A cold-heat combined storage heat storage system and a method for operating the same

Abstract

The present application relates to a kind of cold and hot storage heat storage system and its operating method, the system includes hot water main pipe, cold water main pipe and several heat storage units connected in parallel between the two;Each heat storage unit includes heat storage pool, and two inlets and outlets are provided on the heat storage pool, and two inlets and outlets are connected to hot water main pipe and cold water main pipe by hot water valve and cold water valve respectively, heat storage pool releases stored hot water and makes cold water storage during heating period, and releases stored cold water and makes hot water storage during cooling period, to realize the function of heating supply and cold storage during heating period, and cooling supply and heat storage during cooling period;The operating method of the system is to switch through valve, guide hot water or cold water to flow into empty heat storage pool, while releasing cold water or hot water from one heat storage pool until emptying, avoid cold water into heat storage pool stored hot water or hot water into heat storage pool stored cold water, cause cold and hot neutralization, loss storage capacity and heat storage capacity, improve the heat storage efficiency of system, and reduce heat storage cost.

Description

TECHNICAL FIELD

[0001] The present application relates to a heat storage system, in particular to a cold-heat storage heat storage system capable of long-term energy storage and a running method thereof, and belongs to the technical field of energy power. BACKGROUND

[0002] In recent years, the recycling of zero-carbon waste heat resources such as power plant waste heat, industrial waste heat, data center waste heat, urban reclaimed water and waste incineration waste heat is an important technical path to reduce heating carbon emissions and achieve heating carbon neutrality. However, these valuable zero-carbon waste heat resources are emitted throughout the year. In order to collect and utilize the waste heat emitted in the non-heating season, cross-seasonal thermal storage technology is needed to store the waste heat recovered in the non-heating season for use in the heating season.

[0003] However, the existing cross-seasonal thermal storage technology has a small thermal storage temperature difference, a low thermal storage density, and a high cost per unit of thermal storage, so that cross-seasonal thermal storage cannot meet the economic requirements. Therefore, the lower limit of the water storage temperature of the cross-seasonal thermal storage system can be reduced to greatly improve the thermal storage temperature difference and the thermal storage density. Further, the water storage can be made into ice slurry, and the latent heat of the water storage can be used for heating, so that the thermal storage density can be increased by more than 3-4 times, thereby greatly reducing the thermal storage cost. In addition, the stored cold water and ice slurry can also be used for centralized cooling in summer to reduce air conditioning load and reduce the peak power demand of the power system.

[0004] However, in such a cross-seasonal cold-heat storage heat storage system, it is necessary to realize the conversion of high-temperature water storage and low-temperature water storage and ice slurry ice storage, to avoid cold-heat mixing as much as possible, to reduce the loss of cold storage and heat storage, to improve the heat storage efficiency of the long-term cold-heat storage heat storage system, and to reduce the heat storage cost. SUMMARY

[0005] To solve the above problems, one object of the present application is to provide a cold-heat storage heat storage system capable of long-term energy storage, and another object of the present application is to provide a running method of the cold-heat storage heat storage system.

[0006] To achieve the above objects, the present application adopts the following technical solutions:

[0007] In a first aspect, the present application provides a first cold-heat storage heat storage system, which comprises a hot medium main pipe, a cold medium main pipe, and a plurality of heat storage units connected in parallel between the hot medium main pipe and the cold medium main pipe; each heat storage unit comprises a heat storage container, the heat storage container is provided with a first inlet and outlet and a second inlet and outlet, the first inlet and outlet are connected to the hot medium main pipe through a hot medium valve, and the second inlet and outlet are connected to the cold medium main pipe through a cold medium valve.

[0008] The cold-heat combined storage heat accumulation system preferably further comprises an ice slurry mother pipe, and the first inlet and outlet of the heat accumulation container are connected to the ice slurry mother pipe and the heat medium mother pipe through an ice slurry valve and a heat medium valve respectively.

[0009] The cold-heat combined storage heat accumulation system preferably further comprises an ice slurry mother pipe, and the heat accumulation container is further provided with a third inlet and outlet connected to the ice slurry mother pipe through an ice slurry valve.

[0010] In the second aspect, the present application provides a second cold-heat combined storage heat accumulation system, which comprises a heat medium mother pipe, a cold medium mother pipe, an ice slurry mother pipe and a plurality of heat accumulation units connected in parallel between the heat medium mother pipe, the cold medium mother pipe and the ice slurry mother pipe; each heat accumulation unit comprises a heat accumulation container provided with a first inlet and outlet, a second inlet and outlet and a third inlet and outlet, the first inlet and outlet are connected to the ice slurry mother pipe through an ice slurry valve, the second inlet and outlet are connected to the cold medium mother pipe through a cold medium valve, and the third inlet and outlet are connected to the heat medium mother pipe through a heat medium valve.

[0011] The cold-heat combined storage heat accumulation system preferably uses high-temperature water with a temperature of about 80-90℃ as the heat medium and low-temperature water with a temperature of about 5-10℃ as the cold medium.

[0012] In the third aspect, the present application provides an operation method based on the first cold-heat combined storage heat accumulation system, in which the system operates in a heat storage and cold storage mode in the heating period, i.e. each heat accumulation container storing high-temperature medium is first emptied and then filled with low-temperature medium; and the system operates in a cold storage and heat storage mode in the cooling period, i.e. each heat accumulation container storing low-temperature medium is first emptied and then filled with high-temperature medium.

[0013] The operation method preferably comprises the following steps of: setting the heat accumulation container (i-1) of the i th heat accumulation unit as empty, storing high-temperature medium in the heat accumulation containers of a plurality of heat accumulation units, storing low-temperature medium in the heat accumulation containers of the remaining heat accumulation units, opening the cold medium valve (i-V3) and closing the heat medium valve (i-V2) of the i th heat accumulation unit, and allowing the low-temperature medium in the cold medium mother pipe to enter the heat accumulation container (i-1) through the cold medium valve (i-V3); opening the heat medium valve (j-V2) and closing the cold medium valve (j-V3) of the j th heat accumulation unit storing high-temperature medium, allowing the high-temperature medium stored in the heat accumulation container (j-1) to flow out from the first inlet and outlet (j-2) thereof, enter the heat medium mother pipe through the heat medium valve (j-V2), and adjust the heat supply of the system by adjusting the medium flow rate entering the heat accumulation container (i-1) and flowing out of the heat accumulation container (j-1) until the heat accumulation container (j-1) is emptied.

[0014] The operation process of the cold supply and heat storage mode is as follows: the heat storage container (i-1) of the i th heat storage unit is set to be empty, the heat storage containers of the plurality of heat storage units are stored with high-temperature medium, the heat storage containers of the remaining heat storage units are stored with low-temperature medium, the cold medium valve (i-V3) of the i th heat storage unit is closed and the heat medium valve (i-V2) is opened, the high-temperature medium in the heat medium mother pipe enters the heat storage container (i-1) through the heat medium valve (i-V2); the heat medium valve (j-V2) of the j th heat storage unit storing the low-temperature medium is closed and the cold medium valve (j-V3) is opened, the low-temperature medium stored in the heat storage container (j-1) flows out from the second inlet and outlet (j-3) thereof, enters the cold medium mother pipe through the cold medium valve (j-V3), the medium flow entering the heat storage container (i-1) and flowing out of the heat storage container (j-1) is adjusted to adjust the cold supply capacity of the system, and the heat storage container (j-1) is emptied until the heat storage container (j-1) is emptied.

