Oil storage and energy storage device and method

Abstract

The present invention discloses an apparatus and method for oil storage and energy storage, including an oil storage system, an energy collection system, an energy storage system, and an energy conversion system. The heat collection system is connected to the energy conversion system, the oil storage system is connected to the energy conversion system, and the energy conversion system is connected to the energy storage system, and the oil input / output piping leads to the energy conversion system. The oil in the oil storage system absorbs or releases energy when passing through the energy conversion system, and heats or lowers the temperature of the oil that has absorbed or released energy. The energy conversion system controls the temperature increase or decrease of the energy according to the type of oil and as required, and inputs the oil that has absorbed or released energy through the oil input / output piping into an oil storage tank of the energy storage system for storage, or outputs the oil to the oil storage system. The energy absorbed or released by the oil in the energy conversion system lowers or heats the medium in the energy input / output piping in the energy conversion system, and is output to a user for use through the energy input / output piping of the energy conversion system by pump drive, or is output and stored or released.

Description

[Technical field]

[0001] The present invention relates to the technical fields of oil storage, heating and air conditioning, water supply and drainage, and energy storage, and in particular to an apparatus and method for oil storage and energy storage. [Background technology]

[0002] In the future, we urgently need large-scale energy storage devices, but currently, battery energy storage is expensive and small in scale, while electrochemical energy storage technology is still immature and limited in scale, and the requirements for related technologies and equipment are even higher. Currently, the only feasible large-scale energy storage is still the traditional pumped storage energy storage, but the requirements for location selection are very high, and it is difficult to match the location of the energy consumption area.

[0003] Previously, our oil storage system could only achieve the function of oil storage, occupying a large amount of space and resources, and could only achieve a single oil storage function. Currently, our main demand for energy conservation and emission reduction is the demand for the function of storing a large amount of heat, and if we were to build a large-scale energy storage facility alone, we would need to spend a huge investment. In addition, in areas where heat and cooling are supplied intensively, a lot of energy is required for heat supply and cooling supply, and due to the need for environmental protection, we cannot continue to build large-scale fossil energy heat supply and cooling supply systems. Meanwhile, due to the need for production reserves or strategic reserves, many large strategic oil tank rooms have already been built, and more oil tank rooms are planned to be built in the future, including those equivalent to one million to tens of millions of tons. However, these oil tank rooms only play the role of oil storage, and the oil stored therein may not be used within a considerable period of time.

[0004] Solar energy, wind energy, geothermal energy and other clean energy, the biggest problem is the safe storage of energy. The north has relatively good wind and photovoltaic power resources, and a large amount of mature heat supply piping, but there is no better way to combine wind energy and solar energy to supply heat. The south has relatively good solar energy resources, and many buildings have centralized cooling supply systems, but there is no way to use solar energy to centralize cooling. Mainly because there is no good energy storage method, currently lithium battery arrays are used to store solar energy and wind energy, but lithium battery arrays are expensive and cannot fully guarantee safety.

[0005] Energy storage using oil as a carrier and medium is well known, but the scope of use of energy storage using oil storage tanks is very limited, and due to safety requirements, the reserves of oil storage tanks are strictly limited within a certain range, which does not meet the functional requirements of strategic energy storage at all. In our standards, the oil tank room is a strategically important place, fireworks must be strictly prohibited, and any relationship with the outside other than oil storage must be strictly prohibited, the oil tank room must be kept within the normal temperature range, heating must be strictly prohibited, and temperature rise must be strictly prohibited. Some oil products are fluid if they are not kept above a certain temperature, and require heating, but the heating is all to prevent the oil from solidifying and only to increase the fluidity, and does not have the function of large-scale energy storage utilization, and does not meet the requirements for large-scale energy storage utilization.

