Heat supply system and method for water source heat pump coupling seasonal water pool cooperating with municipal heat supply network

Abstract

The invention discloses a heat supply system and method for a water source heat pump coupled seasonal water pool synergistic municipal heat supply network. In the system, a solar heat collector is connected with a seasonal heat storage water pool through a pipeline via a heat exchanger; the seasonal heat storage water tank and the municipal heat supply network are connected with a heat consumer through a pipeline via a heat exchanger; and the water source heat pump is connected with the seasonal heat storage water tank and the heat consumers through pipelines. According to the system, a multi-source complementary framework with solar energy as a main source, heat pump synergism and municipal administration as a bottom is constructed. In the heat supply season, the system adopts a temperature difference lag control strategy, according to seasonal temperature changes of the heat storage pool, a direct heat supply mode, a water source heat pump coupling heat storage pool heat supply mode and a municipal heat supply network heat compensation mode are automatically switched, and stable transition from high-temperature direct heat supply to low-temperature water pump auxiliary heat supply and then to municipal heat supply network bottom heat supply is achieved. It is guaranteed that the building can obtain continuous and stable heat supply all the time in the heat supply season, and meanwhile, clean energy is utilized in a larger range, and heat supply quality is accurately controlled.

Description

Technical Field

[0001] The present invention belongs to the technical field of multi-source complementary heating, and in particular relates to a heating system and method for a water source heat pump coupled with a seasonal water tank in coordination with a municipal heating network. Background Art

[0002] As a clean and renewable energy, solar energy is abundant and widely distributed, but its energy density is low and is significantly affected by day and night and seasonal fluctuations. A single solar heating system has problems such as discontinuous heating and imbalance between supply and demand in winter. Although traditional short-term heat storage devices (such as water tanks) can temporarily store heat, their heat storage capacity is limited, making it difficult to achieve cross-seasonal energy allocation. Therefore, in recent years, cross-seasonal heat storage technology has gradually attracted attention. Among them, seasonal heat storage tanks such as large underground water tanks or buried thermal storage bodies can be used to store solar heat in the non-heating season and release it for heating in winter.

[0003] However, during the operation of the heating season, the temperature of the heat storage body continues to drop with the release of heat and the heat loss from the environment. When the temperature of the water pool drops below 50°C, it is difficult for the traditional plate heat exchanger to directly meet the heating needs of the building. At this time, there is still a large amount of low-grade heat energy of 40~50°C in the water pool, but it cannot be effectively extracted due to insufficient temperature difference, resulting in heat waste. Existing technologies usually use electric heating or gas boilers as auxiliary supplementary heat sources, but they cannot make full use of the remaining heat of the heat storage body and increase the consumption of fossil energy. Summary of the invention

[0004] In order to overcome the limitations of the above-mentioned prior art, the present invention proposes a heating system and method of a water source heat pump coupled with a seasonal water pool in coordination with a municipal heating network. Through the four-level coupling of solar energy collection, cross-seasonal heat storage, water source heat pump heating and municipal heating network guarantee, a multi-source complementary architecture of "solar energy as the main, heat pump efficiency enhancement, and municipal guarantee" is constructed. The system makes full use of solar energy, collects solar radiation energy through collectors throughout the year and stores it in seasonal water pools. During the heating season, the system switches the cascade heating of seasonal water pools, auxiliary water source heat pumps and municipal heating networks according to the changes in the internal energy of the seasonal hot water storage pools, realizing a smooth transition from high-temperature direct heating to low-temperature water pump auxiliary heating, and then to supplementary heating of the municipal heating network, ensuring that the building always obtains continuous and stable heat supply during the heating season, thereby improving living comfort.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is:

[0006] A heating system of a water source heat pump coupled with a seasonal water tank and a coordinated municipal heating network, comprising a solar collector array 1, a circulating pump 1 2, a first heat exchanger 3, a circulating pump 2 4, a circulating pump 3 5, a second heat exchanger 6, a circulating pump 4 7, a water source heat pump evaporator 8, a water source heat pump condenser 9, a water source heat pump expansion valve 10, a water source heat pump compressor 11, a circulating pump 5 12, a seasonal hot water storage tank 13, other heat user systems 14, and a heat user 15.

[0007] The outlet of the solar thermal collector array 1 is connected to a temperature sensor 111, a gate valve 121, and a source side inlet of the first heat exchanger 3 in sequence through a heat collection system water supply pipe 101; the source side outlet of the first heat exchanger 3 is connected to a circulation pump 2, a gate valve 122, and an inlet of the solar thermal collector array 1 in sequence through a heat collection system return pipe 102; the temperature sensor 111 monitors the outlet temperature of the solar thermal collector array 1 in real time and transmits these signals to the system controller.

