技术领域Technical Field
本发明涉及熔融盐蓄热技术，具体涉及一种混合式蓄热与放热一体罐。The invention relates to a molten salt heat storage technology, and in particular to a hybrid heat storage and heat release integrated tank.
背景技术Background technique
随着社会现代化进程加快，国内供电峰谷差日趋拉大，电力工业的发展和电力供求问题日益突出。电网公司推行峰谷分时电价政策，引导用户多用低谷电，减轻电网的供电压力。用户侧要充分使用低谷电就必须依靠相应的技术、设备。With the acceleration of social modernization, the difference between peak and valley power supply in China is widening, and the development of the power industry and the problem of power supply and demand are becoming increasingly prominent. The power grid company implements the peak-valley time-of-use electricity price policy to guide users to use more valley power and reduce the power supply pressure of the power grid. If the user side wants to make full use of valley power, it must rely on corresponding technologies and equipment.
熔融盐蓄能技术是一种“电力削峰填谷”有效的技术手段，它具有成本低、热容高、安全性好等特点。常见的蓄热方式有显热蓄热、相变蓄热、化学蓄热三种。现阶段，采用显热蓄热技术的双罐蓄热系统最为成熟，此系统是把冷罐和热罐分别放置，技术风险低。然而双罐蓄热装置要制造两个储罐，且冷热罐体之间连接管路冗杂，需要驱动泵来输送熔融盐，导致装置的制造费用和运行维护成本高。为解决上述问题，提出了单罐蓄热系统，单罐蓄热系统中热流体在罐顶部，冷流体在罐底部，在蓄热和放热过程中，冷热流体相接触，在接触区形成斜温层，起到热阻的作用，通过斜温层的移动来进行热量的蓄热和释放。与双罐蓄热系统相比，单罐蓄热系统简化了装置，降低了制造运行费用。但是，由于传统单罐系统仅利用显热蓄热方式，依靠蓄热材料的温度变化来进行热量贮存的，蓄热密度小，热量不能长时间储存致使单罐系统单位面积蓄热量和放热量小；传统单罐系统在蓄热过程中利用斜温层将冷热熔融盐分隔开，在实际运行中存在冷热熔融盐的直接接触导致蓄热量减少以及斜温层的厚度难以保持等问题；此外，传统单罐系统中蓄热储罐仅存在蓄热功能，需要在外部设置换热装置，通过管道、驱动泵以及阀门输送熔盐进入换热装置，附件制造费用高。Molten salt energy storage technology is an effective technical means of "peak shaving and valley filling of electricity". It has the characteristics of low cost, high heat capacity and good safety. Common heat storage methods include sensible heat storage, phase change heat storage and chemical heat storage. At present, the double-tank heat storage system using sensible heat storage technology is the most mature. This system places the cold tank and the hot tank separately, and has low technical risks. However, the double-tank heat storage device requires the manufacture of two storage tanks, and the connecting pipes between the cold and hot tanks are complicated. A pump is required to transport molten salt, resulting in high manufacturing costs and operation and maintenance costs of the device. In order to solve the above problems, a single-tank heat storage system is proposed. In the single-tank heat storage system, the hot fluid is at the top of the tank and the cold fluid is at the bottom of the tank. During the heat storage and heat release process, the cold and hot fluids contact each other, forming a temperature gradient layer in the contact area, which plays a role of thermal resistance. The heat is stored and released through the movement of the temperature gradient layer. Compared with the double-tank heat storage system, the single-tank heat storage system simplifies the device and reduces the manufacturing and operation costs. However, since the traditional single-tank system only uses sensible heat storage and relies on the temperature change of the heat storage material to store heat, the heat storage density is small and the heat cannot be stored for a long time, resulting in small heat storage and heat release per unit area of the single-tank system; the traditional single-tank system uses a thermocline layer to separate the cold and hot molten salts during the heat storage process. In actual operation, there are problems such as direct contact between the cold and hot molten salts, resulting in a reduction in heat storage and difficulty in maintaining the thickness of the thermocline layer; in addition, the heat storage tank in the traditional single-tank system only has a heat storage function, and a heat exchange device needs to be installed externally to transport the molten salt into the heat exchange device through pipes, drive pumps and valves, and the manufacturing cost of accessories is high.
