Floor radiant heating system combining solar heat pipe and cascade heat storage device

Abstract

The utility model discloses a floor radiation heating system combining a solar heat pipe and a cascade heat storage device. The floor radiation heating system comprises an L-shaped flat plate heat pipe, a first-stage phase change heat storage device, a second-stage phase change heat storage device and a water supply pipe. The flat heat pipe comprises an evaporation section and a condensation section, the sunny side of the evaporation section is coated with a heat absorption coating, and a first-stage phase change heat storage device composed of a first-stage phase change heat storage material and a heat preservation shell is arranged on the shady side of the evaporation section; the condensation section is obliquely arranged on the floor, so that a working medium in the condensation section generates condensation backflow; a plurality of secondary phase change heat storage devices which are filled with secondary phase change heat storage materials and are packaged with the secondary phase change heat storage materials are uniformly arranged on the two sides of the condensation section according to preset intervals, and the water supply pipes are wound around the secondary phase change heat storage devices. The heating system is simple in structure and low in energy consumption, solar energy and hot water are combined to supply heat according to needs, the heat release time of floor heating is effectively prolonged, the energy utilization rate and the energy storage effect are improved, and the heating cost is saved.

Description

Technical Field

[0001] The utility model relates to the field of heating systems, in particular to a floor radiation heating system combining a solar heat pipe and a stepped heat storage device. Background Art

[0002] At present, most of the heating floors on the market use hot water circulation heating, and use clean energy such as solar energy combined with hot water heating to reduce the energy consumption of floor radiant heating systems. However, solar energy cannot achieve the matching of heat use in space and time. The use of phase change energy storage system can effectively solve this problem. However, the heat transfer efficiency in the phase change energy storage system will directly affect the energy utilization efficiency. However, the above heating system has the following problems: First, the energy consumption of hot water heating is high; second, combined with solar energy heating, the excess heat cannot be stored, resulting in reduced heat utilization efficiency; third, the traditional solar hot water heating system uses solar energy to heat, produce hot water, and then transport it to floor heating. The structure is complex and the energy utilization rate is low; fourth, the commonly used phase change thermal storage material has a low thermal conductivity and a long heat storage and release time. Utility Model Content

[0003] The utility model provides a floor radiation heating system combining a solar heat pipe and a stepped heat storage device, which solves the technical problems of high energy consumption and low energy utilization rate of the existing heating system.

[0004] The utility model provides a floor radiation heating system combining a solar heat pipe and a cascade heat storage device, comprising: an L-shaped flat plate heat pipe, a primary phase change heat storage device, a secondary phase change heat storage device and a water supply pipe;

[0005] The L-shaped flat plate heat pipe comprises an evaporation section and a condensation section, and the interior of the L-shaped flat plate heat pipe is filled with a working medium;

[0006] The evaporation section is laid on the outer wall facing the sun;

[0007] The outer sun-facing surface of the evaporation section is coated with a heat-absorbing paint, and the outer sun-facing surface of the evaporation section is arranged with the primary phase-change heat storage device;

[0008] The primary phase change heat storage device is composed of a primary phase change heat storage material and a heat insulation shell;

[0009] The condensing section is tilted on the floor so that the working medium inside the condensing section is condensed and refluxed;

[0010] The plurality of secondary phase-change heat storage devices are evenly arranged at both sides of the condensing section according to a preset interval, and the water supply pipe is arranged around the secondary phase-change heat storage device;

[0011] The secondary phase-change heat storage device uses ceramsite as a matrix, and is filled and encapsulated with a secondary phase-change heat storage material.

[0012] Preferably, it also includes: a transparent heat-insulating cover, which is sleeved on the outside of the heat-absorbing coating and the first-level phase-change heat storage device to ensure the normal working state of the evaporation section.

[0013] Preferably, the heat absorbing material is a black heat absorbing material.

[0014] Preferably, the thermal insulation shell is made of foam material.

[0015] Preferably, the phase change temperature of the primary phase change thermal storage material is greater than the phase change temperature of the secondary phase change thermal storage material.

