Energy storage type refrigeration device

Abstract

The application discloses a storage energy type refrigeration equipment, which is used for fully utilizing low temperature of an environment where the refrigeration equipment is located and improving energy efficiency of the refrigeration equipment. The equipment comprises a water-cooled refrigeration system (11) and a storage energy system (12). The water-cooled refrigeration system (11) comprises a condenser (111), a compressor (112), an evaporator (113) and a throttling device (114) which are connected through refrigeration pipelines. The storage energy system (12) comprises a gravity heat pipe (121) and a storage energy assembly (122). The storage energy assembly (122) exchanges heat with the condenser (111). An evaporation section of the gravity heat pipe (121) is arranged in the storage energy assembly (122), and a condensation section of the gravity heat pipe (121) is arranged in an outdoor environment where the refrigeration equipment is located.

Description

Technical Field

[0001] This application relates to the field of energy technology, and in particular to energy storage refrigeration equipment. Background Technology

[0002] With the continuous progress of industrialization, the requirements for ambient temperature in industries such as temperature-controlled workshops, agriculture such as temperature-controlled planting, animal husbandry such as temperature-controlled breeding, and communications such as data center computer rooms are becoming increasingly stringent. In order to maintain the ambient temperature, air-cooled refrigeration systems are usually required for cooling.

[0003] Because application loads and outdoor environmental conditions vary greatly throughout the year, with some outdoor environments experiencing temperature differences of more than ten degrees Celsius within a single day, air-cooled refrigeration systems have lower condensing temperatures when ambient temperatures are low, which is beneficial for energy conservation. However, a large amount of low-temperature air remains unused in the environment at this time. After the ambient temperature rises, the condenser of the refrigeration system can only exchange heat with the warmed air, resulting in lower energy efficiency for the refrigeration system. Utility Model Content

[0004] This application provides an energy storage refrigeration device to make full use of the low temperature of the environment in which the refrigeration device is located, thereby improving the energy efficiency of the refrigeration device.

[0005] The energy storage refrigeration device provided in this application embodiment includes: a water-cooled refrigeration system and an energy storage system, wherein,

[0006] The water-cooled refrigeration system includes: a condenser, a compressor, an evaporator, and a throttling device connected by refrigeration pipes;

[0007] The energy storage system includes a gravity heat pipe and an energy storage component. The energy storage component exchanges heat with the condenser. The evaporation section of the gravity heat pipe is located in the energy storage component, and the condensation section of the gravity heat pipe is located in the outdoor environment where the refrigeration equipment is located.

[0008] In the aforementioned refrigeration equipment, when the ambient temperature is lower than the temperature of the medium in the energy storage component, the heat of the medium in the energy storage component is transferred to the environment through the gravity heat pipe. When the ambient temperature is higher than the temperature of the medium in the energy storage component, due to the single-phase heat transfer characteristic of the gravity heat pipe in the energy storage system, the heat transferred from the environment to the energy storage component is relatively small. In this way, the energy storage component can make full use of the heat dissipation effect of the low ambient temperature. When the ambient temperature is high, the heat released by the refrigeration system is stored using the heat capacity of the medium in the energy storage component. When the ambient temperature drops, the heat stored in the medium in the energy storage component is released. Therefore, this application combines a water-cooled refrigeration system with an energy storage system, and utilizes the single-phase heat transfer characteristic of the gravity heat pipe to make full use of the low ambient temperature throughout the day, realizing heat release when the ambient temperature is low and avoiding heat release as much as possible when the ambient temperature is high, thereby making full use of the low temperature of the environment in which the refrigeration equipment is located and improving the energy efficiency of the refrigeration equipment.

[0009] In one possible implementation, the energy storage system further includes a fan disposed on one side of the condensation section of the gravity heat pipe.

[0010] In the aforementioned refrigeration equipment, a fan is installed on one side of the condenser section of the gravity heat pipe, which can provide power for airflow and improve the heat dissipation efficiency of the gravity heat pipe.

[0011] In one possible implementation, the angle between the condensation section of the gravity heat pipe and the vertical direction is within a preset angle range.

[0012] In the aforementioned refrigeration equipment, the condenser section of the gravity heat pipe is designed to form a certain angle with the vertical direction, and air flow is achieved through natural air convection, thereby improving the heat dissipation efficiency of the gravity heat pipe.

[0013] In one possible implementation, the device further includes a first precooling system for precooling the refrigerant flowing through the evaporator using a natural cold source.

[0014] In the aforementioned refrigeration equipment, the first precooling system utilizes a natural cold source to precool the refrigerant medium flowing through the evaporator, thereby further improving the energy efficiency of the refrigeration equipment.

[0015] In one possible implementation, the device further includes a second precooling system that exchanges heat with the energy storage component for precooling the return refrigerant flowing through the evaporator.

[0016] In the aforementioned refrigeration equipment, a second pre-cooling system that exchanges heat with the energy storage components pre-cools the return refrigerant flowing through the evaporator, thereby further improving the energy efficiency of the refrigeration equipment.

