Cold wall system utilizing night sky radiation for refrigeration

Abstract

The utility model discloses a cold wall system utilizing night sky radiation for refrigeration, which belongs to the technical field of building energy conservation and renewable energy utilization and comprises a water storage plate arranged on the inner side of a wall body, a night sky radiation cooling plate arranged on a roof and a circulating pipeline connected with the night sky radiation cooling plate and the water storage plate. In the daytime, the liquid working medium in the water storage plate absorbs indoor and outdoor heat and stores the heat, the indoor temperature is lowered, and the temperature of the liquid working medium rises. At night, the heated liquid working medium in the water storage plate enters a flow channel in the night sky radiation cooling plate on the roof, heat is released in an infrared long wave radiation mode, the temperature of the liquid working medium is lowered, and the cooled liquid working medium flows into the water storage plate again, absorbs indoor and outdoor heat again and circulates continuously. The advantages of wall heat storage and night sky radiation cooling are utilized, heat load formed by heat transfer of the building wall can be effectively reduced through heat energy transfer and circular flow, indoor temperature fluctuation is reduced, energy consumption is reduced, and indoor comfort is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of building energy conservation and renewable energy utilization, and specifically relates to a cold wall system utilizing nighttime sky radiation for cooling. Background Art

[0002] Global warming and energy issues are becoming increasingly urgent, and promoting building energy conservation and environmental protection has become a topic of concern in today's society. Traditional building heating and cooling rely on air conditioning systems, which have high energy consumption and high maintenance costs. Long-term use may lead to deterioration of air quality and health problems. In addition, there may be energy supply shortages during peak power periods, which cannot fundamentally solve the problems of building energy consumption and environmental pollution. Therefore, there is an urgent need to innovate efficient and sustainable methods to effectively reduce indoor temperature, reduce energy consumption, and improve indoor comfort.

[0003] Setting up heat storage panels on the inner surface of building walls to absorb indoor heat has become an effective method for regulating room temperature. However, the outdoor temperature is lower at night. In the absence of an appropriate heat dissipation mechanism, traditional heat storage panels may find it difficult to dissipate heat quickly and effectively, resulting in excessive temperatures and affecting indoor comfort. Therefore, existing technologies still face many challenges in nighttime heat energy management.

[0004] In addition, based on the principle of thermal radiation, objects will radiate heat energy to their surroundings, including emitting long-wave infrared radiation to the sky. In the prior art, night sky radiation cooling is a technology that uses objects to radiate heat to the night sky at night, thereby reducing the temperature of the objects. Utility Model Content

[0005] In response to one or more of the above defects or improvement needs in the prior art, the utility model provides a cold wall system that utilizes night sky radiation cooling. By utilizing the advantages of wall heat storage and night sky radiation cooling, through heat energy transfer and circulation flow, it can effectively reduce the heat load formed by heat transfer of building walls and reduce indoor temperature fluctuations, thereby reducing energy consumption and improving indoor comfort.

[0006] To achieve the above object, the utility model provides a cold wall system utilizing nighttime sky radiation cooling, comprising:

[0007] The water storage plate is arranged inside the wall and contains liquid working medium to absorb indoor and outdoor heat during the day;

[0008] A nighttime sky radiation cooling panel is provided on the roof and is used to cool the liquid working medium input from the water storage panel and absorbing the indoor and outdoor heat;

[0009] The circulation pipeline is used to connect the water storage plate and the night sky radiation cooling plate, transfer the heat absorbed by the water storage plate to the night sky radiation cooling plate on the roof for heat dissipation through the circulation of liquid working medium, and transfer the cooled liquid working medium to the water storage plate.

[0010] As a further improvement of the present invention, the surface of the nighttime sky radiation cooling panel has a radiation cooling material, and the radiation cooling material is a coating or a film.

[0011] As a further improvement of the utility model, the night sky radiation cooling panel is a plate structure containing a cavity, and a plurality of partitions are arranged in the plate structure to divide the interior of the night sky radiation cooling panel into a plurality of flow channels; or,

[0012] The nighttime sky radiation cooling panel is an embedded tubular assembly structure, and its internal pipes are a series structure or a parallel structure to form a plurality of flow channels.

[0013] As a further improvement of the utility model, the water storage plate comprises a metal thin splint shell, and the liquid working medium is contained in the internal cavity of the metal thin splint shell.

[0014] As a further improvement of the utility model, a plurality of transverse internal support structures of the metal sandwich plate are further provided inside the metal sandwich plate shell to support the heat exchange surfaces of the metal sandwich plate shell on both sides thereof.

[0015] As a further improvement of the present invention, the water storage plate is a prefabricated flat plate structure as a whole.

