Energy storage type energy-saving heating system for public places

Abstract

The utility model discloses an energy storage type energy-saving heating system for public places, which is used for heating a heating area I and a heating area II, a heating radiator I is mounted in the heating area I, a heating radiator II is mounted in the heating area II, the heating radiator I is respectively connected with a heating water inlet and a heating water return port, and the heating radiator II is respectively connected with a heating water outlet. A valve I is arranged on a pipeline from the heating water inlet to the heating radiator I; the energy storage device is respectively connected with the heating water inlet, the heating water return port and the heating radiator II, and a valve I is arranged on a pipeline from the heating water inlet to the energy storage device. The solar heating device can be applied to some public places, such as office buildings, teaching buildings, libraries and the like, which are only opened in the daytime, or some public places, which are only opened at night and are heated for 24 hours, when nobody is in the places, heat energy of a certain heating area is stored, and when someone is in the places, the heat energy is used for heating another heating area; a large amount of energy is saved, and the operation cost is saved for users.

Description

Technical Field

[0001] The utility model belongs to the technical field of building heating and ventilation, and specifically relates to an energy storage type energy-saving heating system for public places. Background Art

[0002] Many public places, such as office buildings, teaching buildings, libraries, etc., are only open during the day, and some public places are only used at night. However, all these places need 24-hour heating in winter, which causes these places to consume a lot of heat energy when no one is there, causing great waste. This technology stores the heating heat energy when no one is there, and releases it when someone is there, saving a lot of energy.

[0003] In recent years, heating in northern my country is mostly centralized and charged by area. With the reduction in resource supply and the rise in prices, as well as the marketization of heating companies and the difficulty in paying heating fees, there is huge resistance to the progress of heating reform and building energy conservation.

[0004] Public places include office buildings, shopping malls, financial institutions, hotels, schools, medical and health care, airports, stations and other buildings that provide places for various public activities. For a long time, there have been many problems with heating, such as: difficult to charge, aging facilities, high energy consumption, large waste, serious environmental pollution, etc., which have affected the healthy development of urban heating. The heating of public buildings is different from that of residential buildings. The heating of public buildings is related to the time of people's public activities. Many public buildings only need 8 hours of heating, and some are closely related to holidays. At present, the heating of many public buildings is charged according to the building area of ​​public places, whether going to work, getting off work or on holidays. In winter, it is basically 24 hours a day, resulting in these places consuming a lot of heat energy when no one is there, causing great energy waste. Of course, in order to save energy, some public buildings manually close the heating valves and equipment when heating is not needed. Although this can achieve certain energy-saving effects, manual adjustment is troublesome and time-consuming, and it is also closely related to the sense of responsibility of the operator. Summary of the invention

[0005] In order to solve the above technical problems, the utility model proposes an energy storage type energy-saving heating system for public places. In some public places, such as office buildings, teaching buildings, libraries, etc., which are only open during the day, or some public places are only open at night but provide 24-hour heating, when there is no one in the above places, the heating heat energy of a certain heating area is stored, and when there are people, it is used for heating another heating area, which saves a lot of energy and saves operating costs for users.

[0006] The technical solution provided by the utility model is as follows:

[0007] A storage energy-saving heating system for public places is used for heating heating area I and heating area II. A heating radiator I is installed in heating area I, and a heating radiator II is installed in heating area II. Heating radiator I is connected to a heating water inlet and a heating return water inlet, respectively, and a valve I is arranged on the pipeline from the heating water inlet to heating radiator I; and also includes a set of energy storage devices, which are respectively connected to the heating water inlet, the heating return water inlet and the heating radiator II, and a valve I is arranged on the pipeline from the heating water inlet to the energy storage device.

[0008] Preferably, the energy storage device includes a heat recovery device and an energy storage water tank. The heat recovery device is respectively connected to the heating water inlet, the heating water return port, the energy storage water tank water inlet, and the energy storage water tank outlet. A water pump and a valve II are provided on the connecting pipeline between the heat recovery device and the energy storage water tank outlet. The energy storage water tank is connected to the heating radiator II to form a closed-loop pipeline. A water pump and a valve II are provided on the pipeline from the energy storage water tank to the heating radiator II.

[0009] More preferably, the heat recovery equipment is a water source heat pump I.

[0010] More preferably, the heat recovery device is a water-water heat exchanger.

