Mobile solid heat storage and storage battery coordinated island integrated energy system

Abstract

The invention provides a mobile solid heat storage and storage battery coordinated island comprehensive energy system, and belongs to the technical field of electric energy supply, the system comprises a heat storage and heat exchange unit, a heat exchange fan, a thermal insulation layer, an energy storage battery, a rapid power socket, an instrument cabinet, a water circulation system, a heat exchange water pump and an inverter, and the modular and container type design is adopted; and mobile deployment and flexible expansion are realized. According to the system, electric energy is converted into heat energy for storage through the heat storage and exchange unit, time-shifting storage of the electric energy is achieved by means of the energy storage battery, independent supply and efficient complementation of electric energy and heat energy are achieved through intelligent coordination control, electric power, high-temperature hot air and hot water can be stably output, and the diversified energy utilization requirements of remote areas, emergency disaster relief and field operation island scenes are met. According to the invention, the energy self-sufficiency rate and the energy consumption safety of the island scene are obviously improved, the operation cost is reduced, and the method is green and environment-friendly and has national defense, social and economic benefits.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric energy supply, in particular to a mobile solid heat storage and battery collaborative island comprehensive energy system. BACKGROUND

[0002] Due to the distance from the main power grid, energy supply in island scenarios (such as islands, border posts, remote villages and towns, field exploration bases, and temporary resettlement sites after disasters) has long faced many difficulties: traditional island energy consumption relies on diesel generators, which not only consume a lot of fuel and have high operating costs, but also produce noise and pollutant emissions, and have poor environmental protection; photovoltaic and wind power renewable energy has intermittency and volatility problems, making it difficult to achieve stable power supply; existing heat storage and energy storage systems are mostly independently designed, with separate supply of electric and thermal energy, and cannot achieve multi-energy complementation, resulting in low energy utilization efficiency; and most systems are fixed, have poor flexibility, and are difficult to adapt to the rapid energy demand of emergency rescue, field operation temporary scenarios, and have insufficient system reliability, which cannot guarantee the continuous operation of critical loads when a single energy supply is interrupted.

[0003] In view of the above problems, a highly integrated, flexible and reliable, multi-energy complementary island comprehensive energy system is needed to achieve independent supply and efficient management of electric and thermal energy, improve energy self-sufficiency and energy safety, reduce operating costs, and meet the diversified energy needs of various island scenarios. Therefore, a mobile solid heat storage and battery collaborative island comprehensive energy system is proposed. SUMMARY

[0004] The present application aims to solve the problems existing in the background art. In order to achieve the above-mentioned application purpose, the present application provides the following technical scheme: a mobile solid heat storage and battery collaborative island comprehensive energy system, a mobile solid heat storage and battery collaborative island comprehensive energy system, comprising a heat storage and heat exchange unit, a heat exchange fan, an insulation layer, an energy storage battery, a quick power outlet, an instrument cabinet, a water circulation system, a heat exchange water pump and an inverter; the insulation layer is wrapped on the outside of the heat storage and heat exchange unit, the heat exchange fan and the heat exchange water pump are connected with the heat storage and heat exchange unit respectively, the water circulation system forms a closed loop with the heat storage and heat exchange unit and the heat exchange water pump, the energy storage battery is electrically connected with the inverter, the quick power outlet is electrically connected with the inverter, and the instrument cabinet is electrically connected with the heat storage and heat exchange unit, the heat exchange fan, the energy storage battery, the heat exchange water pump and the inverter respectively, for monitoring and controlling the running state of each component.

[0005] As a preferred technical scheme of the present application, the heat storage and heat exchange unit uses high-density, high-heat-capacity industrial solid waste-based solid materials as the heat storage medium, has a heating / heat storage / heat release integrated structure, and uses a pure resistance heating method, which can use night valley electricity, surplus renewable energy power or standby generator power for heating, converting electric energy into heat energy storage.

[0006] As a preferred technical scheme of the present application, the structure design of the heat storage and exchange unit meets the requirement of preventing the circulation water from vaporization, the internal heat exchanger is not higher than the bottom plane of the heat storage body, and a base is adopted; the maximum heat storage temperature of the heat storage and exchange unit is 650 DEG C, the minimum heat extraction temperature is 180 DEG C, the rated working pressure is normal pressure, the working medium is softened water, and the outlet temperature of the working medium can be adjusted between 45 DEG C and 85 DEG C.

[0007] As a preferred technical scheme of the present application, the motor of the heat exchange fan uses a voltage of 380 V, and over-temperature, overload, over-current and open-phase protection measures are provided, and the fan speed can be frequency-controlled according to the feedback of the outlet water temperature of the heat storage and exchange unit; the heat exchange water pump cooperates with the water circulation system to realize the circulation flow of the working medium, and ensures the heat exchange efficiency.