[0017] In one possible implementation, a water pump is installed on the heat exchange pipeline between the second precooling system and the energy storage component.

[0018] In one possible implementation, a water pump is provided on the heat exchange pipeline between the condenser and the energy storage component.

[0019] In one possible implementation, the energy storage component or the energy storage system is placed in an underground pit.

[0020] In the aforementioned refrigeration equipment, placing the energy storage components or system in an underground pit can save ground space and reduce manufacturing costs.

[0021] In one possible implementation, the energy storage component is filled with a phase change material.

[0022] In one possible implementation, the gravity heat pipe is made of stainless steel. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the energy storage refrigeration device provided in the embodiments of this application;

[0025] Figure 2 This is a schematic diagram of another energy storage refrigeration device provided in an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of another energy storage refrigeration device provided in an embodiment of this application. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0029] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0030] Before introducing the energy storage refrigeration device provided in the embodiments of this application, the technical background of the embodiments of this application will be described in detail for ease of understanding.

[0031] With the continuous progress of industrialization, the requirements for ambient temperature in industries such as temperature-controlled workshops, agriculture such as temperature-controlled planting, animal husbandry such as temperature-controlled breeding, and communications such as data center computer rooms are becoming increasingly stringent. In order to maintain the ambient temperature, air-cooled refrigeration systems are usually required for cooling.

[0032] Because application loads and outdoor environmental conditions vary greatly throughout the year, with some outdoor environments experiencing temperature differences of more than ten degrees Celsius within a single day, air-cooled refrigeration systems have lower condensing temperatures when ambient temperatures are low, which is beneficial for energy conservation. However, a large amount of low-temperature air remains unused in the environment at this time. After the ambient temperature rises, the condenser of the refrigeration system can only exchange heat with the warmed air, resulting in lower energy efficiency for the refrigeration system.

[0033] In view of this, the embodiments of this application provide an energy storage refrigeration device, which combines a water-cooled refrigeration system with an energy storage system. By utilizing the single-phase heat transfer characteristics of gravity heat pipes, it makes full use of the low ambient temperature throughout the day, realizes heat release when the ambient temperature is low, and avoids heat release when the ambient temperature is high as much as possible, thereby making full use of the low temperature of the environment in which the refrigeration device is located and improving the energy efficiency of the refrigeration device.

[0034] It should be noted that the energy storage refrigeration equipment provided in this application embodiment can be applied to application scenarios where there are temperature changes within a day (day and night), and is particularly suitable for application scenarios where the temperature difference within a day (day and night) is large.

[0035] After introducing the background technology of the embodiments of this application, the energy storage refrigeration equipment provided in the embodiments of this application will be described in detail below with reference to specific embodiments.

[0036] See Figure 1As shown, it is a structural schematic diagram of the energy storage refrigeration device in the embodiment of this application, which specifically includes: a water-cooled refrigeration system 11 and an energy storage system 12.

[0037] The water-cooled refrigeration system 11 includes a condenser 111, a compressor 112, an evaporator 113, and a throttling device 114 connected by refrigeration pipes.

[0038] It should be noted that the water-cooled refrigeration system 11 is a water-cooled chiller, and its cold-side working medium can be water or a mixture of water.

[0039] The energy storage system 12 includes a gravity heat pipe 121 and an energy storage component 122. The energy storage component 122 exchanges heat with the condenser 111. The evaporation section of the gravity heat pipe 121 is located in the energy storage component 122, and the condensation section of the gravity heat pipe 121 is located in the outdoor environment where the refrigeration equipment is located.

[0040] In practical applications, when the ambient temperature is lower than the temperature of the medium in the energy storage component 122, the heat of the medium in the energy storage component 122 is transferred to the environment through the gravity heat pipe 121. When the ambient temperature is higher than the temperature of the medium in the energy storage component 122, due to the single-phase heat transfer characteristic of the gravity heat pipe 121 in the energy storage system 12, the amount of heat transferred from the environment to the energy storage component 122 is small. In this way, the energy storage component 122 can make full use of the heat dissipation effect of the low ambient temperature. When the ambient temperature is high, the heat released by the refrigeration system is stored using the heat capacity of the medium in the energy storage component 122. When the ambient temperature drops, the heat stored in the medium in the energy storage component 122 is released. Therefore, by combining the water-cooled refrigeration system 11 with the energy storage system 12 and utilizing the single-phase heat transfer characteristic of the gravity heat pipe 121, the low ambient temperature throughout the day can be fully utilized to release heat when the ambient temperature is low and to avoid releasing heat when the ambient temperature is high as much as possible. This fully utilizes the low temperature of the environment in which the refrigeration equipment is located and improves the energy efficiency of the refrigeration equipment.

[0041] In practical applications, a water pump 13 can be installed on the heat exchange pipeline between the condenser 111 and the energy storage component 122 to provide power for the energy storage component 122 to dissipate heat from the condenser 111.

[0042] In a specific implementation, the energy storage system 12 also includes a fan 123, which is located on one side of the condensation section of the gravity heat pipe 121 to provide power for airflow and improve the heat dissipation efficiency of the gravity heat pipe 121.