发明内容Summary of the invention
本发明的目的在于提供一种混合式蓄热与放热一体罐，将显热蓄热方式和相变蓄热方式结合提高整体装置的蓄热量；同时，将原有复杂的蓄热系统简化成一个放热和蓄热的一体化设备。The purpose of the present invention is to provide a hybrid heat storage and heat release integrated tank, which combines the sensible heat storage method and the phase change heat storage method to improve the heat storage capacity of the overall device; at the same time, the original complex heat storage system is simplified into an integrated heat release and heat storage device.
为了达到上述发明目的，本发明采用的技术方案是：In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:
本发明包括蓄热储罐部件、浸没式蛇管换热器和相变换热器部件；蓄热储罐部件：主要由带保温层的蓄热罐体、圆形隔板、多根导轨、与多根导轨相同个数的直线轴承、搅拌器、两台抽吸泵、两根接管、两个抽吸式电加热器、两根外部管道和上下环形凸台组成；同一圆周上均布有多根导轨固定在蓄热罐体上下侧面间，蓄热罐体内壁设有上下环形凸台，圆形隔板分别通过直线轴承能沿各自导轨在上下环形凸台间滑动；两个对称布置的抽吸式电加热器经各自接管从蓄热罐体的下侧面接入罐内，两个抽吸式电加热器分别通过各自抽吸泵和各自外部管道从蓄热罐体上侧面接入罐内，浸没式蛇管换热器穿过圆形隔板孔后装在蓄热罐体中心，浸没式蛇管换热器下面依次同轴装有搅拌器和相变换热器部件，蓄热罐体的上端面与下端面分别设有传热介质注入口和传热介质排出口，蓄热罐体内充满熔融盐，熔融盐在各自抽吸泵作用下进入各自抽吸式加热器进行加热之后，由各自泵体输送到蓄热储罐的上方，形成高温熔融盐区，底部未加热部分则为低温熔融盐区，高温熔融盐区和低温熔融盐区用隔板进行分隔；传热介质注入口与浸没式蛇管换热器入口管道连接，浸没式蛇管换热器出口与相变换热器入口连接。The present invention includes a heat storage tank component, an immersed coil heat exchanger and a phase change heat exchanger component; the heat storage tank component: mainly composed of a heat storage tank body with a heat insulation layer, a circular partition, a plurality of guide rails, a linear bearing of the same number as the plurality of guide rails, an agitator, two suction pumps, two connecting pipes, two suction electric heaters, two external pipes and upper and lower annular bosses; a plurality of guide rails are evenly distributed on the same circumference and fixed between the upper and lower side surfaces of the heat storage tank body, and the inner wall of the heat storage tank body is provided with upper and lower annular bosses, and the circular partitions can slide between the upper and lower annular bosses along their respective guide rails through linear bearings; two symmetrically arranged suction electric heaters are connected to the tank from the lower side surface of the heat storage tank body through their respective connecting pipes, and the two suction electric heaters are respectively connected from the lower side surface of the heat storage tank body through their respective suction pumps and their respective external pipes The upper side of the heat storage tank body is connected to the tank, and the immersed coil heat exchanger is installed in the center of the heat storage tank body after passing through the circular partition hole. The agitator and the phase change heat exchanger components are coaxially installed below the immersed coil heat exchanger in sequence. The upper end face and the lower end face of the heat storage tank body are respectively provided with a heat transfer medium injection port and a heat transfer medium discharge port. The heat storage tank body is filled with molten salt. After the molten salt enters the respective suction heaters for heating under the action of the respective suction pumps, it is transported to the top of the heat storage tank by the respective pump bodies to form a high-temperature molten salt zone, and the unheated part at the bottom is the low-temperature molten salt zone. The high-temperature molten salt zone and the low-temperature molten salt zone are separated by a partition; the heat transfer medium injection port is connected to the inlet pipe of the immersed coil heat exchanger, and the outlet of the immersed coil heat exchanger is connected to the inlet of the phase change heat exchanger.