[0006] The heat capacity of water is 4200J / Kg.K, the heat capacity of molten salt is 1500J / Kg.K. Gasoline, diesel and kerosene also have large heat capacity, with a heat capacity of 2100J / Kg.K, half that of water and 1.4 times that of molten salt. The ignition point of general oil is basically above 200℃, while that of gasoline can reach above 400℃. The freezing point of oil is also low, with gasoline reaching -75℃. Therefore, the heat capacity of gasoline, diesel and kerosene is greater than that of molten salt, and the temperature adaptability range is greater than that of water. The temperature that can be universally artificially adapted is only around room temperature. If it is heated above room temperature, it will easily ignite, and if it is heated to 0 degrees, it will not condense. The temperature range of use is wide, and the oil quality will not change within the temperature change range, and it can be controlled to prevent evaporation.

[0007] In the range of temperature change, the volumetric energy density of gasoline and diesel oil is also large. For example, when gasoline is heated from -50℃ to 150℃, the increased energy is 100w.h / m 3 , heated from -50℃ to 50℃, the increase in energy is 50kw.h / m 3 The volumetric energy density of the lead energy storage tank is 90kw.h / m 3 The volumetric energy density of the Tesla battery is 260kw.h / m 3 , water is heated from 20℃ to 80℃, the increased energy is 70kw.h / m 3 However, 1m 3 The energy of gasoline combustion is 8600kw.h / m 3 So, as an engineer in the oil storage field, they are 8600w.h / m 3 They must want to use chemical energy from combustion. As an engineer in the field of oil storage, they definitely want to use 8600w.h / m 3They want to use the chemical energy obtained by the combustion of oil, and do not want to use the energy obtained by the physical temperature change of the large amount of oil in the oil tank room. As engineers in the heating field, they cannot get involved in the work of engineers in the oil storage field, and have no opportunity to think about using the oil in the oil tank as a medium to store energy. Moreover, they do not want to change the design regulations, get involved in the water supply and drainage fire design, and think about storing heat and cold in the large amount of water in the fire tank. Therefore, only by thinking from the perspective of the four technical fields of oil storage, heating and air conditioning, water supply and drainage, and energy storage, can we overcome the above technical prejudices, overcome the differences in technical fields and the constraints of each design standard, and take advantage of the convenience of energy exchange when large amounts of oil enter and exit, pour into the tank, and replace the tank, and solve the technical problems of large-scale energy storage.

[0008] Our country needs 2 million tons of oil every day, and only has a 40-day reserve, that is, 80 million tons, far from the 100-day reserve of developed countries. If we had a 100-day reserve, we would need a 200 million tons reserve, which is 120 million tons short. We need to build a larger oil storage system. The average American resident uses 5,000 KWh of electricity per person, and we currently have an average resident using 1,000 KWh of electricity per person. If we use 140 million tons of oil storage for energy storage, storing 100 KWh of electricity per time, and circulating at least 100 times a year, that is 14 trillion KWh of electricity, accounting for 20% of our country's annual electricity generation, and has a large energy storage capacity.

[0009] On the other hand, we have abundant heat resources all year round, but we do not have a way to store and utilize them fully, especially in the current situation where solar and wind power generation is strongly promoted, there is a lot of electricity that cannot be consumed by wind and solar power generation, and this electricity is not used effectively. At the same time, our heat pump system is also not fully utilized all year round, and there is still a need to fully utilize a large amount of industrial waste heat and peak valley electricity in a unified manner.

[0010] Therefore, whether it is the strategic wartime oil tank room, the industrial energy transportation oil tank room, making full use of solar energy, making full use of heat pumps, making full use of industrial waste heat, making full use of peak valley electricity, and making full use of power conversion that cannot be consumed by wind and solar power, due to the serious shortage of energy storage resources in existing technologies, all of the above energy equipment resources are not being fully utilized, resulting in a huge waste of energy and resources. Summary of the Invention

[0011] The present invention has been made in view of the deficiencies of the prior art, and aims to provide an apparatus and method for large-scale strategic energy storage that fully utilizes existing oil tankage resources.