[0016] As a further improvement of the utility model, the circulation pipeline includes a water supply pipe and a water return pipe;

[0017] One end of the water return pipe is connected to the water outlet of the water storage plate, and the other end is connected to the water inlet of the night sky radiation cooling plate;

[0018] One end of the water supply pipe is connected to the water outlet of the night sky radiation cooling plate, and the other end is connected to the water inlet of the water storage plate.

[0019] As a further improvement of the utility model, a water pump is provided on the water return pipe and / or the water supply pipe.

[0020] As a further improvement of the utility model, the water outlet of the water storage plate is arranged at the top thereof, and the water inlet of the water storage plate is arranged at the bottom thereof.

[0021] As a further improvement of the utility model,

[0022] Each wall is provided with a corresponding water storage plate on the inner side, which is cold-connected to the same night sky radiation cooling plate through the circulation pipeline, or,

[0023] A corresponding water storage plate is provided on the inner side of each wall, which is connected to the corresponding night sky radiation cooling plate through the circulation pipeline.

[0024] In general, the above technical solution conceived by the utility model has the following beneficial effects compared with the prior art:

[0025] (1) The utility model discloses a cold wall system utilizing night sky radiation cooling. The closed circulating medium circulation passage is formed by the night sky radiation cooling panel on the roof, the water storage panel in the wall and the circulating pipeline, so that the liquid medium circulates in the loop. The night sky radiation cooling panel is used to cool the liquid medium to achieve the heat dissipation of the liquid medium in the water storage panel, thereby effectively reducing the heat load formed by heat transfer of the building wall, reducing the use of air conditioning or heating, and reducing energy consumption.

[0026] (2) The utility model utilizes nighttime sky radiation cooling in the cold wall system. By utilizing the high heat capacity of the water storage plate, it can absorb a large amount of indoor and outdoor heat, reduce indoor temperature fluctuations, and thus achieve a certain cooling effect.

[0027] (3) The utility model uses the night sky radiation cooling cold wall system, which has a simple structure, is easy to arrange and control, and is convenient to install and maintain. The night sky radiation cooling panel, which is a heat dissipation device that uses a natural cold source, can effectively reduce energy consumption and resource waste, reduce the use of air-conditioning equipment, reduce carbon emissions, protect the environment, and save energy and be efficient.

[0028] (4) The utility model uses night sky radiation cooling to cool the cold wall system. In seasons where cooling is required, the night sky radiation cooling plate can be used to cool the liquid working medium in the water storage plate. In winter, the heat storage capacity of the liquid heat carrier can be used to reduce indoor temperature fluctuations and reduce indoor heat loss, thereby achieving energy-saving and heat preservation effects, and can meet the cooling mode in summer and the heat preservation mode in winter. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of a cold wall system utilizing nighttime sky radiation cooling according to the utility model;

[0030] Figure 2 The utility model is a schematic cross-sectional structure diagram of a water storage plate involved in a cold wall system structure utilizing nighttime sky radiation cooling.

[0031] In all the drawings, the same reference numerals represent the same technical features, specifically: 1-night sky radiation cooling panel, 2-water pump, 3-water return pipe, 4-water storage plate, 5-wall outer wall, 6-water supply pipe;

[0032] 401-liquid working medium, 402-thin metal splint shell, 403-splint internal supporting structure. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] like Figure 1 and Figure 2 As shown, the utility model provides a cold wall system utilizing night sky radiation cooling, which can be combined with a traditional wall to achieve a cooling effect on the room. The system includes a night sky radiation cooling plate 1, a water storage plate 4, and a circulation pipeline connecting the night sky radiation cooling plate 1 and the water storage plate 4. The water storage plate 4 is arranged on the inner side of the wall, and has a liquid working medium inside, which is used to absorb indoor and outdoor heat during the day to reduce indoor temperature fluctuations, and release it to the night sky radiation cooling plate 1 at night to reduce the indoor temperature; the night sky radiation cooling plate 1 is arranged on the roof, and is used to cool the liquid working medium that absorbs indoor and outdoor heat transmitted from the water storage plate 4. The circulation pipeline is used to transfer the heat absorbed by the water storage plate on the inner side of the wall to the night sky radiation cooling plate 1 on the roof for heat dissipation through the circulation of the liquid working medium, and transfer the cooled liquid working medium to the water storage plate 4.

[0039] Specifically, the water storage plate 4 includes a metal thin plywood shell 402, and the internal cavity of the metal thin plywood shell 402 contains a liquid working medium 401, which absorbs indoor and outdoor heat and stores it as a heat carrier. The liquid working medium 401 can be water, and of course, other liquid materials with large heat capacity in the prior art can also be selected as a substitute. The metal thin plywood shell 402 is also provided with a plurality of transverse plywood internal support structures 403 to support the metal thin plywood shell heat exchange surfaces on both sides thereof, thereby increasing the overall connection strength of the plywood structure.

