A dual-source dual-effect heat pump unit operation control method and system

Abstract

The present application discloses a dual-source dual-effect heat pump unit operation control method and system, which relates to the field of heat pump control technology; the method includes: establishing a TRNSYS model of a dual-source dual-effect heat pump unit; based on the environmental information of the current operation cycle and the TRNSYS model, determining the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand, and obtaining gain demand information; based on the first heat supply information and the gain demand information, configuring the operation control strategy of the ASHP unit and the GSHP unit in the execution unit; based on the operation control strategy, configuring the operation parameters of the ASHP unit and the GSHP unit. The technical solution provided by the present application can improve the stability and reliability of the operation of the dual-source heat pump unit.

Description

Technical Field

[0001] The present application relates to the technical field of heat pump control, and specifically to an operation control method and system for a dual-source dual-effect heat pump unit. Background Art

[0002] The heat pump unit is designed to absorb heat or cold energy from a heat source based on the reverse Carnot cycle principle, and release the absorbed heat into the circulating water to achieve the effect of heating or cooling the circulating water; while the dual-source heat pump is a heat pump technology that introduces two heat sources. It can use either air or water as a heat source, and achieve different temperature control targets by switching different heat sources. However, the dual-source heat pumps of the prior art, when using air and water sources as heat sources, often switch to a certain heat source according to climate characteristics. For example, in summer, the dual-source heat pump generally switches to water source mode, and in winter, it switches to air source mode. However, the dual-source heat pump unit essentially still uses a single heat source for heating or cooling, resulting in low stability and reliability of the heat pump unit.

[0003] Therefore, how to improve the stability and reliability of the operation of dual-source heat pump units is an urgent problem to be solved. Summary of the invention

[0004] The purpose of the present application is to provide a dual-source dual-effect heat pump unit operation control method and system to solve the problems raised in the above background technology.

[0005] The technical solution of the embodiment of the present application is implemented as follows:

[0006] The embodiment of the present application provides an operation control method of a dual-source double-effect heat pump unit, wherein the dual-source double-effect heat pump unit includes a ground source heat pump (GSHP) unit, an air source heat pump (ASHP) unit, and a user-side terminal device; the method includes:

[0007] Establishing a transient system simulation program (TRNSYS) model of a dual-source double-effect heat pump unit; the TRNSYS model includes an ASHP sub-model, a GSHP sub-model and a terminal equipment sub-model;

[0008] Based on the environmental information of the current operation cycle and the TRNSYS model, the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand is determined to obtain gain demand information; the gain demand information represents the water inlet temperature control demand of the ASHP unit;

[0009] Based on the first heat supply information and the gain requirement information, configuring the operation control strategy of the ASHP unit and the GSHP unit in the execution unit; the first heat supply information represents the heat supply capacity of the ASHP unit;

[0010] Based on the operation control strategy, the operation parameters of the ASHP unit and the GSHP unit are configured.

[0011] In the above scheme, the environmental information includes temperature information. The difference between the heat supply capacity of the ASHP unit and the actual heat supply demand is determined based on the environmental information of the current operation cycle and the TRNSYS model to obtain the gain demand information, including:

[0012] Determine the heat supply capacity of the ASHP based on the temperature information of the current operation cycle and the ASHP sub-model, and obtain first heat supply information;

[0013] Based on the temperature information of the current operation cycle and the terminal device sub-model, determining the heat demand information of the user-side terminal device; the heat demand information represents the heat required by the terminal device for heating or cooling in the current operation cycle;

[0014] Based on the first heat supply information and the heat supply demand, the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand is determined to obtain gain demand information; the gain demand information represents the water inlet temperature control demand of the ASHP unit.

[0015] In the above scheme, the temperature information includes temperature values ​​of multiple time nodes in the current operation cycle; the heat supply capacity of ASHP is determined based on the temperature information of the current operation cycle and the ASHP sub-model to obtain the first heat supply information, including:

[0016] Based on the temperature information of the current operation cycle, the heat supply capacity of the ASHP at each time node in the current operation cycle is determined using the TASHP sub-model;

[0017] Based on the heat supply capacity of each time node in the current operation cycle, the heat supply curve of ASHP in the current operation cycle is constructed;

[0018] Based on the heat supply curve, a first heat supply is determined.

[0019] In the above scheme, the heat supply capacity of ASHP at each time node in the current operation cycle is determined by using the TASHP sub-model based on the temperature information of the current operation cycle, including:

[0020] Based on a Coefficient Of Performance (COP) curve, determining the optimal COP of ASHP at each time node in the current operation cycle; the COP curve is determined based on the optimal COP of ASHP under different temperature conditions;

[0021] Based on the optimal COP at each time node, determine the ideal supply capacity of the ASHP unit corresponding to the optimal COP at the corresponding time node;

[0022] The ideal supply capacity is used as the heat supply capacity of ASHP at the corresponding time node.

[0023] In the above solution, the heat demand information of the user-side terminal device is determined based on the temperature information of the current operation cycle and the terminal device sub-model, including:

[0024] Based on the temperature information of the current operation cycle, the heat supply demand of the user-side terminal device at each time node in the current operation cycle is determined by using the terminal device sub-model;

[0025] Based on the heat supply demand at each time node in the current operation cycle, the heat demand curve of ASHP in the current operation cycle is constructed;

[0026] Based on the heat demand curve, the heat demand information of the user-side terminal device is determined.

