Air cooling energy cross-seasonal cascade orderly storage and supply system and control method thereof

Abstract

The present invention provides an air cooling energy cross-seasonal cascaded orderly cold storage / supply system, characterized in that the system includes a cold storage refrigerant water circulation pump, an air cooler, an ice cold storage tank, a water cold storage tank, a low-temperature refrigerant water circulation pump, a high-temperature refrigerant water circulation pump, and an insulation layer. The outlet of the air cooler is connected to the inlet of the ice cold storage tank; the outlet of the ice cold storage tank is connected to the inlet of the water cold storage tank; the outlet of the water cold storage tank is connected to the inlet of the cold storage refrigerant water circulation pump; and the outlet of the cold storage refrigerant water circulation pump is connected to the inlet of the air cooler, thereby realizing the system's latent / sensible cooling series cascade orderly cold storage. The outlets of the low-temperature refrigerant water circulation pump and the high-temperature refrigerant water circulation pump are connected to the inlets of the ice cold storage tank and the water cold storage tank, respectively, providing two refrigerant waters of different temperatures, which can be used in an air conditioning system with independent temperature and humidity control, realizing independent temperature / humidity control and parallel cooling supply.

Description

Technical Field

[0001] The present invention relates to the field of cooling technology, and specifically to a cross-seasonal cascade orderly storage / cooling system for air cooling energy. Background Art

[0002] With the depletion of non-renewable energy such as fossil fuels, environmental issues such as global warming and climate change have become the focus of attention of countries around the world. We should vigorously develop green, low-carbon and renewable energy.

[0003] Natural cooling energy is the low-temperature energy that naturally exists in a normal-temperature environment. Temperature differences are ubiquitous in the natural environment, and nature's ability to maintain ambient temperature is unlimited. Natural cooling energy is infinite in quantity and is a vast, green, low-grade renewable energy source. However, the development and utilization of natural cooling energy is relatively limited, especially the cross-seasonal use of natural air cooling energy. This energy source is currently underutilized.

[0004] Traditional ice storage systems utilize ice's phase change to store cold. They cannot store cold energy at different temperatures across seasons, nor can they provide refrigerant water at two temperatures simultaneously. Furthermore, they cannot implement tiered, orderly storage and utilization of cold energy across seasons. Natural air cooling energy is a green, low-grade, renewable energy source that requires tiered utilization based on energy quality. The tiered, orderly storage and utilization of natural air cooling energy improves its utilization efficiency and reduces irreversible losses during storage and utilization. Summary of the Invention

[0005] The purpose of the present invention is to address the deficiencies of the prior art and provide a new type of air cooling energy cross-seasonal cascade orderly storage / supply system.

[0006] The technical solutions of the present invention are as follows:

[0007] An air cooling energy cross-seasonal cascade orderly storage / supply system is characterized in that the system includes a cold storage refrigerant water circulation pump, an air cooler, an ice storage tank, a water storage tank, a low-temperature refrigerant water circulation pump, a high-temperature refrigerant water circulation pump and an insulation layer.

[0008] The outlet of the air cooler is connected to the inlet of the ice storage tank; the outlet of the ice storage tank is connected to the inlet of the water storage tank; the outlet of the water storage tank is connected to the inlet of the cold storage refrigerant water circulation pump; the outlet of the cold storage refrigerant water circulation pump is connected to the inlet of the air cooler, realizing the system's latent / sensible cooling series cascade orderly cold storage.

[0009] The outlets of the low-temperature refrigerant water circulation pump and the high-temperature refrigerant water circulation pump are connected to the inlets of the ice storage tank and the water storage tank respectively, providing refrigerant water of two different temperatures, which can be used for independent temperature and humidity control air-conditioning systems to achieve independent temperature / humidity control and parallel cooling.

[0010] The air cooler adopts a series / parallel mode. Multiple air coolers are connected in series to achieve natural cooling of the refrigerant water cascade; multiple air coolers are connected in parallel to meet the needs of variable flow conditions of refrigerant water; air coolers are connected in series / parallel to achieve cascade natural cooling of variable flow of refrigerant water.

[0011] The ice cold storage tank is in contact with the thermal insulation layer; the thermal insulation layer is in contact with the water cold storage tanks on both sides respectively; and the water cold storage tank is in direct contact with the earth's soil.

[0012] A first valve is provided at the outlet of the air cooler, a second valve is provided on the branch connecting the outlet of the air cooler and the inlet of the ice storage tank; a fourth valve is provided on the pipeline connecting the outlet of the cold storage refrigerant water circulation pump and the inlet of the air cooler.