[0015] In a fourth aspect, the application provides an operation method of the second cold-heat combined storage heat storage system, in the heating period, the cold-heat combined storage heat storage system operates in the heat supply and ice storage mode, that is, each heat storage container storing high-temperature medium is first replaced with low-temperature medium, and then ice slurry is fed into the heat storage container storing low-temperature medium; in the cooling period, the cold-heat combined storage heat storage system operates in the cold supply and heat storage mode, that is, each heat storage container storing ice slurry is first replaced with low-temperature medium, and then high-temperature medium is stored therein.

[0016] The operation method, preferably when based on the first cold-heat combined storage heat storage system comprising an ice slurry mother pipe, the operation process of the heat supply and ice storage mode is as follows: in the starting stage, the heat storage containers of all heat storage units are stored with high-temperature medium, the ice slurry valve (i-V1) of the i th heat storage unit is closed, the heat medium valve (i-V2) and the cold medium valve (i-V3) are opened, the low-temperature medium in the cold medium mother pipe enters the heat storage container (i-1) through the cold medium valve (i-V3), the high-temperature medium originally stored in the heat storage container (i-1) is fed out from the first inlet and outlet (i-2) thereof and then fed into the heat medium mother pipe through the heat medium valve (i-V2), and the heat supply capacity of the system is adjusted by adjusting the medium flow entering the heat storage container (i-1), which is continuously maintained until the heat storage container (i-1) discharges all the high-temperature medium stored therein and is filled with low-temperature medium, and then enters the intermediate stage.

[0017] In the middle stage, the storage containers of some of the thermal storage units are filled with low-temperature medium, the storage containers of the rest of the thermal storage units are still filled with high-temperature medium, the ice slurry valve (j-V1) and the cold medium valve (j-V3) of the jth thermal storage unit filled with low-temperature medium are opened, the hot medium valve (j-V2) is closed, the ice slurry flows from the ice slurry main pipe into the storage container (j-1) through the ice slurry valve (j-V1), the low-temperature medium stored in the storage container (j-1) is sent out through the second inlet and outlet (j-3) thereof and then sent into the cold medium main pipe through the cold medium valve (j-V3), the hot medium valve (k-V2) and the cold medium valve (k-V3) of the kth thermal storage unit filled with high-temperature medium are opened, the ice slurry valve (k-V1) is closed, the low-temperature medium in the cold medium main pipe flows into the storage container (k-1) through the cold medium valve (k-V3), the high-temperature medium originally stored in the storage container (k-1) is sent out through the first inlet and outlet (k-2) thereof and then sent into the hot medium main pipe through the hot medium valve (k-V3), the heating capacity and the ice storage capacity of the system are adjusted by adjusting the flow rates of the medium and the ice slurry into the storage containers, and this stage continues until there is no high-temperature medium in the storage containers of all the thermal storage units, and then the final stage is entered;

[0018] In the final stage, the storage containers of some of the thermal storage units are filled with ice slurry, the storage containers of the rest of the thermal storage units are filled with low-temperature medium, the ice slurry valve (l-V1) and the cold medium valve (l-V3) of the lth thermal storage unit filled with low-temperature medium are opened, the hot medium valve (l-V2) is closed, the ice slurry flows from the ice slurry main pipe into the storage container (l-1) through the ice slurry valve (l-V1), the low-temperature medium stored in the storage container (l-1) is sent out through the second inlet and outlet (l-3) thereof and then sent into the cold medium main pipe through the cold medium valve (l-V3), the heating capacity and the ice storage capacity of the system are adjusted by adjusting the flow rates of the ice slurry into the storage containers, and this stage continues until the storage containers of all the thermal storage units are filled with ice slurry.

[0019] The operation process of the cooling and heat storage mode is as follows: in the starting stage, the storage containers of all the thermal storage units are filled with ice slurry, the ice slurry valve (a-V1) and the cold medium valve (a-V3) of the ath thermal storage unit are opened, the hot medium valve (a-V2) is closed, the low-temperature medium in the cold medium main pipe flows into the storage container (a-1) through the cold medium valve (a-V3), and the ice slurry stored at the top is sent out through the first inlet and outlet (a-2) thereof and then sent into the ice slurry main pipe through the ice slurry valve (a-V1), the cooling capacity of the system is adjusted by adjusting the flow rate of the medium into the storage container, and this stage continues until the medium flowing out of the first inlet and outlet (a-2) of the storage container (a-1) no longer contains ice slurry, and then the middle stage is entered.

[0020] In the intermediate stage, the phase change material storage containers of some of the phase change units are filled with low temperature medium, the phase change material storage containers of the rest of the phase change units are still filled with ice slurry, the ice slurry valve (b-V1) of the bth phase change unit filled with low temperature medium is closed, the hot medium valve (b-V2) and the cold medium valve (b-V3) are opened, the high temperature medium flows into the phase change material storage container (b-1) from the hot medium main pipe through the hot medium valve (b-V2), the low temperature medium flows out of the phase change material storage container (b-1) from the second inlet and outlet (b-3) and flows into the cold medium main pipe through the cold medium valve (b-V3); the ice slurry valve (c-V1) and the cold medium valve (c-V3) of the cth phase change unit filled with ice slurry are opened, the hot medium valve (c-V2) is closed, the low temperature medium in the cold medium main pipe flows into the phase change material storage container (c-1) through the cold medium valve (c-V3), the ice slurry stored in the top part of the phase change material storage container (c-1) flows out of the first inlet and outlet (c-2) and flows into the ice slurry main pipe through the ice slurry valve (c-V1), the cooling capacity and the heat storage capacity of the system are adjusted by adjusting the flow of the medium into the phase change material storage containers, the stage is kept until the phase change material storage containers of all the phase change units are empty, and then the final stage is entered.

[0021] In the final stage, the phase change material storage containers of some of the phase change units are filled with high temperature medium, the phase change material storage containers of the rest of the phase change units are filled with low temperature medium, the ice slurry valve (d-V1) of the dth phase change unit filled with low temperature medium is closed, the hot medium valve (d-V2) and the cold medium valve (d-V3) are opened, the high temperature medium flows into the phase change material storage container (d-1) from the hot medium main pipe through the hot medium valve (d-V2), the low temperature medium flows out of the second inlet and outlet (d-3) of the phase change material storage container (d-1) and flows into the cold medium main pipe through the cold medium valve (d-V3), the cooling capacity and the heat storage capacity of the system are adjusted by adjusting the flow of the medium into the phase change material storage containers, the stage is kept until the phase change material storage containers of all the phase change units are filled with high temperature medium.

[0022] In the operation method, preferably, when the second cold-heat storage phase change system is used, the operation process of the ice storage heating mode is as follows: in the initial stage, the phase change material storage container (i-1) of the ith phase change unit is set to be empty, the phase change material storage containers of the rest of the phase change units are filled with high temperature medium, the cold medium valve (i-V3) of the ith phase change unit is opened, the ice slurry valve (i-v1) and the hot medium valve (i-V2) are closed, the low temperature medium in the cold medium main pipe flows into the phase change material storage container (i-1) through the cold medium valve (i-V3); the hot medium valve (j-V2) of the jth phase change unit filled with high temperature medium is opened, the ice slurry valve (j-V1) and the cold medium valve (j-V3) are closed, the high temperature medium stored in the phase change material storage container (j-1) flows out of the third inlet and outlet (j-4) and flows into the hot medium main pipe through the hot medium valve (j-V2), the heating capacity of the system is adjusted by adjusting the flow of the medium into the phase change material storage container (i-1) and out of the phase change material storage container (j-1), and then the intermediate stage is entered after the phase change material storage container (j-1) is emptied.