[0011] .More preferably, it also includes a water source heat pump II, which is located between the water storage water tank and the heating radiator II. The water pump and valve II are arranged on the pipeline from the water source heat pump II to the energy storage water tank, and a water pump is arranged on the pipeline from the water source heat pump II to the heating radiator II.

[0012] Preferably, the energy storage device includes a water source heat pump III and an energy storage water tank, valve I is arranged on the pipeline connecting the water inlet of the energy storage water tank and the heating water inlet, a valve water pump and valve II are arranged on the pipeline connecting the water outlet of the energy storage water tank and the heating return water outlet, the water source heat pump III is respectively connected to the energy storage water tank and the heating radiator II, a water pump and valve II are arranged on the pipeline from the energy storage water tank to the water source heat pump III, and a water pump is arranged on the pipeline from the water source heat pump III to the heating radiator II.

[0013] Preferably, the energy storage device includes an air source heat pump, an energy storage water tank and a low-temperature water tank, valve I is arranged on the pipeline connecting the water inlet of the energy storage water tank and the heating water inlet, the air source heat pump is connected to the energy storage water tank, and a water pump is arranged on the pipeline from the energy storage water tank to the air source heat pump; the heating radiator II is respectively connected to the energy storage water tank and the low-temperature water tank, a water pump and valve II are arranged on the pipeline from the energy storage water tank to the heating radiator II, the low-temperature water tank is connected to the heating return water port, and a water pump and valve II are arranged on the connecting pipeline between the two.

[0014] More preferably, valve I is an electric valve.

[0015] More preferably, valve II is an electric regulating valve.

[0016] Compared with the prior art, the utility model has the following technical advantages:

[0017] (1) The utility model stores heat energy when no one is in the heating area by setting up an energy storage device. The heat energy is stored in the form of hot water in the energy storage tank, and the stored heat energy is used for heating another heating area. The utility model is particularly suitable for public buildings such as schools and office buildings in northern regions, because the heating charges in northern regions are based on the applicable building area of ​​the heating, and the above places are only open during the daytime. At night, no one uses them. The heating system disclosed in the utility model is used to store the heat energy of one of the heating areas at night, and then use it for heating another heating area during the daytime of the next day. Similarly, the utility model is also suitable for some buildings that are unmanned during the day and are used at night, that is, the heat energy of one of the heating areas during the day is stored and then used for heating another heating area at night. The utility model adds an insulated water tank and a heat exchanger to the existing heating device, which makes full use of thermal energy and saves energy while reducing the heating cost for users by nearly half. The automatic switching of the system's energy storage and heating modes can be achieved through the setting of electric regulating valves and electric valves. The whole system has a simple structure and can be operated without the need for professional personnel, and has strong popularization applicability.

[0018] (2) The utility model has a good return on investment, but more importantly, it stores and reuses the heating heat energy that is wasted when no one is in the public place, thereby reducing the overall heating load. At the same time, it also maintains the stability of the return water flow and return water temperature for 24 hours, creating conditions for the stable operation of the heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the principle structure diagram of the heating system in Example 1 of the utility model

[0020] Figure 2 This is the principle structure diagram of the heating system in Example 2 of the utility model

[0021] Figure 3 This is the principle structure diagram of the heating system in Example 3 of the utility model

[0022] Figure 4 This is the principle structure diagram of the heating system in Example 4 of the utility model

[0023] Among them: 1. Heating area I 2. Heating area II 3. Heating radiator I 4. Heating radiator II 5. Water source heat pump I 6. Water source heat pump II 7. Electric valve I 8. Electric valve II 9. Electric regulating valve I 10. Electric regulating valve II 11. Water pump I 12. Water pump II 13. Water pump III 14. Water-water heat exchanger 15. Low-temperature water tank 16. Air source heat pump 17. Heating water inlet 18. Heating return water inlet 19. Energy storage water tank. Implementation

[0024] The utility model is now further described in conjunction with the accompanying drawings.