[0027] In the above scheme, the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand is determined based on the first heat supply information and the heat supply demand to obtain the gain demand information, including:

[0028] Based on the heat supply curve and the heat demand curve, determining the difference between the heat supply and the heat demand at each time node in the current operation cycle to obtain supply and demand difference information;

[0029] Gain requirement information is determined based on the supply-demand difference information.

[0030] In the above scheme, the operation control strategy of the ASHP unit and the GSHP unit in the execution unit is configured based on the first heat supply information and the gain requirement information, including:

[0031] Based on the gain requirement information, determining whether the gain requirement matches the supply capacity of the GSHP unit;

[0032] When the gain requirement matches the supply capacity of the GSHP unit, configuring the ASHP control strategy based on the first heat supply information, and configuring the GSHP control strategy based on the gain requirement information;

[0033] When the gain demand does not match the supply capacity of the GSHP unit, the GSHP control strategy is configured based on the second heat supply information, and the temperature control target of the ASHP unit is determined based on the second heat supply information, and the ASHP control strategy is configured based on the temperature control target; the second heat supply information represents the heat supply capacity of the GSHP unit; wherein,

[0034] The configuring of the ASHP control strategy includes configuring the operating parameters of the ASHP unit, and the configuring of the GSHP control strategy includes configuring the operating parameters of the GSHP unit.

[0035] In the above scheme, the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand is determined based on the environmental information of the current operation cycle and the TRNSYS model to obtain gain demand information; before the gain demand information represents the water inlet temperature control demand of the ASHP unit, the method also includes:

[0036] Acquire ground source indicator data; the ground source indicators include ground source water temperature and ground source water level;

[0037] Based on the ground source indicator data, it is determined whether there is any abnormality in the ground source environment. If there is no abnormality in the ground source environment, based on the environmental information of the current operation cycle and the TRNSYS model, the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand is determined to obtain the gain demand information; the gain demand information represents the water inlet temperature control demand of the ASHP unit.

[0038] In the above scheme, the ground source environmental anomaly includes at least one of thermal pollution, thermal balance anomaly and groundwater level anomaly.

[0039] The embodiment of the present application also provides a double-source double-effect heat pump unit operation control system, the system includes a double-source double-effect heat pump unit and a control unit; the control end of the control unit is connected to the controlled end of the double-source double-effect heat pump unit; the double-source double-effect heat pump unit includes a GSHP unit, an ASHP unit and a user-side terminal device;

[0040] The GSHP unit includes a first heat exchanger and a circulating water pump on the groundwater source side; the inlet of the first heat exchanger is connected to the groundwater source outlet through the groundwater source side inlet pipe, the outlet of the first heat exchanger is connected to the groundwater source return port through the groundwater source side outlet pipe, and the circulating water pump on the groundwater source side is arranged on the groundwater source side outlet pipe; the first heat exchanger is used to reduce the temperature of the air entering the ASHP;

[0041] The ASHP unit comprises a second heat exchanger, a fan, a throttling element, a third heat exchanger, a user-side circulating water pump and a compressor; the fan is arranged on one side of the second heat exchanger and is used to introduce the air cooled by the first heat exchanger into the second heat exchanger; the second heat exchanger and the third heat exchanger are connected through a Freon circulation pipeline, the throttling element is arranged between the outlet of the second heat exchanger and the inlet of the third heat exchanger, and the compressor is arranged between the outlet of the third heat exchanger and the reflux port of the second heat exchanger; the user-side outlet of the third heat exchanger is connected to the user-side terminal device inlet through the user-side outlet pipe, the user-side terminal device outlet is connected to the user-side inlet of the third heat exchanger through the user-side inlet pipe, and the user-side circulating water pump is arranged on the user-side inlet pipe;

[0042] The control unit is used to establish a TRNSYS model of a dual-source dual-effect heat pump unit; the TRNSYS model includes an ASHP sub-model, a GSHP sub-model and a terminal device sub-model; based on the environmental information of the current operation cycle and the TRNSYS model, the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand is determined to obtain gain demand information; the gain demand information represents the water inlet temperature control demand of the ASHP unit; based on the first heat supply information and the gain demand information, the operation control strategy of the ASHP unit and the GSHP unit in the execution unit is configured; the first heat supply information represents the heat supply capacity of the ASHP unit; based on the operation control strategy, the operation parameters of the ASHP unit and the GSHP unit are configured.