[0013] A third valve is provided on a branch road connecting the outlet of the ice cold storage tank and the inlet of the water cold storage tank, and a seventh valve is provided on another branch road of the outlet of the ice cold storage tank.

[0014] An eleventh valve is provided on a branch line connecting the third valve with the first valve, the second valve and the sixth valve.

[0015] A tenth valve is provided on the branch line at the outlet of the cold water storage tank.

[0016] A fifth valve is provided on the inlet pipe of the low-temperature refrigerant water circulating pump; a sixth valve is provided on the outlet pipe of the low-temperature refrigerant water circulating pump; an eighth valve is provided on the inlet pipe of the high-temperature refrigerant water circulating pump; and a ninth valve is provided on the outlet pipe of the high-temperature refrigerant water circulating pump.

[0017] The present invention also provides the following technical solutions.

[0018] The control method of the above-mentioned air cooling energy cross-seasonal cascade orderly storage / supply system comprises the following steps:

[0019] In the cascade orderly cold storage working condition, if the ambient air temperature is lower than 0℃, the first valve, the second valve, the third valve and the fourth valve are opened, and the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve, the tenth valve and the eleventh valve are closed; if the ambient air temperature is not lower than 0℃, the first valve, the fourth valve and the eleventh valve are opened, and the second valve, the third valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve and the tenth valve are closed.

[0020] In the cascade orderly cooling condition, open the second valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve and the tenth valve, and close the first valve, the third valve, the fourth valve and the eleventh valve.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] Connecting multiple air coolers in series or parallel enables variable-flow, cascaded natural cooling of the refrigerant water. Connecting multiple air coolers in series allows for cascaded cooling of the refrigerant water. By flexibly increasing or decreasing the number of air coolers, different levels of natural cooling can be achieved. Connecting multiple air coolers in parallel allows for natural cooling of refrigerant water at varying flow rates, achieving variable refrigerant water flow regulation and meeting the system's varying flow requirements under different operating conditions. This series / parallel air cooler configuration improves overall system flexibility and offers strong applicability.

[0023] By controlling the opening and closing of valves, natural cooling energy storage is achieved for different ambient air temperatures. When the ambient air temperature is below 0°C, the refrigerant water naturally cooled by the air cooler passes through the ice storage tank and the water storage tank, respectively, for ice storage and water storage, respectively, achieving orderly cold storage in a series of latent and sensible cooling cascades. When the ambient air temperature is above or equal to 0°C, the refrigerant water naturally cooled by the air cooler bypasses the ice storage tank and enters the water storage tank directly for water storage. This achieves flexible storage of natural cooling energy of different grades, meeting the normal use of the system under different application conditions and improving the system's applicability.

[0024] When the system is providing cooling, it uses two branches, one from the ice storage tank and the other from the water storage tank, to ensure that the system can simultaneously provide refrigerant water at two temperatures. The high and low temperature refrigerant water can provide a cooling source for the temperature and humidity independent control air conditioning system. Similarly, it can meet the cooling needs of different operating conditions at different temperatures, achieving efficient and rational utilization of natural cooling energy stored across seasons.

[0025] In the underground cold storage tank, the ice tank, insulation layer, water tank, and soil all come into contact with each other in sequence, forming a stacked ice-water-soil structure. This stacked arrangement of the ice tank, insulation layer, and water tank effectively isolates the upper and lower parts of the ice in the tank, as well as the ice and water. This ensures stable temperature within the tank and effectively reduces the loss of cold energy during storage. Furthermore, the water tank is in direct contact with the soil, eliminating the need for an additional insulation layer. Due to the excellent temperature stability of the soil, the soil itself acts as an auxiliary cooling medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1This is a schematic diagram of the seasonal cascade orderly storage / supply system of air cooling energy.

[0027] In the figure: 1 - cold storage refrigerant water circulation pump; 2 - air cooler; 3 - ice storage tank; 4 - water storage tank; 5 - low-temperature refrigerant water circulation pump; 6 - high-temperature refrigerant water circulation pump; 7 - insulation layer; 8 - earth soil; V1 to V11: first to eleventh valves. DETAILED DESCRIPTION

[0028] In order to make the present invention easier to understand, Figure 1 The technical solution of the present invention is described in detail with specific embodiments, which does not limit the scope of protection required by the patent application.

