Solar Water Heater Accessories Copper Heat Tube Solar Vacuum Tube

Solar Water Heater Accessories Copper Heat Tube Solar Vacuum Tube

Heat pipe solar vacuum tube technical data

1 Solar heat pipe vacuum tube product description

Heat pipes may seem like a new concept, but you probably use them every day and

don't even know. Laptops typically use small heat pipes to move heat away

CPU and air conditioning systems generally use heat pipes for heat conduction.

The solar heat pipe tube is the heart of the SANENG heat pipe solar collector, responsible for

Absorb sunlight and convert it into usable heat. In SANENG heat pipe solar collector

They are used to transfer heat from inside the vacuum tubes to the headers

Housed in an insulated manifold box.

2Sanneng solar heat pipe vacuum tube features

structure and operation

The SANENG heat pipe design consists of a long hollow copper tube with a large diameter

The condenser is welded on one end. A small amount of high-purity water and special additives

Added to the heat pipe, then heated to high temperature to expel the air inside

space, resulting in a vacuum, similar to the space between evacuated glass walls

tube.

In a heat pipe, the vacuum is not used to insulate the heat, but to change the behavior of the heat pipe

liquidin. At sea level water boils at 100oC/212oF but if you climb to the topThe boiling temperature of the mountain will be lower. This is due to air pressure difference and vacuum

It is a state of very low stress. Based on the principle that water boils at lower temperatures

With lower air pressure, we can achieve the same result by venting the heat pipe.

The boiling point of the heat pipe used in SANENG solar collector is only about 25oC, so

When the heat pipe heats above this temperature, the water begins to evaporate (turn into steam). This steam quickly rises to the top of the heat pipe and carries a lot of heat.

When heat is transferred to a cooler liquid that circulates through the solar collector header

At the top of the pipe, the vapor condenses into liquid (water) and returns to the bottom

hotAgain piped toRepeat cycle.

During the operation cycle of the heat pipe, the process of condensate (water) flowing to the bottom depends on

gravity, so heat pipes of this design do not function when horizontal, and have

Reduce output when vertical. SANENG recommends that the installation angle range is 20-80o

Ensure optimal solar collector performance.

In the vacuum space, the water in the heat pipe forms a small ball shape. When the heat pipe is in

Shake it up and you can hear the rattle of the water balloon inside. It's just water, but it sounds like water

A piece of hard metal.

While it sounds simple, it takes more than 20 manufacturing steps to create a high-quality heat pipe

Strict quality control.

Performance

The role of the heat pipe in the vacuum tube is to transfer heat quickly. heat

Therefore the pipe capacity must be greater than the maximum output of the vacuum tube to avoid

Bottleneck in the heat transfer chain. The average heat transfer capacity of SANENG heat pipes is >110 watts. The maximum heat output of SANENG vacuum tubes is about 65 watts.

SANENG heat pipes also feature bulk condensers that provide sufficient surface area for optimal heat transfer.

longevity

Material quality and cleanliness are extremely important in making a good heat pipe. The copper itself must also be of very high purity, containing only trace amounts of oxygen

and other impurities. If there are too many impurities in the copper, they will leach into the copper.

Over time, the vacuum creates bubbles at the top of the heat pipe. This has the following effect

Move the hottest point of the heatpipe down, away from the heat-transferring bulb

needs to happen.

SANENG produces its own heat pipes in an ISO9001:2008 certified factory and strictly controls

And carry out quality inspection on every link of the production process.

Each heat pipe is tested for heat transfer performance and exposed to a temperature of 300°C before use

To be approved for use, so the copper heat pipe is relatively soft. Heat pipe

Very stiff not so rigorously tested for quality, may form air

Over time, pockets on the top develop, greatly reducing heat transfer performance.

frost protection

Although the inside of the heat pipe is a vacuum, the boiling point has dropped to 25°C, but

The freezing point is still the same as sea level water at 0C. Since the heat pipe is located in

Vacuum insulated glass tube, night temperature as low as -40°C will not cause the heat pipe to heat up

freeze. The water used in the heat pipe will still freeze under special cold conditions, but it will freeze at a certain temperature.

The controlled way will not cause the copper pipe to expand.

3advantageheat pipe solar collector

Comparison with Evacuated Tube Solar Collectors

1. Efficient heat pipe;

2. High pressure antifreeze collector;

3. Closed loop heat loss is less;

4. No risk of thermal shock rupture;

5. No risk of cracking due to freezing of water.

6. One or more pipes are broken, and the system still does not drain;

Comparison with Flat Panel Solar Collectors

1. The collector has higher efficiency, vacuum insulation, and lower heat loss;

2. The heat pipe has super antifreeze performance in cold weather conditions;

3. One or more pipes are broken, and the system still does not drain;

4. The system components are more convenient to carry and install;

4 Services of Haining Sanneng Solar Water Heater Co., Ltd.

fast reaction: Your inquiry will be replied within 24 hours by email or online chat tool;

technical support:You have more than 10 years of experience in product advice, installation guidance, market analysis, etc. in Sanneng Solar.

OEM & ODM: We welcome solar collectors, storage tanks,

Installing frameworks and even some outsourced equipment;

sample inspection: Despite quality control during production, samples are selected and

Installation inspection before shipment;

MOQ: We provide sample sample manufacture for customer checking

SANENG quality and service;

delivery service: SANENG company provides the service of arranging the shipment of goods to foreign ports

Or the inland station, if necessary, handle cargo insurance, customs clearance, etc.;

Import certificate: SANENG provides certificates of origin CO, FORM A, FORM E,

FORM F, customs certification, etc.

5 notes

1. Delivery time: 7-15 working days after payment received

2. Payment method: T/T, L/C, Western Union

3. Warranty: 5 years for the whole machine, 15 years for the vacuum tube, and 1 year for accessories

4. Trade terms: FOB, CFR and CIF

5. Contact: Ms. He Mobile: (00)86-13511390503 Skype: eva201423