room heating system solar collector

Specifications: 1) Model no.: GTC-58S-Alu 2) Quantity of tubes: 18, 24, 30 3) Disassemble: yes 4) Technology: heat pipe with twin glass vacuum tube 5) Total length (m): 1.65/2.00/2.45 6) Total width (m): 1.9 7) Gross absorb area (m²): 3.14/3.80/4.66 8) Aperture area (m²): 2.52/3.36/4.20 9) Surface absorber (m²): 2.18/2.42/3.03 10) Reflector: non 11) Operation pressure (Bar): 8 12) Entry connector size: ½" male/copper tube 13) Diameter of condenser (mm): 24 14) Material of manifold: anodized aluminum, 2mm 15) Material of heat pipe and manifold head: TU1 copper 16) Insulation of manifold: polyurethane 17) Slot of thermic sensor: yes 18) Cold resistance: -30 19) Liquid capacity: 1.4/1.8/2.2 20) Total weight empty (kg): 39/47/65 21) Min. flow (L/m): 120 22) Typical flow (L/m): 150 23) Max. flow (L/m): 600 24) Stagnation temperature (°C): 300 25) EN 12975 (solar keymark): in course 26) Date: October 15 27) Efficiency: (n0 in %, k1 in W/m²K, k2in W/m²/K²); n0=0.77, k1=1.47, k2=0.0051 Tubes: 1) Hail resistance: ≤25 2) Diameter of tube (mm): 58 3) Glass quality: borosilicate, 3.3 (T=0.91) 4) Thickness (mm): 1.7 5) Vacuum degree (Pa): 3 x 10-3 6) Absorb rate: ≥0.94 7) Reflecting emission: <0.06 8) Material of coating: SS-C/CU solar collector, solar collector, solar collector, solar collector, solar collector, solar collector, solar collector, solar collector, solar collector, solar collector, solar collector, solar collector, solar collector