[0008] The seasonal hot water storage tank 13 has temperature thermal stratification, with high water temperature in the upper part and low water temperature in the lower part. An inlet pipeline, an outlet pipeline and a temperature sensor 1311 are respectively arranged at the upper high temperature part of the seasonal hot water storage tank 13, and an inlet pipeline, an outlet pipeline and a temperature sensor 1312 are respectively arranged at the lower low temperature part of the seasonal hot water storage tank 13; the seasonal hot water storage tank 13 is connected to the circulation pump 24, the gate valve 4 322 and the load side inlet of the first heat exchanger 3 in sequence through the lower water supply pipe 302 of the seasonal hot water storage tank, and the load side outlet of the first heat exchanger 3 is connected to the gate valve 321 and the seasonal hot water storage tank 13 in sequence through the upper return pipe 301 of the seasonal hot water storage tank; the temperature sensor 1311 monitors the temperature at the upper high temperature part of the circulation pump 24 in real time, and the temperature sensor 3 1312 monitors the temperature at the lower low temperature part of the circulation pump 24 in real time, and transmits these signals to the system controller.

[0009] The seasonal hot water storage tank 13 is connected with the diverter valve 1 812, the gate valve 5 1321, the combining valve 3 1511 and the source side inlet of the second heat exchanger 6 in sequence through the upper water supply pipe 1301 of the seasonal hot water storage tank; the source side outlet of the second heat exchanger 6 is connected with the diverter valve 3 1512, the circulating pump 3 5, the gate valve 6 1322, the combining valve 1 811 and the seasonal hot water storage tank 13 in sequence through the lower return pipe 1302 of the seasonal hot water storage tank; the load side outlet of the second heat exchanger 6 is connected with the gate valve 7 621, the combining valve 2 911 and the hot user 15 in sequence through the hot user water supply pipe 601; the hot user 15 is connected with the circulating pump 4 7, the diverter valve 2 912, the gate valve 8 622 and the load side inlet of the second heat exchanger 6 in sequence through the hot user return pipe 602.

[0010] The source side outlet of the water source heat pump evaporator 8 is connected to the circulation pump 5 12, the gate valve 9 821, and the confluence valve 1 811 in sequence through the water source heat pump evaporator water supply pipe 801, and the source side inlet of the water source heat pump evaporator 8 is connected to the gate valve 10 822 and the diverter valve 1 812 in sequence through the water source heat pump evaporator return pipe 802; the refrigerant side outlet of the water source heat pump evaporator 8 is connected to the water source heat pump compressor 11 and the refrigerant side inlet of the water source heat pump condenser 9 in sequence through the second internal pipeline 1002 of the water source heat pump The refrigerant side outlet of the water source heat pump condenser 9 is connected to the water source heat pump expansion valve 10 and the refrigerant side inlet of the water source heat pump evaporator 8 in sequence through the first internal pipe 1001 of the water source heat pump; the load side outlet of the water source heat pump condenser 9 is connected to the gate valve 11 921 and the combining valve 2 911 in sequence through the water source heat pump condenser water supply pipe 901, and the load side inlet of the water source heat pump condenser 9 is connected to the gate valve 12 922 and the diverter valve 2 912 in sequence through the water source heat pump condenser return pipe 902.

[0011] The municipal heating network water supply pipe 1501 is connected to the corresponding multiple other heat user systems 14 through multiple other heat user system water supply pipes 1401, and the multiple other heat user systems 14 are connected to the municipal heating network return pipe 1502 through the corresponding multiple other heat user system return pipes 1402; the municipal heating network water supply pipe 1501 is connected to the combining valve three 1511 through the gate valve thirteen 1521, and the municipal heating network return pipe 1502 is connected to the diverter valve three 1512 through the gate valve fourteen 1522.

[0012] The solar collector array 1 can be selected from various types of solar collectors such as flat plate type and vacuum tube type, and the operating medium can be selected from antifreeze liquid and water.

[0013] The first heat exchanger 3 and the second heat exchanger 6 are both plate heat exchangers.

[0014] The circulating pump 1 2, circulating pump 2 4, circulating pump 3 5, circulating pump 4 7 and circulating pump 5 12 are all variable speed circulating pumps.

[0015] The seasonal hot water storage tank 13 can be a steel structure tank type or an underground type. The underground type can be in the shape of a cylinder, an inverted truncated cone, an inverted quadrangular cone, a cuboid, etc. The side walls and the bottom are provided with an insulation layer and a waterproof layer, and the top cover is made of insulation material.

[0016] The heat user 15 may choose to heat by floor radiation.

[0017] The present invention also provides a working method for a heating system of a water source heat pump coupled with a seasonal hot water storage tank in coordination with a municipal heating network, including a solar energy heat collection and storage mode, a seasonal water tank direct heating mode, a water source heat pump coupled with a seasonal hot water storage tank heating mode, and a municipal heating network heating mode. A centralized heating regulation method of mass-flow regulation is adopted in the heating season, and temperature differential hysteresis control is used when switching between different heating modes to avoid the system oscillating back and forth between the critical points of the two modes.

[0018] The above solar energy collection and storage mode operates throughout the year. When the solar radiation is lower than the set value 1 (for example, 150W / m 2 ) or when the temperature measured by temperature sensor 1 111 is lower than the set temperature 1 (for example, 5°C) than the temperature of temperature sensor 2 1311, gate valve 1 121, gate valve 2 122, gate valve 3 321, gate valve 4 322, circulation pump 1 2, circulation pump 2 4 are closed, the solar collector array 1 does not collect solar radiation energy, and the seasonal hot water storage tank 13 does not store heat.