[0012] The technical solutions adopted in the present invention are as follows:

[0013] An oil storage and energy storage apparatus and method includes an oil storage system, an energy collection system, an energy storage system, and an energy conversion system.

[0014] The oil storage system is used for storing oil and includes a group of oil storage tanks, oil, an oil inlet / outlet, oil input / output piping, and an oil pump room.

[0015] The energy collection system for collecting heat and cold, which includes a heat collection device, a cold collection device, energy input / output piping, and a medium in the piping, may be one or more of several energy collection types, including photovoltaic power generation energy collection, power energy collection that cannot be consumed by wind or solar power generation, industrial waste heat energy collection, peak valley electric energy collection, various heat pump energy collection, and solar thermal energy heat collection.

[0016] The energy storage system includes existing insulated and retrofitted oil storage tanks and oil in the tanks, or specially designed insulated oil storage tanks and oil in the tanks, and oil input and output piping.

[0017] The energy conversion system includes a heat exchanger, a heat pump, a circulation pump, a valve, oil input and output pipes, energy input and output pipes, and a medium in the pipes.

[0018] The heat collector and the cold collector are connected to the energy exchange system to input the collected energy into the energy exchange system.

[0019] The oil input and output piping of the oil pump room leads to the exchange system, the oil input and output piping of the energy storage system leads to the exchange system, and the oil input and output piping leads to the exchange system.

[0020] The oil in the oil storage tank or the oil input from the oil pump room is driven by the pump and passes through the energy conversion system, the oil absorbs or releases energy as it passes through the energy conversion system, and the oil that has absorbed or released energy is heated or cooled. The energy conversion system controls the temperature increase or decrease of the oil according to the type of oil and as necessary, and inputs the oil that has absorbed or released energy through the oil input / output piping into the oil storage tank of the energy storage system for storage, or outputs it to the oil pump room.

[0021] The energy absorbed or released by the oil in the energy conversion system reduces or heats the medium in the energy input / output piping in the thermal energy conversion system, and is output by pump drive through the energy piping of the energy conversion system for use by the user, or is output to another medium for storage or release.

[0022] In addition, the energy conversion system can be installed with multiple heat exchangers, which are connected in parallel with the oil input / output pipes, and the corresponding valve switches can be controlled to select multiple heat exchanges, or select a heat exchanger to exchange heat or not to exchange heat, and the oil passes directly through the oil input / output pipes. The heat exchangers and heat pumps can be used in series, and multiple heat pumps can be installed to increase the heat exchange efficiency.

[0023] In addition, the oil input / output piping of the oil storage system is made to penetrate deep into the oil tank, and three-way valves are installed at appropriate positions at the bottom, middle and top of the piping to facilitate the input and output of oil at different heights of the oil tank.

[0024] In addition, the energy storage system can include an existing heat-insulated modified oil storage tank and the oil in the oil tank, and can include an oil-water control system, which includes an oil-water separator, a water inlet, and a drain, and can inject water into the oil storage tank through the water inlet, and the water in the oil storage tank can be separated and discharged by the oil-water separator, and can store energy by injecting water into an empty tank or, if necessary, injecting water or other emergency media.

[0025] Furthermore, the oil storage tank group of the energy storage system includes a plurality of high-temperature tanks, a room-temperature tank, and a low-temperature tank, and each oil storage tank of the energy storage system is connected in parallel to an oil input / output pipe. Valves are installed in the input / output pipes between each tank, and the opening and closing of each valve can be controlled to input oil of different temperatures into specific oil storage tanks to form a temperature gradient, or to output oil in a specific oil tank to an oil pump room, thereby maximizing the energy storage capacity and the oil input / output efficiency.

[0026] Furthermore, the oil storage tank is a group of fire water tanks or reservoirs in a thermally insulated building, the oil pump room can be changed to a fire pump room, the oil input / output piping can be changed to an input / output water pipe, and in an emergency, the input water pipe can also be changed to an output water pipe to increase the output water volume, and the building's hot water system and / or ice storage system can also be connected to the energy conversion system to increase the energy storage capacity and equipment utilization efficiency.