所述相变换热器部件，主要由传热层、相变蓄热材料、相变换热器管道、上侧均流板、下侧均流板和加热棒组成；相变换热器管道和加热棒组成了相变换热器部件的筒体，相变换热器管道的布置方式为多个中心圆均布排布，沿筒体轴线垂直对称分布有四根加热棒，四根加热棒的下端分别固定在蓄热罐体的下侧，相变蓄热材料填充在相变换热器管道的外部，筒体外部焊接有传热层，相变换热器管道上下端分别布置有上侧均流板和下侧均流板，上侧均流板与相变换热器入口连通，下侧均流板与传热介质排出口连通。The phase change heat exchanger component is mainly composed of a heat transfer layer, a phase change heat storage material, a phase change heat exchanger pipeline, an upper flow equalizing plate, a lower flow equalizing plate and a heating rod; the phase change heat exchanger pipeline and the heating rod constitute the cylinder of the phase change heat exchanger component, the phase change heat exchanger pipeline is arranged in a manner that multiple center circles are evenly distributed, four heating rods are vertically symmetrically distributed along the axis of the cylinder, the lower ends of the four heating rods are respectively fixed on the lower side of the heat storage tank body, the phase change heat storage material is filled on the outside of the phase change heat exchanger pipeline, a heat transfer layer is welded on the outside of the cylinder, the upper flow equalizing plate and the lower flow equalizing plate are respectively arranged at the upper and lower ends of the phase change heat exchanger pipeline, the upper flow equalizing plate is connected to the phase change heat exchanger inlet, and the lower flow equalizing plate is connected to the heat transfer medium discharge outlet.
所述相变换热器部件中的换热器管道，为内外双螺旋翅片管结构，相变换热器管道选用铝管。The heat exchanger pipe in the phase change heat exchanger component is an inner and outer double helical fin tube structure, and the phase change heat exchanger pipe is made of aluminum tube.
所述圆形隔板和蓄热罐体的内壁面间隙为3～5mm。The gap between the circular partition and the inner wall of the heat storage tank body is 3 to 5 mm.
所述抽吸式电加热器与接管为法兰连接。The suction type electric heater is connected to the connecting pipe via a flange.
本发明具有的有益效果：The present invention has the beneficial effects:
1)单位体积的蓄热量和放热量大。本发明的蓄热过程中，利用谷电的电量启动整个装置的电加热棒，单罐蓄热器内抽吸式电加热棒的热量一部分用于加热蓄热储罐内部的熔融盐，进行显热蓄热；另一部分则由高温熔融盐接触相变换热器外部的传热层将热量传到内部的相变蓄热材料中，同时相变蓄热器内部的加热棒工作，将相变蓄热材料由固态转变为液态用于储存热量，即进行了相变蓄热。本次采用了混合式蓄热方式，将相变蓄热和显热蓄热有效结合。对比传统单罐蓄热器，本发明的热量利用率和放热量都有明显提升。除此之外，蓄热罐体内部增设了可移动的隔板装置，避免了冷热流体大面积接触造成的热量损失，提高了单位体积熔融盐的蓄热量。1) The heat storage and heat release per unit volume are large. During the heat storage process of the present invention, the amount of valley electricity is used to start the electric heating rod of the entire device. Part of the heat of the suction electric heating rod in the single-tank heat accumulator is used to heat the molten salt inside the heat storage tank for sensible heat storage; the other part is transferred to the internal phase change heat storage material by the high-temperature molten salt contacting the heat transfer layer outside the phase change heat accumulator. At the same time, the heating rod inside the phase change heat accumulator works to change the phase change heat storage material from solid to liquid for heat storage, that is, phase change heat storage is performed. This time, a hybrid heat storage method is adopted to effectively combine phase change heat storage and sensible heat storage. Compared with the traditional single-tank heat accumulator, the heat utilization rate and heat release of the present invention are significantly improved. In addition, a movable partition device is added inside the heat storage tank body to avoid heat loss caused by large-area contact between cold and hot fluids, thereby increasing the heat storage per unit volume of molten salt.
