A heating peak-shaving device based on heat storage

Abstract

The present invention relates to a heat supply peak-shaving device based on heat storage, comprising a heat source, a heat storage body, a heat exchanger, a heat pump unit and a first group of heat users; the heat source is connected to the first group of heat users through a water supply pipeline and a return pipeline, the water supply pipeline and the return pipeline are respectively provided with a switch valve 1, and the water supply pipeline is connected to the heat storage body through a heat storage water supply pipeline, the return pipeline is connected to the heat storage body through a heat storage return pipeline, and the heat storage water supply pipeline and the heat storage return pipeline are both provided with a switch valve 2; and the heat storage body, the heat exchanger and the heat pump unit are connected between the heat source and the first group of heat users. The present invention not only meets the heating demand, but also avoids the waste of waste heat in the early cold period by recycling the waste heat in the severe cold period, reduces the gas consumption in the severe cold period, reduces carbon emissions, and improves the economy of system operation.

Description

Technical Field

[0001] The present invention belongs to the field of energy and power, and in particular relates to a heat supply peak regulation device based on heat storage. Background Art

[0002] In order to actively respond to climate change, my country has proposed carbon peak and carbon neutrality goals. With the advancement of various national policies, measures and requirements, the regional boiler room heating method widely used in centralized heating systems has gradually been replaced by cogeneration or industrial waste heat heating due to high carbon emissions and high operating costs.

[0003] However, neither cogeneration power plants nor industrial waste heat can support a wide range of load changes. Therefore, a new heating mode has been developed in which cogeneration or industrial waste heat bears the basic load and boilers are used as peak-shaving heat sources for heating. However, this mode still has two problems. On the one hand, during the early cold period, due to the limitations of power dispatching and peak-shaving capabilities, the heat of the power plant cannot be fully recovered for heating, and part of the heat needs to be discharged into the environment. On the other hand, during the severe cold period, peak-shaving heat sources such as boilers are needed to supplement the heat, which still has large carbon emissions and poor economic efficiency. Summary of the invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a heating peak-shaving device based on heat storage, which stores the heat discharged in the early cold period and releases the heat in the severe cold period, thereby reducing the fuel consumption of the peak-shaving heat source, improving the operating economy of the heating network, and reducing carbon emissions; in addition, by preheating the heat storage body using natural heat sources or industrial waste heat in the non-heating season, the heat source cost of heat storage in the early cold period can be further reduced.

[0005] The first aspect of the present invention provides a heat peak regulation device based on heat storage, comprising a heat source, a heat storage body, a heat exchanger, a heat pump unit and a first group of heat users; the heat source is connected to the first group of heat users through a water supply pipeline and a water return pipeline, the water supply pipeline and the water return pipeline are respectively provided with a first switch valve, and the water supply pipeline is connected to the heat storage body through a heat storage water supply pipeline, the water return pipeline is connected to the heat storage body through a heat storage water return pipeline, and the heat storage water supply pipeline and the heat storage water return pipeline are both provided with a second switch valve;

[0006] The heat storage body, heat exchanger and heat pump unit are connected between the heat source and the first group of heat users. When the heat demand of the first group of heat users is less than the heating capacity of the heat source, the heat source provides heat to the heat storage body and the first group of heat users. When the heat demand of the first group of heat users is greater than the heating capacity of the heat source, the heat source, heat storage body, heat exchanger and heat pump unit provide heat to the first group of heat users.

[0007] Furthermore, the heat storage body and the heat exchanger are connected via a heat storage body water outlet pipe, the heat storage body and the heat pump unit are connected via a heat storage body water inlet pipe, and a switch valve four is provided on the heat storage body water outlet pipe. When the switch valve four is connected, the hot water in the heat storage body enters the heat exchanger and the heat pump unit to release heat and cool down, and the cooled water enters the heat storage body again.

[0008] Furthermore, the return pipes on both sides of the switch valve 1 are respectively connected to the second return pipe and the second water supply pipe, the second return pipe is provided with a switch valve 3, and the heat exchanger and the heat pump unit are connected in parallel between the second return pipe and the second water supply pipe.

[0009] Furthermore, the return pipes on both sides of the switch valve 1 are respectively connected to the second return pipe and the second water supply pipe, the second return pipe is provided with a switch valve 3, and the heat exchanger and the heat pump unit are connected in series and connected between the second return pipe and the second water supply pipe.

