of alternating cold water below 25 ℃ and hot water above 90 ℃ without damage.

⑦ The heat resistance requirement should be able to withstand a pressure of 0.6MPa.

⑧ The hail resistance requirement should be no damage under hail attacks with a radial size not exceeding 25mm.

Several all glass vacuum solar collector tubes are arranged in a regular array and assembled into a solar collector with connecting tubes, tailstock, reflectors, etc; A split solar hot water system is composed of components such as circulation pipelines and water storage tanks. This is an all glass vacuum solar collector.

Can generate hot water and steam at 80-400 ° C