[0029] like Figure 1 The air cooling energy seasonal cascade orderly storage / supply system shown includes a cold storage refrigerant circulation pump 1, an air cooler 2, an ice storage tank 3, a water storage tank 4, a low-temperature refrigerant water circulation pump 5, a high-temperature refrigerant water circulation pump 6, an insulation layer 7, earth soil 8 and valves V1 to V11.

[0030] The water cold storage tank 4 is in direct contact with the ground soil 8. The ice cold storage tank 3, the insulation layer 7, the water cold storage tank 4, and the ground soil 8 are in sequential contact, forming an underground cold storage tank with a stacked ice-water-soil structure. The ice cold storage tank 3 is surrounded by the insulation layer 7, isolating the upper and lower parts of the ice in the ice cold storage tank. The ground soil 8, with its stable temperature, can provide auxiliary cold storage.

[0031] Air coolers 2 utilize a series / parallel connection mode. Multiple air coolers 2 can be connected in series to achieve cascaded natural cooling of the refrigerant water; multiple air coolers 2 can be connected in parallel to meet the needs of variable refrigerant water flow conditions; and air coolers 2 can be connected in series / parallel to achieve cascaded natural cooling of variable refrigerant water flow. There is no limit on the number of air coolers 2 and they can be flexibly reduced or reduced based on actual operating conditions.

[0032] In this embodiment, the outlet of the cold storage refrigerant circulation pump 1 is connected to the inlet of the valve V4, the outlet of the valve V4 is connected to the inlet of the air cooler 2, the outlet of the air cooler 2 is connected to the inlet of the valve V1, the outlet of the valve V1 is connected to the inlets of the valve V2 and the valve V11 respectively, the outlet of the valve V2 is connected to the inlet of the ice storage tank 3, the outlet of the ice storage tank 3 is connected to the inlet of the valve V3, the outlet of the valve V3 is connected to the inlet of the water storage tank 4, the outlet of the valve V11 is connected to the inlet of the water storage tank 4, the outlet of the water storage tank 4 is connected to the inlet of the cold storage refrigerant circulation pump 1 connected; the outlet of valve V5 is connected to the inlet of the low-temperature refrigerant water circulating pump 5, the outlet of the low-temperature refrigerant water circulating pump 5 is connected to the inlet of valve V6, the outlet of valve V6 is connected to the inlet of valve V2, the outlet of valve V2 is connected to the inlet of the ice storage tank 3, the outlet of the ice storage tank 3 is connected to the inlet of valve V7; the outlet of valve V8 is connected to the inlet of the high-temperature refrigerant water circulating pump 6, the outlet of the high-temperature refrigerant water circulating pump 6 is connected to the inlet of valve V9, the outlet of valve V9 is connected to the inlet of the water storage tank 4, and the outlet of the water storage tank 4 is connected to the inlet of valve V10.

[0033] If the ambient temperature is below 0°C in winter, the first valve, the second valve, the third valve and the fourth valve V1, V2, V3 and V4 are opened, and the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve, the tenth valve and the eleventh valve V5, V6, V7, V8, V9, V10 and V11 are closed. The refrigerant water flowing out of the air cooler flows through the ice storage tank 3 and the water storage tank 4 in sequence for cold storage, realizing the latent cooling and sensible cooling series cascade orderly cold storage.

[0034] If the ambient temperature in winter is not lower than 0℃, open the first valve, the fourth valve and the eleventh valve V1, V4 and V11, and close the second valve, the third valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve and the tenth valve V2, V3, V5, V6, V7, V8, V9 and V10, and the refrigerant water flowing out of the air cooler flows directly into the water cold storage tank 4 for cold storage.

[0035] When cooling is performed in summer and transitional seasons, the second valve, fifth valve, sixth valve, seventh valve, eighth valve, ninth valve and tenth valve V2, V5, V6, V7, V8, V9 and V10 are opened, and the first valve, third valve, fourth valve and eleventh valve V1, V3, V4 and V11 are closed. This can provide refrigerant water at two different temperatures at the same time, and can be used as a good cold source for air-conditioning systems with independent temperature and humidity control.

[0036] The present invention realizes the cross-seasonal orderly cascade cold storage and cold supply of air cooling energy, and realizes variable flow cascade natural cooling of refrigerant water by connecting multiple air coolers in series and parallel. By respectively setting up two cold storage tanks, an ice storage tank and a water storage tank, orderly cascade cold storage of latent cooling and sensible cooling is realized. By taking cold from the ice storage tank and the water storage tank respectively, the system can provide refrigerant water of two different temperatures at the same time. By setting up a stacked structure of ice-water-soil layers for the underground ice storage tank, the upper and lower parts of the ice storage tank and the ice-water insulation are realized, which effectively ensures the temperature stability in the ice storage tank and reduces the loss of cold during the storage process. The water storage tank is in direct contact with the earth's soil, and there is no need to add an additional insulation layer, thereby realizing auxiliary cold storage of the soil.