[0016] Preferably, the inclination angle range of the condensation section is preferably within 10 degrees.

[0017] Preferably, the secondary phase-change heat storage device is preferably a spherical structure, and the secondary phase-change heat storage device is preferably encapsulated by epoxy resin.

[0018] Preferably, the phase change latent heat of the secondary phase change thermal storage device is greater than 200 kJ / kg, and the diameter is preferably 25 mm.

[0019] Preferably, the phase change temperature range of the secondary phase change thermal storage material is preferably 30°C to 40°C.

[0020] Preferably, the phase change heat storage material is any one of an inorganic phase change heat storage material, an organic phase change heat storage material and a composite phase change heat storage material.

[0021] It can be seen from the above technical solutions that the utility model has the following advantages:

[0022] 1. By adding L-shaped flat heat pipes to floor heating, the flat heat pipes have excellent heat transfer performance, can improve the storage efficiency of the heating system, and use heat-absorbing coatings to absorb solar energy to use solar energy to provide heat, reduce heating energy consumption, and thus solve the problem of high energy consumption of hot water heating.

[0023] 2. The secondary phase change heat storage device uses expanded clay as the matrix, is filled with secondary phase change heat storage material, and uses phase change heat storage balls encapsulated with epoxy resin. It has high phase change latent heat, occupies a small area, has excellent sealing and stability, and is not easy to leak.

[0024] 3. Use L-shaped heat storage flat plate heat pipe, arrange a first-level phase change heat storage device on the shady side of the evaporation section of the flat plate heat pipe, and then use the evaporation section to absorb and store solar heat, and release heat to the floor laying material or energy storage system when needed, so as to extend the daytime heat release time, reduce the loss of heat generated by solar energy, and save heating costs. Compared with the traditional combined solar water heating system, the system structure is simple, occupies a small area, and saves costs.

[0025] 4. Set up a primary phase change heat storage device and a secondary phase change heat storage device to form a cascade heat storage device to achieve cascade transfer of heat absorption and release, and improve the energy efficiency and energy saving of the heating system; the primary phase change heat storage device can effectively absorb the solar heat transferred by the flat heat pipe, thereby extending the heat release time of floor heating during the day or night. When there is no solar energy at night or during the day, if the indoor temperature is low, the phase change heat storage material can release heat first, combined with hot water heating, improve energy utilization and energy storage effect, reduce energy consumption, and save heating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 A schematic diagram of the installation of an L-shaped flat plate heat pipe of a floor radiant heating system combining a solar heat pipe and a stepped heat storage device provided in the present application;

[0028] Figure 2 An enlarged schematic diagram of the evaporation section of an L-shaped flat plate heat pipe of a floor radiant heating system combining a solar heat pipe and a stepped heat storage device provided in the present application;

[0029] Figure 3 A schematic diagram of floor heating installation of a floor radiant heating system combining solar heat pipes and a stepped heat storage device provided in the present application;

[0030] Among them, the accompanying drawings are marked as: floor 1, floor heating 2, flat heat pipe 3, evaporation section 31, condensation section 32, heat-absorbing coating 4, primary phase change heat storage device 5, primary phase change heat storage material 51, insulation shell 52, transparent insulation cover 6, secondary phase change heat storage device 7 and water supply pipe 8. DETAILED DESCRIPTION

[0031] The embodiment of the utility model provides a floor radiation heating system combining solar heat pipes and a stepped heat storage device, which is used to solve the technical problems of high energy consumption and low energy utilization rate of the existing heating system.