[0010] Furthermore, the return water pipeline on the right side of the switch valve is connected to the second return water pipeline, the water supply pipeline is connected to the second water supply pipeline, and the heat exchanger and the heat pump unit are connected in parallel between the second return water pipeline and the second water supply pipeline.

[0011] Furthermore, the second water return pipeline and the second water supply pipeline are both provided with a switch valve three, and the switch valve three on the second water supply pipeline is connected in parallel with a boiler.

[0012] The second aspect of the present invention provides a heat peak regulation device based on heat storage, comprising a heat source, a heat storage body, a heat exchanger, a heat pump unit, a first group of heat users and a second group of heat users, wherein the heat source is connected to the first group of heat users via a water supply pipeline and a water return pipeline, and the water supply pipeline is connected to the heat storage body via a heat storage water supply pipeline, and the water return pipeline is connected to the heat storage body via a heat storage water return pipeline, and the heat storage water supply pipeline and the heat storage water return pipeline are both provided with a second switch valve;

[0013] The heat storage body, heat exchanger and heat pump unit are connected between the heat source and the second group of heat users. When the total heat demand of the first group of heat users and the second group of heat users is less than the heating capacity of the heat source, the heat source provides heat to the heat storage body, the first group of heat users and the second group of heat users. When the total heat demand of the first group of heat users and the second group of heat users is greater than the heating capacity of the heat source, the heat source provides heat to the first group of heat users, and the heat storage body, heat exchanger and heat pump unit provide heat to the second group of heat users.

[0014] Furthermore, the heat storage body and the heat exchanger are connected via a heat storage body water outlet pipe, the heat storage body and the heat pump unit are connected via a heat storage body water inlet pipe, and a switch valve four is provided on the heat storage body water outlet pipe. When the switch valve four is connected, the hot water in the heat storage body enters the heat exchanger and the heat pump unit to release heat and cool down, and the cooled water enters the heat storage body again.

[0015] Furthermore, the second group of heat users is connected to a second return water pipeline and a second water supply pipeline, and the heat exchanger and the heat pump unit are connected in parallel and connected between the second return water pipeline and the second water supply pipeline. Connecting pipes are connected between the second return water pipeline and the return water pipeline, and between the second water supply pipeline and the water supply pipeline, and a switch valve five is provided on the connecting pipes.

[0016] Furthermore, it also includes a boiler, the second water supply pipeline is provided with a switch valve three, and the boiler is connected in parallel on both sides of the switch valve three on the second water supply pipeline.

[0017] Furthermore, the second group of heat users is connected to a second return water pipeline and a second water supply pipeline, and the heat exchanger and the heat pump unit are connected in series and connected between the second return water pipeline and the second water supply pipeline. Connecting pipes are connected between the second return water pipeline and the return water pipeline, and between the second water supply pipeline and the water supply pipeline, and a switch valve five is provided on the connecting pipes.

[0018] Furthermore, it also includes a boiler, the second water supply pipeline is provided with a switch valve three, and the boiler is connected in parallel on both sides of the switch valve three on the second water supply pipeline.

[0019] It can be seen from the above technical solution that the heat storage-based heat peak regulation device provided by the present invention has the following beneficial effects:

[0020] By recovering the waste heat in the early cold period for use in the severe cold period, we can not only meet the heating demand, but also avoid the waste of waste heat in the early cold period, reduce the gas consumption in the severe cold period, reduce carbon emissions, and improve the economy of system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a connection diagram of a heat peak-shaving device based on heat storage according to the second embodiment of the present invention;

[0022] Figure 2 This is a connection diagram of a heat storage-based peak-shaving device according to Embodiment 4 of the present invention;

[0023] Figure 3 This is a connection diagram of a heat peak-shaving device based on heat storage according to Embodiment 3 of the present invention;

[0024] Figure 4A connection diagram of a heat supply peak-shaving device based on heat storage according to Embodiment 7 and Embodiment 8 of the present invention;

[0025] Figure 5 This is a connection diagram of a heat peak-shaving device based on heat storage according to Embodiment 9 of the present invention;

[0026] Figure 6 is a schematic diagram of a case where a heat source supplies heat to a first group of heat users and a second group of heat users simultaneously;

[0027] Figure 7 This is a schematic diagram of a heat source supplying heat to a first group of heat users and a peak-shaving heat source supplying heat to a second group of heat users. DETAILED DESCRIPTION

[0028] In order to better understand the purpose, structure and function of the present invention, a heat storage-based heat peak-shaving device of the present invention is further described in detail below.