[0023] In the middle stage, the storage containers of some of the thermal storage units are filled with low-temperature medium, the storage containers of some of the thermal storage units are filled with ice slurry, the storage container of the a-th thermal storage unit (a-1) is set to be empty, the storage containers of the rest of the thermal storage units are filled with high-temperature medium, the cold medium valve (a-V3) of the a-th thermal storage unit is opened, the ice slurry valve (a-v1) and the hot medium valve (a-V2) are closed, the low-temperature medium in the cold medium mother pipe enters the storage container (a-1) through the cold medium valve (a-V3); the ice slurry valve (b-V1) and the cold medium valve (b-V3) of the b-th thermal storage unit filled with low-temperature medium are opened, the hot medium valve (b-V2) is closed, the ice slurry enters the storage container (b-1) from the ice slurry mother pipe through the ice slurry valve (b-V1), the low-temperature medium at the bottom of the storage container (b-1) is sent out through the second inlet and outlet (b-3) thereof and is sent into the cold medium mother pipe after passing through the cold medium valve (b-V3); the hot medium valve (c-V2) of the c-th thermal storage unit filled with high-temperature medium is opened, the ice slurry valve (c-V1) and the cold medium valve (c-V3) are closed, the high-temperature medium stored in the storage container (c-1) flows out from the third inlet and outlet (c-4) thereof and enters the hot medium mother pipe after passing through the hot medium valve (c-V2), the heat supply and the ice storage are adjusted by adjusting the flow rates of the ice slurry entering the storage container (b-1), the medium entering the storage container (a-1) and flowing out of the storage container (c-1), and after the high-temperature medium stored in all the storage containers except the empty one is released, the system enters the end stage;

[0024] In the end stage, the storage containers of some of the thermal storage units are filled with ice slurry, the storage container of the k-th thermal storage unit (k-1) is set to be empty, the storage containers of the rest of the thermal storage units are filled with low-temperature medium, the ice slurry valve (l-V1) and the cold medium valve (l-V3) of the l-th thermal storage unit filled with low-temperature medium are opened, the hot medium valve (l-V2) is closed, the ice slurry enters the storage container (l-1) from the ice slurry mother pipe through the ice slurry valve (l-V1), the low-temperature medium stored at the bottom of the storage container (l-1) is sent out through the second inlet and outlet (l-3) thereof and is sent into the cold medium mother pipe after passing through the cold medium valve (l-V3), the heat supply and the ice storage of the system are adjusted by adjusting the flow rates of the ice slurry entering the storage containers, and after all the storage containers of the rest of the thermal storage units except the empty one are filled with ice slurry, the system enters the end stage;

[0025] The operation process of the cold supply and heat storage mode is as follows: in the initial stage, the storage container of one of the storage units is empty, and the storage containers of the rest of the storage units are full of ice slurry, the ice slurry valve (w-V1) and the cold medium valve (w-V3) of the ice slurry storage unit full of ice slurry are opened, the hot medium valve (w-V2) is closed, the low-temperature medium in the cold medium mother pipe flows into the storage container (w-1) through the cold medium valve (w-V3), and the ice slurry stored at the top is sent out through the first inlet and outlet (w-2) thereof, and then into the ice slurry mother pipe through the ice slurry valve (w-V1), and the cooling capacity of the system is adjusted by adjusting the flow of the medium into the storage container, and this stage continues until the medium flowing out of the first inlet and outlet (w-2) of the storage container (w-1) no longer contains ice slurry, and then enters the intermediate stage;

[0026] In the intermediate stage, the storage containers of a plurality of storage units are full of cold medium, and the storage containers of a plurality of storage units are full of ice slurry, the storage container (x-1) of the xth storage unit is set to be empty, the storage containers of the rest of the storage units store high-temperature medium, the hot medium valve (x-V2) of the xth storage unit is opened, and the ice slurry valve (x-V1) and the cold medium valve (x-V3) are closed, the high-temperature medium in the hot medium mother pipe enters the storage container (x-1) through the hot medium valve (x-V2); the cold medium valve (y-V3) of the yth storage unit storing low-temperature medium is opened, the ice slurry valve (y-V1) and the hot medium valve (y-V2) are closed, the low-temperature medium stored in the storage container (y-1) flows out from the second inlet and outlet (y-3) thereof, and then enters the cold medium mother pipe through the cold medium valve (y-V3); the ice slurry valve (z-V1) and the cold medium valve (z-V3) of the zth storage unit storing ice slurry are opened, the hot medium valve (z-V2) is closed, the low-temperature medium in the cold medium mother pipe flows into the storage container (z-1) through the cold medium valve (z-V3), and the ice slurry stored at the top is sent out through the first inlet and outlet (z-2) thereof, and then into the ice slurry mother pipe through the ice slurry valve (z-V1), and the cooling capacity and the heat storage capacity are adjusted by adjusting the flow of the medium into the storage container (y-1) and the storage container (z-1) and the medium flowing out of the storage container (x-1), and this stage continues until there is no ice slurry in the storage containers of all the storage units, and then enters the final stage;

[0027] In the final stage, the heat storage containers of the several heat storage units are filled with high-temperature medium, the heat storage container (d-1) of the dth heat storage unit is set to be empty, the heat storage containers of the remaining heat storage units are all filled with low-temperature medium, the cold medium valve (e-V3) of the e th heat storage unit storing the low-temperature medium is opened, the ice slurry valve (e-V1) and the hot medium valve (e-V2) are closed, the low-temperature medium stored in the heat storage container (e-1) flows out from the second inlet and outlet (e-3) thereof, enters the cold medium main pipe through the cold medium valve (e-V3); the hot medium valve (d-V2) of the dth heat storage unit is opened, the ice slurry valve (d-V1) and the cold medium valve (d-V3) are closed, the high-temperature medium in the hot medium main pipe enters the heat storage container (d-1) through the hot medium valve (d-V2), and all the heat storage containers of the remaining heat storage units are filled with high-temperature medium except the empty heat storage container.

[0028] The present application has the following advantages due to the above technical scheme.

[0029] The cold-heat storage system provided by the present application can realize the separation of high-temperature water, low-temperature water and ice slurry by arranging two or more heat storage units and changing the flow of high-temperature water, low-temperature water and ice slurry through the switching of valves, and can realize the complete isolation of high-temperature hot water and low-temperature cold water by arranging an empty heat storage pool as a buffer, thereby avoiding the loss caused by the mixing of cold and hot water due to long-term storage of the natural stratification type heat storage tank, and avoiding the double loss of the storage capacity of cold and heat caused by the mixing of ice slurry and high-temperature water, and greatly improving the storage efficiency of the system and the economy of the system. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a topology diagram of the cold-heat storage system provided by the present application embodiment 1;

[0031] Figure 2 is a topology diagram of the cold-heat storage system provided by the present application embodiment 2;

[0032] Figure 3 is a topology diagram of the cold-heat storage system provided by the present application embodiment 3;

[0033] Figure 4 is a topology diagram of the cold-heat storage system provided by the present application embodiment 4. DETAILED DESCRIPTION

[0034] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0035] In the description of the present application, it should be noted that the positions or position relationships indicated by the terms "upper", "lower" and the like are based on the positions or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the systems or elements referred to must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as a limitation on the present application.