[0008] As a preferred technical scheme of the present application, the heat insulation layer is used to reduce the heat energy loss of the heat storage and exchange unit, so that the surface temperature rise of the heat insulation cover shell of the heat storage and exchange unit is ≤40 DEG C, and long-time and low-loss heat energy storage is realized.

[0009] As a preferred technical scheme of the present application, the energy storage battery adopts a lithium ion battery, which is used to store the surplus power output by photovoltaic, wind power intermittent renewable energy generation or diesel generator, converts the direct current into alternating current through an inverter to supply power to external loads, and the fast power socket is used to realize the fast power supply connection of external equipment.

[0010] As a preferred technical scheme of the present application, the instrument cabinet integrates an intelligent control module and a monitoring module, supports automatic, manual and remote control operation modes, can collect and upload the operation parameters of each component of the system in real time through wired / wireless communication mode, and has the functions of abnormal early warning, automatic protection and linkage control.

[0011] As a preferred technical scheme of the present application, the system as a whole adopts a modular and container type design, has the characteristics of fast deployment, mobility and expandability, the high-voltage insulation withstand voltage reaches 20 KV / 150 Ma leakage current setting time / 1 minute, and there is no arc and flicker; the heat efficiency and electric heat efficiency of the heat storage and exchange unit body design are not less than 97%.

[0012] As a preferred technical scheme of the present application, the system can realize intelligent coupling operation, dynamically optimizes the charging and discharging strategy of the heat storage and exchange unit and the energy storage battery according to real-time energy supply and demand, weather prediction, load priority and operation cost, and realizes the multi-energy complementary mode of electric heat storage and heat-electricity decoupling.

[0013] As a preferred technical scheme of the present application, the rated heating power range of the heat storage and exchange unit is +5% / -10%, the heating power voltage can be adapted to 380V, 10kV-110KV, and the power supply conditions of different island scenes are adapted.

[0014] Compared with the prior art, the present application has the following advantages: 1. Multi-complementary, high energy utilization rate: breaking the traditional island system of electric and heat supply, realizing the cooperative operation of solid heat storage and battery energy storage, electric and heat energy can support each other, effectively stabilizing the renewable energy fluctuation, greatly improving the overall energy efficiency and renewable energy consumption capacity, and the heat storage equipment as a large-capacity, low-cost long-time energy storage carrier, makes up for the cost and scale limitation of battery in long-time energy storage.

[0015] 2. Flexible movement, convenient deployment: the overall system adopts modular and container design, has the characteristics of rapid deployment, mobility and scalability, can be flexibly transported to the designated place according to the energy demand of island scene, and is suitable for remote areas, emergency rescue, temporary or mobile energy scene in field operation, without complex infrastructure investment.

[0016] 3. High reliability, strong protection capability: the energy storage form of electric and heat double backup provides double energy protection for island scene, when the equipment is maintained or single energy supply is interrupted in extreme weather, the other energy can temporarily bear more load, significantly enhances the system disturbance resistance and power / heat supply reliability, and responds quickly in emergency.

[0017] 4. Low cost, efficient operation: by optimizing the energy time sequence, reducing the dependence and operation time of expensive fossil fuel generator set, reducing fuel consumption and maintenance cost; modular design can increase or decrease capacity according to load change, avoiding excessive initial investment; the application of industrial solid waste-based heat storage material further reduces the heat storage cost and improves the economy.

[0018] 5. Green and environmentally friendly, sustainable development: maximize the use of photovoltaic and wind power renewable energy, reduce noise, emissions and pollution generated by diesel generators, and be environmentally friendly; the application of industrial solid waste-based heat storage material realizes the resource utilization of solid waste, which meets the national green and low-carbon development strategy.

[0019] 6. Intelligent and controllable, convenient operation and maintenance: the instrument cabinet supports automatic, manual and remote control modes, can realize real-time monitoring, abnormal warning and automatic protection of system operation parameters, management personnel can remotely control the system operation state, realize unattended operation, reduce operation and maintenance cost and difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The present application provides a three-dimensional structure schematic diagram; Figure 2 An internal perspective view provided by the present application; Figure 3 An internal perspective view provided by the present application; Figure 4 An internal perspective view provided by the present application; Figure 5 An internal perspective view provided by the present application;

[0021] Indicated in the figure: 1, heat storage and exchange unit; 2, heat exchange fan; 3, thermal insulation layer; 4, energy storage battery; 5, quick power socket; 6, instrument cabinet; 7, water circulation system; 8, heat exchange water pump; 9, inverter. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments.

