清华阳光 TSINGHUA SOLAR PRODUCTS INTRODUCTIONS Presented by jiaojiwen International Trade Dept. Aug. 31 ， 2005

清华阳光 TSINGHUA SOLAR Solar Water Heater Thermosyphon system --- JB, JT, JBR Section II

清华阳光 TSINGHUA SOLAR Thermosyphon system Part 1 Structure; Part 2 Operation principle; Part 3 Specifications; Part 4 Comparisons; Part 5 Thermal performance; Part 6 Characteristics; Part 7 Target customers. Thermosyphon System

清华阳光 TSINGHUA SOLAR Background Information 1993 First thermosyphon system; 1995 Support Himin and produce tubes mainly; 1997 Build Yangfang factory; 1998 Mass producing JB system; keep improving structures of JB system; 2004 Design and start marketing JT system; 2005 Design and start marketing JBR and MT system. Thermosyphon system

清华阳光 TSINGHUA SOLAR 1.1 Structures: Inner tank structure of all thermosyphon systems Part 1 Structure Note: Air vent has two kinds: upward, downward

清华阳光 TSINGHUA SOLAR 1.1 Structures: Outlook Part 1 Structure

清华阳光 TSINGHUA SOLAR 1.1 Structures: components illustration - cover (metallic) - silicon seal - data of each component Part 1 Structure

清华阳光 TSINGHUA SOLAR Part 2 Operation Principle natural convection phenomenon called “thermosyphon” for JB, JT, MT Hot water rising and pulling down cold water

清华阳光 TSINGHUA SOLAR Part 2 Operation Principle JBR system: heat pipe (condensing, vapor end)

清华阳光 TSINGHUA SOLAR Part 3 Specifications JB: 85L, 100L, 130L, 150L, 175L, 200L,300,400L. JT: 150L, 175L, 200L, 230, 260, 270, 300L; JBR: 130L, 150L, 175L, 200L; Volume per SL-I tube:1.25litres One SL-I-1500 tube powers 7litres water; Space between 2 tubes is 70 mm; Inlet/outlet connections:1/2” Diffuse plate reflector & CPC mirror (raw material, dust and efficiency); Snow & wind cause problem---elimination of reflector

清华阳光 TSINGHUA SOLAR Part 4 Comparisons ITEMSJBJTJBR tube SL-I SL-II SL-IIISL-I+ heat pipe Inner tank 0.6mm AISI mm AISI304 ReflectorYES NO Frame angle 85,100,115,130L angle: 45°, PJ(slope roof) 150, 175, 200L angle: 30°, 45°, PJ(slope roof) Components comparisions

清华阳光 TSINGHUA SOLAR Part 4 Comparisons JB vs JT JBJT

清华阳光 TSINGHUA SOLAR JB vs JT - tube volume 1.25litres vs 0.95litres; (low volume of larger diameter,58mm) - JT start-up fast, advantage in partly cloudy day; - tube numbers: JB150 vs JT150 21pcs vs 18pcs JB200 vs JT200 28pcs vs 24pcs - coating: - cost: JB<JT - JT has more heat gain under same irradiance day than JB; Part 4 Comparisons

清华阳光 TSINGHUA SOLAR Part 4 Comparisons JBR vs JB - tube: JBR Ø58mm, 1.6m - free of internal thermal shock; (supply cold water when tank runs out water in daytime) - JBR anti-freezing; (JB tube might freeze during one week’s continuous snow) - No drainage in event of tube breakage; - fast start-up; (low capacity + low boiling point of heat transfer fluid inside heat pipe) - Reflector; - Cost: JB<JBR; - JBR has slightly more heat gain under same irradiance day.

JB is going to be replaced by MT system at the end of 2005 MT:85L, 100L, 115L, 130L; JB vs MT: - Reflector; - Inner tank; thickness and strengthen the inner cylinder （滚金） - Cost: JB>MT; - JB has more heat gain under same irradiance day than MT. 清华阳光 TSINGHUA SOLAR Part 4 Comparisons

清华阳光 TSINGHUA SOLAR Part 5 Thermal Performance ITEMSJB-200JT-150JBR-150 Q, MJ/m2d UL, 22W/m 3 K Solar irradiance H is 17MJ/m 2 d GB: t out ≥ 45 ℃, Q ≥7.5MJ/m 2, UL≤ 22W/(m 3 K) Served as reference only, different testing conditions (H, t A,V wind ) leads to different results even for one same system. JBR vs JB: reflector factor

清华阳光 TSINGHUA SOLAR Part 6 Characteristics Advantages: - Simple structure, easy to install and operate. - Cheap & effective; - Good insulation; - Free of over-heating problem; - Possible for large system. Disadvantages: - Close-couple, visual image; - Non pressurized; - Cold water supply impossible when hot water is being used; - Avoid cold water supply during daytime, esp. when tank gets no water(except for JBR); - Drainage happens when one tube breaks (except for JBR);

清华阳光 TSINGHUA SOLAR Part 8 Large Project In China, when a large project requires <50m 2 aperture area collector, we use JB systems. Army bases in Jinzhou cityIndustrial use in Nantong city

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