2)优化了相变换热器流动效果和传热性能。相变换热器中管道采用双螺旋翅片管道，在相同条件下与光管相比，相变材料熔化和凝固时间明显缩短，从而减少了蓄热和放热时间。同时，对于内环肋管，选用内肋间距与内肋高之比等于8，此时管内的流动状况和传热效果最佳。2) Optimized the flow effect and heat transfer performance of the phase change heat exchanger. The pipes in the phase change heat exchanger use double helical fin pipes. Compared with the plain pipes under the same conditions, the melting and solidification time of the phase change material is significantly shortened, thereby reducing the heat storage and heat release time. At the same time, for the inner ring fin pipe, the ratio of the inner rib spacing to the inner rib height is selected to be equal to 8, at which time the flow condition and heat transfer effect in the pipe are the best.
3)结构紧凑、制造成本低。本发明中对比双罐熔融盐蓄热系统和传统单罐系统，减少了蓄热罐体材料的使用量以及简化了管路的复杂性，降低了制造费用。3) Compact structure and low manufacturing cost. Compared with the double-tank molten salt thermal storage system and the traditional single-tank system, the present invention reduces the amount of thermal storage tank material used and simplifies the complexity of the pipeline, thereby reducing the manufacturing cost.
4)工作温度范围广。可以根据实际需求选择单罐蓄热器内熔融盐的高低温熔点，同时引入了相变蓄热器，使得蓄热罐使用温度更加均匀，进出口温度可以保持稳定温差。4) Wide operating temperature range. The high and low melting points of the molten salt in the single-tank heat storage tank can be selected according to actual needs. At the same time, the phase change heat storage tank is introduced to make the use temperature of the heat storage tank more uniform, and the inlet and outlet temperatures can maintain a stable temperature difference.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1是本发明的一种混合式蓄热与放热一体罐的结构剖面图。FIG1 is a structural cross-sectional view of a hybrid heat storage and heat release integrated tank of the present invention.
图2是图1的A-A视图；Fig. 2 is an A-A view of Fig. 1;
图3是本发明的相变蓄热器的结构俯视图。FIG. 3 is a top view of the structure of the phase change heat storage device of the present invention.
图4是本发明的相变蓄热器管道的结构示意图。FIG. 4 is a schematic diagram of the structure of the phase change heat accumulator pipeline of the present invention.
图中：1、传热介质注入口，2、带保温层的蓄热罐体，3、熔融盐，4、圆形隔板，5、导轨，6、直线轴承，7、搅拌器，8、抽吸泵，9、接管，10、抽吸式电加热器，11、外部管道，12、环形凸台，13、浸没式蛇管换热器，14、相变换热器入口，15、传热层，16、上侧均流板，17、相变蓄热材料，18、相变换热器管道，19、加热棒，20、下侧均流板，21、传热介质排出口。In the figure: 1. heat transfer medium injection port, 2. heat storage tank with insulation layer, 3. molten salt, 4. circular partition, 5. guide rail, 6. linear bearing, 7. agitator, 8. suction pump, 9. connecting pipe, 10. suction electric heater, 11. external pipeline, 12. annular boss, 13. immersed coil heat exchanger, 14. phase change heat exchanger inlet, 15. heat transfer layer, 16. upper side equalizing plate, 17. phase change heat storage material, 18. phase change heat exchanger pipeline, 19. heating rod, 20. lower side equalizing plate, 21. heat transfer medium discharge port.