[0029] First aspect: The present invention provides a heat peak-shaving device based on heat storage, in which when the heat load demand of the heat users is relatively small, such as in the early cold period, the heat source provides heat to the heat users, and the surplus heat is stored in the heat storage body; when the heat load demand of the heat users is relatively large, such as in severe cold weather, the heat stored in the heat storage body and the heat source are used to provide heat to the heat users at the same time, which is described in detail below through several specific embodiments.

[0030] Embodiment 1:

[0031] like Figure 1-3 As shown, a heat peak-shaving device based on heat storage includes a heat source 1, a heat storage body 2, a heat exchanger 3, a heat pump unit 4 and a first group of heat users 6.

[0032] Among them, the heat source 1 is connected to the first group of heat users 6 through a water supply pipeline 9 and a return pipeline 10, and a switch valve 11 is respectively provided on the water supply pipeline 9 and the return pipeline 10. The heat source 1 is used to heat the return water in the return pipeline to hot water, which is convenient for the first group of heat users 6 to use, and the water supply pipeline 9 is connected to the heat storage body 2 through a heat storage water supply pipeline 12, and the return pipeline 10 is connected to the heat storage body 2 through a heat storage return pipeline 13. A switch valve 2 14 is provided on the heat storage water supply pipeline 12 and the heat storage return pipeline 13.

[0033] When the heat load demand of the first group of heat users 6 is less than the heating capacity of the heat source 1, the heat source 1 has surplus heat to supply to the first group of heat users. At this time, the switch valve 11 and the switch valve 2 14 are both in a connected state. Therefore, the first group of heat users 6 enter the heat source 1 through the return water pipeline 10 to be heated. After the heat source 1 heats the incoming return water, a part of the hot water is normally supplied to the first group of heat users 6 through the water supply pipeline 9, and another part of the surplus hot water enters the heat storage body 2 through the heat storage water supply pipeline 12 for storage, so as to be used when the heat load demand of the first group of heat users 6 increases.

[0034] The heat storage body 2, the heat exchanger 3 and the heat pump unit 4 are connected between the heat source 1 and the first group of heat users 6. The heat storage body 2, the heat exchanger 3 and the heat pump unit 4 constitute a peak-shaving heat source. When the heat load demand of the first group of heat users 6 is greater than the heating capacity of the heat source 1, the heat source 1 cannot meet the users' heat demand. Therefore, the heat source 1 and the peak-shaving heat source together provide heat for the first group of heat users 6.

[0035] On the basis of this embodiment, the heat storage body 2 is connected to the heat exchanger 3 through the heat storage body outlet pipe 18, and the heat storage body 2 is connected to the heat pump unit 4 through the heat storage body inlet pipe 19. The heat storage body outlet pipe 18 is provided with a switch valve 4 20. When the switch valve 4 20 is connected, the hot water in the heat storage body 2 enters the heat exchanger 3 and the heat pump unit 4 to release heat and cool down, and the cooled water enters the heat storage body 2 again. The heat generated by the cooling of the hot water in the heat storage body and the heat of the heat source 1 provide heat for the first group of heat users 6.

[0036] In addition, when the switch valve 11 on the water supply pipeline 9 and the return pipeline 10 is disconnected, and the switch valve 2 14 on the heat storage water supply pipeline 12 and the heat storage return pipeline 13 is disconnected, it can be used to preheat the heat storage body using natural heat sources or industrial waste heat in the non-heating season, thereby reducing the cost of storing heat in the heat storage body during the early cold period.

[0037] Embodiment 2:

[0038] On the basis of the first embodiment, in this embodiment, the return water pipeline 10 on both sides of the switch valve 11 is respectively connected to the second return water pipeline 16 and the second water supply pipeline 15, the second return water pipeline 16 is provided with a switch valve 3 17, the heat exchanger 3 and the heat pump unit 4 are connected in parallel between the second return water pipeline 16 and the second water supply pipeline 15, as shown in FIG. Figure 1 shown.