[0027] Furthermore, the fire water tank group or reservoir group is an underground water storage dam with thermal insulation, which stores energy in a timely manner, stores water for emergencies, and uses it by pumping water out or irrigation as needed, while also storing or supplying energy.

[0028] Furthermore, the underground flood prevention storage dam is an artificial lake or dam that has been thermally insulated, and the artificial lake or dam is thermally insulated and then made into a structure that can be opened to the water surface before being thermally insulated. The water surface structure can also be equipped with solar energy collection equipment or other uses.

[0029] The present invention uses a heat collection system to collect heat from solar energy, electricity that cannot be consumed by wind power or photovoltaic power generation, industrial waste heat, etc., and stores these heat in an existing modified oil storage tank or redesigns a dedicated oil storage tank with heat insulation, using the long-term idle oil in the oil storage tank as the carrier and medium, storing energy in a timely manner, and using a heat exchange heat supply system in a timely manner to extract the heat or cold in the oil storage tank to supply heat or cool, so that there is no need to build a large-scale fossil energy heat supply and cooling supply system for centralized heat supply and cooling supply areas. It can provide more heat and cold to areas that need centralized heat supply and cooling supply, or store a large amount of energy for energy or regeneration, saving energy consumption, and also making full use of existing oil storage resources and cold source resources, fully utilizing the equipment resources of heat supply and cooling supply, improving the equipment utilization rate, and having a great economic effect. Achieving the purpose of sustainable centralized heat supply and cooling supply using clean energy has a significant effect on promoting the development of a dual-carbon market.

[0030] The present invention makes full use of existing oil tank room resources to carry out large-scale strategic energy storage, and solves the technical problems of large-scale energy storage and energy release that can be planned at any time using existing equipment, and has the beneficial effects of low cost investment, low technical hurdles, and easy location matching. [Brief description of the drawings]

[0031] In order to more clearly describe the specific implementation method of the present invention or the technical solutions in the prior art, the accompanying drawings necessary for describing the specific implementation method or the prior art are briefly described below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to actual scale. [Figure 1] FIG. 1 is a schematic diagram of the system structure of an oil storage and energy storage device and method according to an embodiment of the present application. [Diagram 2] FIG. 2 is a structural schematic diagram of an energy conversion system for an oil and energy storage device according to an embodiment of the present application. [Diagram 3] FIG. 3 is a schematic diagram of the system structure of an oil storage tank group of an oil and energy storage device according to an embodiment of the present application. [Figure 4] Figure 4 is a schematic diagram of the system structure utilizing a group of fire tanks and a fire pond water storage and energy storage device in a building according to an embodiment of the present application. [Diagram 5] FIG. 5 is a schematic diagram of the system structure of an energy storage device utilizing an underground water storage dam according to an embodiment of the present application. [Figure 6] FIG. 6 is a schematic diagram of the system structure of an energy storage device utilizing a water storage dam according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] It will now be explained that the devices and systems, functions and methods, etc., according to the present invention are not merely conventional adaptive applications of the prior art.

[0033] Hereinafter, the implementation examples of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following implementation examples are provided to more clearly explain the technical solution of the present invention, and are only illustrative and do not limit the protection scope of the present invention.

[0034] It should be noted that unless otherwise specified, technical or scientific terms used in this application have the ordinary meaning as understood by a person skilled in the art to which this invention belongs.

[0035] 1 to 6, the present application relates to an apparatus and method for oil storage and energy storage, including an oil storage system, a heat collection system, an energy storage system, and an energy conversion system.

[0036] Referring to FIG. 1, an oil storage and energy storage apparatus and method includes an oil storage system (10), an energy collection system (20), an energy storage system (30), and an energy conversion system (40).

[0037] The oil storage system (10) is used to store oil, and includes a group of oil storage tanks (11), oil (12), an oil inlet / outlet (13), oil input / output piping (14) and an oil pump room (15).