[0019] When the solar radiation is higher than the set value 1 (for example 150W / m 2 ) and the temperature measured by temperature sensor 111 is higher than the temperature of temperature sensor 2 1311 and is higher than the set temperature 1 (for example, 5°C), gate valve 121, gate valve 2 122, gate valve 3 321, gate valve 4 322, circulation pump 1 2, circulation pump 2 4 are opened, and the working fluid passes through the solar collector array 1 to collect solar radiation energy, changing from a low-temperature state to a high-temperature state, and heat is stored in the upper high-temperature area of ​​the seasonal hot water storage tank 13 through heat exchange by the first heat exchanger 3; until the temperature of temperature sensor 111 is higher than the temperature of temperature sensor 2 1311 and the value is less than the set temperature 2 (for example, 2°C), gate valve 121, gate valve 2 122, gate valve 3 321, gate valve 4 322, circulation pump 1 2, circulation pump 2 4 are closed, and solar radiation energy is not collected, and the seasonal hot water storage tank 13 does not store heat.

[0020] When it is in the non-heating season, there is no need to supply heat to the heat user 15, and gate valve seven 621, gate valve eight 622, gate valve five 1321, gate valve six 1322, gate valve nine 821, gate valve ten 822, gate valve eleven 921, gate valve twelve 922, gate valve thirteen 1521, gate valve fourteen 1522, circulating pump three 5, circulating pump four 7, and circulating pump five 12 are closed.

[0021] In the above-mentioned seasonal water pool direct heating mode, when it is in the heating season and the temperature of the temperature sensor two 1311 is higher than the set temperature 3 (for example, 50°C), the gate valve seven 621, the gate valve eight 622, the gate valve five 1321, the gate valve six 1322, the circulation pump three 5, and the circulation pump four 7 are opened, and the gate valve nine 821, the gate valve ten 822, the gate valve eleven 921, the gate valve twelve 922, the gate valve thirteen 1521, the gate valve fourteen 1522, and the circulation pump five 12 are closed, and the seasonal hot water storage pool 13 supplies heat to the heat user 15 through the second heat exchanger 6; until the temperature of the temperature sensor two 1311 is not higher than the set temperature 4 (for example, 45°C), the gate valve five 1321, the gate valve six 1322, and the circulation pump three 5 are closed, and the seasonal hot water storage pool 13 is not used for direct heating, and the water source heat pump coupled seasonal hot water storage pool heating mode is switched.

[0022] In the above-mentioned water source heat pump coupled seasonal hot water storage tank heating mode, when it is in the heating season and the temperature of the temperature sensor 2 1311 is not higher than the set temperature 4 (for example, 45°C), and the temperature of the temperature sensor 2 1311 is higher than the set temperature 5 (for example, 20°C), the gate valve 7 621, the gate valve 8 622, the gate valve 9 821, the gate valve 10 822, the gate valve 11 921, the gate valve 12 922, the circulation pump 5 12, and the circulation pump 4 7 are opened, and the gate valve 5 1321, the gate valve 6 1322, the gate valve 13 1521, and the gate valve 14 are closed. 1522, circulating pump three 5, the water source heat pump evaporator 8 absorbs heat with the seasonal hot water storage tank 13 as the heat source side, and the water source heat pump condenser 9 releases heat for heating with the heat user 15 as the load side; until the temperature of the temperature sensor two 1311 is not higher than the set temperature 6 (for example, 12°C), close the gate valve nine 821, the gate valve ten 822, the gate valve eleven 921, the gate valve twelve 922, and the circulating pump five 12, do not use the water source heat pump coupled with the seasonal hot water storage tank for heating, and switch to the municipal heating network heating mode.

[0023] In the above-mentioned municipal heating network heating mode, when it is in the heating season and the temperature of temperature sensor two 1311 is not higher than the set temperature 6 (for example, 12°C), gate valve seven 621, gate valve eight 622, gate valve thirteen 1521, gate valve fourteen 1522, and circulating pump four 7 are opened, and gate valve nine 821, gate valve ten 822, gate valve eleven 921, gate valve twelve 922, gate valve five 1321, gate valve six 1322, circulating pump three 5, and circulating pump five 12 are closed, and the municipal heating network water supply pipe 1501 and the municipal heating network return pipe 1502 supply heat to the heat user 15 through the second heat exchanger 6.

[0024] Beneficial effects of the present invention:

[0025] The present invention provides heating through a water source heat pump coupled with a seasonal hot water storage tank, so that low-grade thermal energy of 40-50°C that was originally difficult to directly utilize is efficiently recovered, thereby avoiding energy waste; at the same time, the temperature of the working fluid in the hot water storage tank is further reduced, thereby optimizing the working conditions of the solar collector, improving the solar energy collection efficiency, and enhancing the overall efficiency of the system.

[0026] The heating system constructed by the present invention constructs a multi-source complementary architecture of "solar energy as the main source, heat pumps to enhance efficiency, and municipal guarantees". Through the four-level coupling of solar energy collection, cross-seasonal heat storage, water source heat pump heating and municipal heating network protection, it ensures that the system can maintain stable heating under various weather conditions and different working conditions such as heat collection fluctuations and heat storage attenuation, while improving the contribution rate of solar energy and reducing the load on the municipal heating network.

