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

ITEMS JB JT JBR

tubeSL-I

SL-IISL-III SL-I+ heat pipe

Inner tank0.6mm

AISI3040.6mm AISI304 0.6mm AISI304

Reflector YES YES NO

Frame angle85,100,115,130L 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

JB JT

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

ITEMS JB-200 JT-150 JBR-150

Q, MJ/m2d 9.0 9.8 9.1

UL, 22W/m3K 11 9.8 12.8

Solar irradiance H is 17MJ/m2d

GB: tout≥ 45 , Q ≥7.5MJ/m℃ 2, UL≤ 22W/(m3K)

Served as reference only, different testing conditions (H, tA,Vwind) 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 <50m2 aperture area collector, we use JB systems.

Army bases in Jinzhou city Industrial use in Nantong city

清华阳光TSINGHUA SOLAR

Next Section

JR Series Solar Water Heater

THANK YOU！！！