CN114060999A - Vertical wall attached jet ventilation system based on double-layer phase change wall - Google Patents

Vertical wall attached jet ventilation system based on double-layer phase change wall Download PDF

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Publication number
CN114060999A
CN114060999A CN202111404000.4A CN202111404000A CN114060999A CN 114060999 A CN114060999 A CN 114060999A CN 202111404000 A CN202111404000 A CN 202111404000A CN 114060999 A CN114060999 A CN 114060999A
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ventilation
air
phase change
air supply
wall body
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CN202111404000.4A
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CN114060999B (en
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蒋达华
徐玉珍
陈璞
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Jiangxi University of Science and Technology
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Jiangxi University of Science and Technology
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/02—Materials undergoing a change of physical state when used
    • C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
    • C09K5/063—Materials absorbing or liberating heat during crystallisation; Heat storage materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D15/00—Other domestic- or space-heating systems
    • F24D15/02—Other domestic- or space-heating systems consisting of self-contained heating units, e.g. storage heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28—Arrangement or mounting of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/003—Ventilation in combination with air cleaning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/10—Heat storage materials, e.g. phase change materials or static water enclosed in a space
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

Abstract

The invention relates to the field of indoor ventilation of buildings, in particular to a vertical wall attached jet ventilation system based on a double-layer phase change wall. The technical problem is that: the displacement ventilation has higher air exchange efficiency and ventilation efficiency than the traditional mixed ventilation, but the displacement ventilation usually adopts an airflow organization mode of bottom side air supply, and the mode is limited for the practical situation of placing office equipment in a common office. The technical scheme is as follows: the utility model provides an attached efflux ventilation system of perpendicular wall based on double-deck phase transition wall body, includes side wall, roof and phase transition roof etc. the roof below is connected the phase transition roof. The vertical wall attached jet ventilation is a novel ventilation mode between mixed ventilation and replacement ventilation, can overcome the defect of low ventilation efficiency of the traditional mixed ventilation mode, can overcome the defect of limited use requirement of the replacement ventilation mode on a building space, and can effectively improve the air quality and the thermal comfort of a working area.

Description

Vertical wall attached jet ventilation system based on double-layer phase change wall
Technical Field
The invention relates to the field of indoor ventilation of buildings, in particular to a vertical wall attached jet ventilation system based on a double-layer phase change wall.
Background
Globally, the energy consumption of buildings accounts for about 25% to 30% of the total energy consumption, and among them, the energy consumption of equipment such as heating and air conditioning, which is used to ensure the health and comfort of buildings, accounts for a large proportion. In order to reduce the energy consumption of the building envelope structure, the wall body of the Ternby (Trombe) is often adopted at home and abroad, so that the energy consumption is reduced to a certain extent. However, the traditional Trombe (Trombe) wall has some problems, and in summer and daytime, due to the fact that the surface temperature of the heat storage wall is high, the indoor overheating phenomenon is easy to occur; in winter, the surface of the thick heat storage wall is slowly heated; at night in winter, the heat storage wall with higher temperature can transfer heat to the outside while radiating heat to the inside to generate larger heat loss; the solar energy intensity is periodically and intermittently changed, so that the solar energy utilization rate is low. Therefore, the phase-change heat storage wall body can be formed by combining the phase-change material. The working area of the vertical wall attached jet ventilation system is close to the air supply environment during operation, which is beneficial to human health. The solar phase-change energy storage technology is applied to the attached jet ventilation system, and the natural cold (heat) source can be utilized to reduce the cold (heat) supply load of the building, so that the indoor comfort is improved.
