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Internal recycling heat-collecting flat plate solar water heater

A solar water heater and internal circulation technology, which is applied to solar collectors, solar thermal energy, solar thermal power generation, etc., can solve the problems of poor use effect, large heat dissipation of hot water, and untimely heat transfer, and is conducive to popularization and promotion. , The effect of good airtight thermal insulation performance and improved heat absorption area

Inactive Publication Date: 2017-09-15
WUXI INST OF ARTS & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the vacuum heat-absorbing tube has better solved the problem of outward heat dissipation during the heat-absorbing process, the heat-absorbing layer is limited to the outer surface of the inner tube that is thinner, and the part that is irradiated by sunlight is the effective heat-absorbing surface. Considering The thickness of the vacuum layer, the installation distance of the vacuum heat-absorbing tubes, and the effective solar energy absorption area in the installation structure area of ​​the solar water heater generally account for about 50%, which seriously restricts the heat absorption efficiency of the solar water heater. When the sunlight is not enough When it is strong, especially in spring, autumn and winter, solar water heaters are not enough to absorb heat, and the heated water temperature often cannot meet people's daily needs.
Although the existing flat-panel solar water heaters have improved the effective heat-absorbing area, they do not have an insulated bucket, so the absorbed heat cannot be effectively collected and stored. The hot water dissipates heat in the heating water tank, especially at night. poor
There are also flat-panel solar water heaters that store hot water in thermal insulation buckets. A circulating pump is used to complete the circulation of cold and hot water between the heat collecting plate and the thermal insulation bucket. If the heat transfer is not timely, it will consume electricity, which is costly and ineffective.
Moreover, the tablet dissipates heat quickly at night, which is not conducive to heat storage

Method used

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  • Internal recycling heat-collecting flat plate solar water heater
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  • Internal recycling heat-collecting flat plate solar water heater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, a flat plate solar water heater with internal circulation heat collection according to the present invention includes a high light transmittance glass plate 1, an aluminum alloy plate 2 coated with a heat absorbing layer and an aluminum alloy frame 3 equipped with a desiccant. The three are glued into a closed hollow heat-absorbing plate. The hollow heat absorbing plate is used as the cover plate and the water tank 4 is sealed and installed to form a flat solar heat absorber. Then between the flat solar heat absorber and the box shell 6, the foaming heat insulating material 5 is filled. Two connecting holes are arranged on the upper side of the flat water tank close to the heat absorbing plate.

[0028] The flat water tank is rectangular, and the material is plastic, and the size is 1000mm×1500mm×30mm. The heat preservation adopts integral foam heat preservation, and the heat preservation layer of the flat water tank is 20mm thick.

[0029]...

Embodiment 2

[0033]It is basically the same as Example 1, except that the heat-absorbing plate is coated with a 2.0mm stainless steel plate, the flat water tank is rectangular, the material is aluminum alloy, the size is 1500mm×2000mm×50mm, the thickness of the insulation layer is 50mm, and the surface of the insulation layer is The load-bearing shell is made of aluminum alloy; the heat-absorbing plate, the aluminum alloy square groove frame, and the high-transmittance plastic plate are glued into a closed hollow heat-absorbing plate. The high-transmittance glass plate is the same size as the box shell, and the thickness is 5.0mmmm , 2.0cm away from the heat-absorbing coating; there are 4 connecting holes on the upper side of the flat sink close to the heat-absorbing plate. A heat preservation cover that can be folded and zoomed is installed on the outside of the light-transmitting plate. One side of the heat-insulating cover is a fixed end, which is fixed on one edge of the light-transmitt...

Embodiment 3

[0035] It is basically the same as Example 2, except that the heat-absorbing plate is coated with a 4.5mm glass plate, the flat water tank is rectangular, the material is stainless steel, the size is 1200mm×1800mm×40mm, the thickness of the insulation layer is 40mm, and the outer surface of the insulation layer is made of stainless steel. The load-bearing shell is made of stainless steel; the heat-absorbing plate, the aluminum alloy square groove frame, and the high-transmittance glass plate are glued into a closed hollow heat-absorbing plate. The thickness is 4.5mm, and the distance from the heat-absorbing coating is 2.0cm; there are 4 connection holes on the upper side of the flat sink near the heat-absorbing plate. One end of the connecting pipe is connected to the connecting hole on the side of the flat water tank, and the other end is connected to and penetrates into the heat preservation bucket about 10cm; one end of the diversion pipe is connected to the bottom of the fl...

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PUM

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Abstract

The invention discloses an internal recycling heat-collecting flat plate solar water heater. The internal recycling heat-collecting flat plate solar water heater comprises a heat-absorbing water tank, a connecting pipe, a flow guiding pipe and a heat insulating bucket, wherein the heat-absorbing water tank comprises a platy water channel and a heat-absorbing plate. The upper end of the platy water channel is covered with the heat-absorbing plate, and an airtight water tank body is formed; and a connecting hole is formed in the position, close to the heat-absorbing plate, of the side face of the platy water channel. One end of the connecting pipe is connected with the connecting hole of the side face of the platy water channel, and the other end of the connecting pipe is connected with and penetrates into the heat insulating bucket by about 10 cm. One end of the flow guiding pipe is connected with the bottom surface of the platy water channel, and the other end of the flow guiding pipe is connected with the bottom of the heat insulating bucket. A heating insulating layer is arranged on the outside of the platy water channel, and a box shell is made of plastics, aluminum alloy or stainless steel on the surface of the heating insulating layer. According to the internal recycling heat-collecting flat plate solar water heater, the effective heat absorbing area is increased by 40% or above, and more solar energy is absorbed; speed of solar energy converting into heat energy in water is higher, heat energy in water can be stored in the heat insulating bucket in time, and the airtight heat insulating property is better; and the structure is simple, manufacture is easy, production cost is lower, and popularization and promotion are facilitated.

Description

technical field [0001] The invention belongs to the field of solar water heaters, in particular to an inner circulation heat collecting flat solar water heater. Background technique [0002] At present, solar water heaters rely on solar vacuum heat-absorbing tubes to absorb solar heat to heat the water in the tubes, and the water heated in the tubes rises due to buoyancy and flows into the insulation barrel, so that the temperature of the water in the insulation barrel is raised to become hot water for people to use. Since solar water heaters rely on multiple slender vacuum heat-absorbing tubes to absorb solar energy, the vacuum heat-absorbing tubes are composed of an inner tube and an outer tube, and the outer surface of the inner tube is coated with a heat-absorbing coating. The inner tube and the water in the inner tube are heated, and the vacuum state is between the inner tube and the outer tube to reduce the absorbed heat from being lost to the outside. Although the va...

Claims

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Application Information

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IPC IPC(8): F24J2/05F24J2/20F24J2/46F24J2/48F24J2/51F24S10/40F24S10/50
CPCY02E10/44
Inventor 张萍辉
Owner WUXI INST OF ARTS & TECH