Hollow floating heat preservation top cover for cross-seasonal water body heat storage and application method

Abstract

The invention relates to the technical field of cross-seasonal heat storage / heat supply design and construction, and discloses a hollow floating heat preservation top cover for cross-seasonal water body heat storage and an application method.The hollow floating heat preservation top cover comprises a plurality of heat preservation modules which are connected and fixed through flexible connecting mechanisms; each flexible connecting mechanism comprises a reserved hole formed in the side wall of the corresponding heat preservation module, the cross section of each heat preservation module is rectangular, the heat preservation top cover is composed of the multiple independent heat preservation modules, each module comprises the waterproof layer, the heat preservation layer and the air space layer, and due to the design, transportation, storage and on-site assembly are facilitated; from a single module to the whole top cover, from factory manufacturing and transportation to on-site construction and installation, convenience is achieved, use of manpower resources is reduced, installation can be fast, the construction progress is accelerated, and the heat preservation module has the advantages of being high in practicability and efficient in heat preservation.

Description

Technical Field

[0001] The invention relates to the technical field of cross-seasonal heat storage / heat supply design and construction, and specifically to a hollow floating thermal insulation top cover for cross-seasonal water body heat storage and an application method. Background Art

[0002] A large part of global energy consumption is used for building heating. In order to reduce dependence on traditional fossil energy and achieve net zero emissions, waste heat recovery systems are receiving more and more attention and utilization. However, the utilization of waste heat resources faces three problems: time, space, and quality mismatch. Inter-seasonal heat storage devices can fully and effectively recover waste heat throughout the year and balance the time mismatch between waste heat and heating load. Inter-seasonal heat storage recycles and utilizes waste heat from various heat sources throughout the year through peak regulation, and adjusts the temperature required by heat users. Through inter-seasonal heat storage technology, these energies can be used efficiently and energy supply and demand matching can be achieved.

[0003] Water pit thermal energy storage is currently the most commonly used technology for large-scale seasonal heat storage. It is in the form of storing hot water in natural or excavated pits and keeping it underground. The top and sides of the hot water pool are usually covered with insulation to reduce heat loss. Due to the long storage period, the insulation device plays a key role. At present, the design and construction of the insulation cover is still the biggest challenge in the construction of water pit energy storage, because it will produce unnecessary heat loss (accounting for 60% of the total heat loss), which will lead to accidents in the worst case, and account for a large part of the investment.

[0004] As an important component of pit energy storage, the insulation roof must be considered for both insulation and air permeability. Therefore, it is challenging to correctly configure and install the cover with an insulation layer. In order to avoid expensive structural systems, the insulation roof is floated on the water, which further increases the test of the insulation roof. It is not only about the selection of insulation materials, but also the construction and overall design. Therefore, designing a low-cost, low-investment, and high-efficiency insulation roof is an urgent need for cross-seasonal heat storage technology. Summary of the invention

[0005] The object of the present invention is to provide a modular hollow floating thermal insulation top cover for cross-seasonal water heat storage, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a hollow floating thermal insulation top cover for cross-seasonal water heat storage, comprising a plurality of thermal insulation modules, wherein the plurality of thermal insulation modules are connected and fixed by a flexible connection mechanism, wherein the flexible connection mechanism comprises a reserved hole opened on the side wall of the thermal insulation module, wherein the cross-section of the thermal insulation module is rectangular, wherein the reserved hole is arranged in the middle position of the side wall of the thermal insulation module and the reserved holes are respectively arranged around the thermal insulation module, wherein the openings of the reserved holes are respectively arranged on the side wall and the upper wall of the thermal insulation module, wherein a connecting rope is interspersed in the reserved holes between adjacent thermal insulation modules, wherein the head and tail ends of the connecting rope are fixedly connected by a lead seal, so as to ensure a close fit between the thermal insulation modules to reduce heat loss, while allowing a certain amount of movement space to adapt to changes in the water surface, wherein the thermal insulation module comprises a waterproof layer, a thermal insulation layer and an air interlayer, wherein the waterproof layer is arranged to cover the outside of the thermal insulation layer and the air interlayer, and the thermal insulation layer is arranged at the upper end of the air interlayer.

[0007] According to the above technical solution, the waterproof layer is configured as a geomembrane to provide a waterproof effect to the thermal insulation layer.

[0008] According to the above technical solution, the insulation layer is arranged from top to bottom in sequence as expandable polystyrene board, polyurethane insulation board and extruded insulation board. The multi-layer insulation structure is combined together to provide efficient thermal insulation performance, which can effectively reduce the heat loss of water body.