[0043] The dual-source dual-effect heat pump unit operation control method and system provided in the embodiment of the present application utilizes groundwater as the water source of the dual-source heat pump unit, and utilizes the TRNSYS model to determine the energy supply targets of the air source and the water source, and controls the water source and the air source to operate jointly according to the energy supply target, thereby realizing the precise allocation and execution of energy supply tasks, and improving the accuracy and reliability of the heating and cooling results of the heat pump unit; at the same time, since the heating and cooling are realized by the combined operation of two heat sources, compared with the single heat source energy supply method, the operation stability of the entire heat pump unit is improved, thereby further improving the heating and cooling The results are stable and reliable; at the same time, by establishing a TRNSYS model including a heat pump and terminal equipment, the temperature control requirements of the terminal equipment can be predicted, thereby deriving a specific heat supply plan. Compared with the direct configuration plan, the matching degree between the operation control strategy and the external energy supply demand is improved, and precise energy supply is achieved, thereby improving the accuracy of the dual-source heat pump unit. Compared with the method of adjusting the control strategy in real time according to the external environment, since precise energy supply can be performed without frequently adjusting the equipment operating parameters, the operation stability and reliability of the dual-source heat pump unit can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A schematic diagram of the structure of a dual-source dual-effect heat pump unit operation control system provided in an embodiment of the present application;

[0045] Figure 2 A schematic flow chart of a dual-source dual-effect heat pump unit operation control method provided in an embodiment of the present application;

[0046] Figure 3 It is a flow chart of establishing a TRNSYS model of a double-source double-effect heat pump unit in the operation control method of a double-source double-effect heat pump unit in an embodiment of the present application;

[0047] Figure 4 A schematic diagram of a flow chart for determining gain requirement information in a dual-source dual-effect heat pump unit operation control method according to an embodiment of the present application;

[0048] Figure 5 It is a flow chart of the operation control strategy of configuring the ASHP unit and the GSHP unit in the operation control method of the dual-source dual-effect heat pump unit according to the embodiment of the present application.

[0049] Description of main component symbols:

[0050] 1-water inlet pipe on the groundwater source side; 2-first heat exchanger; 3-second heat exchanger; 4-fan; 5-Freon circulation pipeline; 6-throttling element; 7-third heat exchanger; 8-water outlet pipe on the use side; 9-terminal equipment on the use side; 10-circulating water pump on the use side; 11-water inlet pipe on the use side; 12-compressor; 13-water outlet pipe on the groundwater source side; 14-circulating water pump on the groundwater source side; 15-groundwater source. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0052] With the promotion of coal-to-electricity conversion, the application of ASHP is becoming more and more popular. The premise of using ASHP for heating / cooling is that the external environment temperature has sufficient heat exchange capacity. However, in the winter when the temperature is low, the heat capture capacity in the air is low and cannot provide sufficient heating energy, thus affecting the cooling efficiency of ASHP. At the same time, the surface temperature of the finned heat exchanger used for heat exchange is very easy to frost when it is too low, causing the heating efficiency to be further reduced; and in the summer when the temperature is high, the cold source capture capacity in the air is reduced and cannot provide sufficient cooling energy, thus affecting the cooling efficiency of ASHP.

[0053] In order to solve the above problems, the concept of dual-source dual-effect heat pump (also called dual-source effect heat pump) is introduced in the relevant technology, that is, the heat pump unit has two heat sources at the same time, and switches different heat sources according to the operating environment. However, when introducing water as the heat source of the dual-source heat pump unit, it is often necessary to use a water storage device to store energy first, which has a high equipment cost. When not switched to the water source mode, the water source in the water storage device needs to store energy all the time, which greatly increases the storage cost. In addition, the use of a single heat source may result in insufficient heat supply. Although electric energy can be used to assist heating or cooling, this method consumes a lot of resources. At the same time, due to the long operating time of the heat pump unit, the single heat source equipment itself may have abnormal conditions such as equipment failure, resulting in the heat pump unit that relies on a single heat source having low stability and reliability. Furthermore, since the heat supply capacity of the heat source is closely related to the external environment, in view of the volatility of the external environment, the heat pump unit has a large number of application scenarios with different situations, and the single heat source function mode has low flexibility. Therefore, the application scenarios that can be adapted have great limitations, which further reduces the stability and reliability of the heating and cooling results of the heat pump unit.

[0054] Based on this, in various embodiments of the present application, by using the groundwater source as the water source of the dual-source heat pump unit, and using the TRNSYS model to determine the energy supply targets of the air source and the water source, by controlling the joint operation of the water source and the air source according to the energy supply target, the accurate allocation and execution of the energy supply task is achieved, and the accuracy and reliability of the heating and cooling results of the heat pump unit are improved; at the same time, since the heating and cooling are achieved by the joint operation of two heat sources, compared with the single heat source energy supply method, the operation stability of the entire heat pump unit is improved, thereby further improving the stability and reliability of the heating and cooling results; at the same time, by establishing a TRNSYS model including a heat pump and a terminal device, the temperature control demand of the terminal device can be predicted, thereby deriving a specific heat supply plan, and compared with the direct configuration plan, the matching degree of the operation control strategy with the external energy supply demand is improved, and accurate energy supply is achieved, thereby improving the accuracy of the dual-source heat pump unit, and compared with the method of adjusting the control strategy in real time according to the external environment, since accurate energy supply can be performed without frequently adjusting the equipment operation parameters, the operation stability and reliability of the dual-source heat pump unit can be improved.

