CN202692286U - Solar solid dehumidification and regeneration air conditioning system - Google Patents

Abstract

The utility model relates to a solar solid dehumidification regeneration air conditioning system. Including moisture absorption bed (5), regeneration bed (6), sensible heat exchanger (7), air cooling device (8), cabin body (10), air flow partition (11), thin solid adsorption layer (12) , glass cover plate (13), moisture absorption bed (5) and regenerative bed (6) have the same structure, including cabin (10), air flow partition (11), thin solid adsorption layer (12), glass cover board (13). The utility model is a solid hygroscopic regeneration bed which integrates a flat solar heat collector and a thin solid adsorption layer. The utility model is a novel, high energy efficiency, low cost, low air flow resistance, high moisture absorption capacity, small volume and high solar heat utilization rate solid adsorption dehumidification regeneration air conditioning system. The utility model has the potential to develop into a low (zero) carbon air-conditioning system utilizing solar energy and natural energy, and can be widely used in buildings.

Description

Solar solid dehumidification regenerative air conditioning system

technical field

The utility model relates to a solar solid dehumidification regeneration air-conditioning system belonging to the technical field of new energy and energy saving, in particular to a solid dehumidification regeneration bed with direct solar energy and an air conditioning system matched therewith.

Background technique

HVAC accounts for about 50% of a building's total energy consumption. The ventilation and air conditioning system almost represents the entire content of HVAC in southern my country, and the latent cooling load related to humidity represents 25%-70% of the ventilation and air conditioning system load. Therefore, it is of great significance to find ways to save energy, reduce consumption and effectively utilize renewable energy in the dehumidification process of the air-conditioning system to achieve the goal of energy conservation and emission reduction in my country.

Traditional vapor compression refrigeration and dehumidification causes a very large energy waste due to the supercooling of air, reheating treatment and consumption of high-grade electric energy, so it is high energy consumption and unfriendly to the environment; although closed absorption refrigeration and dehumidification does not require electric energy, However, it requires a high temperature heat source, and its thermal performance coefficient is low, so it is also an undesirable air treatment method.

Combining the dehumidification of the existing moisture absorbent with the cooling of the air dry cooler (such as mechanical compression refrigeration, evaporation or dew point cooling) is an ideal air treatment method. However, the existing solid moisture absorption bed has the problems of large air flow resistance, small moisture absorption capacity, large volume and high regeneration temperature. The solid adsorption bed with silica gel as the main medium has a relatively low regeneration temperature, so it is suitable for regeneration by solar energy. However, the traditional regeneration method always uses solar heat to heat air or water first, and then sends the hot air or hot water into the adsorption bed to regenerate the adsorbent. There are two heat transfer processes from solar heat to air (water), and then from air (water) to adsorbent. Each process has a certain energy loss. In this way, the energy loss of the superposition of the two processes is relatively large, and the corresponding solar heat utilization rate is reduced. Moreover, in most cases, the solar heat collector is set separately from the adsorption bed, so that the volume and land occupation of the system are relatively large. Even if the solar heat collector is combined with the adsorption bed, in order to effectively deal with air moisture, the thickness of the adsorption bed is very large, and the solar radiation is far from penetrating the bed. In this way, the regeneration of the adsorbent still needs to be achieved by heating the air (water). This will cause the adsorbent regeneration time to be too long, and the system will be in an intermittent state of moisture absorption and regeneration. In addition, in order to improve the moisture absorption capacity of the adsorbent, the thermal mass diffusivity, and the adsorption capacity under the state of thermal equilibrium, a common method in recent years is to add some inert materials to the silica gel. However, this method cannot effectively reduce the heat release to the air due to the condensation of moisture in the air during the moisture absorption process. In this way, the subsequent devices of the air dehumidification system, such as heat exchangers and air cooling devices (mechanical compression refrigeration, evaporation or dew point cooling), have relatively large volumes and loads.

Contents of the invention

The purpose of this utility model is to provide a solid adsorption dehumidification regenerative air conditioning system with high energy efficiency, low cost, low air flow resistance, high moisture absorption capacity, small volume and high solar heat utilization rate in consideration of the above problems. The utility model has the potential to develop into a low (zero) carbon air-conditioning system using solar energy and natural energy, and can be widely used in buildings as a solar solid dehumidification regeneration air-conditioning system.