Indoor ventilation and air conditioning systems directly influence indoor airflow organization modes, and further influence the health and comfort of indoor personnel. The existing ventilation mode mainly comprises mixed ventilation and replacement ventilation, wherein the mixed ventilation is based on the consideration of building space, the concentration of indoor pollutants is diluted by feeding fresh air into a room, so that the concentration of the indoor pollutants is reduced to be below an allowable standard, and the air quality of the mixed ventilation is close to that of return air; the replacement ventilation is based on the consideration of human health and energy efficiency, based on the principle that hot air flow formed by air density difference rises and cold air flow falls, fresh air is directly sent into a personnel working area from the bottom of a room, because the air supply temperature is lower than the indoor air temperature, the air supply firstly spreads to the whole ground under the action of gravity, then flows from bottom to top under the actions of subsequent air supply pushing and heat convection air flow entrainment to form a dominant air flow of indoor air movement, and finally is discharged outdoors at the top of the room, and the air supply quality is close to the air supply.
The displacement ventilation has higher air exchange efficiency and ventilation efficiency than the traditional mixed ventilation, but the displacement ventilation usually adopts an airflow organization mode of bottom side air supply, and the mode is limited for the practical situation of placing office equipment in a common office. And the vertical wall attached jet flow can achieve the air supply effect similar to replacement ventilation, so that if the double-layer phase change wall body and the vertical wall attached jet flow ventilation are combined, the comfort of indoor personnel can be further improved on the basis of energy conservation and emission reduction. The invention has very important significance for reducing the building energy consumption.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a vertical wall attached jet ventilation system based on a double-layer phase change wall body.
The technical scheme is as follows: a vertical wall attached jet ventilation system based on a double-layer phase change wall body comprises a side wall, a roof, a phase change top plate, an air supply opening and an air exhaust opening, wherein the phase change top plate is connected below the roof; the fresh air pipe is communicated with the air processor, the air processor is used for purifying the fed air, the air processor is communicated with the air supply pipe, and the air supply pipe is communicated with the air supply outlet; the air return pipe is communicated with the air return port; the side wall uses a ventilation and heat storage wall body, the ventilation and heat storage wall body comprises a glass cover plate, a ventilation interlayer, a heat storage wall body and a filter screen, the glass cover plate is provided with a ventilation hole I and a ventilation hole II, the bottom of the ventilation interlayer is provided with the filter screen, the distance between the filter screen and the ground is within 600mm, the heat storage wall body is provided with a ventilation hole III and a ventilation hole IV, and the thickness of the ventilation and heat storage wall body is 190-360 mm; the internal structure of the heat storage wall body sequentially comprises a phase change plate I, a heat insulation layer, a wall body, a heat insulation layer and a phase change plate II from left to right; the air port position of the air supply port is staggered with the air port position of the vent hole III, and the jet flow air supply speed of the air supply port is 0.5-1.0 m/s; the air supply angle of the air supply outlet is 0-90 degrees and used for attaching jet flow, and the air supply angle is an included angle between the outflow direction of the air supply outlet and the normal line of the side wall.
Further, the thickness of the glass cover plate is 6-10 mm.
Further, the thickness of the ventilation interlayer is 150-200 mm.
Furthermore, the thickness of the phase change plate I is 50-100mm, the thickness of the heat insulation layer is 20-30mm, the thickness of the wall body is 50-100mm, and the thickness of the phase change plate II is 50-100 mm.
Further, the vent I and the vent II are rectangular holes with the length of 200mm and the width of 100mm and the width of 150mm, and the vent I is positioned above the vent II;
the vent hole III and the vent hole IV are rectangular holes with the length of 200mm and the width of 100mm and the width of 150mm, and the vent hole III is positioned above the vent hole IV.
Further, the size of the air outlet is 0.40 multiplied by 0.4m2。
Further, the phase change material used by the phase change top plate is a mixture of 20-30% of myristic acid and 70-80% of tetradecanol in percentage by mass, the phase change temperature is 30-36 ℃, and the latent heat of phase change is about 208.0J/g.
Further, the phase change material used by the phase change plate I is a mixture of 60-65% of lauric acid, 20-25% of palmitic acid and 10-15% of stearic acid in percentage by mass, the phase change temperature is 30-35 ℃, and the latent heat of phase change is 151.6J/g.