[0009] According to the above technical solution, the air interlayer is configured as a high-density polyethylene board and the air interlayer is configured as a hollow structure, which not only has the effect of heat preservation and heat insulation, but also has the effect of floating and bearing weight.

[0010] The method for applying a hollow floating thermal insulation top cover for cross-seasonal water body heat storage comprises the following steps: S1, preparation: determine the maximum outer dimensions of the insulation top cover and the number of insulation modules required for the insulation top cover according to the upper opening size of the hot water storage body; S2, thickness determination: the optimum thickness of the insulation material and the air layer in the insulation layer is calculated based on the heat transfer limit, or determined based on the thermal stratification characteristics of the hot water storage body simulated by the software; S3, formal laying: After the soil on site is surveyed and compacted and the hot water storage body is injected, the insulation module is laid; S4, module connection: Use connecting ropes and lead seals to firmly connect all insulation modules into one to form a complete insulation top cover; S5, Inspection and Acceptance: Conduct a comprehensive inspection to ensure that the connection is tight, the fixation is reliable, the appearance is intact, and it meets the design requirements and technical standards.

[0011] Compared with the prior art, the beneficial effects achieved by the present invention are: (1) Modular design: The thermal insulation roof is composed of multiple independent thermal insulation modules. Each module contains a waterproof layer, a thermal insulation layer and an air layer. This design is convenient for transportation, storage and on-site assembly. From a single module to an overall roof, from factory production and transportation to on-site construction and installation, it is relatively convenient, reducing the use of human resources, and can be quickly installed, speeding up the construction progress; (2) Flexible connection mechanism: The insulation modules are connected through reserved holes and connecting ropes and fixed with lead seals, which ensures a close fit between the modules and reduces heat loss at the connection. At the same time, a certain amount of movement space is allowed to adapt to changes in the water surface, thereby enhancing the flexibility and adaptability of the system. (3) Hollow structure and floating function: The air interlayer is constructed of high-density polyethylene (HDPE) board with a hollow structure inside, which not only provides good thermal insulation effect, reduces heat loss at the top of the hot water storage body, improves the heat storage efficiency of the hot water storage body, but also gives the top cover the ability to float, reduces the need for complex supporting structures, and reduces the total cost of insulation materials; (4) Multi-layer insulation structure: Expandable polystyrene board, polyurethane insulation board and extruded insulation board are arranged in sequence from top to bottom to form an efficient thermal insulation barrier, effectively reducing heat loss; (5) High waterproofness: The outermost geomembrane waterproof layer not only prevents moisture from penetrating and affecting the performance of the insulation material, but also enhances the weather resistance and anti-aging ability of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a three-dimensional schematic diagram of the present invention; Figure 2 is a first stereoscopic schematic diagram of the flexible connection mechanism of the present invention; Figure 3 is a second stereoscopic schematic diagram of the flexible connection mechanism of the present invention; Figure 4 It is a three-dimensional schematic diagram of a single thermal insulation module of the present invention; Figure 5 It is a three-dimensional schematic diagram of the connecting rope and the lead seal of the present invention; In the figure: 1-insulation module, 11-waterproof layer, 12-insulation layer, 121-expandable polystyrene board, 122-polyurethane insulation board, 123-extruded insulation board, 13-air layer, 2-reserved hole, 3-connecting rope, 4-lead seal. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] See also Figure 1-5 The present invention provides a technical solution: a hollow floating heat-insulating top cover for cross-seasonal water heat storage, comprising a plurality of heat-insulating modules 1, wherein the plurality of heat-insulating modules 1 are connected and fixed by a flexible connection mechanism, wherein the flexible connection mechanism comprises a reserved hole 2 opened on the side wall of the heat-insulating module 1, wherein the cross-section of the heat-insulating module 1 is rectangular, wherein the reserved hole 2 is arranged in the middle position of the side wall of the heat-insulating module 1 and the reserved holes 2 are respectively arranged around the heat-insulating module 1, and the openings of the reserved holes 2 are respectively