[0038] The energy collection system (20) for collecting heat and cold, including a heat collector (21), a cold collector (22), energy input / output piping, and the medium in the piping, can collect heat and cold in one or more of several energy collection forms, including photovoltaic power generation energy collection, energy collection that cannot be consumed by wind or solar power generation, industrial waste heat energy collection, peak valley electric energy collection, various heat pump energy collection, and solar thermal energy heat collection.

[0039] The energy storage system (30) includes a set of existing oil storage tanks (11) that have been retrofitted via thermal insulation 31 and oil (12) in the oil tanks, or a set of specially designed oil storage tanks (11) with thermal insulation and oil (12) in the oil tanks, and oil input and output piping (14).

[0040] The energy conversion system (40) includes a heat exchanger (41), a heat pump (42), a circulation pump (43), a valve (44), oil input / output pipes (14), energy input / output pipes (23), and a medium in the pipes (24).

[0041] The heat collector (21) and the cold collector (22) are connected to the energy conversion system (30) to input the collected energy to the energy conversion system (40).

[0042] The oil input / output pipes (14) of the oil pump room (15) communicate with the energy conversion system (40), the oil input / output pipes (14) of the energy storage system (30) communicate with the energy conversion system (40), and the oil input / output pipes (14) communicate with the energy conversion system (40).

[0043] The oil (12) in the oil storage tank (11) or the oil (12) input from the oil pump chamber (15) passes through the energy exchange system (40) by pumping, and the oil (12) absorbs or releases energy, and the oil (12) that has absorbed or released energy is heated or cooled. The energy conversion system (40) controls the temperature increase or decrease of the oil depending on the type of oil (12) and the need, and inputs the oil (12) that has absorbed or released energy into the oil storage tank (11) of the energy storage system (30) through the oil input / output piping (14) for storage, or outputs the oil (12) to the inlet / outlet (13) of the oil pump chamber (15).

[0044] The energy absorbed or released by the oil in the energy conversion system (40) reduces or heats the medium (24) in the energy input / output piping (23) of the energy conversion system, and is output to the user through the energy input / output piping (23) of the energy conversion system (40) by pumping, or is output to another medium for storage or release.

[0045] Referring to Fig. 2, the energy conversion system (40) may be provided with a plurality of heat exchangers (41). The heat exchangers (41) are connected in parallel to the oil input / output pipe (14), and the corresponding valves are controlled to select a plurality of heat exchanges, or to select a heat exchanger to perform heat exchange or not to perform heat exchange, so that the oil passes directly through the oil input / output pipe (14). The heat exchangers (41) and the heat pumps (42) may be used in series, and a plurality of heat pumps (42) may be installed to increase the heat exchange efficiency.

[0046] The oil input / output piping (14) of the oil storage system (10) penetrates deep into the oil tank (11), and three-way valves 16 are installed at appropriate positions at the bottom, middle and top of the piping to facilitate the input and output of oil to different height locations of the oil tank.

[0047] The energy storage system (30) includes an existing heat-insulated and insulated 31 modified oil storage tank (11) and oil (12) in the oil tank, and may include an oil-water control system, which includes an oil-water separator, a water inlet, and a drain, and can inject water into the oil storage tank through the water inlet, and the water in the oil storage tank can be separated and discharged by the oil-water separator, and can store energy by injecting water into an empty tank or other emergency media when necessary.

[0048] Referring to FIG. 3, the group of oil storage tanks (11) of the energy storage system (30) includes a plurality of high-temperature oil storage tanks (11), a room-temperature oil storage tank (11), and a low-temperature oil storage tank (11). Each oil storage tank (11) of the energy storage system (30) is connected in parallel to an oil input / output pipe (14). Valves (44) are installed in the input / output pipe between each oil storage tank (11). The opening and closing of each valve (44) is controlled to facilitate inputting oil (12) of different temperatures into a specific oil storage tank (11) to form a temperature gradient, or outputting the oil (12) in a specific oil storage tank (11) to the oil pump room (15), thereby maximizing the energy storage capacity and the input / output efficiency of the oil (12).