[0036] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "assembly", "arrangement", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] The cold-heat storage heat storage system and the operation method thereof provided by the present application, the system comprises a hot water main pipe, a cold water main pipe and a plurality of heat storage units connected in parallel between the hot water main pipe and the cold water main pipe; each heat storage unit comprises a heat storage pool, a first inlet and a second inlet are arranged on the heat storage pool, the first inlet is connected to the hot water main pipe through a hot water valve, and the second inlet is connected to the cold water main pipe through a cold water valve; the heat storage pool releases stored hot water and makes cold water storage during the heating period, and releases stored cold water and makes hot water storage during the cooling period, so as to realize the functions of heat supply and cold storage during the heating period and cold supply and heat storage during the cooling period; the operation method of the system is to guide hot water or cold water to flow into the empty heat storage pool by switching the valve, and at the same time, cold water or hot water is released from one heat storage pool until it is empty, so as to avoid the cold water entering the heat storage pool storing hot water or the hot water entering the heat storage pool storing cold water, causing cold-heat neutralization, losing the storage capacity and the heat storage capacity, improving the heat storage efficiency of the cold-heat storage heat storage system, and reducing the heat storage cost.

[0038] Next, the cold-heat storage heat storage system and the operation method thereof provided by the embodiments of the present application will be described in detail with reference to the drawings.

[0039] Embodiment 1:

[0040] As Figure 1As shown, the cold-heat storage system provided by the embodiment comprises a hot water main pipe, a cold water main pipe, and N (N is a natural number greater than 2) storage units connected in parallel between the hot water main pipe and the cold water main pipe. Each storage unit comprises a storage pool (N-1), and each storage pool (N-1) is provided with a first inlet and outlet (N-2) and a second inlet and outlet (N-3). The first inlet and outlet (N-2) is connected to the hot water main pipe through a hot water valve (N-V2), and the second inlet and outlet (N-3) is connected to the cold water main pipe through a cold water valve (N-V3).

[0041] Based on the cold-heat storage system provided in the above embodiment, the present application further provides a method for operating the cold-heat storage system, comprising the following contents:

[0042] 1) Heat supply and cold storage mode: the storage pool (i-1) of the i th storage unit is set as an empty pool, the storage pools of a plurality of storage units are filled with high-temperature water (the temperature is preferably about 80-90℃, and the same below), the storage pools of the remaining storage units are filled with low-temperature water (the temperature is preferably about 5-10℃, and the same below), the cold water valve (i-V3) of the i th storage unit is opened, the hot water valve (i-V2) is closed, the low-temperature water in the cold water main pipe enters the storage pool (i-1) through the cold water valve (i-V3) and gradually fills the storage pool (i-1) with low-temperature water; the hot water valve (j-V2) of the j th storage unit filled with high-temperature water is opened, and the cold water valve (j-V3) is closed, the high-temperature water stored in the storage pool (j-1) flows out from the first inlet and outlet (j-2) and enters the hot water main pipe through the hot water valve (j-V2), and the water flow entering the storage pool (i-1) and flowing out of the storage pool (j-1) is adjusted to adjust the heat supply of the system until the storage pool (j-1) is empty.

[0043] 2) Cold supply and heat storage mode: the storage pool (i-1) of the i th storage unit is set as an empty pool, the storage pools of a plurality of storage units are filled with high-temperature water, the storage pools of the remaining storage units are filled with low-temperature water, the cold water valve (i-V3) of the i th storage unit is closed, and the hot water valve (i-V2) is opened, the high-temperature water in the hot water main pipe enters the storage pool (i-1) through the hot water valve (i-V2) and gradually fills the storage pool (i-1) with high-temperature water; the hot water valve (j-V2) of the j th storage unit filled with low-temperature water is closed, and the cold water valve (j-V3) is opened, the low-temperature water stored in the storage pool (j-1) flows out from the second inlet and outlet (j-3) and enters the cold water main pipe through the cold water valve (j-V3), and the water flow entering the storage pool (i-1) and flowing out of the storage pool (j-1) is adjusted to adjust the cold supply of the system until the storage pool (j-1) is empty.

[0044] The above operation method makes each heat storage tank storing high-temperature water empty first and then store low-temperature water in the heating period, and makes each heat storage tank storing low-temperature water empty first and then store high-temperature water in the cooling period, so as to avoid the loss of a large amount of heat storage and cold storage caused by long-time placement of high-temperature water and low-temperature water in one heat storage tank.

[0045] Embodiment 2

[0046] As shown in Figure 2 The cold-heat storage heat storage system provided in the embodiment further includes an ice slurry mother pipe, and the first inlet and outlet (N-2) of the heat storage tank (N-1) is connected to the ice slurry mother pipe and the hot water mother pipe through the ice slurry valve (N-V1) and the hot water valve (N-V2) respectively on the basis of the embodiment 1.

[0047] Based on the cold-heat storage heat storage system provided in the above embodiments, the application further provides an operation method of the cold-heat storage heat storage system, which includes the following contents:

[0048] 1) Heat storage ice mode: in the starting stage, all heat storage units are filled with high-temperature water, the ice slurry valve (i-V1) of the i-th heat storage unit is closed, the hot water valve (i-V2) and the cold water valve (i-V3) are opened, the low-temperature water in the cold water mother pipe enters the heat storage tank (i-1) through the cold water valve (i-V3), and the high-temperature water originally stored in the heat storage tank (i-1) is sent out from the first inlet and outlet (i-2) and then sent into the hot water mother pipe through the hot water valve (i-V2), the water flow into the heat storage tank (i-1) is adjusted to adjust the heat supply of the system, and this stage continues until the heat storage tank (i-1) discharges all the high-temperature water and is filled with low-temperature water, and then enters the intermediate stage.

[0049] In the middle stage, the storage tanks of some of the thermal storage units are already filled with low temperature water, and the storage tanks of the rest of the thermal storage units are still filled with high temperature water. The ice slurry valve (j-V1) and the cold water valve (j-V3) of the jth thermal storage unit filled with low temperature water are opened, and the hot water valve (j-V2) is closed. The ice slurry from the ice slurry main pipe enters the storage tank (j-1) through the ice slurry valve (j-V1). Since the density of ice crystals is lower than that of water, the ice slurry will float on the top of the storage tank (j-1) after entering the storage tank (j-1), and the bottom of the storage tank (j-1) will be filled with low temperature water. The low temperature water stored in the storage tank (j-1) is sent out through the second inlet and outlet (j-3) of the storage tank (j-1) and enters the cold water main pipe through the cold water valve (j-V3). The low temperature water in the cold water main pipe enters the storage tank (k-1) through the cold water valve (k-V3), and the high temperature water originally stored in the storage tank (k-1) is sent out through the first inlet and outlet (k-2) of the storage tank (k-1) and enters the hot water main pipe through the hot water valve (k-V3). The heat supply and ice storage of the system are adjusted by adjusting the water flow and ice slurry flow into each storage tank. This stage continues until all the storage tanks of the thermal storage units are filled with low temperature water, and then enters the final stage.