Further, the phase change material used by the phase change plate II is a mixture of 40-50% of lauric acid and 50-60% of tetradecanol in mass fraction, the phase change temperature is 23-28 ℃, and the latent heat of phase change is 150.45J/g.
Furthermore, the side walls are free of obstacles.
Further, the fresh air system comprises a fresh air valve, an air supply valve, an exhaust valve and an air return valve, wherein the fresh air valve is connected to the fresh air pipe, the air supply valve is connected to the air supply pipe, the exhaust valve is connected to the exhaust pipe, and the air return valve is connected to the fresh air pipe and the exhaust pipe through pipelines.
The invention has the beneficial effects that:
the vertical wall attached jet ventilation is a novel ventilation mode between mixed ventilation and replacement ventilation, can overcome the defect of low ventilation efficiency of the traditional mixed ventilation mode, can overcome the defect of limited use requirement of the replacement ventilation mode on a building space, and can effectively improve the air quality and the thermal comfort of a working area.
The phase change heat storage wall body and the ventilation wall body are combined into the ventilation heat storage wall body, and the structure of the double-layer phase change plate is adopted, so that indoor temperature fluctuation can be reduced in winter and summer, and the building energy consumption is effectively reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, it is obvious that the drawings in the following description are only one embodiment of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a vertical wall attached jet ventilation system based on a double-layer phase change wall body;
FIG. 2 is a schematic structural diagram of a ventilation system of an embodiment of the vertical wall attached jet ventilation system based on a double-layer phase-change wall body;
FIG. 3 is a schematic structural diagram of a heat storage wall body of a vertical wall attached jet ventilation system embodiment of the present invention based on a double-layer phase change wall body;
FIG. 4 is a schematic view of the summer daytime airflow pattern of the vertical wall attached jet ventilation system based on the embodiment of the double-layer phase-change wall body of the present invention;
FIG. 5 is a schematic view of the air flow pattern in the daytime in winter according to the embodiment of the vertical wall attached jet ventilation system based on the double-layer phase-change wall body of the present invention.
Reference numerals: 1-glass cover plate, 2-ventilation interlayer, 3-heat storage wall, 4-roof, 5-phase change top plate, 6-ventilation hole I, 7-ventilation hole II, 8-filter screen, 9-ventilation hole III, 10-ventilation hole IV, 12-exhaust outlet, 13-fresh air pipe, 14-fresh air valve, 15-air processor, 16-air supply pipe, 17-air supply valve, 18-air supply outlet, 19-air return pipe, 20-exhaust pipe, 21-exhaust valve, 22-air return valve, 51-phase change plate I, 52-heat insulation layer, 53-wall and 54-phase change plate II.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.
A vertical wall attached jet flow ventilation system based on a double-layer phase change wall body comprises a side wall, a roof 4, a phase change top plate 5, an air supply opening 18 and an air exhaust opening 12, wherein the phase change top plate 5 is connected below the roof 4, the air supply opening 18 is communicated with the roof 4 and the phase change top plate 5, and the air supply opening 18 is an adjustable louver opening and is installed on the roof 4 and close to the side wall; the fresh air pipe 13 is communicated with the air processor 15, the air processor 15 is used for purifying the fed air, the air processor 15 is communicated with the blast pipe 16, and the blast pipe 16 is communicated with the blast opening 18; the air return pipe is characterized by further comprising an air return pipe 19 and an exhaust pipe 20, the exhaust outlet 12 is communicated with the air return pipe 19, and the air return pipe 19 is communicated with the air return pipe 19; the side wall is a ventilation and heat storage wall, the ventilation and heat storage wall comprises a glass cover plate 1, a ventilation interlayer 2, a heat storage wall 3 and a filter screen 8, a ventilation hole I6 and a ventilation hole II 7 are formed in the glass cover plate 1, the filter screen 8 is arranged at the bottom of the ventilation interlayer 2, the distance between the filter screen 8 and the ground is within 600mm, a ventilation hole III 9 and a ventilation hole IV 10 are formed in the heat storage wall 3, and the thickness of the ventilation and heat storage wall is 190-360 mm; the internal structure of the heat storage wall 3 sequentially comprises a phase change plate I51, a heat insulation layer 52, a wall 53, a heat insulation layer 52 and a phase change plate II 54 from left to right; the air port position of the air supply port 18 is staggered with the air port position of the vent hole III 9, and the jet flow air supply speed of the air supply port 18 is 0.5m/s-1.0 m/s; the air supply angle of the air supply outlet 18 is 0-90 degrees and is used for attaching jet flow, and the air supply angle is an included angle between the outflow direction of the air supply outlet 18 and the normal line of the side wall.