[0049] The energy storage system (30) uses the energy collection system (20) at appropriate times to collect heat or cold, and in particular, uses various heat pumps (42) at appropriate times to separate the heat transport of each oil tank room (11), and the energy conversion system (40) supplies cooling or heat at appropriate times, and can simultaneously achieve the functions of oil storage and energy storage by connecting the oil tank rooms in parallel. A group of multiple oil tank rooms (11) can be installed in the oil tank room.

[0050] The temperature range in the high temperature tank can be 35°C to 150°C, the temperature range in the normal temperature tank can be 15°C to 35°C, and the temperature range in the low temperature tank can be -50°C to 15°C. Multiple high temperature and low temperature tanks can be installed to create a temperature gradient, which can facilitate the transfer and conversion of heat by the heat pump.

[0051] The energy collection system (20) is connected to the energy exchange system (40), which is connected to the energy storage system (30) and used to collect thermal energy, the high temperature oil storage tank (11) is connected to the energy conversion system (40), which supplies heat through heat exchange and stores energy underground, while the oil input / output pipes (14) between the high temperature oil storage tank (11) and other tanks are connected, and the oil (12) in the high temperature oil storage tank (11) is input into the normal temperature tank after heat exchange, so that it can be adjusted and stored and used at any time. When summer ends, the heat can be stored in the tank or underground using the heat collection system (20) or heat pump, and can be used by the energy conversion system (40) in winter.

[0052] The energy collection system (20) is connected to the energy exchange system (40), the energy exchange system (40) is connected to the energy storage system (30), which is used to collect and store cold energy, the low-temperature storage tank (11) is connected to the energy conversion system (40), which can supply cooling or store cold energy underground, and at the same time, piping is connected between the low-temperature tank and other tanks, so that the oil in the low-temperature tank can be put into the normal temperature tank and adjusted for use at any time. When winter is over, the heat pump can be used to store cold energy in the tank or underground, and when summer comes, it can be used by the energy conversion system (40).

[0053] The hot oil storage tank (11) and the cold oil storage tank (11) can be adjusted and converted as needed in a timely manner. For example, after the heat stored in the hot oil storage tank (11) is used in winter, it can be used as the cold oil storage tank (11) to store cold. Similarly, the cold oil storage tank (11) can be used as the hot oil storage tank (11) to store heat in summer after the cold is used, and the oil storage tank (11) can be adjusted to the temperature gradient of the hot oil storage tank (11) or the cold oil storage tank (11) in a timely manner, or the low-grade heat and cold can be converted into high-grade heat and cold by the heat pump, thereby fulfilling the purpose of oil storage and energy storage.

[0054] Those skilled in the art can combine the features of different embodiments described in this specification, for example, by using the components of each heat collection system and heat exchange / heat supply system in a unified and centralized manner, by using them mutually, or by connecting and using control valves and sensors, to realize timely use of smart adjustment.

[0055] Referring to FIG. 4, the oil storage tank (11) is a group of fire water tanks (19) or water tanks in a thermally insulated building, the oil pump room (15) is changed to a fire pump room (18), the oil input / output piping (14) is changed to an input / output water pipe (17), and in an emergency, the input water pipe (17) is also changed to an output water pipe (17) to increase the output water volume, and the building's hot water system 38 and / or ice storage system 39 can also be connected to an energy conversion system (40) to increase the energy storage capacity and equipment usage efficiency.

[0056] The oil storage tank is the building's fire water storage tank (19) group. The original fire pond is divided into several fire tank (19) groups, which are heat-insulated and energy-saving modified, and used for energy storage. The fire pond and fire tank are connected in parallel with piping lines. Like the oil storage tank group, the fire tank is also divided into high temperature tank, normal hot water tank and low hot water tank, which can be used for cold storage in winter and spring, air conditioning in summer, heat storage in summer and autumn, and heat supply in winter. It can use various advantageous resources in a timely manner to store cold and heat at any time, and can also supply hot water throughout the four seasons, improving the use efficiency of the equipment.