[0025] The heating system disclosed in the utility model can be used for heating two heating areas at the same time. Heating radiators are respectively installed in the two heating areas. Two electric valves are installed at the heating water inlet to control whether the hot water at the heating water inlet flows to the heating radiator I or to the energy storage device. The heating in the heating area I is a conventional heating method. After the hot water enters the heating radiator I to dissipate heat, it returns to the heating return water inlet. The heating in the heating area II comes from the energy storage device. The hot water in the energy storage device enters the heating radiator II to dissipate heat. The hot water after heat exchange returns to the heating return water inlet through the energy storage device. Example 1

[0026] like Figure 1 As shown, the utility model discloses an energy storage type energy-saving heating system for public places, which is used for heating heating area Ⅰ 1 and heating area Ⅱ 2. A heating radiator Ⅰ 3 is installed in the heating area Ⅰ 1, and a heating radiator Ⅱ 4 is installed in the heating area Ⅱ 2. The heating radiator Ⅰ 3 is connected to the heating water inlet 17 and the heating water return port 18 respectively, and an electric valve Ⅰ 7 is arranged on the pipeline from the heating water inlet 17 to the heating radiator Ⅰ 3; the energy storage device is mainly composed of a water source heat pump Ⅰ 5 and an energy storage water tank 19. The evaporator in the water source heat pump Ⅰ 5 is connected to the heating water inlet 17 and the heating water return port 18 respectively, and the electric valve Ⅱ 8 is arranged on the pipeline between the heating water inlet 17 and the water source heat pump Ⅰ 5. The condenser in the water source heat pump Ⅰ 5 is connected to the water inlet and the water outlet of the energy storage water tank 19 respectively. The heating radiator Ⅱ 4 is connected to the energy storage water tank 19 to form a closed-loop water circuit. A water pump Ⅰ 11 and an electric regulating valve Ⅰ 9 are provided on the pipeline from the energy storage water tank 19 to the water source heat pump Ⅰ 5. A water pump Ⅱ 12 and an electric regulating valve Ⅱ 10 are also provided on the pipeline from the energy storage water tank 19 to the heating radiator Ⅱ 4.

[0027] This embodiment mainly has four working modes, as follows:

[0028] Working mode 1: Normal heating mode

[0029] When there are people during the day, open the electric valve Ⅰ 7 (30 minutes to 1 hour in advance), close the electric valve Ⅱ 8, and the heating water flows out from the heating water inlet 17 through the heating radiator Ⅰ 3, heats the heating area Ⅰ 1, and then returns to the heating return water inlet 18.

[0030] Working mode 2: Energy storage mode

[0031] When no one is at night, close electric valve Ⅰ 7, open electric valve Ⅱ 8, start water source heat pump Ⅰ 5 and water pump Ⅰ 11, and adjust electric regulating valve Ⅰ 9 (or the electronic expansion valve of the water source heat pump) so that the outlet water temperature of the evaporator of the water source heat pump Ⅰ 5 reaches the set value t1 and then flows to the heating return port 18. The water source heat pump Ⅰ 5 works until the water temperature in the energy storage tank 19 reaches the set value t2.

[0032] (t1 and t2 are adjusted according to the actual heating parameters. For radiators used as heating radiators, assuming the heating water temperature is 55°C and the supply and return water temperature difference is 15°C, then t1 is 40°C and t2 is above 75°C. For floor heating coils used as heating radiators, assuming the heating inlet water temperature is 35°C and the supply and return water temperature difference is 5°C, then t1 is 30°C and t2 is above 40°C.).

[0033] Working mode 3: Release mode

[0034] When there are people during the day, turn on the water pump Ⅱ 12 and the electric regulating valve Ⅱ 10 (30 minutes to 1 hour in advance), and the hot water in the energy storage tank 19 passes through the heating radiator Ⅱ 4 to heat the heating area Ⅱ 2. The opening of the electric regulating valve Ⅱ 10 is adjusted using a thermostat (the temperature probe is installed in the heating area Ⅱ 2) to keep the heating area Ⅱ 2 at a constant temperature.

[0035] Working mode 4: Keep warm mode

[0036] At night when no one is there, when the temperature in heating area Ⅰ 1 is lower than 6℃~8℃, open electric valve Ⅰ 7 to carry out insulation circulation in heating area Ⅰ 1; when the temperature in heating area Ⅰ 1 reaches 10℃~12℃, close electric valve Ⅰ 7; when the temperature in heating area Ⅱ 2 is lower than 6℃~8℃, turn on water pump Ⅱ 12 and electric regulating valve Ⅱ 10 to carry out insulation circulation in heating area Ⅱ 2; when the temperature in heating area Ⅱ 2 reaches 10℃~12℃, close water pump Ⅱ 12 and electric valve Ⅱ 8.