[0039] Therefore, when the heat load demand of the first group of heat users 6 is less than the heating capacity of the heat source 1, the switch valve three 17 and the switch valve four 20 are both in a disconnected state, and the switch valve one 11 and the switch valve two 14 are in a connected state. At this time, part of the hot water in the heat source 1 is normally supplied to the first group of heat users 6, and the other part of the hot water enters the heat storage body 2 through the heat storage water supply pipeline 12 and is stored.

[0040] When the heat load demand of the first group of heat users 6 is greater than the heating capacity of the heat source 1, the heat source 1 alone cannot meet the heat load demand of the first group of heat users 6. At this time, the switch valve 11 on the return water pipeline 10 is disconnected, and the other switch valve 11, the switch valve 2 14 and the switch valve 3 17 are in a connected state. Therefore, the return water generated by the first group of heat users 6 enters the second return water pipeline 16 through the return water pipeline 10, and is divided into two paths after entering the second return water pipeline 16, one of which enters the heat receiving side of the heat pump unit 4 to absorb heat and heat up, and the other enters the heat receiving side of the heat exchanger 3 to absorb heat and heat up. The heated water in the two paths enters the heat source 1 through the second water supply pipeline 15 for heating and then is supplied to the first group of heat users 6. At this time, the heat absorbed by the two return waters through the heat exchanger 3 and the heat pump unit 4 all comes from the heat storage body 2. After the switch valve 20 is adjusted to the connected state, the hot water in the heat storage body first enters the heat release side of the heat exchanger 3 for cooling, and then enters the heat release side of the heat pump unit 4 for cooling again. The cooled low-temperature water returns to the heat storage body, and the heat generated by the cooling of the hot water is absorbed by the return water.

[0041] In this embodiment, when the heat load demand of the first group of heat users 6 is greater than the heating capacity of the heat source 1, the return water of the first group of heat users 6 is heated in parallel through the heat exchanger 3 and the heat pump unit 4 and then heated again through the heat source 1, thereby meeting the larger heat load demand of the first group of heat users 6.

[0042] Embodiment three:

[0043] On the basis of the first embodiment, the return water pipeline 10 on both sides of the switch valve 11 in this embodiment is respectively connected to the second return water pipeline 16 and the second water supply pipeline 15, the second return water pipeline 16 is provided with a switch valve 3 17, and the heat exchanger 3 and the heat pump unit 4 are connected in series between the second return water pipeline 16 and the second water supply pipeline 15, as shown in FIG. Figure 3 shown.

[0044] Therefore, in this embodiment, the return water on the second return water pipeline 16 first enters the heat receiving side of the heat pump unit 4 to absorb heat and heat up, and then enters the heat receiving side of the heat exchanger 3 to absorb heat and heat up. The heated water enters the heat source 1 again to be heated and then supplied to the first group of heat users 6.

[0045] Therefore, when the heat load demand of the first group of heat users 6 is less than the heating capacity of the heat source 1 , the heat source 1 supplies hot water to the first group of heat users 6 and the heat storage body 2 , as in the first embodiment.

[0046] When the heat load demand of the first group of heat users 6 is greater than the heating capacity of the heat source 1, the switch valve 11 on the return water pipeline 10 is disconnected, and the other switch valves are in the connected state. At this time, the return water of the first group of heat users 6 enters the second return water pipeline 16. The return water entering the second return water pipeline 16 first enters the heat-absorbing side of the heat pump unit 4 to absorb heat and heat up, and then enters the heat-absorbing side of the heat exchanger 3 to absorb heat and heat up again. The heated water enters the heat source 1 again for heating and then supplies the first group of heat users 6. At this time, the heat that needs to be absorbed by the two return waters separated after entering the second return water pipeline 16 comes from the heat storage body 2. Specifically, after the switch valve 4 20 is adjusted to the connected state, the hot water of the heat storage body first enters the heat-releasing side of the heat exchanger 3 to cool down, and then enters the heat-releasing side of the heat pump unit 4 to cool down again. The low-temperature water after cooling returns to the heat storage body, and the heat generated by the cooling of the hot water is absorbed by the return water.

[0047] Embodiment 4:

[0048] On the basis of the first embodiment, in this embodiment, the return water pipeline 10 on the right side of the switch valve 11 is connected to the second return water pipeline 16, the water supply pipeline 11 is connected to the second water supply pipeline 15, and the heat exchanger 3 and the heat pump unit 4 are connected in parallel between the second return water pipeline 16 and the second water supply pipeline 15. Figure 2 shown.