The thickness of the glass cover plate 1 is 6-10 mm.
The thickness of the ventilation interlayer 2 is 150-200 mm.
The thickness of the phase change plate I51 is 50-100mm, the thickness of the heat insulation layer 52 is 20-30mm, the thickness of the wall body 53 is 50-100mm, and the thickness of the phase change plate II 54 is 50-100 mm.
The vent I6 and the vent II 7 are rectangular holes with the length of 200-300mm and the width of 100-150mm, and the vent I6 is positioned above the vent II 7;
the vent hole III 9 and the vent hole IV 10 are rectangular holes with the length of 200mm and the width of 100mm and the width of 150mm, and the vent hole III 9 is positioned above the vent hole IV 10.
The size of the air outlet 12 is 0.40 multiplied by 0.4m2。
The phase change material used by the phase change top plate 5 is a mixture of 20-30% of myristic acid and 70-80% of tetradecanol in percentage by mass, the phase change temperature is 30-36 ℃, and the latent heat of phase change is about 208.0J/g.
The phase change material used by the phase change plate I51 is a mixture of 60-65% of lauric acid, 20-25% of palmitic acid and 10-15% of stearic acid in percentage by mass, the phase change temperature is 30-35 ℃, and the latent heat of phase change is 151.6J/g.
The phase change material used by the phase change plate II 54 is a mixture of 40-50% of lauric acid and 50-60% of tetradecanol in mass fraction, the phase change temperature is 23-28 ℃, and the phase change latent heat is 150.45J/g.
And no barrier is arranged on the side wall.
Still including fresh air valve 14, blast valve 17, exhaust valve 21 and return air valve 22, fresh air valve 14 is connected on fresh air pipe 13, blast valve 17 is connected on blast pipe 16, exhaust valve 21 is connected on exhaust pipe 20, return air valve 22 passes through the pipe connection fresh air pipe 13 with exhaust pipe 20.
The working principle is as follows: a ventilation system in a mode of ventilating and heat storage walls, a roof 4, a phase change roof 5 and a vertical wall attached jet air lake is arranged in a building. The ventilation and heat storage wall comprises a glass cover plate 1, a ventilation interlayer 2 and a heat storage wall 3; a vent hole I6 and a vent hole II 7 are formed in the glass cover plate 1, a filter screen 8 in the ventilation interlayer 2 is arranged at the position 400mm away from the ground on the lower side, and the internal structure of the heat storage wall body 3 sequentially comprises a phase change plate I51, a heat insulation layer 52, a wall body 53, a heat insulation layer 52 and a phase change plate II 54 from left to right and is provided with a vent hole III 9 and a vent hole IV 10. The vertical wall attached jet ventilation system comprises a fresh air pipe 13, an air processor 15, an air supply pipe 16, an air supply outlet 18, an exhaust outlet 12, a return air pipe 19 and an exhaust pipe 20. The air supply outlet 18 is an adjustable shutter air inlet which is arranged at the top of a room and close to the position of the side wall, the position of the air inlet is staggered with the position of the vent hole III 9, the jet flow air supply speed of the air supply outlet 18 is 0.5-1.0 m/s, in order to achieve the attached jet flow effect, the air supply angle of the air supply outlet 18 is 0-90 degrees, and the air supply angle refers to the included angle between the outflow direction of the air supply outlet 18 and the normal line of the side wall.