[0037] It should be noted that in order to maximize cost savings, the heat pump mainly works at night to make full use of valley electricity. Example 2

[0038] like Figure 2As shown, the utility model discloses an energy storage type energy-saving heating system for public places, which is used for heating heating area Ⅰ 1 and heating area Ⅱ 2. A heating radiator Ⅰ 3 is installed in the heating area Ⅰ, and a heating radiator Ⅱ 4 is installed in the heating area Ⅱ 2. The heating radiator Ⅰ 3 is connected to the heating water inlet 17 and the heating water return port 18 respectively, and an electric valve Ⅰ 7 is arranged on the pipeline from the heating water inlet 17 to the heating radiator Ⅰ 3; the energy storage device is mainly composed of a water-water heat exchanger 14, a water source heat pump Ⅱ 6 and an energy storage water tank 19. The water-water heat exchanger 14 is connected to the heating water inlet 17 and the heating water return port 18 respectively, and an electric valve Ⅱ 7 is arranged on the pipeline between the heating water inlet 17 and the water-water heat exchanger 14 8, the water-water heat exchanger 14 is also connected to the energy storage water tank 19 and heats the water in the energy storage water tank 19. A water pump Ⅰ 11 and an electric regulating valve Ⅰ 9 are provided on the pipeline from the energy storage water tank 19 to the water-water heat exchanger 14. The energy storage water tank 19 is also connected to the water source heat pump Ⅱ 6. A water pump Ⅱ 12 and an electric regulating valve Ⅱ 10 are also provided on the pipeline from the evaporator in the water source heat pump Ⅱ 6 to the energy storage water tank 19. The condenser in the water source heat pump Ⅱ 6 is connected to the heating radiator Ⅱ 4 to form a closed loop water circuit. A water pump Ⅲ 13 is provided on the pipeline from the condenser of the water source heat pump Ⅱ 6 to the heating radiator Ⅱ 4.

[0039] This embodiment mainly has four working modes, as follows:

[0040] Working mode 1: Normal heating mode

[0041] When there are people during the day, open the electric valve Ⅰ 7 (30 minutes to 1 hour in advance), close the electric valve Ⅱ 8, and the heating water flows out from the heating water inlet 17 through the heating radiator Ⅰ 3, heats the heating area Ⅰ 1, and then returns to the heating return water inlet 18.

[0042] Working mode 2: Energy storage mode

[0043] When no one is around during the day, close electric valve I 7, open electric valve II 8, start water pump I 11, and adjust electric regulating valve I 9 so that the return water temperature of the heating hot water after heat exchange in the water-to-water heat exchanger 14 reaches the set value t1 and then flows to the heating return water outlet.

[0044] (t1 is adjusted according to the actual heating parameters. For radiators, assuming the heating water inlet temperature is 55°C and the supply and return water temperature difference is 15°C, t1 is 40°C. For floor heating coils, assuming the heating water inlet temperature is 35°C and the supply and return water temperature difference is 5°C, t1 is 30°C.)

[0045] Working mode 3: Release mode

[0046] When there are people at night, turn on water pump II 12, electric regulating valve II 10, water pump III 13, and water source heat pump II 6 (30 minutes to 1 hour in advance). The evaporator of water source heat pump II 6 absorbs heat from the energy storage tank 19, and the condenser of water source heat pump II 6 circulates with heating radiator II 4 to heat heating area II 2. When the temperature of heating area II 2 is lower than the set value (such as 15℃~18℃), the system starts water source heat pump II 6 to heat heating area II 2. When the temperature of heating area II 2 exceeds the set value (such as 19℃~20℃), the system stops the water source heat pump II 6.

[0047] Working mode 4: Keep warm mode

[0048] When there is no one during the day, when the temperature in heating area Ⅰ 1 is lower than 6℃~8℃, open electric valve Ⅰ 7 to carry out insulation circulation in heating area Ⅰ 1; when the temperature in heating area Ⅰ 1 reaches 10℃~12℃, close electric valve Ⅰ 7; when the temperature in heating area Ⅱ2 is lower than 6℃~8℃, turn on water pump Ⅱ 12, electric regulating valve Ⅱ 10, water pump Ⅲ 13 and water source heat pump Ⅱ 6 to keep heating area Ⅱ 2 warm; when the temperature in heating area Ⅱ 2 reaches 10℃~12℃, turn off water pump Ⅱ 12, electric regulating valve Ⅱ 10, water pump Ⅲ 13 and water source heat pump Ⅱ 6.

[0049] It should be noted that: (1) In order to maximize cost savings, the heat pump mainly operates at night to make full use of valley electricity.