[0027] The control method used in the present invention utilizes a temperature differential control strategy and a mass-flow regulation method to perform real-time monitoring and intelligent regulation of collectors, seasonal water pools, and heat sources at all levels, so that the system can flexibly adjust the operating mode according to the external environment, building load, and dynamic changes in the water pool temperature, thereby ensuring the coordinated and optimized operation of each heat source and achieving higher operating efficiency and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention is further described below in conjunction with the accompanying drawings:

[0029] Figure 1 A system diagram of a heating system that provides a water source heat pump coupled with a seasonal hot water storage tank and a municipal heating network for the implementation of the present invention.

[0030] Figure 2 A control flow chart of the system heat storage working condition provided for the implementation of the present invention.

[0031] Figure 3 A control flow chart of the system heating conditions provided for the implementation of the present invention.

[0032] Reference numerals:

[0033] 1 Solar collector array; 2 Circulating pump 1; 3 First heat exchanger; 4 Circulating pump 2; 5 Circulating pump 3; 6 Second heat exchanger; 7 Circulating pump 4; 8 Water source heat pump evaporator; 9 Water source heat pump condenser; 10 Water source heat pump expansion valve; 11 Water source heat pump compressor; 12 Circulating pump 5; 13 Seasonal hot water storage tank; 14 Other heat user systems; 15 Heat user; 101 Heat collection system water supply pipe; 102 Heat collection system return pipe; 301 Seasonal hot water storage tank upper return pipe; 302 Seasonal hot water storage tank lower supply pipe; 1301 Seasonal hot water storage tank upper supply pipe; 1302 Seasonal hot water storage tank lower return pipe; 801 Water source heat pump evaporator water supply pipe; 802 Water source heat pump evaporator return pipe; 901 Water source heat pump condenser water supply pipe; 902 Water source heat pump condenser return pipe; 1001 First internal pipeline of water source heat pump; 10 02 The second internal pipe of the water source heat pump; 601 The water supply pipe of the heat user; 602 The return pipe of the heat user; 1401 The water supply pipe of other heat user systems; 1402 The return pipe of other heat user systems; 1501 The water supply pipe of the municipal heating network; 1502 The return pipe of the municipal heating network; 111 Temperature sensor 1; 1311 Temperature sensor 2; 1312 Temperature sensor 3; 811 Combiner valve 1; 812 Diverter valve 1; 91 1 combining valve two; 912 diverting valve two; 1511 combining valve three; 1512 diverting valve three; 121 gate valve one; 122 gate valve two; 321 gate valve three; 322 gate valve four; 1321 gate valve five; 1322 gate valve six; 621 gate valve seven; 622 gate valve eight; 821 gate valve nine; 822 gate valve ten; 921 gate valve eleven; 922 gate valve twelve; 1521 gate valve thirteen; 1522 gate valve fourteen. DETAILED DESCRIPTION

[0034] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0035] like Figure 1As shown, the heating system of the water source heat pump coupled with the seasonal hot water storage tank and the municipal heating network provided in this embodiment includes: a solar collector array 1; a circulating pump 1 2; a first heat exchanger 3; a circulating pump 2 4; a circulating pump 3 5; a second heat exchanger 6; a circulating pump 4 7; a water source heat pump evaporator 8; a water source heat pump condenser 9; a water source heat pump expansion valve 10; a water source heat pump compressor 11; a circulating pump 5 12; a seasonal hot water storage tank 13; other heat user systems 1 4; heat user 15; heat collection system water supply pipe 101; heat collection system return pipe 102; seasonal hot water storage tank upper return pipe 301; seasonal hot water storage tank lower water supply pipe 302; seasonal hot water storage tank upper water supply pipe 1301; seasonal hot water storage tank lower return pipe 1302; water source heat pump evaporator water supply pipe 801; water source heat pump evaporator return pipe 802; water source heat pump condenser water supply pipe 901; water source heat pump condenser return pipe 902 ; The first pipe 1001 inside the water source heat pump; The second pipe 1002 inside the water source heat pump; The water supply pipe 601 for heat users; The water return pipe 602 for heat users; The water supply pipe 1401 for other heat users; The water return pipe 1402 for other heat users; The water supply pipe 1501 for the municipal heating network; The water return pipe 1502 for the municipal heating network; The temperature sensor 111; The temperature sensor 21311; The temperature sensor 31312; The confluence valve 1811; The distribution Flow valve one 812; combining valve two 911; diverting valve two 912; combining valve three 1511; diverting valve three 1512; gate valve one 121; gate valve two 122; gate valve three 321; gate valve four 322; gate valve five 1321; gate valve six 1322; gate valve seven 621; gate valve eight 622; gate valve nine 821; gate valve ten 822; gate valve eleven 921; gate valve twelve 922; gate valve thirteen 1521; gate valve fourteen 1522.