[0057] For example, one building used to have a 100-ton fire-fighting reservoir, but now it has designed (12) 10-ton water tanks, dividing them into high-temperature tanks, normal temperature tanks, and low-temperature tanks, and connecting them so that water can be adjusted and supplied to firefighting at any time in an emergency.

[0058] The temperature range in the high temperature tank is 35℃~75℃, the temperature range in the normal temperature tank is 15℃~35℃, and the temperature range in the low temperature tank is 0℃~15℃, and the above temperatures can be set and adjusted according to actual needs. Several high temperature and low temperature tanks can be installed to form a temperature gradient, which can facilitate the transport and exchange of heat by the heat pump, and can be easily docked with hot water systems and ice storage systems. For example, in this example, 10 water tanks are used for cold storage in summer, one for normal temperature and one for high temperature, and 10 water tanks are used for heat storage in winter, one for normal temperature and one for low temperature, to ensure the demand for firefighting water, and can also be converted and used at any time using peak valley electric energy storage.

[0059] Referring to FIG. 5, a group of fire water tanks (19) or an insulated underground water storage dam (101) can store energy in a timely manner, store water for emergencies, and pump out or irrigate for use at any time, while storing or supplying energy at the same time.

[0060] Referring to FIG. 6, the underground flood prevention storage dam is an artificial lake or dam (102) that has been thermally insulated. The artificial lake or dam is thermally insulated and has a structure (103) that can be opened to the water surface, and then the thermal insulation treatment is performed. The water surface structure (103) can also be equipped with solar energy collection equipment (21) and other uses.

[0061] Fire water tanks and reservoirs are thermally insulated underground flood prevention dams, or sewage dams, and also artificial lakes and pond dams. All above-ground groundwater bodies available in cities can be used. The structure can be partially open to the water surface, and energy-saving thermal treatment can be performed on the upper surface around the energy storage body to reduce the loss of stored heat. The structural surface can be used to install solar energy facilities, or plastic greenhouses and glass solar rooms for greening, beautification and cultivation can be built, which can be used to store cold in winter and spring, air conditioning in summer, heat storage in summer and autumn, and heat supply in winter. It can store energy at any time, store water during flood season, and store flood water, and use the stored water and heat to realize cultivation in all seasons, and also play a role in regulating floods and preventing drought.

[0062] In this application, unless otherwise expressly specified and limited, the terms "interconnect", "connection", "fixed" and the like should be understood in a broad sense, for example, a fixed connection, a removable connection, or an integral connection, or an electrical connection. They may be directly connected, indirectly connected via an intermediate medium, or may be communication inside two elements or an interaction relationship between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific situation.

[0063] In the description of the present invention, many specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, systems and techniques have not been shown in detail so as not to obscure an understanding of this description.

[0064] Finally, it should be noted that the above embodiments are only used to describe the technical solutions of the present invention, and are not intended to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may be modified, or some or all of the technical features may be replaced with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention, and all of these should be included in the scope of the claims and description of the present invention.