[0050] (2) In this embodiment, in order to save costs, the water-water heat exchanger 14 may also be eliminated. Figure 3 As shown, the heating water is connected to the water inlet of the energy storage water tank 19 after passing through the electric valve II 8, the water outlet of the energy storage water tank 19 is connected to the heating return water port 18, and a water pump I 11 and an electric regulating valve I 9 are arranged on the pipeline from the energy storage water tank 19 to the heating return water port 18. In terms of working modes, only the energy storage mode is different, and other modes are the same.

[0051] (3) After removing the water-water heat exchanger 14, the energy storage mode is as follows: the electric valve II 8 is opened, and the heating water directly enters the energy storage tank 19 for storage. While the heating water is being stored, the water pump I 11 is turned on, and the electric regulating valve I 9 is adjusted so that the flow rate entering the energy storage tank 19 and the flow rate from the water pump I 11 to the heating return water port 18 are equal. Example 3

[0052] like Figure 4As shown, the utility model discloses an energy storage type energy-saving heating system for public places, which is used for heating heating area Ⅰ 1 and heating area Ⅱ 2. A heating radiator Ⅰ 3 is installed in the heating area Ⅰ 1, and a heating radiator Ⅱ 2 is installed in the heating area Ⅱ 2. The heating radiator Ⅰ 3 is connected to the heating water inlet 17 and the heating water return port 18 respectively, and an electric valve Ⅰ 7 is arranged on the pipeline from the heating water inlet 17 to the heating radiator Ⅰ 3; the energy storage device is mainly composed of an air source heat pump 16, an energy storage water tank 19 and a low-temperature water tank 15, and the electric valve Ⅱ 8 is arranged on the pipeline connecting the water inlet of the energy storage water tank 19 and the heating water inlet 17. The air source heat pump 16 is connected to the energy storage water tank 19, and a water pump Ⅲ 13 is arranged on the pipeline from the energy storage water tank 19 to the air source heat pump 16; the heating radiator Ⅱ 4 are connected to the energy storage water tank 19 and the low-temperature water tank 15 respectively. The pipeline from the energy storage water tank 19 to the heating radiator II 2 is provided with a water pump I 11 and an electric regulating valve I 9. The low-temperature water tank 15 is connected to the heating return water port 18. The connecting pipelines of the two are provided with a water pump II 12 and an electric regulating valve II 10.

[0053] This embodiment mainly has five working modes, as follows:

[0054] Working mode 1: Normal heating mode

[0055] When there are people in heating area Ⅰ 1 and heating area Ⅱ 2, open electric valve Ⅰ 7 (30 minutes to 1 hour in advance), close electric valve Ⅱ 8, and heating water flows out from heating water inlet 17 through heating radiator Ⅰ 3, heats heating area Ⅰ 1, and then returns to heating return water inlet 18.

[0056] Working mode 2: Energy storage mode

[0057] When there is no one in heating area Ⅰ 1 and heating area Ⅱ 2, close electric valve Ⅰ 7, open electric valve Ⅱ 8, and the heating water enters the energy storage tank 19 for storage. At the same time, turn on water pump Ⅱ 12, and the water in the low-temperature water tank 15 returns to the heating return water port 18 as heating return water. By adjusting electric regulating valve Ⅱ 10, the flow rate of heating water flowing into the energy storage tank 19 is roughly equal to the flow rate of heating water returning from the low-temperature water tank 15 to the heating pipe.

[0058] Working mode 3: Release mode

[0059] When there are people in heating area Ⅰ 1 and heating area Ⅱ 2, turn on water pump Ⅰ 11 and electric regulating valve Ⅰ 9 (30 minutes to 1 hour in advance), and the hot water in the energy storage tank 19 heats the heating area Ⅱ 2 through the heating radiator Ⅱ 4. The low-temperature water after heat dissipation by the heating radiator Ⅱ 4 enters the low-temperature water tank 15 for storage.

[0060] Working mode 4: Keep warm mode

[0061] When there is no one in heating area Ⅰ 1 and heating area Ⅱ 2, when the temperature of heating area Ⅰ 1 is lower than 6℃~8℃, open electric valve Ⅰ 7 to carry out insulation circulation of heating area Ⅰ 1; when the temperature of heating area Ⅰ 1 reaches 10℃~12℃, close electric valve Ⅰ 7; when the temperature of heating area Ⅱ 2 is lower than 6℃~8℃, turn on water pump Ⅰ 11 and electric regulating valve Ⅰ 9 to keep heating area Ⅱ 2 warm; when the temperature of heating area Ⅱ 2 reaches 10℃~12℃, close water pump Ⅰ 11 and electric regulating valve Ⅰ 9.