[0023] Therefore, the following detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but only represents some embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. It should be noted that the embodiments in the present application and the features and technical schemes in the embodiments can be combined with each other without conflict, and similar reference numerals and letters represent similar items in the following drawings, so that once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0024] Embodiment 1: A mobile solid heat storage and battery coordinated island comprehensive energy system, comprising a heat storage and exchange unit 1, a heat exchange fan 2, a thermal insulation layer 3, an energy storage battery 4, a quick power socket 5, an instrument cabinet 6, a water circulation system 7, a heat exchange water pump 8 and an inverter 9; the thermal insulation layer 3 is wrapped outside the heat storage and exchange unit 1, the heat exchange fan 2 and the heat exchange water pump 8 are connected with the heat storage and exchange unit 1 respectively, the water circulation system 7 forms a closed loop circuit with the heat storage and exchange unit 1 and the heat exchange water pump 8, the energy storage battery 4 is electrically connected with the inverter 9, the quick power socket 5 is electrically connected with the inverter 9, the instrument cabinet 6 is electrically connected with the heat storage and exchange unit 1, the heat exchange fan 2, the energy storage battery 4, the heat exchange water pump 8 and the inverter 9 respectively, for monitoring and controlling the running state of each component.

[0025] The heat storage and exchange unit 1 uses high-density and high-heat-capacity industrial solid waste-based solid materials as a heat storage medium, has a heating / heat storage / heat release integrated structure, adopts a pure resistance heating mode, can use night valley electricity, surplus renewable energy electricity or standby generator electricity for heating, and stores electric energy into heat energy.

[0026] The heat storage and exchange unit 1 is designed to meet the requirement of preventing the circulation water from being vaporized, the internal heat exchanger is not higher than the bottom plane of the heat storage body, and a base is used; the maximum heat storage temperature of the heat storage and exchange unit 1 is 650 DEG C, the minimum heat extraction temperature is 180 DEG C, the rated working pressure is normal pressure, the working medium is softened water, and the outlet temperature of the working medium can be adjusted between 45 DEG C and 85 DEG C.

[0027] The motor of the heat exchange fan 2 uses a voltage of 380 V, has over-temperature, overload, over-current and open-phase protection measures, and the fan speed can be frequency-controlled according to the feedback of the outlet water temperature of the heat storage and exchange unit 1; the heat exchange water pump 8 cooperates with the water circulation system 7 to realize the circulation flow of the working medium and ensure the heat exchange efficiency.

[0028] The heat preservation layer 3 is used to reduce the heat energy loss of the heat storage and exchange unit 1, so that the surface temperature rise of the heat storage and exchange unit 1 is less than or equal to 40 DEG C, and long-time and low-loss heat energy storage is realized.

[0029] The energy storage battery 4 uses lithium ion batteries, is used to store surplus power output by photovoltaic, wind power intermittent renewable energy power generation or diesel generator, converts direct current into alternating current through the inverter 9, supplies power to external loads, and the quick power socket 5 is used to realize quick power supply connection of external equipment.

[0030] The instrument cabinet 6 integrates intelligent control modules and monitoring modules, supports automatic, manual and remote control operation modes, can collect and upload the operation parameters of each component of the system in real time through wired / wireless communication mode, has abnormal early warning, automatic protection and linkage control functions.

[0031] The system as a whole adopts a modular and container type design, has the characteristics of quick deployment, mobility and scalability, the high-voltage insulation withstand voltage reaches 20 KV / 150 Ma leakage current setting time / 1 minute, and there is no arc and flicker; the heat efficiency and electric heating efficiency of the heat storage and exchange unit 1 are not less than 97%.

[0032] The system can realize intelligent coupling operation, dynamically optimizes the charging and discharging strategy of the heat storage and exchange unit 1 and the energy storage battery 4 according to real-time energy supply and demand, weather prediction, load priority and operation cost, and realizes a multi-energy complementary mode of electric heat storage and heat-electricity decoupling.

[0033] The rated heating power range of the heat storage and exchange unit 1 is +5% / -10%, and the heating power voltage can be adapted to 380V, 10kV-110KV, and the power supply conditions of different island scenes are adapted.

[0034] Embodiment 2: A mobile solid heat storage and battery coordinated island comprehensive energy system, comprising a heat storage and exchange unit 1, a heat exchange fan 2, a thermal insulation layer 3, an energy storage battery 4, a quick power socket 5, an instrument cabinet 6, a water circulation system 7, a heat exchange water pump 8 and an inverter 9; each component works cooperatively to form an integrated island energy supply system of electricity and heat, and the specific connection relationship and functions are as follows: The heat storage and exchange unit 1 is the heat energy storage and exchange core of the system, uses high-density and high-thermal-capacity industrial solid waste-based solid materials as the heat storage medium, has a heating / heat storage / heat release integrated structure, and adopts a pure resistance heating mode. The structure design meets the requirements of preventing the circulation of water vaporization, the internal heat exchanger is not higher than the bottom plane of the heat storage body, and a base is adopted to ensure the operation stability. The heat storage and exchange unit 1 can use night valley electricity, surplus renewable energy power or standby generator power for heating, convert the electric energy into heat energy and store it in the solid heat storage medium; when heating is needed, the heat energy is released through the cooperation of the heat exchange fan 2, the heat exchange water pump 8 and the water circulation system 7, and high-temperature hot air and hot water can be output to meet the diversified heating, industrial process heat or domestic hot water demand.