[0055] The embodiment of the present application provides a dual-source dual-effect heat pump unit operation control system, the system comprising a dual-source dual-effect heat pump unit and a control unit; the control end of the control unit is connected to the controlled end of the dual-source dual-effect heat pump unit; Figure 1 As shown, the dual-source dual-effect heat pump unit includes a GSHP unit, an ASHP unit and a user-side terminal device 9;

[0056] The GSHP unit includes a first heat exchanger 2 and a groundwater source side circulating water pump 14; the inlet of the first heat exchanger 2 is connected to the outlet of the groundwater source 15 through the groundwater source side water inlet pipe 1, the outlet of the first heat exchanger 2 is connected to the return port of the groundwater source 15 through the groundwater source side water outlet pipe 13, and the groundwater source side circulating water pump 14 is arranged on the groundwater source side water outlet pipe 13; the first heat exchanger 2 is used to reduce the temperature of the air entering the ASHP;

[0057] The ASHP unit comprises a second heat exchanger 3, a fan 4, a throttling element 6, a third heat exchanger 7, a user-side circulating water pump 10 and a compressor 12; the fan 4 is arranged on one side of the second heat exchanger 3 and is used to introduce the air cooled by the first heat exchanger 2 into the second heat exchanger 3; the second heat exchanger 3 and the third heat exchanger 7 are connected through a Freon circulation pipeline 5, the throttling element is arranged between the outlet of the second heat exchanger 3 and the inlet of the third heat exchanger 7, and the compressor 12 is arranged between the outlet of the third heat exchanger 7 and the reflux port of the second heat exchanger 3; the user-side outlet of the third heat exchanger 7 is connected to the inlet of the user-side terminal device 9 through the user-side outlet pipe 8, the outlet of the user-side terminal device 9 is connected to the user-side inlet of the third heat exchanger 7 through the user-side inlet pipe 11, and the user-side circulating water pump 10 is arranged on the user-side inlet pipe 11;

[0058] The control unit is used to establish a TRNSYS model of a dual-source dual-effect heat pump unit; the TRNSYS model includes an ASHP sub-model, a GSHP sub-model and a terminal device sub-model; based on the environmental information of the current operation cycle and the TRNSYS model, the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand is determined to obtain gain demand information; the gain demand information represents the water inlet temperature control demand of the ASHP unit; based on the first heat supply information and the gain demand information, the operation control strategy of the ASHP unit and the GSHP unit in the execution unit is configured; the first heat supply information represents the heat supply capacity of the ASHP unit; based on the operation control strategy, the operation parameters of the ASHP unit and the GSHP unit are configured.

[0059] In actual application, the first heat exchanger 2 and the second heat exchanger 3 can be finned heat exchangers, and the third heat exchanger 7 can be a plate heat exchanger or a shell and tube heat exchanger; the first heat exchanger 2 can also be called a water-air finned heat exchanger, the second heat exchanger 3 can also be called a Freon-air finned heat exchanger, and the third heat exchanger 7 can also be called a water-Freon heat exchanger. The embodiment of the present application does not limit this, as long as its function can be achieved.

[0060] In actual application, when heating in winter / cooling in summer, the circulating water temperature of the underground water source 15 is higher / lower than the air temperature on the atmospheric side. Under the action of the circulating water pump 14 on the underground water source side, the water of the high / low energy source is circulated to the first heat exchanger 2. The first heat exchanger 2 and the second heat exchanger 3 can be placed closely. Under the action of the fan 4, the air first passes through the first heat exchanger 2 for heat exchange, thereby increasing the temperature of the air entering the second heat exchanger 3 during heating / reducing the temperature during cooling. The air with the increased / reduced temperature then passes through the second heat exchanger 3 for heat exchange. According to the reverse Carnot cycle principle, the heat pump heating / cooling cycle is completed by the compressor 12, the Freon circulation pipeline 5, the third heat exchanger 7, the throttling element 6, the second heat exchanger 3 and other components, and finally the water temperature in the third heat exchanger 7 is increased / reduced. Driven by the side circulating water pump 10, the high / low temperature water circulates to the side terminal device 9, thereby achieving the purpose of heating / cooling the room on the user side.

[0061] Here, compared with the ordinary ASHP unit, because the air temperature entering the second heat exchanger 3 is increased / lowered in advance, the heating / cooling system is preheated / precooled in advance, thereby improving the energy efficiency under heating / cooling conditions; in addition, during winter heating, compared with heating with a single air source, since the first heat exchanger 2 is preheated using a water source with a higher temperature than the outdoor atmosphere, the surface temperature of the fins of the first heat exchanger 2 can be increased, thereby reducing the risk of frost on the heat exchanger, thereby further improving the energy efficiency of the heating condition; thirdly, by taking water from the ground source and recharging the heat-exchanged water into the ground, the water level stability and thermal balance of the underground energy can be maintained, thereby ensuring the safety and stability of the underground resource environment.

[0062] Exemplarily, the startup sequence of the heat pump unit is: first start the circulating water pump 14 on the groundwater source side and the circulating water pump 10 on the user side, then start the fan 4, and finally start the compressor 12;

[0063] The shutdown sequence of the unit is: first shut down the compressor 12, then shut down the fan 4, and finally shut down the circulating water pump 14 on the groundwater source side and the circulating water pump 10 on the user side.

[0064] It should be pointed out that the parts required for the heat pump unit in the embodiment of the present application are all common parts on the market, and there are no special parts; the process operation processes mainly include: copper pipe brazing, fin punching / tube threading / tube expansion of fin-type heat exchanger, mechanical parts assembly, electronic control parts panel and assembly, evacuation and filling of Freon system, etc. The above process processes are existing mature technologies and will not be repeated here.