[0062] .Working mode 5: Energy replenishment mode

[0063] When the water temperature of the energy storage water tank 19 is lower than the set value t1 (lower limit) due to various reasons such as heat loss, the air source heat pump 16 is started, and the circulating water pump III 13 is turned on to supplement the heating of the energy storage water tank 19 until the set value t2 (upper limit) is reached.

[0064] It should be noted that when the system is put into use for the first time, the low-temperature water tank 15 should be manually filled with tap water.

[0065] The parameters such as the area of ​​the heating area, the size of the energy storage tank, and the configuration of the water source heat pump are now illustrated with specific data. In actual application, users can make calculations and selections based on the actual situation and the method in this utility model.

[0066] 1. Estimation of heating area

[0067] Assume that radiators are used for heating, the supply and return water flow rate is 6t / h, the temperature difference is 15℃ (inlet water 55℃, return water 40℃), the heating time of heating area I and heating area II is 10h (start 1h in advance), and the heating power required per square meter of heating area I and heating area II is 0.1kW / ㎡. Assume that the average COP of the heat pump is 4.5.

[0068] (I) For Example 1 and Example 2

[0069] 1. Energy storage time is 24h-10h-1h=13h

[0070] 2. Heating area I Maximum heating area: 6t / h×1000kg / t×15℃÷860kcal / kW.h÷0.1kW / ㎡=1046.51㎡

[0071] 3. Maximum heating area of ​​heating area II: 6t / h×1000kg / t×15℃÷860kcal / kW.h×13h÷(1-1 / 4.5)÷11h÷0.1kW / ㎡=1590.16㎡

[0072] (II) For Example 3

[0073] 1. Energy storage time is 24h-10h-1h=13h

[0074] 2. Heating area I Maximum heating area: 6t / h×1000kg / t×15℃÷860kcal / kW.h÷0.1kW / ㎡=1046.51㎡

[0075] 3. Maximum heating area of ​​heating area II: 6t / h×1000kg / t×15℃÷860kcal / kW.h×13h÷11h÷0.1kW / ㎡=1236.79㎡

[0076] .2. Estimation of the size of the energy storage tank

[0077] (I) For Example 1

[0078] Select a water source heat pump of appropriate specifications so that the water temperature of the water source heat pump reaches 70℃ and the energy storage tank is 55℃ when the release ends. The size of the energy storage tank is: 6t / h×15℃×13h÷(1-1 / 4.5)÷(70℃-55℃)=100t.

[0079] (II) For Example 2

[0080] The water temperature of the energy storage tank is 45℃ at the end of energy storage, and 25℃ at the end of release. The size of the energy storage tank is: 6t / h×15℃×13h÷(1-1 / 4.5)÷(45℃-25℃)=75t.

[0081] (III) For Example 3

[0082] The sizes of energy storage water tank and low-temperature water tank are: 6t / h×13h=78t.

[0083] 3. Water source heat pump configuration

[0084] (I) For Example 1

[0085] The working time of water source heat pump is 13h

[0086] The heating capacity of water source heat pump is: 1590.16㎡×0.1kW / ㎡×11h÷13h=135kW

[0087] Select 5 10P water source heat pumps.

[0088] (II) For Example 2

[0089] The working time of water source heat pump is 11h

[0090] The heating capacity of water source heat pump is: 1236.79㎡×0.1kW / ㎡×11h÷11h=124kW

[0091] Select 4 10P water source heat pumps.

[0092] 4. Economic Benefit Estimation and Analysis

[0093] (I) Taking Example 1 as an example

[0094] Calculation basis: Harbin's residential heating fee unit price in 2023 is 38.32 yuan / ㎡ (180 days), and the average daily heating cost is 0.2129 yuan / ㎡. The average daily energy consumption per square meter in the Northeast heating season is 40W, and the daytime use is 10 hours, the average daily heat consumption is 0.4kW.h, and the nighttime insulation increases energy consumption by 20%, so the full-day energy consumption is 0.48kW.h. The average COP of the water source heat pump is 4.5. The average electricity price of the water source heat pump after using valley electricity is about 0.35 yuan / kW.h, and the average electricity price of the circulating water pump after using peak and valley electricity is about 0.46 yuan / kW.h.