[0032] In order to make the utility model's purpose, features, and advantages more obvious and easy to understand, the following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the embodiments described below are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0035] See also Figure 1-Figure 3 , an embodiment of a floor radiant heating system combining a solar heat pipe and a cascade heat storage device provided in the present application comprises: an L-shaped flat plate heat pipe 3, a primary phase change heat storage device 5, a secondary phase change heat storage device 7 and a water supply pipe 8;

[0036] The L-shaped flat plate heat pipe 3 includes an evaporation section 31 and a condensation section 32, and the interior of the L-shaped flat plate heat pipe 3 is filled with a working medium;

[0037] The evaporation section 31 is laid on the outer wall facing the sun; the outer sun-facing surface of the evaporation section 31 is coated with a heat-absorbing coating 4, and the outer shady surface of the evaporation section 31 is arranged with a primary phase-change heat storage device 5; the primary phase-change heat storage device 5 is composed of a primary phase-change heat storage material 51 and a heat-insulating shell 52;

[0038] The condensation section 32 is tilted on the floor so that the working medium inside the condensation section 32 produces condensation reflux; multiple secondary phase change heat storage devices 7 are evenly arranged on both sides of the condensation section 32 according to a preset interval, and the water supply pipe 8 is arranged around the secondary phase change heat storage device 7; the secondary phase change heat storage device 7 uses expanded clay as a matrix, and is filled and encapsulated with a secondary phase change heat storage material.

[0039] It should be noted that the flat plate heat pipe 3 has extremely strong heat transfer performance, making heat exchange more efficient, wherein there are no special requirements for the working fluid filled inside the L-shaped flat plate heat pipe 3;

[0040] In actual installation, the evaporation section 31 of the L-shaped flat heat pipe 3 can be laid on an exterior wall with sufficient sunlight, and the connection between the upper and lower floors 1 of the house can be used to absorb solar energy; a primary phase change heat storage device 5 is arranged on the outside of the evaporation section 31 facing the shaded side, which is used to release the stored heat to enable the L-shaped flat heat pipe 3 to continue working when the solar energy is low or it is cloudy and the flat heat pipe 3 cannot work normally, thereby realizing the step-by-step transfer of heat and extending the heat release time;

[0041] In order to reduce the room temperature fluctuation, make the heating law more uniform, and make the heat distribution more reasonable, and reduce the adverse effects of heat source fluctuations, the secondary phase change heat storage device 7 and the condensation section 32 are laid in the floor heating 2. The secondary phase change heat storage device 7 is evenly arranged according to the preset spacing, and a convenient heat storage and transfer channel is established. The secondary phase change heat storage device 7 is used to store the heat released by the condensation section 32, so that the heating system releases heat on demand, improves the heating efficiency, avoids a large amount of excess heat from being transferred into the room, and reduces the room temperature fluctuation; at night or during the day when the solar energy is low, if the indoor temperature is low, the secondary phase change heat storage device 7 can release heat first, and then combine with hot water for heating, so as to reduce energy consumption; wherein, the preset spacing can be set according to the actual laying situation and laying effect of the floor heating 2;

[0042] A primary phase-change heat storage device 5 and a secondary phase-change heat storage device 7 are provided to form a stepped heat storage device, which has a good effect in heat storage and release. Specifically, in heat storage, when the evaporation section of the flat heat pipe 3 absorbs more heat, the primary phase-change heat storage device 5 can store excess heat, while the secondary phase-change heat storage device 7 is used to store the heat released by the condensation section to avoid a large amount of heat being transferred into the room, thereby ensuring that the heat generated by the flat heat pipe 3 at different stages can be effectively stored, thereby achieving stepped heat storage. In heat release, when the absorbable solar energy from the outside is low, the primary phase-change heat storage device 5 releases heat first, so that the flat heat pipe 3 continues to work and prolongs the heat release time. When the indoor temperature is low, the secondary phase-change heat storage device 7 can release heat, and then the heating effect is further improved by hot water heating. In this way, the stepped heat storage device can selectively release heat according to actual needs and environmental conditions, while ensuring indoor comfort without causing energy waste.

[0043] The secondary phase change heat storage device 7, the heat pipe condensation section 32 and the water supply pipe 8 of the floor heating 2 are evenly arranged together, and the primary phase change heat storage material 51 is also arranged outside the evaporation section 31 of the flat heat pipe 3, which together form a solar energy and hot water energy storage floor radiation heating system. The phase change heat storage material can absorb and release the solar energy heat transmitted by the flat heat pipe 3, combine the heating effects of solar energy and hot water, reduce heating energy consumption, and improve energy utilization.