[0050] In the final stage, the storage tanks of some of the thermal storage units are already filled with ice slurry, and the storage tanks of the rest of the thermal storage units are filled with low temperature water. The ice slurry valve (l-V1) and the cold water valve (l-V3) of the lth thermal storage unit filled with low temperature water are opened, and the hot water valve (l-V2) is closed. The ice slurry from the ice slurry main pipe enters the storage tank (l-1) through the ice slurry valve (l-V1). Since the density of ice crystals is lower than that of water, the ice slurry will float on the top of the storage tank (l-1) after entering the storage tank (l-1), and the bottom of the storage tank (l-1) will be filled with low temperature water. The low temperature water stored in the storage tank (l-1) is sent out through the second inlet and outlet (l-3) of the storage tank (l-1) and enters the cold water main pipe through the cold water valve (l-V3). The heat supply and ice storage of the system are adjusted by adjusting the ice slurry flow into each storage tank. This stage continues until all the storage tanks of the thermal storage units are filled with ice slurry.

[0051] 2) Cooling and heat storage mode: In the initial stage, all the ice slurry storages are filled with ice slurry, the ice slurry valve (a-V1) and the cold water valve (a-V3) of the a-th storage are opened, and the hot water valve (a-V2) is closed. The low-temperature water in the cold water main pipe flows into the a-th storage (a-1) through the cold water valve (a-V3), and the ice slurry stored at the top is sent out through the first inlet and outlet (a-2) of the a-th storage, and then is sent into the ice slurry main pipe through the ice slurry valve (a-V1). The cooling capacity of the system is adjusted by adjusting the water flow rate into the storage. This stage continues until the water flowing out of the first inlet and outlet (a-2) of the a-th storage (a-1) no longer contains ice slurry, at which time it is considered that the a-th storage (a-1) has released all the ice slurry and is filled with low-temperature water, and then enters the intermediate stage.

[0052] In the intermediate stage, the ice slurry storages of some storages are filled with low-temperature water, and the ice slurry storages of the remaining storages are still filled with ice slurry. The ice slurry valve (b-V1) of the b-th storage filled with low-temperature water is closed, and the hot water valve (b-V2) and the cold water valve (b-V3) are opened. The high-temperature water in the hot water main pipe flows into the b-th storage (b-1) through the hot water valve (b-V2), and the low-temperature water is sent out from the second inlet and outlet (b-3) of the b-th storage (b-1) and then is sent into the cold water main pipe through the cold water valve (b-V3). The ice slurry valve (c-V1) and the cold water valve (c-V3) of the c-th storage filled with ice slurry are opened, and the hot water valve (c-V2) is closed. The low-temperature water in the cold water main pipe flows into the c-th storage (c-1) through the cold water valve (c-V3), and the ice slurry stored at the top is sent out through the first inlet and outlet (c-2) of the c-th storage and then is sent into the ice slurry main pipe through the ice slurry valve (c-V1). The cooling capacity and the heat storage capacity of the system are adjusted by adjusting the water flow rate into each storage. This stage continues until there is no ice slurry in the ice slurry storages of all the storages, and then enters the final stage.

[0053] In the final stage, the ice slurry storages of some storages are filled with high-temperature water, and the ice slurry storages of the remaining storages are filled with low-temperature water. The ice slurry valve (d-V1) of the d-th storage filled with low-temperature water is closed, and the hot water valve (d-V2) and the cold water valve (d-V3) are opened. The high-temperature water in the hot water main pipe flows into the d-th storage (d-1) through the hot water valve (d-V2), and the low-temperature water is sent out from the second inlet and outlet (d-3) of the d-th storage (d-1) and then is sent into the cold water main pipe through the cold water valve (d-V3). The cooling capacity and the heat storage capacity of the system are adjusted by adjusting the water flow rate into each storage. This stage continues until all the ice slurry storages are filled with high-temperature water.

[0054] The above operation method makes each heat storage tank filled with high-temperature water be replaced by low-temperature water first, and then sends ice slurry into the heat storage tank filled with low-temperature water during the heating period; and makes each heat storage tank filled with ice slurry be replaced by low-temperature water first, and then stores high-temperature water in the heat storage tank during the cooling period, so that the ice slurry and the high-temperature water are not located in one heat storage tank at the same time, and the loss of a large amount of heat storage and cold storage caused by the floating of ice crystals and the direct heat exchange between the high-temperature water at the upper part and the ice crystals is avoided.

[0055] Embodiment 3

[0056] As shown in Figure 3 , the cold-heat storage heat storage system provided in the embodiment is based on the embodiment 2, and a third inlet and outlet (i-4) is additionally arranged on each heat storage tank (N-1) of each heat storage unit. The third inlet and outlet (i-4) is connected to the ice slurry mother pipe through an ice slurry valve (i-V1). Thus, when the ice slurry is stored, the ice slurry enters the heat storage tank (i-1) filled with low-temperature water through the third inlet and outlet (i-4). Because the ice crystals contained in the ice slurry have a smaller density, the ice crystals automatically float to the top of the heat storage tank (i-1), and the water in the ice slurry and the original low-temperature water in the heat storage tank (i-1) are sent out to the cold water mother pipe through the second inlet and outlet (i-3). When the ice slurry is released for cooling, the low-temperature water entering the heat storage tank (i-1) through the second inlet and outlet (i-3) exchanges heat with the ice crystals at the bottom of the ice slurry layer to melt the ice crystals, and the water temperature is further reduced to about 0℃. Then, the low-temperature water is sent out to the ice slurry mother pipe through the third inlet and outlet (i-4). At this time, the ice slurry is not sent into the ice slurry mother pipe, but the low-temperature water is sent into the ice slurry mother pipe.

[0057] The cold-heat storage heat storage system provided in the embodiment can avoid the blockage problem caused by the aggregation of ice crystals near the first inlet and outlet (N-2) of the heat storage tank (N-1), and the ice slurry is sent into the bottom of the heat storage tank, and the ice melting cooling mode is used.

[0058] Embodiment 4

[0059] As shown in Figure 4 , the cold-heat storage heat storage system provided in the embodiment is based on the embodiment 3, and the first inlet and outlet (i-2) of all the heat storage tanks (N-1) is connected to the ice slurry mother pipe through an ice slurry valve (N-V1), and the third inlet and outlet (i-4) of all the heat storage tanks (N-1) is connected to the hot water mother pipe through a hot water valve (N-V2).

[0060] Based on the cold-heat storage heat storage system provided in the above embodiments, the application further provides an operation method of the cold-heat storage heat storage system, which includes the following contents:

[0061] 1) Heat supply and ice storage mode: in the initial stage, the storage tank (i-1) of the ith regenerator is set as empty tank, the storage tanks of the rest regenerators are filled with high temperature water, the cold water valve (i-V3) of the ith regenerator is opened, the ice slurry valve (i-vl) and the hot water valve (i-V2) are closed, the low temperature water in the cold water main pipe enters the storage tank (i-1) through the cold water valve (i-V3) and gradually fills the storage tank (i-1) with low temperature water; the hot water valve (j-V2) of the jth regenerator, which is filled with high temperature water, is opened, the ice slurry valve (j-Vl) and the cold water valve (j-V3) are closed, the high temperature water stored in the storage tank (j-1) flows out from the third inlet and outlet (j-4) thereof, enters the hot water main pipe through the hot water valve (j-V2), the heat supply of the system is adjusted by adjusting the water flow rate into the storage tank (i-1) and out of the storage tank (j-1), and the system enters the intermediate stage after the storage tank (j-1) is emptied.