具体实施方式Detailed ways
下面结合附图和实施例对本发明作进一步说明。The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
如图1、图2所示，本发明包括蓄热储罐部件、浸没式蛇管换热器13和相变换热器部件；蓄热储罐部件：主要由带保温层的蓄热罐体2、圆形隔板4、多根导轨5、与多根导轨相同个数的直线轴承6、搅拌器7、两台抽吸泵8、两根接管9、两个抽吸式电加热器10、两根外部管道11和上下环形凸台12组成；同一圆周上均布有多根导轨5固定在蓄热罐体2上下侧面间，蓄热罐体2内壁设有上下环形凸台12，圆形隔板4分别通过直线轴承6能沿各自导轨在上下环形凸台12间滑动；两个对称布置的抽吸式电加热器10经各自接管9从蓄热罐体2的下侧面接入罐内，两个抽吸式电加热器10分别通过各自抽吸泵8和各自外部管道11从蓄热罐体2上侧面接入罐内，浸没式蛇管换热器13穿过圆形隔板4孔后装在蓄热罐体2中心，浸没式蛇管换热器13下面依次同轴装有搅拌器7和相变换热器部件，蓄热罐体2的上端面与下端面分别设有传热介质注入口1和传热介质排出口21，蓄热罐体2内充满熔融盐3，熔融盐3在各自抽吸泵8作用下进入各自抽吸式加热器10进行加热之后，由各自泵体输送到蓄热储罐的上方，形成高温熔融盐区，底部未加热部分则为低温熔融盐区，高温熔融盐区和低温熔融盐区用隔板4进行分隔；传热介质注入口1与浸没式蛇管换热器13入口管道连接，浸没式蛇管换热器13出口与相变换热器入口14连接。As shown in Figures 1 and 2, the present invention includes a heat storage tank component, an immersed coil heat exchanger 13 and a phase change heat exchanger component; the heat storage tank component: mainly composed of a heat storage tank body 2 with a thermal insulation layer, a circular partition 4, a plurality of guide rails 5, a linear bearing 6 of the same number as the plurality of guide rails, an agitator 7, two suction pumps 8, two pipes 9, two suction electric heaters 10, two external pipes 11 and upper and lower annular bosses 12; a plurality of guide rails 5 are evenly distributed on the same circumference and fixed between the upper and lower side surfaces of the heat storage tank body 2, and the inner wall of the heat storage tank body 2 is provided with upper and lower annular bosses 12, and the circular partition 4 can slide between the upper and lower annular bosses 12 along their respective guide rails through the linear bearings 6; two symmetrically arranged suction electric heaters 10 are connected to the tank from the lower side surface of the heat storage tank body 2 through their respective pipes 9, and the two suction electric heaters 10 are respectively connected to the tank through their respective suction pumps 8 and The external pipe 11 is connected to the tank from the upper side of the heat storage tank body 2, and the immersed coil heat exchanger 13 is installed in the center of the heat storage tank body 2 after passing through the holes of the circular partition 4. The stirrer 7 and the phase change heat exchanger components are coaxially installed below the immersed coil heat exchanger 13 in sequence. The upper end face and the lower end face of the heat storage tank body 2 are respectively provided with a heat transfer medium injection port 1 and a heat transfer medium discharge port 21. The heat storage tank body 2 is filled with molten salt 3. After the molten salt 3 enters the respective suction heaters 10 for heating under the action of the respective suction pumps 8, it is transported to the top of the heat storage tank by the respective pump bodies to form a high-temperature molten salt zone, and the unheated part at the bottom is a low-temperature molten salt zone. The high-temperature molten salt zone and the low-temperature molten salt zone are separated by a partition 4; the heat transfer medium injection port 1 is connected to the inlet pipe of the immersed coil heat exchanger 13, and the outlet of the immersed coil heat exchanger 13 is connected to the inlet 14 of the phase change heat exchanger.
如图2、图3、图4所示，所述相变换热器部件，主要由传热层15、相变蓄热材料17、相变换热器管道18、上侧均流板16、下侧均流板20和加热棒19组成；相变换热器管道18和加热棒19组成了相变换热器部件的筒体，相变换热器管道18的布置方式为多个中心圆均布排布，沿筒体轴线垂直对称分布有四根加热棒19，四根加热棒19的下端分别固定在蓄热罐体2的下侧，相变蓄热材料17填充在相变换热器管道18的外部，筒体外部焊接有传热层15，相变换热器管道上下端分别布置有上侧均流板16和下侧均流板20，上侧均流板16与相变换热器入口14连通，下侧均流板20与传热介质排出口21连通。As shown in Figures 2, 3 and 4, the phase change heat exchanger component is mainly composed of a heat transfer layer 15, a phase change heat storage material 17, a phase change heat exchanger pipeline 18, an upper flow equalizing plate 16, a lower flow equalizing plate 20 and a heating rod 19; the phase change heat exchanger pipeline 18 and the heating rod 19 constitute the cylinder of the phase change heat exchanger component, and the phase change heat exchanger pipeline 18 is arranged in a manner that multiple center circles are evenly distributed, and four heating rods 19 are vertically symmetrically distributed along the axis of the cylinder, and the lower ends of the four heating rods 19 are respectively fixed on the lower side of the heat storage tank body 2, and the phase change heat storage material 17 is filled on the outside of the phase change heat exchanger pipeline 18. The heat transfer layer 15 is welded on the outside of the cylinder, and the upper and lower ends of the phase change heat exchanger pipeline are respectively arranged with an upper flow equalizing plate 16 and a lower flow equalizing plate 20, the upper flow equalizing plate 16 is connected to the phase change heat exchanger inlet 14, and the lower flow equalizing plate 20 is connected to the heat transfer medium discharge outlet 21.