[0065] Based on the above dual-source dual-effect heat pump unit operation control system architecture, the present application embodiment also provides a dual-source dual-effect heat pump unit operation control method, such as Figure 2 As shown, the method may include:

[0066] Step 201: Establishing a TRNSYS model of a dual-source dual-effect heat pump unit; the TRNSYS model includes an ASHP sub-model, a GSHP sub-model and a terminal equipment sub-model;

[0067] Step 202: Based on the environmental information of the current operation cycle and the TRNSYS model, determine the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand, and obtain gain demand information; the gain demand information represents the water inlet temperature control demand of the ASHP unit;

[0068] Step 203: Based on the first heat supply information and the gain requirement information, configure the operation control strategy of the ASHP unit and the GSHP unit in the execution unit; the first heat supply information represents the heat supply capacity of the ASHP unit;

[0069] Step 204: Based on the operation control strategy, configure the operation parameters of the ASHP unit and the GSHP unit.

[0070] In practical application, such as Figure 3 As shown, the specific process of establishing the TRNSYS model of the double-source double-effect heat pump unit may include the following steps:

[0071] Step 301: define heat pump unit system components;

[0072] Specifically, the specification parameters of each component in the ASHP unit, GSHP unit and user-side terminal equipment are defined according to the actual system data or drawings, and they are connected to form a complete dual-source double-effect heat pump unit;

[0073] For example, the specification parameters of heat exchangers, circulation pipelines and other components in ASHP units and GSHP units are defined, and the specification parameters of fan coil units, radiation panels and other components in the user-side terminal equipment are defined;

[0074] Step 302: Establishing a building model; that is, establishing a building model of the functional place of the user-side terminal equipment;

[0075] Specifically, use the Type 5 (building model) or Type 144 (detailed building model) building model in TRNSYS; input the building's geometric dimensions, material properties, window parameters, internal heat load and other information;

[0076] Step 303: setting heat pump model parameters, including setting parameters of the ASHP model and the GSHP model;

[0077] ASHP model: Use Type 6 (heat pump model) or other types applicable to ASHP, and enter its performance parameters such as COP, rated power, etc. according to the technical specifications of ASHP.

[0078] GSHP model: Use Type 6 or other suitable types to input the performance parameters of GSHP; if the performance of ground heat exchanger needs to be considered, use Type 148 (ground heat exchanger model) to simulate the underground heat exchange process;

[0079] Step 304: define the user-side terminal device parameters;

[0080] Specifically, use types such as Type 11 (fan coil) or Type 12 (radiant floor) to define terminal devices, and define parameters such as flow rate and temperature control strategy;

[0081] Step 305: Setting up a heat exchanger and a hydraulic system;

[0082] Define heat exchangers using Type 2 (tank) or other types of heat exchanger models;

[0083] Use Type 1 (pipes) and Type 4 (pumps) to simulate hydraulic systems and ensure the correct distribution of water flow;

[0084] Step 306: define control logic;

[0085] Specifically, use Type 16 (controller) or Type 18 (PID controller) to define the control logic of the system; for example, set under what conditions to start ASHP or GSHP, how to switch the heat pump according to outdoor temperature or indoor temperature demand, etc.

[0086] Step 307: Connect components;

[0087] Specifically, connect all components in TRNSYS to form a closed-loop system; ensure that the connections between each component are correct;

[0088] Step 308: Optimizing the model;

[0089] Load historical meteorological data files (such as TMY3 files) to simulate system performance under different weather conditions, and optimize and adjust the TRNSYS model based on the output results of the TRNSYS model and the actual operating parameters of the heat pump system corresponding to the historical meteorological data.

[0090] In practical applications, the ASHP unit can be used as a priority heat source, and then the heat information required for GSHP unit gain can be determined based on the heat difference between the ASHP energy supply capacity and the actual energy supply demand.

[0091] Based on this, in one embodiment, the environmental information includes temperature information, such as Figure 4As shown, the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand is determined based on the environmental information of the current operation cycle and the TRNSYS model to obtain the gain demand information; which may include:

[0092] Step 401: determining the heat supply capacity of the ASHP based on the temperature information of the current operation cycle and the ASHP sub-model, and obtaining first heat supply information;

[0093] Step 402: Based on the temperature information of the current operation cycle and the terminal device sub-model, determine the heat demand information of the user-side terminal device; the heat demand information represents the heat required by the terminal device when performing heating or cooling in the current operation cycle;

[0094] Step 403: Based on the first heat supply information and the heat supply demand, determine the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand to obtain gain demand information; the gain demand information represents the water inlet temperature control demand of the ASHP unit.

[0095] In practical applications, each year can be divided into multiple operating cycles according to climate factors. Here, the operating cycles can be divided according to historical meteorological data. Specifically, the historical meteorological data can be clustered and analyzed, and continuous time periods with similar climates can be taken as an operating cycle.

[0096] In actual application, after determining the operating cycle, the temperature information of multiple time nodes contained in the current operating cycle can be predicted based on the historical data of the corresponding operating cycle; after determining the temperature information of each time node, the predicted temperature change curve of the current operating cycle can be constructed based on the temperature information of each time node.