[0062] In the intermediate stage, the storage tanks of some regenerators are filled with low temperature water, and the storage tanks of some regenerators are filled with ice slurry, the storage tank (a-1) of the ath regenerator is set as empty tank, the storage tanks of the rest regenerators are filled with high temperature water, the cold water valve (a-V3) of the ath regenerator is opened, the ice slurry valve (a-vl) and the hot water valve (a-V2) are closed, the low temperature water in the cold water main pipe enters the storage tank (a-1) through the cold water valve (a-V3) and gradually fills the storage tank (a-1) with low temperature water; the ice slurry valve (b-Vl) and the cold water valve (b-V3) of the bth regenerator, which is filled with low temperature water, are opened, the hot water valve (b-V2) is closed, the ice slurry enters the storage tank (b-1) from the ice slurry main pipe through the ice slurry valve (b-Vl), the low temperature water at the bottom of the storage tank (b-1) is sent out through the second inlet and outlet (b-3) thereof and sent into the cold water main pipe through the cold water valve (b-V3); the hot water valve (c-V2) of the cth regenerator, which is filled with hot water, is opened, the ice slurry valve (c-Vl) and the cold water valve (c-V3) are closed, the high temperature water stored in the storage tank (c-1) flows out from the third inlet and outlet (c-4) thereof, enters the hot water main pipe through the hot water valve (c-V2), the heat supply and the ice storage are adjusted by adjusting the ice slurry into the storage tank (b-1) and the water flow rate into the storage tank (a-1) and out of the storage tank (c-1), and the system enters the final stage after the high temperature water stored in the rest storage tanks except the empty storage tank is released.

[0063] At the end stage, the ice slurry storage tanks of several thermal storage units are full of ice slurry, the ice slurry storage tank (k-1) of the kth thermal storage unit is empty, the ice slurry storage tanks of the rest of the thermal storage units are full of cold water, the ice slurry valve (l-V1) and the cold water valve (l-V3) of the lth thermal storage unit full of cold water are opened, and the hot water valve (l-V2) is closed. The ice slurry from the ice slurry main pipe enters the ice slurry storage tank (l-1) through the ice slurry valve (l-V1), and the cold water stored at the bottom of the ice slurry storage tank (l-1) is sent out through the second inlet and outlet (l-3) and enters the cold water main pipe through the cold water valve (l-V3). The heating capacity and ice storage of the system are adjusted by adjusting the flow of ice slurry into each ice slurry storage tank, and all the ice slurry storage tanks of the rest of the thermal storage units are full of ice slurry except for one empty ice slurry storage tank.

[0064] 2) Cooling and heat storage mode: At the beginning stage, the ice slurry storage tank of one thermal storage unit is empty, and the ice slurry storage tanks of the rest of the thermal storage units are full of ice slurry. The ice slurry valve (w-V1) and the cold water valve (w-V3) of the wth thermal storage unit full of ice slurry are opened, and the hot water valve (w-V2) is closed. The cold water in the cold water main pipe flows into the ice slurry storage tank (w-1) through the cold water valve (w-V3), and the ice slurry stored at the top is sent out through the first inlet and outlet (w-2) and enters the ice slurry main pipe through the ice slurry valve (w-V1). The cooling capacity of the system is adjusted by adjusting the flow of water into the ice slurry storage tank. This stage continues until the water at the top of the ice slurry storage tank (w-1) no longer contains ice slurry, at which point it is considered that the ice slurry storage tank (w-1) has released all the ice slurry and is full of cold water, and then enters the intermediate stage.

[0065] In the middle stage, the storage water tanks of some of the thermal storage units are filled with cold water, the storage water tanks of some of the thermal storage units are filled with ice slurry, the storage water tank of the xth thermal storage unit (x-1) is set as an empty tank, the storage water tanks of the rest of the thermal storage units are filled with high-temperature water, the high-temperature water valve (x-V2) of the xth thermal storage unit is opened, the ice slurry valve (x-V1) and the cold water valve (x-V3) are closed, the high-temperature water in the hot water mother pipe enters the storage water tank (x-1) through the high-temperature water valve (x-V2) and gradually fills the storage water tank (x-1) with hot water; the cold water valve (y-V3) of the yth thermal storage unit filled with low-temperature water is opened, the ice slurry valve (y-V1) and the high-temperature water valve (y-V2) are closed, the low-temperature water stored in the storage water tank (y-1) flows out from the second inlet and outlet (y-3) thereof, enters the cold water mother pipe through the cold water valve (y-V3); the ice slurry valve (z-V1) and the cold water valve (z-V3) of the zth thermal storage unit filled with ice slurry are opened, the high-temperature water valve (z-V2) is closed, the low-temperature water in the cold water mother pipe flows into the storage water tank (z-1) through the cold water valve (z-V3), and the ice slurry stored at the top is sent out through the first inlet and outlet (z-2) thereof, enters the ice slurry mother pipe through the ice slurry valve (z-V1), and the cooling capacity and the heat storage capacity are adjusted by adjusting the water flow rate into the storage water tanks (y-1) and (z-1) and the water flow rate out of the storage water tank (x-1), and this stage continues until there is no ice slurry in the storage water tanks of all the thermal storage units, and then the final stage is entered.

[0066] In the final stage, the storage water tanks of some of the thermal storage units are filled with high-temperature water, the storage water tank (d-1) of the dth thermal storage unit is set as an empty tank, the storage water tanks of the rest of the thermal storage units are filled with low-temperature water, the cold water valve (e-V3) of the e th thermal storage unit filled with low-temperature water is opened, the ice slurry valve (e-V1) and the high-temperature water valve (e-V2) are closed, the low-temperature water stored in the storage water tank (e-1) flows out from the second inlet and outlet (e-3) thereof, enters the cold water mother pipe through the cold water valve (e-V3); the high-temperature water valve (d-V2) of the dth thermal storage unit is opened, the ice slurry valve (d-V1) and the cold water valve (d-V3) are closed, the high-temperature water in the hot water mother pipe enters the storage water tank (d-1) through the high-temperature water valve (d-V2) and gradually fills the storage water tank (d-1) with high-temperature water, and all the storage water tanks of the thermal storage units are filled with high-temperature water except for one empty storage water tank.

[0067] The cold and heat storage system and the operation method thereof provided in the embodiment always leave an empty storage water tank to completely separate the high-temperature water and the low-temperature water, further avoid the mixing of the high-temperature water and the low-temperature water due to long-time placement in the traditional natural stratification type storage water tank, reduce the cold and heat loss, and further improve the heat storage and cold storage efficiency compared to the embodiments 2 and 3.

[0068] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; and although the present application has been described in detail with reference to the foregoing embodiments, it should be appreciated by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A combined cooling and heating heat storage system, characterized in that, It includes a heat medium header, a cold medium header, and several heat storage units connected in parallel between the heat medium header and the cold medium header; each heat storage unit includes a heat storage container, and the heat storage container is provided with a first inlet and a second inlet and a second inlet and a third inlet and a fourth inlet and a fifth inlet and a sixth ... It also includes an ice slurry header, and the heat storage container is also provided with a third inlet and outlet, which are connected to the ice slurry header via ice slurry valves.