opened on the side wall of the heat-insulating module 1 and upper wall, the reserved holes 2 between adjacent insulation modules 1 are interspersed with connecting ropes 3, the head and tail ends of the connecting ropes 3 are fixedly connected by lead seals 4, so as to ensure the close fit between the insulation modules 1 to reduce heat loss, while allowing a certain amount of movement space to adapt to changes in the water surface, the insulation module 1 includes a waterproof layer 11, an insulation layer 12 and an air layer 13, the waterproof layer 11 is arranged outside the insulation layer 12 and the air layer 13, and the insulation layer 12 is arranged on the upper end of the air layer 13; The modular hollow floating thermal insulation top cover is composed of a plurality of thermal insulation modules 1, which are fixed to each other through a flexible connection mechanism. A reserved hole 2 is provided in the middle of the side wall of each thermal insulation module 1, and reserved holes 2 are distributed all around. This layout ensures that the connecting rope 3 can evenly pass through each thermal insulation module 1, thereby achieving a stable connection between the thermal insulation modules 1. The reserved holes 2 between adjacent thermal insulation modules 1 are interspersed with connecting ropes 3. The design of the connecting rope 3 not only ensures a close fit between the thermal insulation modules 1 and reduces the possibility of heat loss, but also allows a certain amount of movement space to adapt to changes in the water surface. In order to ensure the safety and reliability of the connection, the lead seal 4 is used to fix the head and tail ends of the connecting rope 3 through the lead seal 4. This method simplifies the installation process and facilitates subsequent maintenance or adjustment. This flexible connection method enables the entire thermal insulation top cover to have a certain degree of flexibility while maintaining structural integrity, and can be adjusted with changes in the water surface, avoiding stress concentration problems caused by rigid connections and extending service life. Specifically, the waterproof layer 11 is configured as a geomembrane to provide a waterproof effect to the thermal insulation layer 12; The waterproof layer 11 is made of geomembrane material and is wrapped around the outside of the insulation layer 12 and the air layer 13. This design not only provides comprehensive waterproof protection to prevent moisture from penetrating into the insulation material and affecting its thermal insulation performance and service life, but also enhances the weather resistance and anti-aging ability of the overall structure. At the same time, it can simplify the transportation and on-site construction process. Since the geomembrane is light and easy to fold, the wrapped insulation layer 12 occupies less space during transportation, reduces logistics costs, and reduces the risk of damage during loading and unloading. During on-site installation, since the geomembrane has been pre-wrapped, workers only need to lay the insulation module 1 in place according to the design requirements without additional waterproofing treatment, which greatly improves the construction efficiency. In addition, the good flexibility of the geomembrane also allows it to adapt to foundation surfaces of different shapes, ensuring a good fit. Specifically, the insulation layer 12 is sequentially arranged from top to bottom as an expandable polystyrene board 121, a polyurethane insulation board 122, and an extruded insulation board 123. The multi-layer insulation structure is combined together to provide efficient heat insulation performance, which can effectively reduce the heat loss of the water body; The insulation layer 12 is provided with three different insulation materials from top to bottom to form an efficient insulation barrier. The expandable polystyrene board 121 is located at the top layer, providing a preliminary insulation effect and having good compressive strength. The expandable polystyrene board 121 is widely used in building insulation and other fields due to its light weight and high insulation performance. The polyurethane insulation board 122 is located in the middle layer, and further enhances the thermal resistance value of the entire system due to its excellent insulation performance. The polyurethane material also has good waterproof and moisture-proof performance, which helps to maintain a dry environment for the insulation system. The extruded insulation board 123 is located at the bottom layer. In addition to providing additional insulation, it also has excellent waterproof performance and is an ideal material for underground or water applications. The high strength and low water absorption rate of the extruded insulation board 123 make it an ideal choice for long-term immersion environments. The three layers of insulation materials are combined to form an efficient insulation barrier, which can significantly reduce the heat loss of the water body and ensure that the hot water storage body can maintain a suitable