[0035] The key performance parameters of the heat storage and exchange unit 1 are as follows: the rated heating power range is +5% / -10%; the maximum heat storage temperature is 650℃, and the minimum heat extraction temperature is 180℃; the rated working pressure is normal pressure; the working medium is softened water, and the outlet temperature of the working medium can be adjusted between 45℃ and 85℃; the design thermal efficiency and electric heating thermal efficiency are not less than 97%; and the heating power voltage can be adapted to 380V, 10kV-110KV.

[0036] The heat exchange fan 2 is connected with the heat storage and exchange unit 1, and is used for accelerating the heat energy release and heat exchange process of the heat storage and exchange unit 1. The motor uses 380V power, and has over-temperature, overload, over-current and open-phase protection measures. The frequency conversion speed can be adjusted according to the water temperature feedback of the heat storage and exchange unit 1 to ensure the heat exchange efficiency and operation safety. The heat exchange water pump 8 is connected with the heat storage and exchange unit 1 and the water circulation system 7 to form a closed loop, and is used for driving the softened water in the water circulation system 7 to flow to realize the transfer and transportation of heat energy and ensure the stability of hot water supply.

[0037] The thermal insulation layer 3 is wrapped outside the heat storage and exchange unit 1, and is used for reducing the heat energy loss of the heat storage and exchange unit 1 to ensure that the solid heat storage medium can realize long-time and low-loss heat energy storage. The design requirement is that the surface temperature rise of the heat storage and exchange unit 1 insulation outer shell is ≤40℃, which effectively improves the heat energy storage efficiency and reduces energy waste.

[0038] The energy storage battery 4 adopts a lithium ion battery high-efficiency electrochemical energy storage technology, is the core of the electric energy storage of the system, is used for storing the surplus power of the photovoltaic, wind power intermittent renewable energy generation or diesel generator output, and realizes time shift storage of the electric energy. The inverter 9 is electrically connected with the energy storage battery 4, is used for converting the direct current output by the energy storage battery 4 into alternating current, and meets the power demand of the external alternating current load; the fast power socket 5 is electrically connected with the inverter 9, is used for realizing the fast power supply connection of the external equipment, and improves the emergency power supply convenience of the system.

[0039] The instrument cabinet 6 is the control and monitoring core of the system, is electrically connected with the heat storage and heat exchange unit 1, the heat exchange fan 2, the energy storage battery 4, the heat exchange water pump 8 and the inverter 9, and integrates an intelligent control module and a monitoring module. The instrument cabinet 6 supports automatic, manual and remote three control operation modes, can upload the geographic position, the environmental temperature, the air pressure intensity, the energy storage amount, the water supply temperature, the running state and the running frequency of the circulating pump and the water supply pump, the electric regulating valve opening degree unit parameter of the mobile heat storage equipment to the central management station in real time through the wired / wireless communication mode, is connected with the automatic control system, and carries out online monitoring on the running state of the heat storage device. Meanwhile, the instrument cabinet 6 has the functions of water supply temperature overhigh / overlow early warning, water tank liquid level overlow early warning, water supply pressure overpressure early warning, overpressure automatic pressure relief, power failure automatic protection and linkage, the management personnel can optimize the setting of the system control parameters through the two-way communication of the monitoring center upper computer and the field controller, and ensure that the system is always in the best running state.

[0040] The water circulation system 7 forms a closed loop with the heat storage and heat exchange unit 1 and the heat exchange water pump 8, takes softened water as the working medium, is used for realizing the transmission and transportation of heat energy, transmits the heat energy stored in the heat storage and heat exchange unit 1 to the area or equipment needing heat supply, and can recover the waste heat at the same time, and improves the energy utilization rate of the system.

[0041] The system realizes the collaborative operation of the heat storage and heat exchange unit 1 and the energy storage battery 4 through the intelligent coordinated control of the instrument cabinet 6, and the main working modes are as follows: The energy storage battery 4 is controlled by the instrument cabinet 6 to store the surplus electric energy, and at the same time, the remaining electric energy is used to drive the pure resistance heating device of the heat storage and heat exchange unit 1 to convert the electric energy into heat energy and store the heat energy in the solid heat storage medium, so that the electric energy and the heat energy are stored synchronously, and the renewable energy consumption rate is improved.

