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How do vacuum tube solar water heaters work?

Views:2     Author:Site Editor     Publish Time: 2019-12-08      Origin:Site

The vacuum tube solar water heater is a new type of solar water heater, and it is also the most efficient and promising solar water heater. The most important feature of this type of water heater is the installation of the heat collecting portion of the sunlight in a vacuum glass tube. The degree of vacuum in the glass tube is about 1% Pa. So vacuum heat insulation can be used to effectively reduce heat loss to the outside of the heat pipe evaporation section. The boring temperature in the vacuum tube can reach 250 ° C, and will not be frozen at -25 ° C ambient temperature. It can be divided into two types: concentrating type and non-concentrating type. Next, let me introduce what is it, how it works, and what is its advantage.

 Content list of this article:

—  Brief introduction

—  Working principle

—  Advantage

—  Conclusion

 Brief introduction

The vacuum tube solar water heater adopts the glass and metal sealing technology to prevent the water from flowing inside the tube and is in a completely vacuum state. The copper-aluminum composite strip in the tube is connected with the water tank of the water heater to achieve the purpose of heat conduction. The outer diameter of the vacuum tube is ф100mm×2000mm. It is mainly composed of heat pipe, heat absorbing plate, glass tube, metal end cover and getter. It is widely used and is not subject to installation conditions. They can be installed and used for both bungalow users and high-rise buildings. Gradually become the main brand of the solar industry.

 Working principle

The vacuum tube type solar water heater is composed of a heat collecting tube, a water storage tank and a bracket. The heat collecting tube can directly convert the solar energy into heat energy. And the heat collecting tube utilizes the working principle of the hot water floating on the cold water sinking. So that the water can microcirculation, so that the purpose of heating is achieved. It can implement the top water working mode. The water tank can be jacketed or coiled.

The characteristic is that the water temperature in the process of using the solar water heater is high first and then declined, and all water temperatures are relatively easy to control. Use is not restricted by installation conditions and can be used for both bungalow users and high-rise building users. The glass and metal sealing technology is adopted to prevent the water from flowing under the full vacuum condition in the tube, and the copper-aluminum composite strip in the tube is connected with the water tank of the water heater to achieve the purpose of heat conduction.

 Advantage

The advantages of vacuum tube solar water heaters are:

j It is very safe, generally does not need to be plugged in, will not be affected by the non-operation when the power is off. And will not be affected by the electric shock caused by water leakage.

k It is very energy-saving and environmentally friendly. It basically does not need electric auxiliary heat. It basically relies on absorbing solar energy to heat the water and use it all day.

l It saves money and basically buys and installs for the first time. After that, there is no need to have a lot of overhead, and bad situations will be rare.

Some people may worry about how to use it when there is no sun on a cloudy day. You can buy a solar water heater with auxiliary electric heating function, which is mainly based on solar energy and supplemented by electric energy. This allows normal operation all year round throughout the year. And the efficiency is still relatively high when the ambient temperature is low.

 Conclusion

At present, vacuum tube solar water heaters can meet the requirements of energy saving, environmental protection, safety and economy. It is widely used and is not subject to installation conditions, both for bungalow users and high-rise building users.

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