Who can talk about the advantages and disadvantages of flat solar collectors and vacuum tube solar collectors?

1, safe and non-explosive, is the safest product among all balcony wall-mounted solar water heaters at present.

2. The installation of the flat solar collector is not restricted, and it can be installed on Nanyang terrace, wall, sunshade, window wall, etc. The water tank can be installed on the balcony, toilet or beside the air-conditioned aircraft seat, which is suitable for various architectural design requirements.

3. Because of its simple structure, convenient processing and easy mass production, the flat solar water heater has the characteristics of low manufacturing cost, low installation cost and long service life.

Disadvantage of flat solar collector

1, the flat solar collector has some problems, such as large heat loss and anti-freezing. "Tian Zi" flat solar collector uses antifreeze circularly, so there is no antifreeze problem and the heat loss is reduced to the minimum standard.

Advantages of vacuum tube solar collector

1, the heat loss of vacuum tube solar collector is relatively low.

Disadvantages of vacuum tube solar collector

1, vacuum tube solar collector is the problem of water circulation in winter when vacuum tube is frozen.

2. If the vacuum tube solar collector is used for a long time, it will produce scale according to the different water quality. The worse the water quality, the more serious the scale will be.

3. Due to the relatively high working temperature, the vacuum tube collector suddenly encounters cold and heat, which is easy to explode and rupture the tube.

Extended data:

Working principle of flat solar collector and vacuum tube solar collector

1, flat solar collector

Sunlight shines on the absorber coated with absorption layer through the transparent cover plate, and most of the solar radiation energy is absorbed by the absorber, converted into heat energy and transmitted to the working medium in the fluid channel. In this way, the cold working medium from the bottom inlet of the heat collector is heated by solar energy in the fluid channel, and the temperature gradually rises.

The heated heat medium with useful heat energy is discharged from the upper end of the collector and stored in the water storage tank for later use, which is a useful energy gain. At the same time, due to the rising temperature of the heat absorber, the heat is dissipated to the environment through the transparent cover plate and the shell, which constitutes various heat losses of the flat solar collector.

2. Vacuum tube solar collector

The heat-absorbing coating of the inner tube absorbs sunlight, heats the water in the inner tube, and exchanges with the water tank or the connecting box to improve the water temperature. As a kind of heat collector, it absorbs heat and dissipates heat at the same time, and there are only three ways of heat transfer: radiation, conduction and convection.

The three ways of heat dissipation and heat transfer of vacuum tube solar energy are very small, and the mercury coating on the inner tube prevents thermal radiation; The vacuum layer between the inner tube and the outer tube prevents heat conduction; As for convection heat dissipation, vacuum tube solar energy is almost zero. The thermal efficiency reaches 93.5%, which is 50-80% higher than that of flat solar energy.

References:

Baidu encyclopedia-flat solar collector

Baidu encyclopedia-vacuum tube solar collector