[0042] Energy supply mode: When there is no wind and light resource, at night or when the generator does not run, the instrument cabinet 6 controls the discharge of the energy storage battery 4 according to the load demand, converts the direct current into alternating current through the inverter 9, and supplies power to the external alternating current load, and the fast power outlet 5 can synchronously provide emergency power supply for small equipment; at the same time, according to the heat supply demand, the heat exchange fan 2 and the heat exchange pump 8 are controlled to run, the water circulation system 7 is driven to work, the heat energy stored in the heat storage and heat exchange unit 1 is released, hot water or hot air is output, and the heating and domestic hot water demand is met.

[0043] Intelligent adjustment mode: The instrument cabinet 6 dynamically optimizes the charging and discharging strategy of the heat storage and heat exchange unit 1 and the energy storage battery 4 according to the real-time energy supply and demand situation, weather forecast, load priority and operation cost, realizes the coupling of electricity and heat, suppresses the fluctuation of renewable energy, ensures the stability and efficiency of electricity and heat supply, and realizes the energy scheduling goal of peak load shifting.

[0044] The application scenarios of the system are wide, and the system is mainly suitable for the following island scenarios: Off-grid area: island, border outpost, remote town and village area without stable power grid coverage, used for building micro-grid to realize independent supply of electricity and heat energy.

[0045] Field operation: mineral exploitation, field exploration, field training temporary operation base, providing stable electricity and heat supply for operation equipment and personnel life.

[0046] Emergency rescue: post-disaster emergency command center, temporary medical point and temporary resettlement point scene, providing fast and stable emergency power supply and heat supply guarantee.

[0047] Special demand scene: factory, farm or community with stable demand for electricity and heat and weak power grid, improving energy independence and supply reliability.

[0048] The present application realizes the synchronous storage, intelligent regulation and efficient supply of electricity and heat energy through the collaborative design of the heat storage and heat exchange unit 1 and the energy storage battery 4 components. The system adopts modular and container type design, has the characteristics of fast deployment, mobility and scalability, solves many pain points of the existing island energy system through the multi-energy complementary mode of "storing heat with electricity and decoupling electricity and heat", significantly improves the energy self-sufficiency rate, energy safety and energy utilization rate, reduces the operation cost, and is green and environmentally friendly.

[0049] Embodiment 3: a mobile solid heat storage and battery collaborative island integrated energy system, comprising a heat storage and heat exchange unit 1, a heat exchange fan 2, a thermal insulation layer 3, an energy storage battery 4, a quick power socket 5, an instrument cabinet 6, a water circulation system 7, a heat exchange water pump 8 and an inverter 9; the thermal insulation layer 3 is wrapped outside the heat storage and heat exchange unit 1, the heat exchange fan 2 and the heat exchange water pump 8 are connected with the heat storage and heat exchange unit 1 respectively, the water circulation system 7 forms a closed loop with the heat storage and heat exchange unit 1 and the heat exchange water pump 8, the energy storage battery 4 is electrically connected with the inverter 9, the quick power socket 5 is electrically connected with the inverter 9, and the instrument cabinet 6 is electrically connected with the heat storage and heat exchange unit 1, the heat exchange fan 2, the energy storage battery 4, the heat exchange water pump 8 and the inverter 9 respectively, for monitoring and controlling the running state of each component; the electric-thermal collaborative supply and demand balance of the system satisfies the following formula: ; Wherein: Q is the total heat storage amount of the heat storage and heat exchange unit 1 at time t, with the unit of kJ; η is the electric energy-thermal energy conversion efficiency, with no unit and the value range of 0.95-0.98; P is the discharging power of the energy storage battery 4 at time t, with the unit of kW; Δt is the time interval, with the unit of h; Q is the system heat load power at time t, with the unit of kW; K is the comprehensive heat transfer coefficient of the thermal insulation layer 3, with the unit of W / (m 2 ·℃); A is the heat dissipation surface area of the heat storage and heat exchange unit 1, with the unit of m 2 ; T is the internal heat storage medium temperature of the heat storage and heat exchange unit 1 at time t, with the unit of ℃; T is the ambient temperature at time t, with the unit of ℃; Q is the system other heat loss amount at time t, with the unit of kJ.