[0036] The outlet of the solar collector array 1 is connected to the temperature sensor 111, the gate valve 121, and the source side inlet of the first heat exchanger 3 in sequence through the water supply pipe 101 of the heat collection system, and the source side outlet of the first heat exchanger 3 is connected to the circulation pump 2, the gate valve 2 122, and the inlet of the solar collector array 1 in sequence through the return pipe 102 of the heat collection system; the seasonal hot water storage tank 13 is connected to the circulation pump 2 4, the gate valve 4 322, and the load side inlet of the first heat exchanger 3 in sequence through the lower water supply pipe 302 of the seasonal hot water storage tank, and the load side outlet of the first heat exchanger 3 is connected to the gate valve 3 321 and the seasonal hot water storage tank 13 in sequence through the upper return pipe 301 of the seasonal hot water storage tank; the temperature sensor 2 1311 is arranged at the high temperature at the upper part of the seasonal hot water storage tank 13, and the temperature sensor 3 1312 is arranged at the low temperature at the lower part of the seasonal hot water storage tank 13.

[0037] The seasonal hot water storage tank 13 is connected with the diverter valve 1 812, the gate valve 5 1321, the combining valve 3 1511 and the source side inlet of the second heat exchanger 6 in sequence through the upper water supply pipe 1301 of the seasonal hot water storage tank; the source side outlet of the second heat exchanger 6 is connected with the diverter valve 3 1512, the circulating pump 3 5, the gate valve 6 1322, the combining valve 1 811 and the seasonal hot water storage tank 13 in sequence through the lower return pipe 1302 of the seasonal hot water storage tank; the load side outlet of the second heat exchanger 6 is connected with the gate valve 7 621, the combining valve 2 911 and the hot user 15 in sequence through the hot user water supply pipe 601; the hot user 15 is connected with the circulating pump 4 7, the diverter valve 2 912, the gate valve 8 622 and the load side inlet of the second heat exchanger 6 in sequence through the hot user return pipe 602.

[0038] The outlet of the water source heat pump evaporator 8 on the source side is connected to the circulating pump 5 12, the gate valve 9 821, and the confluence valve 1 811 in sequence through the water source heat pump evaporator water supply pipe 801, and the inlet of the water source heat pump evaporator 8 on the source side is connected to the gate valve 10 822 and the diverter valve 1 812 in sequence through the water source heat pump evaporator return pipe 802; the outlet of the refrigerant side of the water source heat pump evaporator 8 is connected to the refrigerant side inlet of the water source heat pump compressor 11 and the water source heat pump condenser 9 in sequence through the second pipe 1002 inside the water source heat pump The refrigerant side outlet of the water source heat pump condenser 9 is connected to the water source heat pump expansion valve 10 and the refrigerant side inlet of the water source heat pump evaporator 8 in sequence through the first internal pipe 1001 of the water source heat pump; the load side outlet of the water source heat pump condenser 9 is connected to the gate valve 11 921 and the combining valve 2 911 in sequence through the water source heat pump condenser water supply pipe 901, and the load side inlet of the water source heat pump condenser 9 is connected to the gate valve 12 922 and the diverter valve 2 912 in sequence through the water source heat pump condenser return pipe 902.

[0039] The municipal heating network water supply pipe 1501 is connected to the corresponding multiple other heating user systems 14 through multiple other heating user system water supply pipes 1401, and the multiple other heating user systems 14 are connected to the municipal heating network return pipe 1502 through the corresponding multiple other heating user system return pipes 1402; the municipal heating network water supply pipe 1501 is connected to the combining valve three 1511 through the gate valve thirteen 1521, and the municipal heating network return pipe 1502 is connected to the diverter valve three 1512 through the gate valve fourteen 1522.

[0040] The solar collector array 1 can be a flat plate type, a vacuum tube type or other types of solar collectors, and the operating medium can be antifreeze liquid or water.

[0041] The first heat exchanger 3 and the second heat exchanger 6 are both plate heat exchangers.

[0042] Circulation pump one 2, circulation pump two 4, circulation pump three 5, circulation pump four 7, circulation pump five 12 are all variable speed circulation pumps.

[0043] The seasonal hot water storage tank 13 can be a steel structure tank type or an underground type. The underground type can be in the shape of a cylinder, an inverted truncated cone, an inverted quadrangular cone, a cuboid, etc. The side walls and the bottom are provided with an insulation layer and a waterproof layer, and the top cover is made of insulation material.

[0044] The working method of the heating system of the water source heat pump coupled with the seasonal hot water storage tank and the municipal heating network includes the solar energy heat collection and storage mode, the seasonal water tank direct heating mode, the water source heat pump coupled with the seasonal hot water storage tank heating mode, and the municipal heating network heating mode. The centralized heating regulation method of mass-flow regulation is adopted in the heating season. When switching between different heating modes, temperature differential hysteresis control is used to avoid the system oscillating back and forth between the critical points of the two modes.