[0049] Therefore, when the heat load demand of the first group of heat users 6 is less than the heating capacity of the heat source 1 , the heat source 1 supplies hot water to the first group of heat users 6 and the heat storage body 2 , as in the first embodiment.

[0050] When the heat load demand of the first group of heat users 6 is greater than the heating capacity of the heat source 1, the switch valve 1 11, the switch valve 2 14 and the switch valve 3 17 are all in a connected state, so the return water generated by the first group of heat users 6 is divided into two parts, one part enters the heat source 1 through the return water pipe 10, is heated by the heat source 1, and is supplied to the first group of heat users 6; the other part enters the second return water pipe 16 through the return water pipe 10, and is divided into two paths after entering the second return water pipe 16, one of which enters the heat receiving side of the heat pump unit 4 to absorb heat and heat up, and the other enters the heat receiving side of the heat exchanger 3 to absorb heat and heat up, and the heated water of the two paths is mixed and enters the water supply pipe and the hot water in the heat source 1 to be supplied to the first group of heat users 6 together. At this time, the heat that needs to be absorbed by the two return water paths separated after entering the second return water pipeline 16 all comes from the heat storage body 2. Specifically, after the switch valve 20 is adjusted to the connected state, the hot water of the heat storage body first enters the heat release side of the heat exchanger 3 for cooling, and then enters the heat release side of the heat pump unit 4 for cooling again. The cooled low-temperature water returns to the heat storage body, and the heat generated by the cooling of the hot water is absorbed by the return water.

[0051] Embodiment five:

[0052] Based on the fourth embodiment, this embodiment also includes a boiler, such as Figure 2As shown, a switch valve 3 17 is provided on the second water supply pipeline 15 , and the boiler 5 is connected in parallel to both sides of the switch valve 3 17 on the second water supply pipeline 15 .

[0053] In this embodiment, when the switch valve three 17 on the second water supply pipeline 15 is in the disconnected state, the output water of the heat exchanger 3 and the heat pump unit 4 is mixed and enters the boiler 5 together, and is heated again by the boiler 5. The heated hot water enters the water supply pipeline and is supplied to the first group of heat users 6 together with the hot water in the heat source 1.

[0054] Second aspect: The present invention also provides a heat peak-shaving device based on heat storage, when the heat load demand of the heat users is small, such as in the early cold period, the heat source 1 provides heat to the heat users, and the surplus heat is stored in the heat storage body; when the heat load demand of the heat users is large, such as in the severe cold period, the heat source 1 provides heat to one group of heat users, and at the same time, the heat stored in the heat storage body is used to provide heat to another group of heat users. The following is a detailed description through several specific embodiments.

[0055] Embodiment six:

[0056] like Figure 4-5 As shown, a heat peak-shaving device based on heat storage includes a heat source 1, a heat storage body 2, a heat exchanger 3, a heat pump unit 4, a first group of heat users 6 and a second group of heat users 6b, wherein the heat storage body 2, the heat exchanger 3 and the heat pump unit 4 constitute a peak-shaving heat source, the heat source 1 is connected to the first group of heat users 6 through a water supply pipeline 9 and a return water pipeline 10, and the water supply pipeline 9 is connected to the heat storage body 2 through a heat storage water supply pipeline 12, and the return water pipeline 10 is connected to the heat storage body 2 through a heat storage return water pipeline 13, and the heat storage water supply pipeline A switch valve 14 is provided on the heat storage pipe 12 and the heat storage return pipe 13; and the heat storage body, the heat exchanger and the heat pump unit are connected between the heat source and the second group of heat users. When the total heat demand of the first group of heat users and the second group of heat users is less than the heating capacity of the heat source, the heat source provides heat to the heat storage body, the first group of heat users and the second group of heat users. When the total heat demand of the first group of heat users and the second group of heat users is greater than the heating capacity of the heat source, the heat source provides heat to the first group of heat users, and the peak-shaving heat source provides heat to the second group of heat users.

[0057] Specifically, the heat storage body 2 and the heat exchanger 3 are connected via a heat storage body water outlet pipe 18, and the heat storage body 2 and the heat pump unit 4 are connected via a heat storage body water inlet pipe 19, and a switch valve four 20 is provided on the heat storage body water outlet pipe 18. When the switch valve four 20 is connected, the hot water in the heat storage body 2 enters the heat exchanger 3 and the heat pump unit 4 to release heat and cool down, and the cooled water enters the heat storage body again.