The technical solution of the utility model is: the solar solid dehumidification regeneration air conditioning system of the utility model includes a moisture absorption bed, a regeneration bed, a sensible heat exchanger, an air cooling device, a cabin body, an air flow partition, a thin solid adsorption layer, Glass cover, wherein the hygroscopic bed has the same structure as the regenerative bed, including a cabin, an air flow partition, a thin solid adsorption layer, and a glass cover, wherein the cabin is provided with an air inlet and an air outlet, and the thin solid adsorption The layers are placed in the cabin, and the glass cover is installed at the open end of the cabin. The air flow partition divides the cabin into several spaces along the length direction, and there are a number of air holes on the air flow partition, and some of the air holes are equipped with The air to be treated entering from the upper part of the hygroscopic bed can press it down to cause the light-duty sealing sheet to seal these air holes, and the cabin forms a multi-return process that makes the air to be treated skip the thin solid adsorption layer for many times, and its moisture is absorbed one by one Air flow, the side of the moisture absorption bed is also equipped with a bypass air channel to ensure the stability of the outlet air state of the moisture absorption bed, and the mixed air at the outlet of the moisture absorption bed from the moisture absorption bed and the bypass air channel passes through the sensible heat exchanger and the air After the cooling device is cooled, it is sent to the air-conditioned space in a low-temperature and low-humidity state. When the moisture absorption bed is running, it is under the direct sunlight, and the thin solid adsorption layer in the regeneration bed with the same structure as the moisture absorption bed is exposed to the sunlight. The bottom can make the water hidden in the pores of the thin solid adsorption layer evaporate to form water vapor. The indoor return air of the air-conditioned space obtains part of the heat through the sensible heat exchanger and then enters the regeneration bed from the lower part of the sensible heat exchanger, which can flow the air through the partition The indoor return air punched by the light sealing sheet on the air hole skips the thin solid adsorption layer, takes away the water vapor accumulated in the pores of the thin solid adsorption layer, and then discharges from the upper part of the regeneration bed to the outside, and the indoor return air One-way flow along the regeneration bed during the regeneration process.

The above-mentioned moisture absorption bed and regeneration bed can be switched mutually.

The air holes on the above-mentioned air flow partition plate are circular holes with small diameters.

A bypass air channel is also provided on the side of the regeneration bed.

The above-mentioned thin solid adsorption layer is composed of silica gel and microcapsule phase-change particles.

Air holes equipped with light-duty sealing sheets and air holes not equipped with light-duty sealing sheets are symmetrically distributed along both sides of the thin solid adsorption layer.

Compared with the traditional solid adsorption dehumidification air conditioning system in the prior art, the utility model has the following advantages:

(1) The utility model combines the flat solar heat collector and the thin solid adsorption layer together so that the solar radiation can directly act on the moisture of the bed to make it evaporate, without the need of heating by hot air (water) to evaporate . This can effectively improve the solar heat utilization rate of the system. The solar heat collecting surface is covered with a glass plate, which can reduce the heat loss of the bed body to the outside.

(2) The moisture absorption and regeneration of the utility model can be carried out alternately on the same bed regularly. Because the thickness of the adsorption layer is thinner, its moisture absorption and regeneration rate will be accelerated, so the switching time will also be shortened. This can ensure the relative stability of the treated outlet air state.

(3) When the bed body of the utility model is switched to the hygroscopic working state, the air to be treated passes through the opening and closing of the round hole on the partition plate (the effect of air dynamic pressure) to realize the multi-return reciprocating flow along the bed body, so as to achieve the desired air moisture absorption rate.

(4) In this utility model, when the bed body is switched to the regeneration working state, the regeneration air skipping over the bed body will take away the water vapor accumulated in the pores of the solid adsorption layer. Since the regeneration air is only used as a carrier of water vapor, it is There is no need to heat up before entering the bed, thus saving energy consumption for system regeneration. In this case, the regeneration air will flow directly along the bed through the opening of the circular hole on the partition plate (the effect of air dynamic pressure).

(5) At the outlet of the moisture-absorbing bed of the utility model, the humidity of the treated air can be realized by adjusting the flow rate of the bypass air, thereby ensuring a relatively stable outlet air state.

(6) Compared with the traditional solid adsorption layer, the thin solid adsorption layer in the present invention can obtain improved moisture absorption capacity, reduced heat and mass exchange resistance coefficient and increased air heat absorption. The increase of heat absorption can effectively reduce the outlet air temperature of the moisture absorption bed, and reduce the volume and load of other devices (processed and regenerated air heat exchangers and processed air coolers) in the desiccant air-conditioning system.

The utility model is a solid hygroscopic regeneration bed which integrates a flat solar heat collector and a thin solid adsorption layer. In order to achieve the required moisture absorption capacity in the utility model, the flow of the treated air in the bed body will be a multi-return flow pattern. In order to realize the purpose of effectively removing the moisture in the bed body by utilizing the low-temperature air, the flow of the regeneration air in the bed body will be a straight flow type. The utility model can effectively improve the utilization rate of solar heat, reduce the sensible heat taken away by the treated air through the moisture absorption bed, thereby reducing the capacity and volume of the subsequent air treatment device of the bed body, and improve the thermal/electrical performance coefficient of the system. The utility model is a novel, high energy efficiency, low cost, low air flow resistance, high moisture absorption capacity, small volume and high solar heat utilization rate solid adsorption dehumidification regeneration air conditioning system. The utility model has the potential to develop into a low (zero) carbon air-conditioning system utilizing solar energy and natural energy, and can be widely used in buildings.