如图4所示，所述相变换热器部件中的换热器管道18，为内外双螺旋翅片管结构，相变换热器管道选用铝管，内肋间距与内肋高之比等于8。As shown in FIG. 4 , the heat exchanger pipe 18 in the phase change heat exchanger component is an inner and outer double helical finned tube structure. The phase change heat exchanger pipe is made of aluminum tube, and the ratio of the inner rib spacing to the inner rib height is equal to 8.
如图1所示，所述圆形隔板4和蓄热罐体2的内壁面间隙为3～5mm。As shown in FIG. 1 , the gap between the circular partition plate 4 and the inner wall surface of the heat storage tank body 2 is 3 to 5 mm.
如图1所示，所述抽吸式电加热器10与接管9为法兰连接。As shown in FIG. 1 , the suction electric heater 10 is connected to the connecting pipe 9 by a flange.
本发明的工作原理如下：The working principle of the present invention is as follows:
本发明存在蓄热过程和放热过程两种工况：The present invention has two working conditions: heat storage process and heat release process:
蓄热过程：包括显热蓄热过程和相变蓄热过程。在显热蓄热过程中，电源控制总成启动两台抽吸式电加热器10和搅拌器7。两台抽吸式电加热器10对蓄热罐体2底部的熔融盐3进行加热形成高温熔融盐，在两台抽吸泵8的作用下，沿着各自外部管道11输送到蓄热罐体2的顶部，温度高的熔融盐密度小，所以高温熔融盐会随着蓄热反应进行不断堆积在罐体上侧。隔板4上焊有直线轴承6，隔板4可以沿着六根导轨5进行滑动，当高温熔融盐堆积到一定量后会推动隔板4向下运动，同时，蓄热罐体2下侧的低温熔融盐不断被两台抽吸式加热器10加热变成高温熔融盐输送到蓄热罐体2上侧，隔板4的设置使得冷热熔融盐直接接触面积大大减少。当隔板4被移动到下侧环形凸台12时，加热器停止工作，完成显热蓄热过程。在相变蓄热过程中，两台抽吸式加热器10对底部熔融盐加热，一部分热量会由加热后的熔融盐接触传热层15传递给相变式换热器内的相变蓄热材料17，相变蓄热材料17经过相变蓄热器的加热棒19和传热层15携带的热量，由固态转变成液态，完成相变蓄热过程。Heat storage process: including sensible heat storage process and phase change heat storage process. In the sensible heat storage process, the power control assembly starts two suction electric heaters 10 and agitator 7. The two suction electric heaters 10 heat the molten salt 3 at the bottom of the heat storage tank 2 to form high-temperature molten salt. Under the action of two suction pumps 8, the molten salt is transported to the top of the heat storage tank 2 along their respective external pipes 11. The molten salt with high temperature has low density, so the high-temperature molten salt will continue to accumulate on the upper side of the tank as the heat storage reaction proceeds. Linear bearings 6 are welded on the partition 4, and the partition 4 can slide along the six guide rails 5. When the high-temperature molten salt accumulates to a certain amount, it will push the partition 4 to move downward. At the same time, the low-temperature molten salt on the lower side of the heat storage tank 2 is continuously heated by the two suction heaters 10 to become high-temperature molten salt and transported to the upper side of the heat storage tank 2. The setting of the partition 4 greatly reduces the direct contact area between the cold and hot molten salts. When the partition 4 is moved to the lower annular boss 12, the heater stops working and the sensible heat storage process is completed. During the phase change heat storage process, two suction heaters 10 heat the bottom molten salt, and part of the heat will be transferred from the heated molten salt to the phase change heat storage material 17 in the phase change heat exchanger through the heat carried by the heating rod 19 and the heat transfer layer 15 of the phase change heat accumulator, and the phase change heat storage material 17 will be transformed from solid to liquid, completing the phase change heat storage process.