[0040] Preferably, the metal thin splint shell 402 is made of high thermal conductivity, corrosion-resistant metal, such as aluminum with a corrosion-resistant coating on the surface; the splint internal support structure 403 is made of corrosion-resistant metal, such as stainless steel.

[0041] Preferably, the water storage plate 4 is a flat plate structure as a whole, and water storage plates of different sizes can be prefabricated, so that they can be directly assembled to the inner side of a traditional wall to absorb heat at a later time.

[0042] Furthermore, the night sky radiation cooling plate 1 is used to absorb the heat of the liquid working medium 401 input into the water storage plate 4, and release the heat by long-wave radiation. The surface of the night sky radiation cooling plate 1 has a radiation cooling material, which emits heat to space in the form of infrared long-wave radiation and reduces its own temperature. The radiation cooling material can be a medium radiation cooling material in the prior art, for example, the radiation cooling material can be a coating or a film, the coating in the prior art includes an acrylic emulsion containing carbon black, carbon nanotubes or nano diamond powder, and the film in the prior art includes a polyvinyl fluoride film.

[0043] The night sky radiation cooling panel 1 is provided with an internal flow channel for cooling the liquid working medium flowing therethrough. The specific design of the internal flow channel can be flexibly selected.

[0044] In a preferred embodiment, the night sky radiation cooling panel 1 includes a plate structure with a cavity, and a plurality of partitions are arranged in the plate structure to divide the interior of the cooling panel into a plurality of flow channels.

[0045] In another preferred embodiment, the night sky radiation cooling panel 1 is an embedded tube assembly structure, and its internal pipeline is a series structure or a parallel structure; wherein the series structure means that the liquid working medium flows into the embedded tube in the night sky radiation cooling panel 1 from an inlet without diversion, and then flows out from the outlet; the parallel structure means that the liquid working medium flows from the embedded tube main pipe in the night sky radiation cooling panel 1 into different tributaries, and is collected in another main pipe and then flows out.

[0046] Furthermore, the circulation pipeline includes a water supply pipe 6 and a water return pipe 3, and the night sky radiation cooling panel 1 and the water storage panel 4 are connected at the same time through the water supply pipe 6 and the water return pipe 3. One end of the water supply pipe 6 is connected to the water outlet of the night sky radiation cooling panel 1, and the other end is connected to the water inlet of the water storage panel 4, which is used to introduce the liquid working medium after the night sky radiation cooling panel 1 is cooled down into the water storage panel 4 inside the wall; one end of the water return pipe 3 is connected to the water outlet of the water storage panel 4, and the other end is connected to the water inlet of the night sky radiation cooling panel 1, which is used to guide the liquid working medium in the water storage panel 4 inside the wall back to the night sky radiation cooling panel 1 for cooling down.

[0047] The water storage plate 4 absorbs indoor and outdoor heat during the day and uses it to heat the liquid working medium 401 in the plate. At night, the heated liquid working medium 401 is sent to the night sky radiation cooling plate 1 through the return pipe 3, and after cooling, it is transmitted to the water storage plate 4 through the water supply pipe 6.

[0048] In a preferred embodiment, a water pump 2 is provided on the water return pipe 3 and / or the water supply pipe 6 to provide power for the liquid working medium to circulate in the pipeline.

[0049] In a preferred embodiment, the water outlet of the water storage plate 4 is arranged at its top, and the water inlet of the water storage plate 4 is arranged at its bottom, that is, the water storage plate 4 adopts a bottom supply and top return mode, which is beneficial to reduce the influence of cold and hot water stratification on the return water temperature.

[0050] It should be noted that, in the embodiment shown in the accompanying drawings, a water storage plate 4 is provided on the inner side of one wall. Of course, water storage plates 4 can also be provided on the inner sides of other walls at the same time, and can be connected to the same night sky radiation cooling plate 1 through a return pipe 3 and a water supply pipe 6, or can be connected to the corresponding night sky radiation cooling plate cold plate 1 through their respective return pipes 3 and water supply pipes 6.

[0051] The process of indoor cooling achieved by the cold wall system of the utility model using nighttime sky radiation cooling is as follows:

[0052] During the day, the water storage plate 4 absorbs indoor and outdoor heat and heats the liquid working medium 401; at night, the heated liquid working medium 401 enters the internal flow channel of the night sky radiation cooling plate 1 from the return pipe 3 under the driving action of the water pump 2. The night sky radiation cooling plate 1 absorbs the heat of the liquid working medium 401 in the water storage plate 4 and releases the heat by long-wave radiation; the liquid working medium 401 flowing through the night sky radiation cooling plate 1 is cooled and then returns to the water storage plate 4 through the water supply pipe 6 to be heated again. The above process is repeated, and the liquid working medium 401 circulates in the pipeline, absorbing indoor and outdoor heat during the day and releasing heat at night, reducing the heat load formed by heat transfer of the building wall.