Claims

1. The oil storage and energy storage apparatus and method includes an oil storage system, an energy collection system, an energy storage system, and an energy conversion system, The oil storage system is used to store oil, and includes an oil storage tank group, oil, an oil inlet / outlet, an oil input / output pipe, and an oil pump room; The energy collection system is used to collect heat and cold, and includes a heat collection device, a cold collection device, energy input / output piping, and a medium in the piping. The form of collecting heat and cold includes one or more of the following energy collection forms: solar power generation energy collection, wind and solar power generation cannot consume electric power energy collection, industrial waste heat energy collection, peak valley electric energy collection, various heat pump energy collection, solar thermal energy heat collection, etc. The energy storage system includes a group of oil storage tanks modified for thermal insulation and oil in the oil tanks, or a group of oil storage tanks with specially designed thermal insulation and oil in the tanks, and oil input and output piping; The energy conversion system includes a heat exchanger, a heat pump, a circulation pump, a valve, oil input and output pipes, energy input and output pipes, and a medium in the pipes; The heat collector and the cold collector are connected to the energy exchange system, and the collected energy is input into the energy exchange system; The oil pump room's oil input and output piping leads to the exchange system, the energy storage system's oil input and output piping leads to the exchange system, and the oil input and output piping leads to the exchange system; The oil in the oil storage tank or the oil input from the oil pump room is driven by a pump and passes through the energy conversion system, the oil absorbs or releases energy as it passes through the energy conversion system, and the oil that absorbs or releases energy is heated or cooled. The energy conversion system controls the oil heating temperature or cooling temperature according to the type of oil and as necessary, and inputs the oil that absorbs or releases energy through the oil input / output piping into the oil storage tank of the energy storage system for storage, or outputs it to the oil pump room; An oil storage and energy storage device and method, characterized in that the energy absorbed or released by oil in an energy conversion system reduces or heats the medium in the energy input / output piping in the thermal energy conversion system, and is output for use by a user through the input / output piping of the energy conversion system by pump drive, or is output to another medium for storage or release.

2. The oil storage and energy storage device of claim 1, characterized in that the energy conversion system can be installed with multiple heat exchangers, the heat exchangers are connected in parallel to the oil input / output piping, and the corresponding valve switches can be controlled to select multiple heat exchanges, or select a heat exchanger to exchange heat or not to exchange heat, the oil passes directly through the oil input / output piping, the heat exchanger and the heat pump are used in series, and multiple heat pumps can be installed to improve the heat exchange efficiency.

3. The oil storage and energy storage device of claim 1, characterized in that the oil input and output piping of the oil storage system penetrates deep into the oil tank, and three-way valves are installed at appropriate positions at the bottom, middle and top of the piping to facilitate the input and output of oil at different heights of the oil tank.

4. The oil storage and energy storage device as described in claim 1, characterized in that the energy storage system includes an existing oil storage tank that has been thermally insulated and modified, and the oil in the oil tank, and can store energy by injecting water or other emergency media into the empty tank or when necessary.

5. The oil storage and energy storage device of claim 1, characterized in that the oil storage tank group of the energy storage system includes a plurality of high-temperature tanks, a room-temperature tank, and a low-temperature tank, and each oil storage tank of the energy storage system is connected in parallel to an oil input / output pipe, and valves are installed in the input / output pipes between each tank, and the opening and closing of each valve can be controlled to input oil of different temperatures into a specific oil storage tank to form a temperature gradient, or output oil in a specific oil tank to an oil pump room, thereby maximizing the energy storage capacity and the oil input / output efficiency.

6. The oil storage and energy storage device and method according to claim 5, characterized in that the oil storage tank is a group of fire water tanks or a group of water reservoirs in a building with thermal insulation treatment, the oil pump room is changed to a fire pump room, the oil input / output piping is changed to an input / output water pipe, and in an emergency, the input water pipe is also changed to an output water pipe to increase the output water volume, and the hot water system and / or ice storage system of the building can also be connected to the energy conversion system to increase the energy storage capacity and the equipment utilization efficiency.

7. The energy storage device and energy storage method using a group of fire water tanks or a group of reservoirs described in claim 6, characterized in that the group of fire water tanks or the group of reservoirs is an underground water storage dam with heat insulation treatment, and stores energy in a timely manner, stores water for emergencies, and uses it by pumping out or irrigating as needed, while storing or supplying energy.

8. The underground flood prevention storage dam is an artificial lake or dam that is constructed so that it can be opened to the water surface and then heat-insulated, and the water surface structure can be equipped with solar energy collection equipment or other uses. An energy storage device using an underground flood prevention storage dam as described in claim 7.

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