Heat pipe solar collector
1. Borosilicate glass according to ISO3585: 1991;Transmittance of borosilicate glass: 0.92. Absorbance of solar selectiveabsorptive coating: 0.94; Hemispherical emittance: 0.08; Getter according toGB/T9505-1998.
2. Start-up temperature:No more than 25.
3. Start-up time: Nolonger than 2 minutes under normal sunshine.
4. Low temperature resistance: No breaks at-30.
5. Heat impact resistance: Nodamage after over 3 time's alternative impact of cold water below 25 and hotwater over 90.
6. Pressure resistance:Can with stand 0.6Mpa.
7. Hailresistance: No damage by the impact of 25mm diameter hail