In summer, in daytime, the vent I6 and the vent II 7 are opened, the vent III 9 and the vent IV 10 are closed, outdoor air passes through the filter screen 8 through the vent II 7 and enters the ventilation interlayer 2, then rises upwards under the action of hot pressing and is discharged from the vent I6, and a part of solar radiation heat is taken away, so that the cold load of the enclosure structure is reduced, the phase change plate I51 in the heat storage wall body 3 absorbs certain solar radiation heat to generate phase change, solid is changed into liquid, heat transfer is realized, and the indoor thermal comfort can be improved. Cold air sent out by the air supply opening 18 carries out heat convection with the indoor space, the phase change plate II 54 can reduce the dissipation of cold quantity, and because the flow velocity of air supply jet flow close to the side wall is large and the static pressure is small, and the static pressure far away from the side wall is large, air is supplied on the side wall under the action of pressure difference to form an attaching effect, the air supply range is prolonged, and fresh air can be better provided for the indoor space. In summer and night, the phase change plate I51 is subjected to phase change again, heat accumulated in the daytime is released indoors and outdoors, and cold accumulated by the phase change plate II 54 can reduce the influence of the phase change plate I51 on an indoor thermal environment. The night enclosure structure has less cold load, so the air supply quantity at night can be reduced. The redundant cold energy stored by the night phase change plate II 54 can have a certain regulating effect on the indoor space in the next day, and the process is circulated.
In winter, the ventilation holes III 9 and 10-the ventilation holes IV 10 are opened, the ventilation holes I6 and the ventilation holes II 7 are closed, indoor cold air passes through the filter screen 8 through the ventilation holes IV 10 to enter the ventilation interlayer 2, the cold air rises through solar radiation heating and returns to the indoor through the ventilation holes 9, a part of solar radiation heat heats the air in the ventilation interlayer 2, and a part of the solar radiation heat heats the phase change plate I51 to enable the phase change heat storage. The hot air sent out by the air supply outlet 18 carries out heat convection with the indoor space, and simultaneously heats the phase change plate II 54 to enable the phase change plate II to store heat, so that heat loss is reduced. At night in winter, the vent I6, the vent II 7, the vent III 9 and the vent IV 10 are all closed, one part of heat accumulated in the daytime of the phase change plate I51 is dissipated outdoors, one part of heat is transferred to the phase change plate II 54, and the stored heat is released indoors by the phase change plate II 54. The night enclosure structure has larger heat load, so the air supply quantity at night can be increased.
For the ventilation system, outdoor fresh air is mixed with indoor return air through the fresh air pipe 13, and the mixing proportion of the fresh air and the return air is adjusted by controlling the opening size of the fresh air valve 14 and the return air valve 22. The mixed air is processed by an air processor 15, then is delivered into a room through a delivery pipe 16 and a delivery port 18 to form a coherent jet, and the opening of a delivery valve 17 is adjusted to control the delivery temperature. The polluted air in the room is exhausted through the exhaust outlet 12 and the exhaust pipe 20.
Example 1
In summer, in daytime, a heat insulation curtain or a blind window with a light-colored outer surface can be additionally used as a heat insulation layer 52 and placed in the ventilation interlayer 2, the ventilation hole I6 and the ventilation hole II 7 are opened, the ventilation holes III 9 and 10-the ventilation hole IV 10 are closed, outdoor wind passes through the filter screen 8 through the ventilation hole II 7 and enters the ventilation interlayer 2, and then rises upwards under the action of heat pressure and is discharged from the ventilation hole I6, so that a part of solar radiation heat is taken away, the cold load of the enclosure structure is reduced, the phase change plate I51 in the heat storage wall body 3 absorbs certain solar radiation heat to generate phase change, solid is changed into liquid, heat transfer is realized, and the indoor thermal comfort is improved. Because the flow velocity of the air supply jet flow close to the side wall is large, the static pressure is small, and the static pressure far away from the side wall is large, the air supply forms an attaching effect on the side wall under the action of the pressure difference, the range of the air supply is prolonged, and fresh air can be better provided for the indoor environment.