[0095] The energy cost of water source heat pump per square meter is: 0.48kW.h÷4.5×0.35 yuan / kW.h=0.037 yuan.

[0096] The energy cost of circulating water pump per square meter is: 2kW.h×24h×0.46 yuan / kW.h÷1000㎡=0.0221 yuan.

[0097] .Cost savings per square meter: 0.2129 yuan - 0.037 yuan - 0.0221 yuan = 0.1538 yuan.

[0098] Cost reduction ratio: 0.1538 yuan ÷ (0.2129 yuan / ㎡×2) = 36.12%

[0099] The total cost savings for 1590.16㎡ during the heating season is: 0.1538 yuan / day × 1590.16 × 180 days = 44021.99 yuan.

[0100] Total investment: water source heat pump (5 units of 10P) 60,000 yuan + water tank (100t) 110,000 yuan + other accessories and installation fees 30,000 yuan = 200,000 yuan.

[0101] Payback period: 200,000 ÷ 44,021.99 yuan = 4.54 years.

Claims

1. An energy storage type energy-saving heating system for public places, used for heating in heating area I and heating area II, characterized in that: A heating radiator I is installed in the heating area I, and a heating radiator II is installed in the heating area II. The heating radiator I is respectively connected to the heating water inlet and the heating return water inlet, and a valve I is arranged on the pipeline from the heating water inlet to the heating radiator I; it also includes a set of energy storage devices, which are respectively connected to the heating water inlet, the heating return water inlet and the heating radiator II, and a valve I is arranged on the pipeline from the heating water inlet to the energy storage device.

2. The energy storage type energy-saving heating system for public places according to claim 1 is characterized in that: The energy storage device includes a heat recovery device and an energy storage water tank. The heat recovery device is respectively connected to the heating water inlet, the heating water return inlet, the energy storage water tank inlet, and the energy storage water tank outlet. A water pump and a valve II are arranged on the connecting pipeline between the heat recovery device and the energy storage water tank outlet. The energy storage water tank is connected to the heating radiator II to form a closed-loop pipeline. A water pump and a valve II are arranged on the pipeline from the energy storage water tank to the heating radiator II.

3. The energy storage type energy-saving heating system for public places according to claim 2 is characterized in that: The heat recovery equipment is water source heat pump I.

4. The energy storage type energy-saving heating system for public places according to claim 2, characterized in that: The heat recovery equipment is a water-to-water heat exchanger.

5. The energy storage type energy-saving heating system for public places according to claim 4 is characterized in that: It also includes a water source heat pump II, which is located between the heat storage tank and the heating radiator II. The water pump and valve II are arranged on the pipeline from the water source heat pump II to the energy storage tank. The water pump is arranged on the pipeline from the water source heat pump II to the heating radiator II.

6. The energy storage type energy-saving heating system for public places according to claim 1, characterized in that: The energy storage device includes a water source heat pump III and an energy storage water tank. Valve I is arranged on the pipeline connecting the water inlet of the energy storage water tank and the heating water inlet. A valve water pump and valve II are arranged on the pipeline connecting the water outlet of the energy storage water tank and the heating return water outlet. The water source heat pump III is respectively connected to the energy storage water tank and the heating radiator II. A water pump and valve II are arranged on the pipeline from the energy storage water tank to the water source heat pump III. A water pump is arranged on the pipeline from the water source heat pump III to the heating radiator II.

7. The energy storage type energy-saving heating system for public places according to claim 1, characterized in that: The energy storage device includes an air source heat pump, an energy storage water tank and a low-temperature water tank. Valve I is arranged on the pipeline connecting the water inlet of the energy storage water tank and the heating water inlet. The air source heat pump is connected to the energy storage water tank, and a water pump is arranged on the pipeline from the energy storage water tank to the air source heat pump. The heating radiator II is respectively connected to the energy storage water tank and the low-temperature water tank, and a water pump and valve II are arranged on the pipeline from the energy storage water tank to the heating radiator II. The low-temperature water tank is connected to the heating return water port, and a water pump and valve II are arranged on the connecting pipeline between the two.

8. The energy storage type energy-saving heating system for public places according to claim 1, characterized in that: Valve I is an electric valve.

9. The energy storage type energy-saving heating system for public places according to claim 2, characterized in that: Valve II is an electric regulating valve.

Images