放热过程：换热介质由传热介质注入口1进入浸没式蛇管换热器13，与隔板4上侧的高温熔融盐接触换热，熔融盐经过换热器后温度下降，温度低的熔融盐密度大，通过浸没式换热器中间环形通道流向蓄热罐体的下侧，下侧熔融盐堆积推动隔板4向上运动，罐体上侧高温熔融盐受到隔板4的挤压，不断进入浸没式蛇管换热器13中间环形区域进行换热。从浸没式蛇管换热器13出口流出的换热介质再通过传热层顶部入口14进入上侧均流板16，均匀流入管壳式相变换热器管道18进行换热，相变换热器管道18外的相变蓄热材料17由液态变为固态放出热量，传热介质吸收热量后从底部传热介质排出口21流出，完成放热过程。Heat release process: The heat exchange medium enters the submerged coil heat exchanger 13 from the heat transfer medium injection port 1, and exchanges heat with the high-temperature molten salt on the upper side of the partition 4. The temperature of the molten salt drops after passing through the heat exchanger. The low-temperature molten salt has a large density and flows to the lower side of the heat storage tank through the middle annular channel of the submerged heat exchanger. The accumulation of molten salt on the lower side pushes the partition 4 to move upward. The high-temperature molten salt on the upper side of the tank body is squeezed by the partition 4 and continuously enters the middle annular area of the submerged coil heat exchanger 13 for heat exchange. The heat exchange medium flowing out of the outlet of the submerged coil heat exchanger 13 enters the upper flow equalizing plate 16 through the top inlet 14 of the heat transfer layer, and flows evenly into the shell and tube phase change heat exchanger pipe 18 for heat exchange. The phase change heat storage material 17 outside the phase change heat exchanger pipe 18 changes from liquid to solid to release heat. After the heat transfer medium absorbs the heat, it flows out from the bottom heat transfer medium outlet 21, completing the heat release process.
在实际使用过程中，可以利用谷电期间的电量对加热棒19进行加热，将热量储存在蓄热单罐的熔融盐和相变换热器的相变蓄热材料中，之后白天进行放热过程，以达到削峰填谷的作用，提高电网的稳定性。对比双罐蓄热系统和传统单罐蓄热系统，本发明采用混合式蓄热方法，大幅度提高了该装置的蓄热量以及在蓄热过程中热量的利用率，同时简化了装置，降低了整体装置的制造和运行成本。In actual use, the electricity during valley power can be used to heat the heating rod 19, and the heat can be stored in the molten salt of the single heat storage tank and the phase change heat storage material of the phase change heat exchanger. Then, the heat release process is carried out during the day to achieve the effect of peak shaving and valley filling, thereby improving the stability of the power grid. Compared with the double-tank heat storage system and the traditional single-tank heat storage system, the present invention adopts a hybrid heat storage method, which greatly improves the heat storage capacity of the device and the utilization rate of heat during the heat storage process, while simplifying the device and reducing the manufacturing and operating costs of the overall device.
上述具体实施方式用来解释说明本发明，而不是对本发明进行限制，在本发明的精神和权利要求的保护范围内，对本发明作出的任何修改和改变，都落入本发明的保护范围。The above specific implementation modes are used to explain the present invention rather than to limit the present invention. Any modification and change made to the present invention within the spirit of the present invention and the protection scope of the claims shall fall within the protection scope of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911200484.3ACN110763065B (en) | 2019-11-29 | 2019-11-29 | Hybrid heat storage and heat release tank |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911200484.3ACN110763065B (en) | 2019-11-29 | 2019-11-29 | Hybrid heat storage and heat release tank |
| Publication Number | Publication Date |
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| CN110763065A CN110763065A (en) | 2020-02-07 |
| CN110763065Btrue CN110763065B (en) | 2024-04-19 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911200484.3AActiveCN110763065B (en) | 2019-11-29 | 2019-11-29 | Hybrid heat storage and heat release tank |
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| CN (1) | CN110763065B (en) |
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