temperature in different seasons. Specifically, the air interlayer 13 is a high-density polyethylene board and the air interlayer 13 is a hollow structure, which not only has the effect of heat insulation, but also has the effect of floating and bearing. The air interlayer 13 is one of the important components of the thermal insulation module 1. It is composed of a high-density polyethylene board (HDPE) and has a hollow structure inside. The hollow structure is filled with air. The low density of air is used to make the entire top cover float easily on the water. This design simplifies the traditional support structure requirements because there is no need to build a complex frame to maintain the position of the top cover. In contrast, traditional methods may involve a large amount of metal or other materials to build a solid foundation structure to ensure that the top cover is stably covered above the water body. After adopting the hollow structure, it is only necessary to ensure that the connections between the modules are firm, which greatly reduces material consumption and construction difficulty, thereby significantly reducing construction costs. The advantages of this design are: Thermal insulation: Air itself is an excellent insulator. The existence of the air interlayer greatly improves the overall thermal insulation effect. The air in the hollow structure is still, which effectively prevents heat conduction and further enhances the thermal insulation performance; Floating load-bearing: The hollow structure not only reduces the weight of the insulation cover, but also provides the necessary buoyancy and support capacity, so that the insulation cover can float stably on the water and withstand a certain amount of external pressure. In addition, the high-density characteristics of the HDPE material give the air interlayer better mechanical strength and increase the durability of the system. The existence of the hollow structure also indirectly promotes the optimization of the cost of insulation materials. On the one hand, it provides a physical barrier for the insulation layer, reduces the impact of external factors (such as humidity and temperature fluctuations) on the insulation material, and maintains a more lasting insulation effect; on the other hand, since there is no need to add thick anti-corrosion coatings or other special treatments, the choice of insulation materials is more flexible and diverse, and more cost-effective products can be selected according to actual needs. In addition, the lightweight hollow structure also helps to reduce the overall weight, facilitates transportation and installation, and further saves related costs; The method for applying a hollow floating thermal insulation top cover for cross-seasonal water body heat storage comprises the following steps: S1, preparation: accurately measure the actual size of the opening on the hot water storage body, and use it as the basic data for designing the insulation cover. Considering the possible irregular shape or special structure of the hot water storage body, reserve a certain margin to ensure that the insulation cover can completely cover the water surface, and its position can be adjusted when necessary. Then, based on the specific parameters of the hot water storage body and the design specifications of the insulation cover, calculate the number of insulation modules 1 required. The size of each insulation module 1 should be convenient for transportation and installation; S2, thickness determination: the most suitable thickness is determined by two methods: heat transfer limit calculation: according to the working temperature range of the hot water storage body and the external environmental conditions, the minimum material thickness required to meet the insulation requirements is calculated using the heat transfer principle; software simulation: with the help of professional simulation software, the thermal stratification phenomenon inside the hot water storage body is simulated, and the changing trend of water temperature at different depths is analyzed; S3, formal laying: Before formally laying the insulation module 1, complete the basic work on the construction site, including but not limited to soil survey and leveling, to ensure that the ground is solid and flat. In addition, the laying operation is started when the hot water storage body is already filled with water, so that the actual liquid level of the water body can be tested and the construction progress can be avoided from being affected by water level fluctuations; S4, module connection: when all the predetermined number of insulation modules 1 are correctly placed, they are firmly connected by connecting ropes 3 and lead seals 4 to form a complete insulation top cover; S5, Inspection and Acceptance: Check whether the connections between the insulation modules 1 are tight and without gaps, and whether there are signs of looseness; test the firmness of the edge fixation to ensure that there are no potential safety hazards; observe the overall appearance quality to confirm that there is no obvious damage or defects.