Example 2
In summer and night implementation, the heat insulation window or the shutter is moved away in summer and night, whether the ventilation hole I6 and the ventilation hole II 7 are opened or closed is unimportant, at the moment, the phase change plate I51 is subjected to phase change, heat accumulated in the daytime is released indoors and outdoors, and cold accumulated by the phase change plate II 54 can reduce the influence of the phase change plate I51 on the indoor thermal environment. The night enclosure structure has less cold load, so the air supply quantity at night can be reduced. The redundant cold energy stored by the night phase change plate II 54 can have a certain regulating effect on the indoor space in the next day, and the process is circulated.
Example 3
In winter, in daytime, the vent holes III 9 and 10-the vent hole IV 10 are opened, the vent hole I6 and the vent hole II 7 are closed, indoor cold air passes through the filter screen 8 through the vent hole IV 10 to enter the ventilation interlayer 2, rises through solar radiation heating and returns to the indoor through the vent hole III 9, a part of solar radiation heat heats air in the ventilation interlayer 2, and a part of solar radiation heat heats the phase change plate I51 to enable the phase change plate to store heat. The hot air sent out by the air supply outlet 18 carries out heat convection with the indoor space, and simultaneously heats the phase change plate II 54 to enable the phase change plate II to store heat, so that heat loss is reduced.
Example 4
In the winter night implementation case, at night, the vent I6, the vent II 7, the vent III 9 and the vent IV 10 are all closed, one part of heat accumulated in the daytime of the phase change plate I51 is dissipated to the outside, one part of heat is transferred to the phase change plate II 54, and the phase change plate II 54 releases the stored heat to the inside. The night enclosure structure has larger heat load, so the air supply quantity at night can be increased.
For the ventilation system, outdoor fresh air is mixed with indoor return air through the fresh air pipe 13, and the mixing proportion of the fresh air and the return air is adjusted by controlling the opening size of the fresh air valve 14 and the return air valve 22. The mixed air is processed by an air processor 15, then is delivered into a room through a delivery pipe 16 and a delivery port 18 to form a coherent jet, and the opening of a delivery valve 17 is adjusted to control the delivery temperature. The polluted air in the room is exhausted through the exhaust outlet 12 and the exhaust pipe 20.
Example 5
In the transition season, a heat insulation curtain or a blind window does not need to be arranged in the ventilation interlayer 2, the ventilation hole III 9 and the ventilation hole IV 10 can be opened or closed, and the ventilation hole I6, the ventilation hole II 7, the ventilation hole III 9 and the ventilation hole IV 10 can be adjusted according to the outdoor temperature condition and the comfort requirement of indoor personnel. The ventilation system does not need to operate in the transition season, and energy transfer at daytime and night can be realized by utilizing the double-layer phase change heat storage wall body.
The above examples merely represent preferred embodiments of the present invention and are not to be construed as limiting the scope of the patent. It should be noted that, for those skilled in the art, other various changes and modifications can be made according to the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the present invention.