[0097] In one embodiment, the temperature information includes temperature values ​​of multiple time nodes in the current operation cycle; and determining the heat supply capacity of the ASHP based on the temperature information of the current operation cycle and the ASHP sub-model may include:

[0098] Based on the temperature information of the current operation cycle, the heat supply capacity of the ASHP at each time node in the current operation cycle is determined using the TASHP sub-model;

[0099] Based on the heat supply capacity of each time node in the current operation cycle, the heat supply curve of ASHP in the current operation cycle is constructed;

[0100] Based on the heat supply curve, a first heat supply is determined.

[0101] In actual application, when the TASHP sub-model is used to determine the heat supply capacity of ASHP at each time node in the current operation cycle, the temperature value of each time node in the current operation cycle can be determined according to the predicted temperature change curve, and the temperature value can be input into the ASHP sub-model of the TRNSYS model to obtain the heat supply value of the corresponding time node.

[0102] Here, in order to ensure the energy efficiency of ASHP, the corresponding heat supply, that is, the heat supply capacity, can be determined according to the optimal COP of the ASHP unit under different temperature conditions. On the basis of ensuring the optimal energy efficiency of ASHP, the gain supply of GSHP can be supplemented to improve the overall energy efficiency of the heat pump system.

[0103] Based on this, in one embodiment, the determining of the heat supply capacity of ASHP at each time node in the current operation cycle by using the TASHP sub-model based on the temperature information of the current operation cycle may include:

[0104] Based on the COP curve, determining the optimal COP of ASHP at each time node in the current operation cycle; the COP curve is determined based on the optimal COP of ASHP under different temperature conditions;

[0105] Based on the optimal COP at each time node, determine the ideal supply capacity of the ASHP unit corresponding to the optimal COP at the corresponding time node;

[0106] The ideal supply capacity is used as the heat supply capacity of ASHP at the corresponding time node.

[0107] In practical applications, the TRNSYS model can be used to construct a COP curve. Specifically, under the same temperature conditions, the operating parameters of each component of the ASHP unit in the TRNSYS model can be adjusted to achieve different heating / cooling capacities, and the COP corresponding to different heating / heating capacities can be calculated to obtain the optimal COP under the temperature conditions.

[0108] In practical applications, when determining the optimal COP of ASHP at each time node in the current operating cycle, the predicted temperature of each time node can be determined in the predicted temperature change curve, and based on the predicted temperature, the optimal COP corresponding to the predicted temperature can be determined from the COP curve; after determining the optimal COP, the energy supplied when the optimal COP is reached is reversely calculated based on the optimal COP, which is the ideal supply capacity at the current time node; the parameters of each component of the ASHP unit are configured according to the ideal supply capacity so that the energy it supplies matches the ideal supply capacity.

[0109] In one embodiment, the determining the heat demand information of the user-side terminal device based on the temperature information of the current operation cycle and the terminal device sub-model may include:

[0110] Based on the temperature information of the current operation cycle, the heat supply demand of the user-side terminal device at each time node in the current operation cycle is determined by using the terminal device sub-model;

[0111] Based on the heat supply demand at each time node in the current operation cycle, the heat demand curve of ASHP in the current operation cycle is constructed;

[0112] Based on the heat demand curve, the heat demand information of the user-side terminal device is determined.

[0113] In actual application, when the terminal device sub-model is used to determine the heat supply demand of the user-side terminal device at each time node in the current operating cycle, the temperature value of each time node in the current operating cycle can be determined according to the predicted temperature change curve, and the temperature value can be input into the terminal device sub-model of the TRNSYS model, thereby outputting the energy supply demand of the terminal device at the corresponding time node.

[0114] In one embodiment, determining the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand based on the first heat supply information and the heat supply demand to obtain the gain demand information includes:

[0115] Based on the heat supply curve and the heat demand curve, determining the difference between the heat supply and the heat demand at each time node in the current operation cycle to obtain supply and demand difference information;

[0116] Gain requirement information is determined based on the supply-demand difference information.

[0117] In actual application, the gain requirement information can represent the numerical value of the water inlet temperature of the ASHP unit that needs to be regulated. Specifically, the gain requirement information can represent the numerical value by which the outlet water temperature of the second heat exchanger needs to be increased / decreased. After determining the energy gain requirement at each time node, the numerical value by which the water inlet temperature of the ASHP unit needs to be increased / decreased can be calculated, thereby determining the energy that the first heat exchanger needs to provide to achieve this goal.

[0118] Based on this, in one embodiment, determining gain requirement information based on the supply-demand difference information may include:

[0119] Determine the heat difference at each time node in the current operation cycle based on the difference between the heat supply and the heat demand at each time node in the current operation cycle;

[0120] Based on the heat difference at each time node, determine the value that needs to be adjusted for the ASHP unit water inlet temperature at the corresponding time node, and obtain the temperature difference curve;

[0121] Gain requirement information is determined based on the temperature difference curve.