[0015] Working principle: This modular hollow floating insulation top cover is composed of several insulation modules 1, which are fixed to each other through a unique flexible connection mechanism. A reserved hole 2 is provided in the middle of the side wall of each insulation module 1, and reserved holes 2 are distributed all around. This layout ensures that the connecting rope 3 can pass through each insulation module 1 evenly, so as to achieve a stable connection between the insulation modules 1. The reserved holes 2 between adjacent insulation modules 1 are interspersed with connecting ropes 3. The design of the connecting rope 3 not only ensures the close fit between the insulation modules 1 and reduces the possibility of heat loss, but also allows a certain amount of movement space to adapt to changes in the water surface. In order to ensure the safety and reliability of the connection, the head and tail ends of the connecting rope 3 are fixedly connected by the lead seal 4. This method simplifies the installation process and facilitates subsequent maintenance or adjustment. This flexible connection method enables the entire insulation top cover to have a certain degree of flexibility while maintaining structural integrity, and can be adjusted with changes in the water surface, avoiding stress concentration problems caused by rigid connections and extending service life. When designing the total insulation thickness of the air layer and the insulation material stack, it is necessary to consider the thermal resistance of each layer of material and ensure that the overall thermal resistance meets the design requirements.

[0016] It can be calculated by following the steps below: 1. Calculate the thermal resistance of each layer The thermal resistance (R value) of each layer of material is calculated as: R=d / λ in: R is the thermal resistance (in square meters Kelvin per Watt, ㎡·K / W); d is the thickness of the material (in meters); λ is the thermal conductivity of the material (in Watts per meter Kelvin W / (m·K)) 2. Calculate the thermal resistance of each layer The thickness of the air layer is d1, and the thickness of the insulation material is d2 2.1 Thermal resistance of air layer The calculation formula is: R1=d1 / λair in: R1 is the thermal resistance of the air layer (in square meters Kelvin per Watt, ㎡·K / W); d1 is the thickness of the air layer (in meters); λair is the thermal conductivity of air (in Watts per meter Kelvin W / (m·K)) 2.2 Thermal resistance of insulation materials The calculation formula is: R2=d2 / λmaterial in: R2 is the thermal resistance of the material (in square meters Kelvin per Watt, ㎡·K / W); d2 is the thickness of the material layer (in meters); λmaterial is the thermal conductivity of the material (in Watts per meter Kelvin W / (m·K)) 3. Calculate the total thermal resistance Rtotal is the sum of the thermal resistances of each layer It can be expressed as: Rtotal=R1+R2 Where: R1 and R2 are the thermal resistances of the material layers, calculated according to the above formula Arranging the above formula, we get: Rtotal=d1 / λair+d2 / λmaterial 4. Determine the target thermal conductivity According to the design requirements, determine the required total thermal conductivity Utarget, and then calculate the total insulation thickness based on the total thermal resistance Rtotal: Rtotal=1 / Utarget 5. Solve for total thickness Assuming that the target thermal conductivity is known, after calculating the total thermal resistance, the appropriate thickness of each layer is determined based on the thermal conductivity of each layer material.

[0017] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0018] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hollow floating heat-insulating roof for storing heat in water bodies across seasons, comprising a plurality of heat-insulating modules (1), characterized in that: A plurality of the thermal insulation modules (1) are connected and fixed by a flexible connection mechanism, the flexible connection mechanism comprising a reserved hole (2) provided on the side wall of the thermal insulation module (1), the thermal insulation module (1) having a rectangular cross section, the reserved hole (2) provided in the middle of the side wall of the thermal insulation module (1) and the reserved holes (2) provided around the thermal insulation module (1), the openings of the reserved holes (2) provided on the side wall and the upper wall of the thermal insulation module (1), the reserved holes (2) between adjacent thermal insulation modules (1) ) are interspersed with a connecting rope (3), the head and tail ends of the connecting rope (3) being fixedly connected by a lead seal (4) to ensure that the insulation modules (1) are tightly fitted to reduce heat loss, while allowing a certain amount of movement space to adapt to changes in the water surface. The insulation module (1) comprises a waterproof layer (11), a thermal insulation layer (12) and an air layer (13), the waterproof layer (11) is arranged to cover the thermal insulation layer (12) and the air layer (13), and the thermal insulation layer (12) is arranged on the upper end of the air layer (13).

2. The hollow floating heat-insulating top cover for cross-seasonal water heat storage according to claim 1 is characterized in that: The waterproof layer (11) is configured as a geomembrane, and is used to provide a waterproof effect on the thermal insulation layer (12).

3. The hollow floating heat-insulating top cover for cross-seasonal water heat storage according to claim 1 is characterized in that: The thermal insulation layer (12) is sequentially arranged from top to bottom as an expandable polystyrene board (121), a polyurethane thermal insulation board (122), and an extruded thermal insulation board (123); the multi-layer thermal insulation structure is combined together to provide efficient thermal insulation performance, and can effectively reduce the loss of heat in the water body.

4. The hollow floating heat-insulating roof for cross-seasonal water heat storage according to claim 1 is characterized in that: The air interlayer (13) is provided as a high-density polyethylene board and the air interlayer (13) is provided with a hollow structure, which not only has the effect of heat preservation and insulation, but also has the effect of floating and bearing weight.

5. The method for applying the hollow floating thermal insulation top cover for cross-seasonal water heat storage according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1, preparation: determine the maximum outer dimensions of the insulation top cover and the number of insulation modules (1) required for the insulation top cover according to the size of the upper opening of the water storage body; S2, thickness determination: the optimum thickness of the insulation material and the air interlayer (13) in the insulation layer (12) is calculated based on the heat transfer limit, or is determined based on the thermal stratification characteristics of the hot water storage body simulated by software; S3, formal laying: After the soil on site is surveyed and compacted and the hot water storage body is injected, the insulation module (1) is laid; S4, module connection: using a connecting rope (3) and a lead seal (4) to firmly connect all the insulation modules (1) into one, so as to form a complete insulation top cover; S5, Inspection and Acceptance: Conduct a comprehensive inspection to ensure that the connection is tight, the fixation is reliable, the appearance is intact, and it meets the design requirements and technical standards.

Images