Claims (10)

1. The vertical wall attached jet ventilation system based on the double-layer phase change wall comprises a side wall and a roof (4), and is characterized by further comprising a phase change top plate (5), an air supply opening (18) and an air exhaust opening (12), wherein the phase change top plate (5) is connected below the roof (4), the air supply opening (18) is communicated with the roof (4) and the phase change top plate (5), and the air supply opening (18) is an adjustable louver opening and is installed on the roof (4) and close to the side wall;
the fresh air supply device is characterized by further comprising a fresh air pipe (13), an air processor (15) and an air supply pipe (16), wherein the fresh air pipe (13) is communicated with the air processor (15), the air processor (15) is used for purifying the supplied air, the air processor (15) is communicated with the air supply pipe (16), and the air supply pipe (16) is communicated with the air supply opening (18);
the air return pipe is characterized by further comprising an air return pipe (19) and an exhaust pipe (20), the exhaust outlet (12) is communicated with the air return pipe (19), and the air return pipe (19) is communicated with the air return pipe (19);
the side wall uses a ventilation and heat storage wall body, the ventilation and heat storage wall body comprises a glass cover plate (1), a ventilation interlayer (2), a heat storage wall body (3) and a filter screen (8), the glass cover plate (1) is provided with a ventilation hole I (6) and a ventilation hole II (7), the bottom of the ventilation interlayer (2) is provided with the filter screen (8), the height of the filter screen (8) from the ground is within 600mm, the heat storage wall body (3) is provided with a ventilation hole III (9) and a ventilation hole IV (10), and the thickness of the ventilation and heat storage wall body is 190-360 mm;
the internal structure of the heat storage wall body (3) is sequentially provided with a phase change plate I (51), a heat insulation layer (52), a wall body (53), the heat insulation layer (52) and a phase change plate II (54) from left to right;
the air port position of the air supply port (18) is staggered with the air port position of the vent hole III (9), and the jet flow air supply speed of the air supply port (18) is 0.5-1.0 m/s; the air supply angle of the air supply outlet (18) is 0-90 degrees and is used for attaching jet flow, and the air supply angle is an included angle between the outflow direction of the air supply outlet (18) and the normal line of the side wall.
2. The vertical wall attached jet ventilation system based on the double-layer phase-change wall body as claimed in claim 1, wherein the thickness of the glass cover plate (1) is 6-10 mm.
3. The vertical wall attached jet ventilation system based on the double-layer phase-change wall body as claimed in claim 1, wherein the thickness of the ventilation interlayer (2) is 150-200 mm.
4. The vertical wall attached jet ventilation system based on the double-layer phase-change wall body as claimed in claim 1, wherein the thickness of the phase-change plate I (51) is 50-100mm, the thickness of the thermal insulation layer (52) is 20-30mm, the thickness of the wall body (53) is 50-100mm, and the thickness of the phase-change plate II (54) is 50-100 mm.
5. The vertical wall attached jet flow ventilation system based on the double-layer phase-change wall body as claimed in claim 1, wherein the vent I (6) and the vent II (7) are rectangular holes with a length of 200-300mm and a width of 100-150mm, and the vent I (6) is located above the vent II (7);
the vent hole III (9) and the vent hole IV (10) are rectangular holes, the length is 200mm and 300mm, the width is 100mm and 150mm, and the vent hole III (9) is positioned above the vent hole IV (10).
6. The vertical wall attached jet ventilation system based on the double-layer phase-change wall body as claimed in claim 1, wherein the size of the air outlet (12) is 0.40 x 0.4m2。
7. The vertical wall attached jet ventilation system based on the double-layer phase-change wall body as claimed in claim 1, wherein the phase-change material used for the phase-change top plate (5) is a mixture of 20-30% of myristic acid and 70-80% of tetradecanol by mass, the phase-change temperature is 30-36 ℃, and the latent heat of phase change is about 208.0J/g.
8. The vertical wall attached jet ventilation system based on the double-layer phase change wall body as claimed in claim 1, wherein the phase change material used for the phase change plate I (51) is a mixture of 60% -65% of lauric acid, 20% -25% of palmitic acid and 10% -15% of stearic acid in percentage by mass, the phase change temperature is 30-35 ℃, and the latent heat of phase change is 151.6J/g.
9. The vertical wall attached jet ventilation system based on the double-layer phase change wall body as claimed in claim 1, wherein the phase change material used by the phase change plate II (54) is a mixture of 40-50% by mass of lauric acid and 50-60% by mass of tetradecanol, the phase change temperature is 23-28 ℃, and the latent heat of phase change is 150.45J/g.
10. The double-layer phase-change wall-based vertical wall attached jet ventilation system as claimed in claim 1, wherein the side walls are free of obstacles.
CN202111404000.4A 2021-11-24 2021-11-24 Vertical wall attached jet ventilation system based on double-layer phase-change wall body Active CN114060999B (en)

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