[0044] In a preferred embodiment, it also includes: a transparent heat-insulating cover 6, which is sleeved on the outside of the heat-absorbing coating 4 and the primary phase-change heat storage device 5, and is used to ensure the normal working state of the evaporation section 31.

[0045] It should be noted that, in order for the flat plate heat pipe 3 to work properly, the evaporation section 31 of the flat plate heat pipe 3 exposed on the exterior wall needs to be covered with a transparent heat preservation cover 6 to ensure the normal operation of the flat plate heat pipe 3 when the temperature is low.

[0046] In a preferred embodiment, the heat absorbing material is preferably a black heat absorbing material.

[0047] Since the outdoor temperature is low and the solar energy is weak in winter, the evaporation section 31 of the flat heat pipe 3 uses a black heat-absorbing paint 4 to absorb solar energy, which can convert the solar energy into the heat required for evaporation of the flat heat pipe 3 as much as possible.

[0048] In a preferred embodiment, the insulation shell 52 is preferably made of foam material.

[0049] It should be noted that the insulation shell 52 is made of foam material, which can prevent the primary phase change heat storage material 51 from radiating heat to the rear, reduce heat loss, and play an effective role in thermal insulation; in addition, the insulation shell 52 made of foam material, on the one hand, will not increase the weight burden of the flat heat pipe 3 and is easy to install, and on the other hand, it can save the cost of the heating structure.

[0050] In a preferred embodiment, the phase change temperature of the primary phase change thermal storage material 51 is greater than the phase change temperature of the secondary phase change thermal storage material.

[0051] In a preferred embodiment, the inclination angle of the condensation section 32 is preferably within 10 degrees.

[0052] In this preferred embodiment, the condensing section 32 of the flat-plate heat pipe 3 needs to be tilted at an angle of less than 10° so that the working fluid inside the flat-plate heat pipe 3 can naturally condense and reflux, making the heat exchange more efficient; in actual installation, considering that the working fluid inside the flat-plate heat pipe 3 needs to condense and reflux, and the height limitation of the floor structure, the heat pipe condensing section 32 needs to be tilted at a certain small angle, which can be achieved by fixing a wooden block of appropriate size and height on the condensing section 32. The height difference between the high and low ends of the condensing section 32 is installed in a small range and will not affect normal installation.

[0053] In a preferred embodiment, the secondary phase-change heat storage device 7 is preferably a spherical structure, and the secondary phase-change heat storage device 7 is preferably encapsulated with epoxy resin.

[0054] It can be understood that the spherical structure of the secondary phase change heat storage device 7 can achieve more uniform heat transfer and distribution. At the same time, the epoxy resin encapsulation of the secondary phase change heat storage device 7 can effectively ensure the stability and sealing of the secondary phase change heat storage device 7.

[0055] In a preferred embodiment, the phase change latent heat of the secondary phase change heat storage device 7 is greater than 200 kJ / kg, and the diameter is preferably 25 mm.

[0056] In a preferred embodiment, the phase change temperature range of the secondary phase change thermal storage material is preferably 30°C to 40°C.

[0057] In a preferred embodiment, the phase change thermal storage material is preferably any one of an inorganic phase change thermal storage material, an organic phase change thermal storage material and a composite phase change thermal storage material.

[0058] In order to reduce the mismatch between space and time during heat transfer, realize heat distribution on demand, extend the heat release time, improve heat utilization, and save heating costs, different phase change heat storage materials need to be used in the secondary phase change heat storage device 7 and the primary phase change heat storage device 5 arranged in the evaporation section 31 of the flat heat pipe 3 to store and release heat.