2. A combined cooling and heating storage heat system, characterized in that, It includes a heat medium header, a cold medium header, an ice slurry header, and several heat storage units connected in parallel between the heat medium header, the cold medium header, and the ice slurry header; each heat storage unit includes a heat storage container, which is provided with a first inlet and outlet, a second inlet and outlet, and a third inlet and outlet. The first inlet and outlet are connected to the ice slurry header through an ice slurry valve, the second inlet and outlet are connected to the cold medium header through a cold medium valve, and the third inlet and outlet are connected to the heat medium header through a heat medium valve.

3. The combined cooling and heating storage heat system according to claim 1 or 2, characterized in that, The heating medium is high-temperature water at around 80~90℃, and the cooling medium is low-temperature water at around 5~10℃.

4. A method for operating a combined cooling and heating storage heat system as described in claim 1 or 2, characterized in that, During the heating season, the combined heating and cooling storage system operates in heating and ice storage mode, which means that each heat storage container storing high-temperature medium is first completely replaced with low-temperature medium, and then ice slurry is sent into the heat storage container storing low-temperature medium; during the cooling season, the combined heating and cooling storage system operates in cooling and heat storage mode, which means that each heat storage container storing ice slurry is first completely replaced with low-temperature medium, and then high-temperature medium is stored into it.

5. The operating method according to claim 4, characterized in that, When using the combined heating and cooling storage system as described in claim 1, the operation of the heating and ice storage mode is as follows: In the initial stage, all heat storage containers of the heat storage units are filled with high-temperature medium. The ice slurry valve (i-V1) of the i-th heat storage unit is closed, and the hot medium valve (i-V2) and cold medium valve (i-V3) are opened. The low-temperature medium in the cold medium header enters the heat storage container (i-1) after passing through the cold medium valve (i-V3). The high-temperature medium originally stored in the heat storage container (i-1) is sent out through its first inlet and outlet (i-2) and then sent into the hot medium header after passing through the hot medium valve (i-V2). The heat supply of the system is adjusted by regulating the flow rate of the medium entering the heat storage container (i-1). This stage continues until the heat storage container (i-1) releases all the stored high-temperature medium and is filled with low-temperature medium, and then enters the intermediate stage. In the intermediate stage, the heat storage containers of several heat storage units are filled with low-temperature medium, while the heat storage containers of the remaining heat storage units are still filled with high-temperature medium. The ice slurry valve (j-V1) and cold medium valve (j-V3) of the j-th heat storage unit, which is filled with low-temperature medium, are opened, while the hot medium valve (j-V2) is closed. Ice slurry flows from the ice slurry header through the ice slurry valve (j-V1) into the heat storage container (j-1). The low-temperature medium stored in the heat storage container (j-1) is discharged through its second inlet / outlet (j-3) and then through the cold medium valve (j-V3) into the cold medium header. The heat storage container of the k-th heat storage unit, which is filled with high-temperature hot medium... The ice slurry valve (k-V1) is closed, and the hot medium valve (k-V2) and cold medium valve (k-V3) are opened. The low-temperature medium in the cold medium header enters the heat storage container (k-1) after passing through the cold medium valve (k-V3). The high-temperature medium originally stored in the heat storage container (k-1) is sent out through its first inlet and outlet (k-2) and then sent into the hot medium header after passing through the hot medium valve (k-V3). The heat supply and ice storage capacity of the system are adjusted by regulating the flow rate of the medium entering each heat storage container and the flow rate of the ice slurry. This stage continues until there is no high-temperature medium in the heat storage containers of all heat storage units, and then the final stage begins. In the final stage, the heat storage containers of several heat storage units are filled with ice slurry, and the heat storage containers of the remaining heat storage units are filled with cryogenic medium. The ice slurry valve (l-V1) and the cold medium valve (l-V3) of the l-th heat storage unit, which is filled with cryogenic medium, are opened, and the hot medium valve (l-V2) is closed. The ice slurry enters the heat storage container (l-1) from the ice slurry header pipe through the ice slurry valve (l-V1). The cryogenic medium stored in the heat storage container (l-1) is sent out through its second inlet and outlet (l-3), and then sent into the cold medium header pipe after passing through the cold medium valve (l-V3). The heat supply and ice storage capacity of the system are adjusted by regulating the flow rate of ice slurry entering each heat storage container. This stage continues until the heat storage containers of all heat storage units are filled with ice slurry. The operation process of the cooling and heat storage mode is as follows: In the initial stage, the heat storage containers of all heat storage units are filled with ice slurry. The ice slurry valve (a-V1) and cold medium valve (a-V3) of the a-th heat storage unit are opened, and the hot medium valve (a-V2) is closed. The low-temperature medium in the cold medium header flows into the heat storage container (a-1) after passing through the cold medium valve (a-V3). The ice slurry stored at the top is sent out through its first inlet and outlet (a-2), and after passing through the ice slurry valve (a-V1), it is sent into the ice slurry header. The cooling capacity of the system is adjusted by regulating the flow rate of the medium entering the heat storage container. This stage continues until the medium flowing out of the first inlet and outlet (a-2) of the heat storage container (a-1) no longer contains ice slurry, and then the intermediate stage is entered. In the intermediate stage, the heat storage containers of several heat storage units are filled with cryogenic medium, while the heat storage containers of the remaining heat storage units are still filled with ice slurry. The ice slurry valve (b-V1) of the b-th heat storage unit, which is filled with cryogenic medium, is closed, while the hot medium valve (b-V2) and cold medium valve (b-V3) are opened. The high-temperature medium flows from the hot medium header through the hot medium valve (b-V2) into the heat storage container (b-1), while the cryogenic medium is sent out from the second inlet / outlet (b-3) of the heat storage container (b-1), passes through the cold medium valve (b-V3), and then flows into the cold medium header. The heat storage container filled with ice slurry... The ice slurry valve (c-V1) and cold medium valve (c-V3) of each of the c heat storage units are open, while the hot medium valve (c-V2) is closed. The low-temperature medium in the cold medium header flows into the heat storage container (c-1) after passing through the cold medium valve (c-V3). The ice slurry stored at the top is sent out through its first inlet and outlet (c-2), and then sent into the ice slurry header after passing through the ice slurry valve (c-V1). The cooling capacity and heat storage capacity of the system are adjusted by regulating the flow rate of the medium entering each heat storage container. This stage continues until there is no ice slurry in the heat storage containers of all heat storage units, and then the final stage begins. In the final stage, the heat storage containers of several heat storage units are filled with high-temperature medium, while the heat storage containers of the remaining heat storage units are filled with low-temperature medium. The ice slurry valve (d-V1) of the d-th heat storage unit, which is filled with low-temperature medium, is closed, while the hot medium valve (d-V2) and cold medium valve (d-V3) are opened. The high-temperature medium enters the heat storage container (d-1) from the hot medium header through the hot medium valve (d-V2), while the low-temperature medium is sent out from the second inlet and outlet (d-3) of the heat storage container (d-1), and then sent into the cold medium header after passing through the cold medium valve (d-V3). The cooling capacity and heat storage capacity of the system are adjusted by regulating the flow rate of the medium entering the heat storage container. This stage continues until the heat storage containers of all heat storage units are filled with high-temperature medium.