Description of drawings

Fig. 1 is the schematic diagram of the utility model solar solid dehumidification regeneration air-conditioning system;

Fig. 2 is the schematic diagram of the air flow of the adsorption bed of the present invention under the hygroscopic state;

Fig. 3 is a schematic diagram of the air flow of the adsorption bed of the present invention in the regeneration state.

Detailed ways

Example:

The structural diagram of the utility model is shown in Figures 1, 2, and 3. The solar solid dehumidification regeneration air-conditioning system of the utility model includes a moisture absorption bed 5, a regeneration bed 6, a sensible heat exchanger 7, an air cooling device 8, and a cabin body. 10. Air flow partition 11, thin solid adsorption layer 12, and glass cover 13, wherein the moisture absorption bed 5 has the same structure as the regeneration bed 6, including a cabin body 10, air flow partition 11, and thin solid adsorption layer 12 , glass cover plate 13, wherein the cabin body 10 is provided with an air inlet and an air outlet, thin solid adsorption layer 12 is placed in the cabin body 10, the glass cover plate 13 is installed on the open end of the cabin body 10, and the air flow partition 11 Divide the cabin body 10 into several spaces along the length direction, and a number of air holes are opened on the air flow partition 11, and the upper part of some of the air holes is equipped with the treated air 1 entering from the upper part of the moisture absorption bed 5, which can be pressed downward to cause these The air hole is sealed with a light-duty sealing sheet. A multi-return airflow is formed in the cabin body 10 to make the treated air 1 skip the thin solid adsorption layer 12 for many times, and its moisture is absorbed successively. The stability of the outlet air state of the bed 5 is guaranteed by the bypass air channel 4, and the mixed air 2 at the outlet of the moisture absorption bed from the moisture absorption bed 5 and the bypass air channel 4 is cooled by the sensible heat exchanger 7 and the air cooling device 8. The low-temperature and low-humidity state is sent to the air-conditioned space 9. When the moisture absorption bed 5 is running, it is under the direct sunlight, and the thin solid adsorption layer 12 in the regeneration bed 6 with the same structure as the moisture absorption bed 5 is exposed to the sunlight. The water vapor hidden in the pores of the thin solid adsorption layer 12 can be evaporated to form water vapor. The indoor return air 3 of the air-conditioned space 9 obtains part of the heat through the sensible heat exchanger 7 and then enters the regeneration bed 6 from the lower part of the sensible heat exchanger 7. The indoor return air 3 that can blow away the light-duty sealing sheet on the air hole of the air flow partition 11 skips the thin solid adsorption layer 12, and takes away the water vapor accumulated in the pores of the thin solid adsorption layer 12 and then from The upper part of the regeneration bed 6 is discharged to the outside, and the indoor return air 3 flows along the regeneration bed 6 in one way during the regeneration process.

The above-mentioned moisture absorption bed 5 and regeneration bed 6 can be switched mutually.

The air holes provided on the above-mentioned air flow partition 11 are circular holes with small diameters.

A bypass air channel 4 is also provided on the side of the regeneration bed 6 .

The above-mentioned thin solid adsorption layer 12 is composed of a mixture of silica gel and microcapsule phase-change particles.

In this embodiment, air holes equipped with light-duty sealing sheets and air holes not equipped with light-duty sealing sheets are symmetrically distributed along both sides of the thin solid adsorption layer (12). the

The working principle of the present utility model is as follows: the treated air 1 that enters from the top of the moisture absorption bed 5 presses these sealing sheets downwards to cause these holes to be sealed, so that multiple return airflows are formed in the cabin body 10, as shown in Fig. 2 . The treated air 1 skips the thin solid adsorption layer 12 for many times, and its moisture is absorbed successively, so that the required dryness is reached at the outlet of the moisture absorption bed 5 . When the moisture content of the treated air 1 is absorbed, part of the heat released by the condensation of water vapor is absorbed by the phase-change particulate material in the thin solid adsorption layer 12, while the rest is taken away by the treated air 1, causing its temperature to rise . By adjusting the flow rate of the bypass air channel 4 provided beside the moisture absorption bed 5, the stability of the air state at the outlet of the moisture absorption bed 5 can be guaranteed. The mixed air 2 coming out of the hygroscopic bed 5 and the bypass air channel 4 is cooled by the sensible heat exchanger 7 and the air cooling device 8, and then sent into the air-conditioned space 9 in a low-temperature and low-humidity state. Air cooling device 8 can be mechanical compression refrigeration, evaporation or dew point etc.