[0059] The floor radiant heating system provided by the utility model has a simple structure, a simple installation method and a good heating effect; the heating system comprises an L-shaped flat heat pipe, a primary phase change heat storage device, a secondary phase change heat storage device and a water supply pipe; wherein the heating system has the following beneficial effects:

[0060] 1. The evaporation section of the flat heat pipe is coated with heat-absorbing materials, which can effectively absorb solar energy to improve the working efficiency of the flat heat pipe;

[0061] 2. The secondary phase change heat storage device uses ceramsite as the matrix, filled with secondary phase change heat storage material, and uses phase change heat storage balls encapsulated by epoxy resin. It has high phase change latent heat, small occupied area, excellent sealing, stability and heat storage effect, and is not easy to leak;

[0062] 3. A primary phase-change heat storage device and a secondary phase-change heat storage device are set up to form a cascade heat storage device, which can effectively absorb the solar heat transferred by the flat heat pipe. At night or during the day when there is no solar energy, if the indoor temperature is low, the phase-change heat storage material can release heat first, and achieve cascade distribution of heat on demand, thereby extending the heat release time of floor heating during the day or at night, improving energy utilization and energy storage effect, saving heating costs, preventing excessive fluctuations in indoor temperature, and enhancing indoor comfort;

[0063] 4. The phase-change heat storage ball and the condensing section of the flat heat pipe are laid in the floor heating. The spherical structure transfers heat evenly and establishes a convenient channel for heat storage and transfer, making the floor heating structure more compact, the heat exchange more efficient, and the temperature rise more even;

[0064] 5. Use L-shaped heat storage flat plate heat pipe, arrange a first-level phase change heat storage material on the shady side of the heat pipe evaporation section, use the heat pipe evaporation section to absorb and store solar heat, release heat to the floor laying material when needed, extend the daytime heat release time, reduce the loss of heat generated by solar energy, and save heating costs. Compared with the traditional combined solar water heating system, the system structure is simple and occupies a small area.

[0065] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A floor radiant heating system combining solar heat pipes and cascade heat storage devices, characterized in that: include: L-shaped flat plate heat pipe, a primary phase change heat storage device, a secondary phase change heat storage device and a water supply pipe; The L-shaped flat plate heat pipe comprises an evaporation section and a condensation section, and the interior of the L-shaped flat plate heat pipe is filled with a working medium; The evaporation section is laid on the outer wall facing the sun; The outer sun-facing surface of the evaporation section is coated with a heat-absorbing paint, and the outer sun-facing surface of the evaporation section is arranged with the primary phase-change heat storage device; The primary phase change heat storage device is composed of a primary phase change heat storage material and a heat insulation shell; The condensing section is tilted on the floor so that the working medium inside the condensing section is condensed and refluxed; The plurality of secondary phase-change heat storage devices are evenly arranged at both sides of the condensing section according to a preset interval, and the water supply pipe is arranged around the secondary phase-change heat storage device; The secondary phase-change heat storage device uses ceramsite as a matrix, and is filled and encapsulated with a secondary phase-change heat storage material.

2. The floor radiant heating system according to claim 1, characterized in that: Also includes: A transparent heat-insulating cover is sleeved on the outside of the heat-absorbing coating and the primary phase-change heat storage device to ensure the normal working state of the evaporation section.

3. The floor radiant heating system according to claim 1, characterized in that: The heat absorbing coating is specifically a black heat absorbing material.

4. The floor radiant heating system according to claim 1, characterized in that: The heat-insulating shell is specifically made of foam material.

5. The floor radiant heating system according to claim 1, characterized in that: The phase change temperature of the primary phase change thermal storage material is greater than the phase change temperature of the secondary phase change thermal storage material.

6. The floor radiant heating system according to claim 1, characterized in that: The inclination angle range of the condensation section is within 10 degrees.

7. The floor radiant heating system according to claim 1, characterized in that: The secondary phase-change heat storage device is specifically a spherical structure, and the secondary phase-change heat storage device is specifically epoxy resin packaged.

8. The floor radiant heating system according to claim 1, characterized in that: The phase change latent heat of the secondary phase change heat storage device is greater than 200 kJ / kg, and the diameter is specifically 25 mm.

9. The floor radiant heating system according to claim 1, characterized in that: The phase change temperature range of the secondary phase change thermal storage material includes 30°C to 40°C.

10. The floor radiant heating system according to claim 1, characterized in that: The phase change thermal storage material is specifically any one of an inorganic phase change thermal storage material, an organic phase change thermal storage material and a composite phase change thermal storage material.

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