[0058] In addition, when the switch valve 11 on the water supply pipeline 9 and the return pipeline 10 is disconnected, and the switch valve 2 14 on the heat storage water supply pipeline 12 and the heat storage return pipeline 13 is disconnected, it can be used to preheat the heat storage body using natural heat sources or industrial waste heat in the non-heating season, thereby reducing the cost of storing heat in the heat storage body during the early cold period.

[0059] Embodiment seven:

[0060] Based on Example 6, Figure 4 As shown, in this embodiment, the second group of heat users is connected to the second return water pipeline 16 and the second water supply pipeline 15, and the heat exchanger 3 and the heat pump unit 4 are connected in parallel and connected between the second return water pipeline 16 and the second water supply pipeline 15, between the second return water pipeline 16 and the return water pipeline 10, and between the second water supply pipeline 15 and the water supply pipeline 9. A connecting pipe 21 is connected, and a switch valve 5 22 is provided on the connecting pipe 21.

[0061] When the total heat load demand of the first group of heat users 6 and the second group of heat users 6b is less than the heating capacity of the heat source 1, the heat source 1 provides heat to the first group of heat users 6 and the second group of heat users 6b, and stores the excess heat in the heat storage body, such as Figure 6 As shown, the return water temperature of the first group of heat users 6 and the second group of heat users 6b are both 35°C, so the low-temperature water of 35°C enters the heat source 1 and is heated by the heat source 1. The temperature of the hot water after heating is 90°C, and the hot water is supplied to the first group of heat users 6 and the second group of heat users 6b at the same time.

[0062] When the total heat load demand of the first group of heat users 6 and the second group of heat users 6b is greater than the heating capacity of the heat source 1, the switch valve five 22 is disconnected and the switch valve three 17 is connected. At this time, the return water of the first group of heat users can only enter the heat source 1, and is heated by the heat source 1 and then supplied to the first group of heat users 6 for use; the return water of the second group of heat users 6b enters the second return water pipeline 16, and the return water entering the second return water pipeline 16 is divided into two paths, one path is heated by the heat exchanger 3, and the other path is heated by the heat pump unit 4. The two paths of heated hot water enter the second water supply pipeline 15 together and are supplied to the second group of heat users 6b through the second water supply pipeline 15.

[0063] The energy required for heating the other two return waters comes from the heat storage body. Specifically, when the switch valve 4 20 is connected, the hot water in the heat storage body enters the heat release side of the heat exchanger 3 to release heat and cool down, and then enters the heat release side of the heat pump unit 4 again to release heat and cool down. The return water after cooling enters the heat storage body again.

[0064] Embodiment eight:

[0065] On the basis of the seventh embodiment, this embodiment further includes a boiler 5, such as Figure 4As shown, a switch valve 3 17 is provided on the second water supply pipeline 15 , and the boiler is connected in parallel on both sides of the switch valve 3 17 on the second water supply pipeline 15 .

[0066] In this embodiment, the boiler 5 is used to reheat the hot water that has been heated in the second water supply pipeline 15. At this time, the switch valve 3 17 is disconnected, and the hot water enters the boiler 5 and is heated again.

[0067] In the specific implementation, Figure 7 As shown, the return water temperature of the first group of heat users 6 and the second group of heat users 6b are both 50°C. The return water of the first group of heat users 6 enters the heat source 1 and is heated by the heat source 1. The temperature of the heated hot water is 120°C and is supplied to the first group of heat users; when the heat exchanger 3 and the heat pump unit 4 are connected in parallel, the return water of the second group of heat users 6b is respectively added to the heat exchanger 3 and the heat pump unit 4 to be heated. The temperature of the two waters mixed together after being heated is 70°C, and then heated to 120°C by the boiler 5 and supplied to the second group of heat users 6b; the hot water at 70°C in the heat storage body 2 enters the heat exchanger 3 and the heat pump unit 4 in turn to release heat to become ice slurry, and then returns to the heat storage body again.