[0050] The heat storage and heat exchange unit 1 uses high-density and high-heat-capacity industrial solid waste-based solid materials as heat storage medium, is of heating / heat storage / heat releasing integrated structure, adopts pure resistance heating mode, can use night valley electricity, surplus renewable energy power or standby generator power for heating, and stores electric energy into heat energy; the total heat storage amount calculation formula of the heat storage and heat exchange unit 1 is: ; Wherein: Q is the maximum total heat storage amount of the heat storage and heat exchange unit 1, with the unit of MWh; Density of the industrial solid waste-based heat storage medium, unit: kg / m 3 ; Effective volume of the heat storage medium, unit: m 3 ; Specific heat capacity of the heat storage medium at constant pressure, unit: J / (kg·℃); The highest heat storage temperature of the heat storage and heat exchange unit 1, unit: ℃, taking 650℃; The lowest heat extraction temperature of the heat storage and heat exchange unit 1, unit: ℃, taking 180℃.

[0051] The structural design of the heat storage and heat exchange unit 1 meets the requirements of preventing the circulation of water from being vaporized, the internal heat exchanger is not higher than the bottom plane of the heat storage body, and a base is adopted; the highest heat storage temperature of the heat storage and heat exchange unit 1 is 650℃, the lowest heat extraction temperature is 180℃, the rated working pressure is normal pressure, the working medium is softened water, and the outlet temperature of the working medium can be adjusted between 45℃ and 85℃; the heat release power calculation formula of the heat storage and heat exchange unit 1 is: ; Among them: The heat release power of the heat storage and heat exchange unit 1 at time t, unit: MW; Thermal conductivity of the heat exchanger heat exchange pipe, unit: W / (m·℃); Effective heat exchange area of the heat exchanger heat exchange pipe, unit: m 2 ; The temperature of the heat storage medium at time t, unit: ℃; The temperature of the softened water at time t, unit: ℃; The wall thickness of the heat exchanger heat exchange pipe, unit: m; Density of the softened water, unit: kg / m 3 ; Effective volume of the softened water in the water circulation system 7, unit: m 3 ; Specific heat capacity of the softened water at constant pressure, unit: J / (kg·℃); The change rate of the softened water temperature with time, unit: ℃ / s.

[0052] The motor of the heat exchange fan 2 has a voltage of 380V, and has over-temperature, overload, over-current and open-phase protection measures, and the fan speed can be frequency-regulated according to the feedback of the outlet water temperature of the heat storage and heat exchange unit 1; the heat exchange water pump 8 cooperates with the water circulation system 7 to realize the circulation of the working medium and ensure the heat exchange efficiency; the frequency-regulated speed calculation formula of the heat exchange fan 2 is: ; Wherein: is the actual speed of the heat exchange fan 2 at time t, with the unit of r / min; is the rated maximum speed of the heat exchange fan 2, with the unit of r / min; is the set outlet temperature of the softened water, with the unit of ℃; is the actual outlet temperature of the softened water at time t, with the unit of ℃; is the minimum allowable outlet temperature of the softened water, with the unit of ℃, taking 45℃; is the fan power correction coefficient, with no unit, taking the range of 0.05-0.1; is the actual operating power of the heat exchange fan 2 at time t, with the unit of kW; is the rated power of the heat exchange fan 2, with the unit of kW.

[0053] The heat preservation layer 3 is used to reduce the heat loss of the heat storage and heat exchange unit 1, so that the surface temperature rise of the heat preservation outer shell of the heat storage and heat exchange unit 1 is ≤40℃, and long-time and low-loss heat storage is realized; the heat loss and surface temperature rise of the heat preservation layer 3 satisfy the following formula: and ; Wherein: is the heat loss of the heat preservation layer 3 at time t, with the unit of kJ; is the temperature of the heat storage medium at time t, with the unit of ℃; is the outer surface temperature of the heat preservation layer 3 at time t, with the unit of ℃; is the thickness of the inner layer of the heat preservation layer 3, with the unit of m; is the thermal conductivity coefficient of the inner layer material of the heat preservation layer 3, with the unit of W / (m·℃); is the thickness of the outer layer of the heat preservation layer 3, with the unit of m; is the thermal conductivity coefficient of the outer layer material of the heat preservation layer 3, with the unit of W / (m·℃); A is the covered surface area of the thermal insulation layer 3, with units of m 2 ; h is the convective heat transfer coefficient between the outer surface of the thermal insulation layer 3 and the environment, with units of W / (m 2 ·℃); t is the time interval, with units of h; T is the temperature rise of the outer surface of the thermal insulation layer 3 at time t, with units of ℃; T0 is the ambient temperature at time t, with units of ℃.

[0054] The energy storage battery 4 is a lithium ion battery, which is used to store surplus power output by photovoltaic, wind power intermittent renewable energy generation or diesel generator, and converts direct current into alternating current through the inverter 9 to supply power to external loads. The fast power outlet 5 is used to realize the fast power supply connection of external equipment; the remaining power and charge-discharge power of the energy storage battery 4 satisfy the following formula: ; Wherein: S is the percentage of the remaining power of the energy storage battery 4 at time t, with no unit and a value range of 0.2-0.95; S0 is the initial percentage of the remaining power of the energy storage battery 4, with no unit; C is the rated capacity of the energy storage battery 4, with units of kWh; η is the charging efficiency of the energy storage battery 4, with no unit and a value range of 0.92-0.96; P is the charging power of the energy storage battery 4 at time t, with units of kW; η is the discharging efficiency of the energy storage battery 4, with no unit and a value range of 0.92-0.96; P is the discharging power of the energy storage battery 4 at time t, with units of kW; dt is the integral time infinitesimal, with units of h.