[0045] like Figure 2 As shown in the solar heat storage mode, when the solar radiation is lower than the set value 1 (for example, 150W / m 2 ) or when the temperature measured by the temperature sensor 1 111 is lower than the temperature of the temperature sensor 2 1311 by a set temperature 1 (for example, 5°C), the gate valve 1 121, the gate valve 2 122, the gate valve 3 321, the gate valve 4 322, the circulation pump 1 2, and the circulation pump 2 4 are closed;

[0046] When the solar radiation is higher than the set value 1 (for example 150W / m 2 ) and when the temperature measured by temperature sensor 111 is higher than the temperature of temperature sensor 2 1311 and is higher than the set temperature 1 (for example 5°C), open gate valve 121, gate valve 2 122, gate valve 3 321, gate valve 4 322, circulation pump 1 2, circulation pump 2 4, until the value of temperature sensor 1 111 higher than the temperature of temperature sensor 2 1311 is less than the set temperature 2 (for example 2°C), then close gate valve 121, gate valve 2 122, gate valve 3 321, gate valve 4 322, circulation pump 1 2, circulation pump 2 4.

[0047] like Figure 3 As shown, when it is in the non-heating season, close gate valve seven 621, gate valve eight 622, gate valve five 1321, gate valve six 1322, gate valve nine 821, gate valve ten 822, gate valve eleven 921, gate valve twelve 922, gate valve thirteen 1521, gate valve fourteen 1522, circulating pump three 5, circulating pump four 7, and circulating pump five 12.

[0048] Among them, in the seasonal water pool direct heating mode, when it is in the heating season and the temperature of temperature sensor two 1311 is higher than the set temperature 3 (for example, 50°C), open gate valve seven 621, gate valve eight 622, gate valve five 1321, gate valve six 1322, circulation pump three 5, and circulation pump four 7, and close gate valve nine 821, gate valve ten 822, gate valve eleven 921, gate valve twelve 922, gate valve thirteen 1521, gate valve fourteen 1522, and circulation pump five 12, until the temperature of temperature sensor two 1311 is not higher than the set temperature 4 (for example, 45°C), then close gate valve five 1321, gate valve six 1322, and circulation pump three 5.

[0049] Among them, in the water source heat pump coupled with the seasonal hot water storage tank heating mode, when it is in the heating season and the temperature of temperature sensor two 1311 is not higher than the set temperature 4 (for example, 45°C), and the temperature of temperature sensor two 1311 is higher than the set temperature 5 (for example, 20°C), open gate valve seven 621, gate valve eight 622, gate valve nine 821, gate valve ten 822, gate valve eleven 921, gate valve twelve 922, circulation pump five 12, and circulation pump four 7, and close gate valve five 1321, gate valve six 1322, gate valve thirteen 1521, gate valve fourteen 1522, and circulation pump three 5, until the temperature of temperature sensor two 1311 is not higher than the set temperature 6 (for example, 12°C), then close gate valve nine 821, gate valve ten 822, gate valve eleven 921, gate valve twelve 922, and circulation pump five 12.

[0050] Among them, in the municipal heating network heating mode, when it is in the heating season and the temperature of temperature sensor two 1311 is not higher than the set temperature 6 (for example 12°C), gate valve seven 621, gate valve eight 622, gate valve thirteen 1521, gate valve fourteen 1522, and circulating pump four 7 are opened, and gate valve nine 821, gate valve ten 822, gate valve eleven 921, gate valve twelve 922, gate valve five 1321, gate valve six 1322, circulating pump three 5, and circulating pump five 12 are closed.