While the moisture absorption bed 5 is running, the regeneration bed 6 is under the direct sunlight. Since the thin solid adsorption layer 12 is a porous medium material and its thickness is relatively thin, sunlight can pass through the thin solid adsorption layer 12, and the water hidden in the pores of the thin solid adsorption layer 12 can be evaporated to form water vapor. The indoor return air (3) of the air-conditioned space (9) is regeneration air. This part of regeneration air first obtains part of the heat through the sensible heat exchanger 7, causing its temperature to rise, and then enters the regeneration bed 6 from the bottom, and the upper part of the circular hole The set light-duty sealing sheet is punched open, skips the thin solid adsorption layer 12 evenly, and takes away the water vapor accumulated in the pores of the thin solid adsorption layer 12 . At the same time, this part of the regeneration air also takes away the heat accumulated in the microcapsule phase change particles, causing the condensation of the phase change material, and finally discharges from the upper part of the regeneration bed 6 to the outside. During the regeneration process, the regeneration air obtains part of the heat through the sensible heat exchanger, and then passes through the regeneration bed in a one-way direct flow, taking away the water vapor generated in the solid adsorption layer, thereby realizing the regeneration of the adsorption material. See Figure 3.

The moisture-absorbing bed 5 and the regeneration bed 6 have exactly the same structure, and they can be switched periodically so that their functions are interposed, so that the continuous operation of the entire dehumidification and air-conditioning system can be guaranteed.

Claims (5)

1. solar energy solid dehumidifying regeneration air-conditioning system, it is characterized in that including processed air (1), moisture absorption bed outlet mixing air (2), regeneration air (3), bypath air passage (4), moisture absorption bed (5), Regenerative beds (6), sensible heat exchanger (7), air-cooling apparatus (8), conditioned space (9), cabin body (10), Air Flow dividing plate (11), thin type solid absorption layer (12), glass cover-plate (13), wherein moisture absorption bed (5) is identical with the structure of Regenerative beds (6), include cabin body (10), Air Flow dividing plate (11), thin type solid absorption layer (12), glass cover-plate (13), its middle deck body (10) is provided with air inlet and air outlet, Air Flow dividing plate (11) is divided into some spaces along its length with cabin body (10), and the Air Flow dividing plate has some pores on (11), and the processed air (1) that enters from moisture absorption bed (5) top can cause it light seal sheet from these port sealings to lower compression is equipped with on part holes top, forming in the cabin body (10) makes processed air (1) repeatedly skip over adsorption layer (12), the one by one absorbed many backhauls air-flow of its hygroscopic water, the side of moisture absorption bed (5) also is provided with the stable guaranteed bypath air passage (4) of the outlet air state that makes moisture absorption bed (5), send into conditioned space (9) with the low temperature and low humidity state from moisture absorption bed (5) and bypath air passage (4) moisture absorption bed outlet mixing air (2) out afterwards by sensible heat exchanger (7) and air-cooling apparatus (8) cooling, when moisture absorption bed (5) moves, be under the direct irradiation of sunshine, thin type solid absorption layer (12) in the Regenerative beds (6) identical with moisture absorption bed (5) structure can make to hide in the intrapore moisture evaporation of thin type solid absorption layer (12) under the irradiation of sunray and form steam, the indoor return air (3) of conditioned space (9) enters Regenerative beds (6) from sensible heat exchanger (7) bottom after obtaining the part heat by sensible heat exchanger (7), the indoor return air (3) that light seal sheet on the set pore of Air Flow dividing plate (11) is washed open can be skipped over thin type solid absorption layer (12), to amass be hidden in the intrapore steam of thin type solid absorption layer (12) and take away after from Regenerative beds (6) top discharged to outdoor, indoor return air (3) is made one way along Regenerative beds (6) and is flowed in regenerative process.

2. solar energy solid according to claim 1 dehumidifying regeneration air-conditioning system is characterized in that above-mentioned wet bed (5), Regenerative beds (6) can switch mutually.

3. solar energy solid dehumidifying regeneration air-conditioning system according to claim 1 is characterized in that the pore that has on the above-mentioned Air Flow dividing plate (11) is the minor diameter circular hole.

4. solar energy solid dehumidifying regeneration air-conditioning system according to claim 1 is characterized in that the side of above-mentioned Regenerative beds (6) also is provided with a bypath air passage (4).

5. solar energy solid dehumidifying regeneration air-conditioning system according to claim 1 is characterized in that the pore that the pore of light seal sheet is housed on the above-mentioned Air Flow dividing plate (11) and the light seal sheet is not housed distributes along thin type solid absorption layer (12) both sides left-right symmetry.

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