CN2583568Y - Cellular heat pipe flat-plate solar heat collector - Google Patents

Abstract

The honeycomb heat pipe flat-plate solar heat collector of the utility model comprises a water tank, a metal box with an insulating layer, a transparent cover plate on the surface of the box, and a heat-absorbing plate fixed in the box. Arranged heat pipes and ribs arranged between adjacent heat pipes, a honeycomb interlayer is placed between the transparent cover plate and the heat-absorbing plate, there is a liquid-phase working fluid in the heat pipe, and one end of the heat pipe is inserted into the water tank. The heat collector has a simple structure and is easy to combine with buildings. Due to the application of heat pipe technology and honeycomb technology, its heat collection performance and thermal insulation performance are greatly improved. Compared with the all-glass vacuum tube solar water heater, the honeycomb heat tube solar collector has the advantages of not being afraid of freezing, being able to withstand pressure, fast start-up, high sensitivity, and fast heat transfer; it also has thermal diode effect, which can be reduced when the solar radiation is low. The heated liquid-phase working fluid dissipates heat to the surrounding environment, which greatly reduces heat loss at night; moreover, the water does not flow directly through the pipe, so long-term use does not cause scaling.

Description

Honeycomb heat pipe flat plate solar collector

Technical field

The utility model relates to a honeycomb heat pipe type flat solar heat collector.

Background technique

The vacuum tubes of the existing all-glass vacuum tube solar heat collectors are easily broken and cannot bear the pressure in the tap water pipeline system. The tubes are easy to explode when cold water is used in hot water, and the tubes are easy to freeze in cold winter. Scaling on the inner wall of the glass tube will reduce the heat collection efficiency. In addition, the vacuum tube cannot be made into the overall structure of the building plate and combined with the building.

Contents of invention

The purpose of this utility model is to overcome the deficiency of the all-glass vacuum tube type solar heat collector, and provide a kind of honeycomb heat pipe type flat solar heat collector.

The honeycomb heat pipe flat-plate solar collector includes a water tank, a metal box with an insulating layer, a transparent cover on the surface of the box, and a heat-absorbing plate fixed in the box. The heat-absorbing plate consists of several heat pipes and It consists of ribs arranged between adjacent heat pipes, a honeycomb interlayer is placed between the transparent cover plate and the heat absorbing plate, there is a liquid-phase working fluid in the heat pipe, and one end of the heat pipe is inserted into the water tank.

The utility model honeycomb heat pipe plate type solar heat collector has a simple structure and is easy to be combined with buildings. The most prominent advantage is that heat pipe technology and honeycomb technology are applied at the same time, so that its heat collection performance and heat preservation performance are greatly improved. Compared with the all-glass vacuum tube solar water heater, the honeycomb heat tube solar collector is not afraid of freezing, can withstand pressure, fast start, high sensitivity, and fast heat transfer; it also has thermal diode effect, which can be reduced when the solar radiation is low. The heated liquid-phase working fluid (working fluid) dissipates heat to the surrounding environment, which greatly reduces heat loss at night; moreover, water does not flow directly through the pipes, so long-term use does not cause scaling.

Description of drawings

Fig. 1 is the three-dimensional schematic diagram of the utility model honeycomb heat pipe plate type solar heat collector;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the sectional view of heat pipe;

Figure 4 is a schematic diagram of a honeycomb sandwich.

Detailed ways

With reference to Fig. 1, Fig. 2, honeycomb heat pipe flat-plate solar heat collector, comprises water tank 6, has the metal box body 1 of insulating layer, has transparent cover plate 2 on the box body surface, as glass, plexiglass or transparent plastic plate. A heat-absorbing plate is fixed inside the box, and the heat-absorbing plate is composed of several heat pipes 3 arranged in parallel at intervals and ribs 5 arranged between adjacent heat pipes, and a honeycomb interlayer 4 is placed between the transparent cover plate 2 and the heat-absorbing plate , the honeycomb interlayer can have various shapes, as shown in Figure 4, Figure 4 (a) is a rectangular channel honeycomb placed vertically; Figure 4 (b) is a rectangular channel honeycomb placed horizontally; Figure 4 (c) is a circular channel Film, Figure 4(d) is a bubble-type honeycomb, and Figure 4(e) is a triangular honeycomb.

The honeycomb itself does not have thermal insulation performance, but the honeycomb interlayer has good thermal insulation performance. The light transmittance of the honeycomb can reach more than 97% for parallel light, and for non-parallel light, the honeycomb wall can paste the single side of the non-perpendicular honeycomb with a panel, so the honeycomb has good light absorption performance. Because the honeycomb wall can block most of the sunlight, the multiple reflections of light are carried out on the honeycomb wall, so the light is almost completely absorbed by the honeycomb, and the light absorption performance of the honeycomb will be close to that of a black body. A honeycomb interlayer is added under the transparent cover. The honeycomb material is transparent and highly reflective to solar radiation, but opaque to infrared radiation. The honeycomb interlayer plays a role in the convection and radiation heat loss between the heat absorbing plate and the cover. Inhibition, thus can significantly improve the efficiency of the collector.

What the utility model adopted is a gravity heat pipe (shown in Figure 3), in which there is a liquid-phase working fluid (working medium), and the liquid-phase working fluid can be water, acetone or methanol, and one end of the heat pipe (the lower end of Figure 1) is Evaporation section, it is placed on the heat source, such as the sun to absorb heat, the other end of the heat pipe (the upper end of Figure 1) is the condensation section, inserted in the water tank 6, when working, the evaporation section of the heat pipe absorbs the heat of the sun, and the liquid phase working liquid absorbs The latent heat of vaporization evaporates, and the condensation section of the heat pipe is cooled by a cold source, such as water in a water tank, and the working liquid releases latent heat of vaporization. The condensate returns to the condensation section by its own gravity, and the working medium circulates by itself without external power. The work of the gravity heat pipe has a certain directionality, and the evaporating section must be placed under the condensing section, so that the condensate can return to the evaporating section by its own gravity. The heat pipe relies on the phase change of its internal working liquid to achieve heat transfer. It has good isothermal properties and a small axial temperature drop; it has the performance of a thermal diode and only allows heat to flow in one direction, but not to the opposite direction. direction flow. The shell of the heat pipe is compatible with the working liquid, and generally copper pipes, iron pipes or aluminum pipes can be selected.

Claims (4)

1. honeycomb heat-pipe flat-plate type solar thermal collector, it is characterized in that comprising water tank (6), metal cabinet (1) with heat-insulation layer, in tank surface transparent cover plate (2) is arranged, be fixed with absorber plate in the casing, heat pipe that this absorber plate is arranged in parallel by some spaces (3) and the fin (5) that is located between adjacent heat pipe are formed, and are equipped with honeycomb interlayer (4) between transparent cover plate (2) and absorber plate, the liquid phase working solution is arranged in heat pipe, and an end of heat pipe inserts in the water tank (6).

2. honeycomb heat pipe-type flat-plate solar collector according to claim 1 is characterized in that said heat pipe (3) is copper pipe, iron pipe or aluminum pipe.

3. honeycomb heat pipe-type flat-plate solar collector according to claim 1 is characterized in that the liquid phase working solution in the heat pipe is water, acetone or methyl alcohol.

4. honeycomb heat pipe-type flat-plate solar collector according to claim 1 is characterized in that honeycomb interlayer (4) is that glass or plastic sheeting are made.

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