[0053] It should be noted that, since the liquid working medium 401 in the water storage plate 4 has a large heat capacity, it can also play a role of heat preservation to a certain extent. Therefore, a certain heat preservation effect can be achieved through the water storage plate 4 in winter.

[0054] The utility model uses a cold wall system for night sky radiation cooling. A water storage plate is provided on the inner side of the wall. The water storage plate has a cavity for storing liquid working fluid inside. The water storage plate is connected to both ends of the internal pipeline of the night sky radiation cooling plate through supply and return pipes. The absorbed indoor and outdoor heat is stored by a heat-carrying working fluid and transmitted to the roof night sky radiation cooling plate. The night sky radiation cooling plate is used to cool the liquid working fluid, and the liquid working fluid is circulated in the loop to achieve heat dissipation of the liquid working fluid in the water storage plate, which effectively reduces the heat load formed by heat transfer of the building wall, reduces the use of air conditioning or heating, and reduces energy consumption. At the same time, the liquid working fluid has a large heat capacity and can absorb a large amount of indoor and outdoor heat, thereby reducing indoor temperature fluctuations, achieving a certain cooling effect, and improving indoor comfort. The utility model has significant application potential in energy saving and consumption reduction, environmental protection, and comfort improvement in the construction field.

[0055] In addition, in winter, the heat storage capacity of the liquid heat carrier can be used to reduce indoor temperature fluctuations and reduce indoor heat loss, thereby achieving energy-saving and heat preservation effects. The utility model can meet the needs of the cooling mode in summer and the heat preservation mode in winter.

[0056] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cold wall system utilizing nighttime sky radiation cooling, characterized in that: include: The water storage plate is arranged on the inner side of the wall and contains liquid working medium inside, which is used to absorb indoor and outdoor heat during the day; A nighttime sky radiation cooling panel is provided on the roof and is used to cool the liquid working medium input from the water storage panel and absorbing the indoor and outdoor heat; The circulation pipeline is used to connect the water storage plate and the night sky radiation cooling plate, transfer the heat absorbed by the water storage plate to the night sky radiation cooling plate on the roof for heat dissipation through the circulation of liquid working medium, and transfer the cooled liquid working medium to the water storage plate.

2. The cold wall system using night sky radiation cooling according to claim 1, characterized in that: The surface of the nighttime sky radiation cooling panel has a radiation cooling material, and the radiation cooling material is a coating or a film.

3. The cold wall system using night sky radiation cooling according to claim 1, characterized in that: The night sky radiation cooling panel is a plate structure containing a cavity, and a plurality of partitions are arranged in the plate structure to divide the interior of the night sky radiation cooling panel into a plurality of flow channels; or, The nighttime sky radiation cooling panel is an embedded tubular assembly structure, and its internal pipes are a series structure or a parallel structure to form a plurality of flow channels.

4. The cold wall system using night sky radiation cooling according to any one of claims 1 to 3, characterized in that: The water storage plate comprises a metal thin splint shell, and a liquid working medium is contained in an internal cavity of the metal thin splint shell.

5. The cold wall system using night sky radiation cooling according to claim 4, characterized in that: A plurality of transverse internal support structures of the metal sandwich plate are also arranged inside the metal sandwich plate shell to support the heat exchange surfaces of the metal sandwich plate shell on both sides thereof.

6. The cold wall system using night sky radiation cooling according to any one of claims 1 to 3 or 5, characterized in that: The water storage plate is a prefabricated flat plate structure as a whole.

7. The cold wall system using night sky radiation cooling according to any one of claims 1 to 3 or 5, characterized in that: The circulation pipeline includes a water supply pipe and a water return pipe; One end of the water return pipe is connected to the water outlet of the water storage plate, and the other end is connected to the water inlet of the night sky radiation cooling plate; One end of the water supply pipe is connected to the water outlet of the night sky radiation cooling plate, and the other end is connected to the water inlet of the water storage plate.

8. The cold wall system using nighttime sky radiation cooling according to claim 7, characterized in that: The water return pipe and / or the water supply pipe is provided with a water pump.

9. The cold wall system using nighttime sky radiation cooling according to claim 7, characterized in that: The water outlet of the water storage plate is arranged at the top thereof, and the water inlet of the water storage plate is arranged at the bottom thereof.

10. The cold wall system using night sky radiation cooling according to claim 7, characterized in that: Each wall is provided with a corresponding water storage plate on the inner side, which is cold-connected to the same night sky radiation cooling plate through the circulation pipeline, or, A corresponding water storage plate is provided on the inner side of each wall, which is connected to the corresponding night sky radiation cooling plate through the circulation pipeline.

Images