Claims

1. A heating system of a water source heat pump coupled with a seasonal water pool and a municipal heating network, characterized in that: The invention comprises a solar thermal collector array (1), a circulation pump 1 (2), a first heat exchanger (3), a circulation pump 2 (4), a circulation pump 3 (5), a second heat exchanger (6), a circulation pump 4 (7), a water source heat pump evaporator (8), a water source heat pump condenser (9), a water source heat pump expansion valve (10), a water source heat pump compressor (11), a circulation pump 5 (12), a seasonal hot water storage tank (13), other heat user systems (14), and a heat user (15); the outlet of the solar thermal collector array (1) is connected to a temperature sensor 1 (111), a gate valve 1 (121), and a source side inlet of the first heat exchanger (3) in sequence through a heat collection system water supply pipe (101); the source side outlet of the first heat exchanger (3) is connected to a return water pipe (121) of the heat collection system. 02) is connected to the circulation pump 1 (2), the gate valve 2 (122), and the inlet of the solar collector array (1) in sequence; the seasonal hot water storage tank (13) is connected to the circulation pump 2 (4), the gate valve 4 (322), and the load side inlet of the first heat exchanger (3) in sequence through the lower water supply pipe (302) of the seasonal hot water storage tank; the load side outlet of the first heat exchanger (3) is connected to the gate valve 3 (321) and the seasonal hot water storage tank (13) in sequence through the upper water return pipe (301) of the seasonal hot water storage tank; the seasonal hot water storage tank (13) is connected to the diverter valve 1 (812), the gate valve 5 (1321), the converging valve 3 (1511), and the source side inlet of the second heat exchanger (6) in sequence through the upper water supply pipe (1301) of the seasonal hot water storage tank The source side outlet of the second heat exchanger (6) is connected in sequence to the diverter valve three (1512), the circulating pump three (5), the gate valve six (1322), the combining valve one (811), and the seasonal hot water storage tank (13) through the lower return pipe (1302) of the seasonal hot water storage tank; the load side outlet of the second heat exchanger (6) is connected in sequence to the gate valve seven (621), the combining valve two (911), and the heat user (15) through the heat user water supply pipe (601); the heat user (15) is connected in sequence to the circulating pump four (7), the diverter valve two (912), the gate valve eight (622), and the load side inlet of the second heat exchanger (6) through the heat user return pipe (602); the source side outlet of the water source heat pump evaporator (8) is connected to the water source heat pump The evaporator water supply pipe (801) is connected to the circulation pump five (12), the gate valve nine (821), and the converging valve one (811) in sequence; the source side inlet of the water source heat pump evaporator (8) is connected to the gate valve ten (822) and the diverter valve one (812) in sequence through the water source heat pump evaporator return pipe (802); the refrigerant side outlet of the water source heat pump evaporator (8) is connected to the water source heat pump compressor (11) and the refrigerant side inlet of the water source heat pump condenser (9) in sequence through the second pipe (1002) inside the water source heat pump; the refrigerant side outlet of the water source heat pump condenser (9) is connected to the water source heat pump expansion valve (10) and the refrigerant side inlet of the water source heat pump evaporator (8) in sequence through the first pipe (1001) inside the water source heat pump;The load-side outlet of the water source heat pump condenser (9) is connected to gate valve 11 (921) and confluence valve 2 (911) in sequence through the water source heat pump condenser water supply pipe (901), and the load-side inlet of the water source heat pump condenser (9) is connected to gate valve 12 (922) and diversion valve 2 (912) in sequence through the water source heat pump condenser return pipe (902); the municipal heating network water supply pipe (1501) is connected to the corresponding water supply pipes (1401) of multiple other heat user systems through multiple water supply pipes (1401) of multiple heat user systems. The multiple other heat user systems (14) are connected to the municipal heat network return pipe (1502) through the corresponding multiple other heat user system return pipes (1402); the municipal heat network water supply pipe (1501) is connected to the confluence valve 3 (1511) through the gate valve 13 (1521), and the municipal heat network return pipe (1502) is connected to the diversion valve 3 (1512) through the gate valve 14 (1522).

2. A heating system of a water source heat pump coupled with a seasonal water tank and a municipal heating network according to claim 1, characterized in that: The seasonal hot water storage tank (13) has temperature stratification, with the water temperature at the upper part being high and the water temperature at the lower part being low. An inlet pipeline, an outlet pipeline and a second temperature sensor (1311) are respectively arranged at the upper high-temperature part of the seasonal hot water storage tank (13), and an inlet pipeline, an outlet pipeline and a third temperature sensor (1312) are respectively arranged at the lower low-temperature part of the seasonal hot water storage tank (13); the second temperature sensor (1311) monitors the temperature at the upper high-temperature part of the second circulating pump (4) in real time, and the third temperature sensor (1312) monitors the temperature at the lower low-temperature part of the second circulating pump (4) in real time, and transmits these signals to a system controller.

3. A heating system of a water source heat pump coupled with a seasonal water tank and a municipal heating network according to claim 1, characterized in that: The solar thermal collector array (1) can be a flat plate type, a vacuum tube type or other type of solar thermal collector, and the operating fluid can be antifreeze liquid or water. The temperature sensor 1 (111) monitors the outlet temperature of the solar thermal collector array (1) in real time and transmits these signals to the system controller.

4. A heating system of a water source heat pump coupled with a seasonal water tank and a municipal heating network according to claim 1, characterized in that: The first heat exchanger (3) and the second heat exchanger (6) are both plate heat exchangers; the circulating pump 1 (2), circulating pump 2 (4), circulating pump 3 (5), circulating pump 4 (7) and circulating pump 5 (12) are all variable speed circulating pumps.

5. The heating system of a water source heat pump coupled with a seasonal water tank and a municipal heating network according to claim 1 is characterized in that: The heat user (15) may choose to use floor radiation for heating.

6. A heating system of a water source heat pump coupled with a seasonal water tank and a municipal heating network according to claims 1 and 2, characterized in that: The seasonal hot water storage tank (13) can be a steel structure tank type or an underground type. The underground type can be a cylinder, an inverted truncated cone, an inverted quadrangular cone, a cuboid, etc. The side walls and the bottom are provided with a thermal insulation layer and a waterproof layer, and the top cover is made of thermal insulation material.

7. A control method for a heating system of a water source heat pump coupled with a seasonal water tank and a municipal heating network according to claims 1 to 6, characterized in that: It includes solar energy heat collection and storage mode, seasonal water pool direct heating mode, water source heat pump coupled seasonal hot water storage pool heating mode, and municipal heating network heating mode. The centralized heating regulation method of mass-flow regulation is adopted in the heating season. Temperature differential hysteresis control is used when switching between different heating modes to avoid the system oscillating back and forth between the critical points of the two modes. A multi-source complementary architecture of "solar energy as the main, heat pump efficiency enhancement, and municipal guarantee" is constructed. Through the four-level coupling of solar energy collection, cross-seasonal heat storage, water source heat pump heating and municipal heating network guarantee, the system can be ensured to operate stably under all weather and seasonal conditions, while improving the contribution rate of solar energy and reducing the load on the municipal heating network.