[0055] The instrument cabinet 6 integrates an intelligent control module and a monitoring module, supports automatic, manual and remote control operation modes, can collect and upload the operation parameters of each component of the system in real time through wired / wireless communication mode, has abnormal early warning, automatic protection and linkage control functions; the intelligent linkage control strategy of the instrument cabinet 6 satisfies the following formula: ; Wherein: V is the control voltage signal output by the instrument cabinet 6 at time t, and the unit is V; K is a proportional coefficient, and the value range is 5-15; Δ is the deviation of the actual operating parameter of the system at time t from the set value, and the unit is ℃ temperature deviation or kW power deviation; T is an integral time constant, and the unit is min; D is a differential time constant, and the unit is min; I is the integral value of the deviation, and the unit is ℃·min or kW·min; D is the rate of change of the deviation with time, and the unit is ℃ / min or kW / min.

[0056] The system as a whole adopts modular and container design, has the characteristics of rapid deployment, mobility and scalability, the high-voltage insulation withstand voltage reaches 20KV / 150Ma leakage current setting time / 1 minute, without arc and flicker; the heat storage and heat exchange unit 1 has a design heat efficiency and electric heating heat efficiency of not less than 97%; the calculation formula of the electric heating conversion efficiency and the body heat efficiency of the heat storage and heat exchange unit 1 is: And ; Wherein: η is the electric heating conversion efficiency, and the unit is ≥97%; Q is the total amount of heat energy actually stored by the heat storage and heat exchange unit 1, and the unit is kJ; P is the heating power of the heat storage and heat exchange unit 1, and the unit is kW; t is the heating time, and the unit is h; η is the body heat efficiency of the heat storage and heat exchange unit 1, and the unit is ≥97%; Q is the total amount of heat energy actually output by the heat storage and heat exchange unit 1, and the unit is kJ; Q is the total heat loss of the heat storage and heat exchange unit 1, and the unit is kJ.

[0057] The system can realize intelligent coupling operation, dynamically optimize the charging and discharging strategy of the heat storage and heat exchange unit 1 and the energy storage battery 4 according to real-time energy supply and demand, weather prediction, load priority and operation cost, and realize the multi-energy complementary mode of "storing heat with electricity and decoupling heat and electricity"; the intelligent coupling optimization objective function and constraint conditions of the system are as follows: Optimization objective function , constraint condition , , ; wherein: is the total running cost of the system per unit of time, with units of yuan / h; is the optimization period, with units of h; is the fuel cost coefficient of the diesel generator, with units of yuan / (kW·h); is the output power of the diesel generator at time τ, with units of kW; is the system maintenance cost coefficient, with units of yuan / (kW·h); is the total running power of the system at time τ, with units of kW; is the cost coefficient of the loss of renewable energy curtailment, with units of yuan / (kW·h); is the total output of renewable energy photovoltaic and wind power at time τ, with units of kW; is the heating power of the heat storage and heat exchange unit 1 at time τ, with units of kW; represents taking a non-negative value; is the maximum heating power of the heat storage and heat exchange unit 1, with units of kW; is the maximum charging power of the energy storage battery 4, with units of kW; is the maximum discharging power of the energy storage battery 4, with units of kW.

[0058] The rated heating power range of the heat storage and heat exchange unit 1 is +5% / -10%, and the heating power voltage can be adapted to 380V, 10kV-110KV, and the power supply conditions of different island scenarios; The heating power regulation range and voltage adaptability of the heat storage and heat exchange unit 1 satisfy the following formula: and ; wherein: is the rated heating power of the heat storage and heat exchange unit 1, with units of kW; is the actual heating power of the heat storage and heat exchange unit 1 at time t, with units of kW; is the heating power voltage of the heat storage and heat exchange unit 1 at time t, with units of V, adapted to 380V, 10kV-110KV, i.e. 380V≤ ≤110000V; is the heating loop efficiency, with no unit and a value range of 0.98-0.99; The total resistance value of the heating resistor of the heat storage and exchange unit 1 is Ω.

[0059] The above examples are only used to illustrate the technical solutions described in the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the above examples, the present application is not limited to the above specific embodiments. Therefore, any modification or substitution of the present application; and all technical solutions and improvements that do not deviate from the spirit and scope of the application are encompassed in the scope of the claims of the present application.