[0037] The above are only preferred embodiments of the present invention, but the present invention is not limited to the above specific embodiments. For ordinary technicians in this field, several variations and improvements can be made without departing from the creative concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. An air cooling energy cross-seasonal cascade orderly storage / supply system, characterized by: include: A cold storage refrigerant water circulation pump (1), an air cooler (2), an ice cold storage tank (3), a water cold storage tank (4), a low-temperature refrigerant water circulation pump (5), a high-temperature refrigerant water circulation pump (6), and a thermal insulation layer (7); The outlet of the air cooler (2) is connected to the inlet of the ice cold storage tank (3); the outlet of the ice cold storage tank (3) is connected to the inlet of the water cold storage tank (4); the outlet of the water cold storage tank (4) is connected to the inlet of the cold storage refrigerant water circulation pump (1); the outlet of the cold storage refrigerant water circulation pump (1) is connected to the inlet of the air cooler (2); The outlet of the low-temperature refrigerant water circulation pump (5) is connected to the inlet of the ice cold storage tank (3) and the inlet of the water cold storage tank (4) respectively; The outlet of the high-temperature refrigerant water circulation pump (6) is connected to the inlet of the ice cold storage tank (3) and the inlet of the water cold storage tank (4) respectively; The thermal insulation layer (7) is arranged around the ice cold storage pool (3) and is in contact with the ice cold storage pool (3); the thermal insulation layer (7) is in contact with the water cold storage pools (4) on both sides respectively; and the water cold storage pools (4) are in contact with the earth soil (8).

2. The air cooling energy cross-seasonal cascade orderly storage / supply system according to claim 1 is characterized in that: The outlet of the air cooler (2) is provided with a first valve (V1), and a second valve (V2) is provided on a branch line connecting the outlet of the air cooler (2) and the inlet of the ice storage tank (3); a fourth valve (V4) is provided on a pipeline connecting the outlet of the cold storage refrigerant water circulation pump (1) and the inlet of the air cooler (2); A third valve (V3) is provided on a branch connecting the outlet of the ice cold storage tank (3) and the inlet of the water cold storage tank (4), and a seventh valve (V7) is provided on another branch of the outlet of the ice cold storage tank (3); A fifth valve (V5) is provided on the inlet pipe of the low-temperature refrigerant water circulation pump (5); a sixth valve (V6) is provided on the outlet pipe of the low-temperature refrigerant water circulation pump (5); an eighth valve (V8) is provided on the inlet pipe of the high-temperature refrigerant water circulation pump (6); and a ninth valve (V9) is provided on the outlet pipe of the high-temperature refrigerant water circulation pump (6); A tenth valve (V10) is provided on the branch line at the outlet of the cold water storage tank (4); An eleventh valve (V11) is provided on a branch line connecting the third valve (V3) with the first valve (V1), the second valve (V2) and the sixth valve (V6).

3. The air cooling energy cross-seasonal cascade orderly storage / supply system according to claim 1 is characterized in that: The ice cold storage tank (3) and the water cold storage tank (4) are arranged underground.

4. A control method for the air cooling energy cross-seasonal cascade orderly storage / supply system according to claim 2, characterized in that: The following steps are involved: In the cascade orderly cold storage operating condition, if the ambient air temperature is lower than 0°C, the first valve (V1), the second valve (V2), the third valve (V3) and the fourth valve (V4) are opened, and the fifth valve (V5), the sixth valve (V6), the seventh valve (V7), the eighth valve (V8), the ninth valve (V9), the tenth valve (V10) and the eleventh valve (V11) are closed; if the ambient air temperature is not lower than 0°C, the first valve (V1), the fourth valve (V4) and the eleventh valve (V11) are opened, and the second valve (V2), the third valve (V3), the fifth valve (V5), the sixth valve (V6), the seventh valve (V7), the eighth valve (V8), the ninth valve (V9) and the tenth valve (V10) are closed; In the cascade orderly cooling operation mode, the second valve (V2), the fifth valve (V5), the sixth valve (V6), the seventh valve (V7), the eighth valve (V8), the ninth valve (V9) and the tenth valve (V10) are opened, and the first valve (V1), the third valve (V3), the fourth valve (V4) and the eleventh valve (V11) are closed.

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