真空管太阳能集热器（Vacuum tube solar collector）.doc

真空管太阳能集热器（Vacuum tube solar collector） All glass evacuated tubular solar collector Definition A plurality of all glass evacuated solar heat collecting tubes are regularly arranged into an array, and a solar collector is assembled with a combined tube, a tail rack and a reflector. classification The arrangement can be divided into vertical single row (vacuum tube, solar heat pipe vertically arranged), horizontal single row (vacuum tube, solar heat pipe horizontal arrangement) and horizontal double row three categories. technical requirement 1) materials (1) borosilicate glass 3.3 shall be used as glass tube material. A and their physicochemical properties should be consistent with ISO3585:1998 borosilicate glass 3.3 QB/T2436 and the performance requirements for glass tube all glass vacuum tube solar collector, solar glass tube and transmission ratio of 0.89 (r = air quality 1.5, AM1.5, ISO9806-1:1994). B glass tube is not more than 1mm stone, shall not be dense, that is, within the scope of 10mmX10mm shall not be more than one, the whole pipe may not be more than five, stone around may not have a crack, more than 1mm of stone is not allowed to exist. C glass tube is not more than 1.5mm of the knot may not be concentrated, that is, within the scope of 10mmX10mm shall not be more than two; on the whole pipe, not more than 2.5mm of the node may not be more than five, greater than 2.5mm node tumor is not allowed to exist. (2) solar selective absorbing coatings for solar absorption ratio is greater than or equal to O.86 (AM1.5). (3) solar selective absorbing coating emission ratio H = 0.080 hemisphere (80 C, 5 C). (4) the getter shall comply with GB/T9505s Barium Flash Getters. 2) air drying performance parameters Solar irradiance G is larger than 800W/m, the environment temperature is 8 DEG TA and 30 DEG C, all glass vacuum tube solar collector with air as heat transfer medium, air drying temperature ts, air drying performance parameters of Y= (TS TA) /G, Y = 190m C /kW.