Claims

1. A mobile solid thermal storage and battery-integrated islanded integrated energy system, characterized in that, The system includes a heat storage heat exchange unit (1), a heat exchange fan (2), an insulation layer (3), an energy storage battery (4), a fast power socket (5), an instrument cabinet (6), a water circulation system (7), a hot water pump (8), and an inverter (9). The insulation layer (3) is wrapped around the outside of the heat storage heat exchange unit (1). The heat exchange fan (2) and the hot water pump (8) are respectively connected to the heat storage heat exchange unit (1). The water circulation system (7) forms a closed loop with the heat storage heat exchange unit (1) and the hot water pump (8). The energy storage battery (4) is electrically connected to the inverter (9). The fast power socket (5) is electrically connected to the inverter (9). The instrument cabinet (6) is electrically connected to the heat storage heat exchange unit (1), the heat exchange fan (2), the energy storage battery (4), the hot water pump (8), and the inverter (9) respectively, and is used to monitor and control the operating status of each component.

2. The islanded integrated energy system combining mobile solid thermal storage and battery as described in claim 1, characterized in that, The heat storage heat exchange unit (1) uses high-density, high-heat-capacity industrial solid waste-based solid materials as the heat storage medium. It is an integrated structure of heating / heat storage / heat release, and adopts a pure resistance heating method. It uses off-peak electricity at night, surplus renewable energy electricity or backup generator electricity for heating, and converts electrical energy into thermal energy for storage.

3. The islanded integrated energy system combining mobile solid thermal storage and battery as described in claim 2, characterized in that, The structure of the heat storage heat exchange unit (1) meets the requirements for preventing the vaporization of circulating water. Its internal heat exchanger is not higher than the bottom plane of the heat storage body and adopts a base design. The maximum heat storage temperature of the heat storage heat exchange unit (1) is 650℃, the minimum heat extraction temperature is 180℃, the rated working pressure is atmospheric pressure, the working medium is softened water, and the outlet temperature of the working medium is adjustable between 45℃ and 85℃.

4. The islanded integrated energy system combining mobile solid thermal storage and battery as described in claim 3, characterized in that, The heat exchange fan (2) uses a 380V motor and is equipped with over-temperature, overload, overcurrent and phase loss protection measures. The fan speed can be adjusted by frequency conversion according to the feedback of the outlet water temperature of the heat storage heat exchange unit (1). The heat exchange water pump (8) works in conjunction with the water circulation system (7) to realize the circulation of the working medium and ensure heat exchange efficiency.

5. The islanded integrated energy system combining mobile solid thermal storage and battery as described in claim 4, characterized in that, The insulation layer (3) is used to reduce the heat loss of the heat storage heat exchange unit (1) so that the surface temperature rise of the heat storage heat exchange unit (1) insulation shell is ≤40℃, and realize long-term, low-loss heat storage.

6. The islanded integrated energy system combining mobile solid thermal storage and battery as described in claim 5, characterized in that, The energy storage battery (4) is a lithium-ion battery used to store surplus power from photovoltaic, wind power, intermittent renewable energy generation, or diesel generator output. The inverter (9) converts DC power into AC power to supply power to external loads. The fast power socket (5) is used to realize fast power supply connection for external devices.

7. The islanded integrated energy system combining mobile solid thermal storage and battery as described in claim 6, characterized in that, The instrument cabinet (6) integrates an intelligent control module and a monitoring module, supports three control operation modes: automatic, manual, and remote. It collects and uploads the operating parameters of each component of the system in real time through wired / wireless communication mode, and has abnormal early warning, automatic protection and linkage control functions.

8. The islanded integrated energy system combining mobile solid thermal storage and battery as described in claim 7, characterized in that, The system adopts a modular, containerized structure. The high voltage insulation withstand voltage reaches 20KV / 150Ma. When the leakage current is set at 1 minute, there is no arcing or flickering. The thermal efficiency and electrothermal efficiency of the heat storage heat exchange unit (1) are both not less than 97%.

9. A mobile solid thermal storage and battery-assisted islanded integrated energy system according to any one of claims 1-8, characterized in that, The system dynamically optimizes the charging and discharging strategies of the thermal storage heat exchange unit (1) and the energy storage battery (4) based on real-time energy supply and demand, weather forecasts, load priorities and operating costs, in order to achieve a multi-energy complementary mode of electric thermal storage and thermoelectric decoupling.

10. The islanded integrated energy system combining mobile solid thermal storage and battery as described in claim 9, characterized in that, The rated heating power range of the heat storage heat exchange unit (1) is +5% / -10%, and the heating power supply voltage is compatible with 380V, 10kV~110KV, adapting to the power supply conditions of different isolated scenarios.

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