6. The operating method according to claim 4, characterized in that, When using the combined heating and cooling storage system as described in claim 2, the operation process of the heating and ice storage mode is as follows: In the initial stage, the heat storage container (i-1) of the i-th heat storage unit is set to empty, and the heat storage containers of the remaining heat storage units are filled with high-temperature medium. The cold medium valve (i-V3) of the i-th heat storage unit is opened, and the ice slurry valve (i-v1) and the hot medium valve (i-V2) are closed. The low-temperature medium in the cold medium header passes through the cold medium valve (i-V3) and enters the heat storage container (i-1). The heat medium valve (j-V2) of the j-th heat storage unit storing the high-temperature medium is opened, while the ice slurry valve (j-V1) and the cold medium valve (j-V3) are closed. The high-temperature medium stored in the heat storage container (j-1) flows out from its third inlet and outlet (j-4), passes through the heat medium valve (j-V2), and enters the heat medium header. The system heat supply is adjusted by regulating the flow rate of the medium entering the heat storage container (i-1) and flowing out of the heat storage container (j-1). After the heat storage container (j-1) is emptied, the intermediate stage begins. In the intermediate stage, several heat storage units have their heat storage containers filled with low-temperature medium, and several heat storage units have their heat storage containers filled with ice slurry. The heat storage container (a-1) of the a-th heat storage unit is left empty, while the heat storage containers of the remaining heat storage units are filled with high-temperature medium. The cold medium valve (a-V3) of the a-th heat storage unit is opened, while the ice slurry valve (a-V1) and hot medium valve (a-V2) are closed. The low-temperature medium in the cold medium header enters the heat storage container (a-1) after passing through the cold medium valve (a-V3). Similarly, the ice slurry valve (b-V1) and cold medium valve (b-V3) of the b-th heat storage unit, which is filled with low-temperature medium, are opened, while the hot medium valve (b-V2) is closed. The ice slurry enters the heat storage container (b-1) from the ice slurry header through the ice slurry valve (b-V1). The low-temperature medium at the bottom of the device (b-1) is sent out through its second inlet and outlet (b-3), and after passing through the cold medium valve (b-V3), it is sent into the cold medium header. The hot medium valve (c-V2) of the cth heat storage unit, which is full of high-temperature medium, is opened, and the ice slurry valve (c-V1) and the cold medium valve (c-V3) are closed. The high-temperature medium stored in the heat storage container (c-1) flows out from its third inlet and outlet (c-4), and after passing through the hot medium valve (c-V2), it enters the hot medium header. The heat supply and ice storage are adjusted by regulating the flow rate of ice slurry entering the heat storage container (b-1), the medium entering the heat storage container (a-1), and the medium flowing out of the heat storage container (c-1). After all the high-temperature medium stored in the remaining heat storage containers except for one empty heat storage container is released, the final stage begins. In the final stage, the heat storage containers of several heat storage units are filled with ice slurry. The heat storage container (k-1) of the k-th heat storage unit is set to empty, and the heat storage containers of the remaining heat storage units are filled with cryogenic medium. The ice slurry valve (l-V1) and the cold medium valve (l-V3) of the l-th heat storage unit storing the cryogenic medium are opened, and the hot medium valve (l-V2) is closed. The ice slurry enters the heat storage container (l-1) from the ice slurry header pipe through the ice slurry valve (l-V1). The cryogenic medium stored at the bottom of the heat storage container (l-1) is sent out through its second inlet and outlet (l-3), and then sent into the cold medium header pipe after passing through the cold medium valve (l-V3). The heat supply and ice storage capacity of the system are adjusted by regulating the flow rate of ice slurry entering each heat storage container. Except for one empty heat storage container, the heat storage containers of all other heat storage units are filled with ice slurry. The operation process of the cooling and heat storage mode is as follows: In the initial stage, the heat storage container of one heat storage unit is empty, and the heat storage containers of the remaining heat storage units are filled with ice slurry. The ice slurry valve (w-V1) and cold medium valve (w-V3) of the w-th heat storage unit filled with ice slurry are opened, and the hot medium valve (w-V2) is closed. The low temperature medium in the cold medium header flows into the heat storage container (w-1) after passing through the cold medium valve (w-V3). The ice slurry stored at the top is sent out through its first inlet and outlet (w-2), and after passing through the ice slurry valve (w-V1), it is sent into the ice slurry header. The cooling capacity of the system is adjusted by regulating the flow rate of the medium entering the heat storage container. This stage continues until the medium flowing out of the first inlet and outlet (w-2) of the heat storage container (w-1) no longer contains ice slurry, and then the intermediate stage is entered. In the intermediate stage, several heat storage units have their heat storage containers filled with cold medium, and several heat storage units have their heat storage containers filled with ice slurry. The heat storage container (x-1) of the x-th heat storage unit is left empty, while the heat storage containers of the remaining heat storage units are filled with high-temperature medium. The hot medium valve (x-V2) of the x-th heat storage unit is opened, while the ice slurry valve (x-V1) and cold medium valve (x-V3) are closed. The high-temperature medium in the hot medium header passes through the hot medium valve (x-V2) and enters the heat storage container (x-1). Meanwhile, the cold medium valve (y-V3) of the y-th heat storage unit, which stores low-temperature medium, is opened, while the ice slurry valve (y-V1) and hot medium valve (y-V2) are closed. The low-temperature medium stored in the heat storage container (y-1) flows from its second inlet / outlet (y-... 3) The ice slurry flows out and enters the cold medium header after passing through the cold medium valve (y-V3); the ice slurry valve (z-V1) and cold medium valve (z-V3) of the z-th heat storage unit are opened, and the hot medium valve (z-V2) is closed. The low-temperature medium in the cold medium header flows into the heat storage container (z-1) after passing through the cold medium valve (z-V3). The ice slurry stored at the top is sent out through its first inlet and outlet (z-2), and after passing through the ice slurry valve (z-V1), it is sent into the ice slurry header. The cooling capacity and heat storage capacity are adjusted by regulating the flow rate of the medium entering the heat storage container (y-1) and the heat storage container (z-1) and flowing out of the heat storage container (x-1). This stage continues until there is no ice slurry in the heat storage containers of all heat storage units, and then the final stage begins. In the final stage, the heat storage containers of several heat storage units are filled with high-temperature medium. The heat storage container (d-1) of the d-th heat storage unit is set to empty, and the heat storage containers of the remaining heat storage units are filled with low-temperature medium. The cold medium valve (e-V3) of the e-th heat storage unit storing low-temperature medium is opened, and the ice slurry valve (e-V1) and the hot medium valve (e-V2) are closed. The low-temperature medium stored in the heat storage container (e-1) flows out from its second inlet and outlet (e-3), passes through the cold medium valve (e-V3), and enters the cold medium header. The hot medium valve (d-V2) of the d-th heat storage unit is opened, and the ice slurry valve (d-V1) and the cold medium valve (d-V3) are closed. The high-temperature medium in the hot medium header enters the heat storage container (d-1) after passing through the hot medium valve (d-V2). Except for one empty heat storage container, the heat storage containers of all other heat storage units are filled with high-temperature medium.

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