[0122] Exemplarily, based on the heat difference at each time node, determining the value of the ASHP unit water inlet temperature that needs to be adjusted at the corresponding time node includes the following steps:

[0123] Step 1: Calculate the temperature difference corresponding to the heat difference; the calculation formula is as follows:

[0124] ;

[0125] in, represents the temperature difference, Represents the heat difference, represents the water mass flow rate, Represents the specific heat capacity of water.

[0126] In actual application, after determining the gain requirement information, the TRNSYS model can be used to determine the heat that the first heat exchanger needs to provide. Specifically, in the TRNSYS model, when simulating not turning on the GSHP unit sub-model, the temperature information of the current external environment is input to obtain the outlet water temperature of the second heat exchanger as the initial outlet water temperature. In the TRNSYS model, the GSHP unit sub-model is turned on, the temperature of the current groundwater source is input, and then the parameters of each component in the GSHP unit sub-model are adjusted, and the actual outlet water temperature of the second heat exchanger is obtained. The difference between the actual outlet water temperature and the initial outlet water temperature is calculated, and when the difference matches the energy gain requirement, the corresponding GSHP unit component operating parameter configuration data is recorded, and the GSHP unit heat supply capacity corresponding to the parameter configuration data is recorded, that is, the energy that the first heat exchanger needs to provide.

[0127] Based on this, configuring the operation control strategy of the ASHP unit and the GSHP unit in the execution unit based on the first heat supply information and the gain requirement information may include:

[0128] Based on the gain requirement information, determining a heat supply target of the GSHP unit at a corresponding time node;

[0129] Based on the heat supply target of the GSHP unit and the heat supply capacity of the ASHP at the corresponding time node, the operation control strategy of the ASHP unit and the GSHP unit in the execution unit is configured.

[0130] In practical applications, the heat supply capacity of ASHP at the corresponding time node can be understood as the heat supply target of the ASHP unit at the corresponding time node.

[0131] In actual application, the operation control strategy of the GSHP unit can be determined according to the heat supply target of the GSHP unit at each time node, and the operation control strategy of the ASHP unit can be configured according to the heat supply capacity of the ASHP at each time node; when determining the operation control strategy of each heat pump unit, a set of fixed configuration parameters can be determined according to the mean of the heat supply target at all times, or multiple sets of fluctuating configuration parameters can be configured according to the changing characteristics of the heat supply target of the corresponding unit during the operation cycle. The specific configuration method belongs to the mature technology in the field and is not limited to the embodiments of the present application.

[0132] In actual application, the energy gain determined based on the optimal COP of ASHP may exceed the supply capacity of GSHP. In this case, the operating parameters of ASHP unit can be adjusted according to the actual supply capacity of GSHP to ensure that the energy supply can be carried out stably and reliably.

[0133] Based on this, in one embodiment, if Figure 5 As shown, configuring the operation control strategy of the ASHP unit and the GSHP unit in the execution unit based on the first heat supply information and the gain requirement information may include:

[0134] Step 501: Based on the gain requirement information, determine whether the gain requirement matches the supply capacity of the GSHP unit;

[0135] Step 502: When the gain requirement matches the supply capacity of the GSHP unit, configuring the ASHP control strategy based on the first heat supply information, and configuring the GSHP control strategy based on the gain requirement information;

[0136] Step 503: When the gain demand does not match the supply capacity of the GSHP unit, the GSHP control strategy is configured based on the second heat supply information, and the temperature control target of the ASHP unit is determined based on the second heat supply information, and the ASHP control strategy is configured based on the temperature control target; the second heat supply information represents the heat supply capacity of the GSHP unit; wherein,

[0137] The configuring of the ASHP control strategy includes configuring the operating parameters of the ASHP unit, and the configuring of the GSHP control strategy includes configuring the operating parameters of the GSHP unit.

[0138] In actual application, based on the gain demand information, it is judged whether the gain demand matches the supply capacity of the GSHP unit. It can be understood that based on the gain demand information, the heat supply target of the GSHP unit at the corresponding time node is determined, and then the heat supply target is judged whether it is lower than the maximum supply capacity of the GSHP. When it is lower than the maximum supply capacity, it means that the GSHP unit can meet the functional requirements, and the control strategy of the GSHP can be directly configured according to the heat supply target; otherwise, the maximum supply capacity of the GSHP unit needs to be used as the energy supply target, and the GSHP control strategy is configured according to the maximum supply capacity of the GSHP; at the same time, it is necessary to determine the control value of the ASHP inlet water temperature according to the maximum supply capacity of the GSHP, and adjust the configuration parameters of each component of the ASHP unit according to the control value to ensure that the energy finally supplied by the ASHP unit can meet the use requirements of the terminal equipment on the user side. Here, although the COP of ASHP is not the optimal COP, it can ensure the normal and accurate operation of the temperature control function, achieve the balance of heat supply between ASHP and GSHP, and ensure the stable and reliable operation of the entire dual-source double-effect heat pump unit.

[0139] In actual application, the maximum supply capacity of the GSHP unit can be determined according to the temperature of the groundwater source and the performance parameters of each component of the GSHP unit.

[0140] In actual application, the GSHP control strategy is configured based on the gain demand information, that is, based on the gain demand information, the heat supply target of the GSHP unit at the corresponding time node is determined, and then the GSHP control strategy is configured according to the heat supply target.