[0068] Embodiment nine:

[0069] On the basis of Example 6, in this embodiment, Figure 5 As shown, the second group of heat users is connected to the second return water pipeline and the second water supply pipeline, and the heat exchanger and the heat pump unit are connected in series and connected between the second return water pipeline and the second water supply pipeline, between the second return water pipeline 16 and the return water pipeline 10, and between the second water supply pipeline 15 and the water supply pipeline 9. A connecting pipe 21 is connected, and a switch valve 22 is provided on the connecting pipe 21.

[0070] In this embodiment, when the total heat load demand of the first group of heat users 6 and the second group of heat users 6b is greater than the heating capacity of the heat source 1, the switch valve five 22 is disconnected and the switch valve three 17 is connected. At this time, the return water of the first group of heat users can only enter the heat source 1, and is heated by the heat source 1 and then supplied to the first group of heat users 6 for use again; the return water of the second group of heat users 6b enters the second return water pipeline 16, and the return water entering the second return water pipeline 16 is heated by the heat pump unit 4 and the heat exchanger 3 in turn and then supplied to the second group of heat users 6b.

[0071] Embodiment ten:

[0072] On the basis of the ninth embodiment, in this embodiment, Figure 5 As shown, the boiler 5 is also included, and the second water supply pipeline 15 is provided with a switch valve 3 17, and the boiler is connected in parallel on both sides of the switch valve 3 17 on the second water supply pipeline 15. In this embodiment, the boiler 5 is used to reheat the already heated hot water in the second water supply pipeline 15. At this time, the switch valve 3 17 is disconnected, and the hot water enters the boiler 5 and is heated again.

[0073] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A heat peak-shaving device based on heat storage, characterized in that: It includes a heat source, a heat storage body, a heat exchanger, a heat pump unit, a first group of heat users and a second group of heat users, wherein the heat source is connected to the first group of heat users via a water supply pipeline and a water return pipeline, and the water supply pipeline is connected to the heat storage body via a heat storage water supply pipeline, and the water return pipeline is connected to the heat storage body via a heat storage water return pipeline, and the heat storage water supply pipeline and the heat storage water return pipeline are both provided with a second switch valve; The heat storage body, heat exchanger and heat pump unit are connected between the heat source and the second group of heat users. When the total heat demand of the first group of heat users and the second group of heat users is less than the heating capacity of the heat source, the heat source provides heat to the heat storage body, the first group of heat users and the second group of heat users. When the total heat demand of the first group of heat users and the second group of heat users is greater than the heating capacity of the heat source, the heat source provides heat to the first group of heat users, and the heat storage body, heat exchanger and heat pump unit provide heat to the second group of heat users.

2. A heat peak-shaving device based on heat storage according to claim 1, characterized in that: The heat storage body and the heat exchanger are connected via a heat storage body water outlet pipe, the heat storage body and the heat pump unit are connected via a heat storage body water inlet pipe, and a switch valve four is provided on the heat storage body water outlet pipe. When the switch valve four is connected, the hot water in the heat storage body enters the heat exchanger and the heat pump unit to release heat and cool down, and the cooled water enters the heat storage body again.

3. A heat peak-shaving device based on heat storage according to claim 2, characterized in that: The second group of heat users is connected to the second return water pipeline and the second water supply pipeline, and the heat exchanger and the heat pump unit are connected in parallel and connected between the second return water pipeline and the second water supply pipeline. Connecting pipes are connected between the second return water pipeline and the return water pipeline, and between the second water supply pipeline and the water supply pipeline, and a switch valve five is provided on the connecting pipes.

4. A heat peak-shaving device based on heat storage according to claim 3, characterized in that: It also includes a boiler. The second water supply pipeline is provided with a switch valve three, and the boiler is connected in parallel on both sides of the switch valve three on the second water supply pipeline.

5. The heat storage-based heat peak regulation device according to claim 2, characterized in that: The second group of heat users is connected to the second return water pipeline and the second water supply pipeline, and the heat exchanger and the heat pump unit are connected in series and connected between the second return water pipeline and the second water supply pipeline. Connecting pipes are connected between the second return water pipeline and the return water pipeline, and between the second water supply pipeline and the water supply pipeline, and a switch valve five is provided on the connecting pipes.

6. A heat peak-shaving device based on heat storage according to claim 5, characterized in that: It also includes a boiler. The second water supply pipeline is provided with a switch valve three, and the boiler is connected in parallel on both sides of the switch valve three on the second water supply pipeline.

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