8. The control method of a heating system of a water source heat pump coupled with a seasonal water tank and a municipal heating network according to claim 7, characterized in that: The solar thermal collection and storage mode operates throughout the year. When the solar radiation is lower than the set value 1 or the temperature measured by the temperature sensor 1 (111) is lower than the set temperature 1 than the temperature measured by the temperature sensor 2 (1311), the gate valve 1 (121), the gate valve 2 (122), the gate valve 3 (321), the gate valve 4 (322), the circulation pump 1 (2), and the circulation pump 2 (4) are closed, and the solar thermal collector array (1) does not collect solar radiation energy, and the seasonal hot water storage tank (13) does not store heat. When the solar radiation is higher than the set value 1 and the temperature measured by the temperature sensor 1 (111) is higher than the set temperature 1 than the temperature measured by the temperature sensor 2 (1311), the solar thermal collector array (1) does not collect solar radiation energy, and the seasonal hot water storage tank (13) does not store heat. When the temperature sensor 1 (111) and the temperature sensor 2 (122) are connected, the gate valve 3 (321) and the gate valve 4 (322) are opened, the circulation pump 1 (2) and the circulation pump 2 (4) are opened, and the working fluid passes through the solar collector array (1) to collect solar radiation energy, and changes from a low temperature state to a high temperature state, and heat is stored in the upper high temperature area of ​​the seasonal hot water storage tank (13) through heat exchange by the first heat exchanger (3); until the temperature measured by the temperature sensor 1 (111) is less than the set temperature 2 and the temperature measured by the temperature sensor 2 (1311) is less than the set temperature 2. When the solar energy is not collected, the seasonal heat storage tank (13) does not store heat. When the solar energy is not collected, the gate valve 1 (121), the gate valve 2 (122), the gate valve 3 (321), the gate valve 4 (322), the circulation pump 1 (2), and the circulation pump 2 (4) are closed. When the solar energy is not collected, the seasonal heat storage tank (13) does not store heat. When the solar energy is not collected, the gate valve 7 (621), the gate valve 8 (622), the gate valve 5 (1321), the gate valve 6 (1322), the gate valve 9 (821), the gate valve 10 (822), the gate valve 11 (921), the gate valve 12 (922), the gate valve 13 (1521), the gate valve 14 (1522), the circulation pump 3 (5), the circulation pump 4 (7), and the circulation pump 5 (12) are closed. There is no need to supply heat to the heat user (15).

9. The control method of a heating system of a water source heat pump coupled with a seasonal water tank and a municipal heating network according to claim 7, characterized in that: In the seasonal water tank direct heating mode, when it is in the heating season and the temperature measured by the temperature sensor 2 (1311) is higher than the set temperature 3, the gate valve 7 (621), the gate valve 8 (622), the gate valve 5 (1321), the gate valve 6 (1322), the circulation pump 3 (5), and the circulation pump 4 (7) are opened, and the gate valve 9 (821), the gate valve 10 (822), the gate valve 11 (921), the gate valve 12 (922), the gate valve 13 (1521), the gate valve 14 (1522), and the circulation pump 5 (12) are closed, and the seasonal water storage tank (13) supplies heat to the heat user (15) through the second heat exchanger (6); until the temperature measured by the temperature sensor 2 (1311) is not higher than the set temperature 4 When the temperature is within the heating season, the gate valve 5 (1321), gate valve 6 (1322), and circulation pump 3 (5) are closed to stop the direct heating of the seasonal hot water storage tank (13) and switch to the water source heat pump coupled with the seasonal hot water storage tank heating mode; in the water source heat pump coupled with the seasonal hot water storage tank heating mode, when it is in the heating season and the temperature measured by the temperature sensor 2 (1311) is not higher than the set temperature 4 but higher than the set temperature 5 When the temperature sensor 2 (1311) detects that the temperature is not higher than the set temperature 6, the water source heat pump evaporator (8) absorbs heat from the seasonal hot water storage tank (13) as the heat source, and the water source heat pump condenser (9) releases heat from the heat user (15) as the load side to provide heat; until the temperature sensor 2 (1311) measures a temperature no higher than the set temperature 6. When the temperature is within the heating season, close gate valve nine (821), gate valve ten (822), gate valve eleven (921), gate valve twelve (922), and circulation pump five (12), stop the water source heat pump coupled with the seasonal hot water storage tank to supply heat, and switch to the municipal heating network heating mode; in the municipal heating network heating mode, when it is in the heating season and the temperature measured by temperature sensor two (1311) is not higher than the set temperature 6 When the heat supply pipe (1501) and the return pipe (1502) of the municipal heating network supply water supply pipe (1501) and the return pipe (1502) of the municipal heating network supply water supply pipe (1501) supply water to the heat user (15) through the second heat exchanger (6), the gate valve seven (621), the gate valve eight (622), the gate valve thirteen (1521), the gate valve fourteen (1522), and the circulating pump four (7) are opened, and the gate valve nine (821), the gate valve ten (822), the gate valve eleven (921), the gate valve twelve (922), the gate valve five (1321), the gate valve six (1322), the circulating pump three (5), and the circulating pump five (12) are closed.

Images