[0043] In some embodiments, the condensation section of the gravity heat pipe 121 can be configured to have a certain angle with the vertical direction, and the angle with the vertical direction is within a preset angle range. The preset angle range can be set according to the actual situation, for example, the preset angle range is [0°, 90°].

[0044] By designing the condenser section of the gravity heat pipe to form a certain angle with the vertical direction, airflow can be achieved through natural air convection, thereby improving the heat dissipation efficiency of the gravity heat pipe.

[0045] It should be noted that phase change materials can be filled into the energy storage component 122 to reduce the amount of water used as the energy storage medium; the material of the gravity heat pipe 121 includes, but is not limited to, stainless steel, and the material of the fins of the gravity heat pipe 121 can also include, but is not limited to, stainless steel, or copper or aluminum; the energy storage component 122 or the energy storage system 12 can be placed in an underground pit to save ground space and reduce manufacturing costs.

[0046] In practice, to further improve the energy efficiency of refrigeration equipment, such as Figure 2 As shown, the refrigeration equipment also includes a first precooling system 21, used to precool the refrigerant medium flowing back through the evaporator using a natural cold source. The first precooling system 21 can be a fan.

[0047] exist Figure 2 In the refrigeration equipment shown, the first precooling system 21 can first use a natural cold source (such as ambient temperature) to precool the return refrigerant, and then the evaporator 113 actively cools the return refrigerant, thereby utilizing the natural cold source to further improve the energy efficiency of the refrigeration equipment.

[0048] It should be noted that if the heat exchange provided by the first precooling system 21 using the natural cold source can meet the refrigeration demand, that is, the refrigeration demand can be met by precooling the return refrigeration medium through the first precooling system 21, then active refrigeration can be bypassed and the evaporator of the water-cooled refrigeration system can be bypassed to achieve completely free cooling.

[0049] In other embodiments, in order to further improve the energy efficiency of the refrigeration equipment, such as Figure 3 As shown, the refrigeration equipment also includes a second precooling system 31, which exchanges heat with the energy storage component 122 to precool the return refrigerant flowing through the evaporator. The second precooling system 31 can be a heat exchanger.

[0050] exist Figure 3 In the refrigeration equipment shown, the second precooling system 31 exchanges heat with the energy storage component 122. It can precool the return refrigerant first, and then the evaporator 113 actively cools the return refrigerant, thereby making full use of the cold energy stored in the energy storage component 122 and further improving the energy efficiency of the refrigeration equipment.

[0051] It should be noted that if the heat exchange between the second precooling system 31 and the energy storage component 122 can meet the cooling demand, that is, if the cooling demand can be met by precooling the return cooling medium through the second precooling system 31, then active cooling can be bypassed and the evaporator of the water-cooled cooling system can be bypassed to achieve completely free cooling.

[0052] In practical applications, a water pump 32 can be installed on the heat exchange pipeline between the second precooling system 31 and the energy storage component 122 to provide power for the energy storage component 122 to dissipate heat from the second precooling system 31.

[0053] It should be noted that in practical applications, the first precooling system and the second precooling system can be used alone or in combination. This application embodiment does not limit this.

[0054] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An energy storage refrigeration device, characterized in that, include: Water-cooled refrigeration system (11) and energy storage system (12), wherein, The water-cooled refrigeration system (11) includes: a condenser (111), a compressor (112), an evaporator (113), and a throttling device (114) connected by refrigeration pipes. The energy storage system (12) includes a gravity heat pipe (121) and an energy storage component (122). The energy storage component (122) exchanges heat with the condenser (111). The evaporation section of the gravity heat pipe (121) is located in the energy storage component (122), and the condensation section of the gravity heat pipe (121) is located in the outdoor environment where the refrigeration equipment is located.

2. The device according to claim 1, characterized in that, The energy storage system (12) also includes a fan (123) located on one side of the condensation section of the gravity heat pipe (121).

3. The device according to claim 1, characterized in that, The angle between the condensation section of the gravity heat pipe (121) and the vertical direction is within a preset angle range.

4. The device according to claim 1, characterized in that, The device further includes a first precooling system (21) for precooling the recirculating refrigerant flowing through the evaporator (113) using a natural cold source.

5. The device according to claim 1 or 4, characterized in that, The device further includes a second precooling system (31) that exchanges heat with the energy storage component (122) for precooling the refrigeration medium flowing through the evaporator (113).

6. The device according to claim 5, characterized in that, A first water pump (32) is installed on the heat exchange pipeline between the second precooling system (31) and the energy storage component (122).

7. The device according to any one of claims 1-4, characterized in that, A second water pump (13) is installed on the heat exchange pipeline between the condenser (111) and the energy storage component (122).

8. The device according to any one of claims 1-4, characterized in that, The energy storage component (122) or the energy storage system (12) is placed in an underground pit.

9. The device according to any one of claims 1-4, characterized in that, The energy storage component (122) is filled with phase change material.

10. The device according to any one of claims 1-4, characterized in that, The gravity heat pipe (121) is made of stainless steel.

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