[0141] In actual application, in order to avoid impact on the underground environment and ensure the balance of the natural environment, the underground environment conditions may be assessed before executing step 202 .

[0142] Based on this, in one embodiment, the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand is determined based on the environmental information of the current operation cycle and the TRNSYS model to obtain gain demand information; before the gain demand information represents the water inlet temperature control demand of the ASHP unit, the method further includes:

[0143] Acquire ground source indicator data; the ground source indicators include ground source water temperature and ground source water level;

[0144] Based on the ground source indicator data, it is determined whether there is any abnormality in the ground source environment. If there is no abnormality in the ground source environment, based on the environmental information of the current operation cycle and the TRNSYS model, the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand is determined to obtain the gain demand information; the gain demand information represents the water inlet temperature control demand of the ASHP unit.

[0145] In one embodiment, the geo-source environmental anomaly includes at least one of thermal pollution, thermal balance anomaly and groundwater level anomaly.

[0146] Exemplarily, if the ground source water temperature is higher than the ground source water temperature upper limit threshold, it indicates that thermal pollution has occurred; if the ground source water temperature is lower than the ground source water temperature lower limit threshold, it indicates that the thermal balance has been destroyed.

[0147] In summary, the dual-source dual-effect heat pump unit operation control method provided in the embodiment of the present application utilizes groundwater as the water source of the dual-source heat pump unit, and uses the TRNSYS model to determine the energy supply targets of the air source and the water source, and controls the water source and the air source to jointly operate according to the energy supply target, thereby realizing the precise allocation and execution of energy supply tasks, and improving the accuracy and reliability of the heating and cooling results of the heat pump unit; at the same time, since the heating and cooling are realized by the combined operation of two heat sources, compared with the single heat source energy supply method, the operation stability of the entire heat pump unit is improved, thereby further improving the heating and cooling The results are stable and reliable; at the same time, by establishing a TRNSYS model including a heat pump and terminal equipment, the temperature control requirements of the terminal equipment can be predicted, thereby deriving a specific heat supply plan. Compared with the direct configuration plan, the matching degree between the operation control strategy and the external energy supply demand is improved, and precise energy supply is achieved, thereby improving the accuracy of the dual-source heat pump unit. Compared with the method of adjusting the control strategy in real time according to the external environment, since precise energy supply can be performed without frequently adjusting the equipment operating parameters, the operation stability and reliability of the dual-source heat pump unit can be improved.

[0148] It should be noted that: the dual-source dual-effect heat pump unit operation control system provided in the above embodiment only uses the division of the above program modules as an example when performing control. In actual applications, the above processing can be assigned to different program modules as needed, that is, the internal structure of the device is divided into different program modules to complete all or part of the processing described above. In addition, the dual-source dual-effect heat pump unit operation control system provided in the above embodiment and the dual-source dual-effect heat pump unit operation control method embodiment belong to the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0149] It should be noted that: "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0150] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0151] The above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application.

Claims

1. A dual-source double-effect heat pump unit operation control method, characterized in that: The dual-source dual-effect heat pump unit comprises a ground source heat pump GSHP unit, an air source heat pump ASHP unit and a user-side terminal device; the method comprises: Establishing a transient system simulation program TRNSYS model of a dual-source double-effect heat pump unit; the TRNSYS model includes an ASHP sub-model, a GSHP sub-model and a terminal equipment sub-model; Based on the environmental information of the current operation cycle and the TRNSYS model, the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand is determined to obtain gain demand information; the gain demand information represents the water inlet temperature control demand of the ASHP unit; Based on the first heat supply information and the gain requirement information, configuring the operation control strategy of the ASHP unit and the GSHP unit in the execution unit; the first heat supply information represents the heat supply capacity of the ASHP unit; Based on the operation control strategy, the operation parameters of the ASHP unit and the GSHP unit are configured; wherein, The step of configuring the operation control strategy of the ASHP unit and the GSHP unit in the execution unit based on the first heat supply information and the gain requirement information includes: Based on the gain requirement information, determining whether the gain requirement matches the supply capacity of the GSHP unit; When the gain requirement matches the supply capacity of the GSHP unit, configuring the ASHP control strategy based on the first heat supply information, and configuring the GSHP control strategy based on the gain requirement information; When the gain demand does not match the supply capacity of the GSHP unit, the GSHP control strategy is configured based on the second heat supply information, and the temperature control target of the ASHP unit is determined based on the second heat supply information, and the ASHP control strategy is configured based on the temperature control target; the second heat supply information represents the heat supply capacity of the GSHP unit; wherein, The configuring of the ASHP control strategy includes configuring the operating parameters of the ASHP unit, and the configuring of the GSHP control strategy includes configuring the operating parameters of the GSHP unit.

2. The method according to claim 1, characterized in that The environmental information includes temperature information. The difference between the heat supply capacity of the ASHP unit and the actual heat supply demand is determined based on the environmental information of the current operation cycle and the TRNSYS model to obtain the gain demand information, including: Determine the heat supply capacity of the ASHP based on the temperature information of the current operation cycle and the ASHP sub-model, and obtain first heat supply information; Based on the temperature information of the current operation cycle and the terminal device sub-model, determining the heat demand information of the user-side terminal device; the heat demand information represents the heat required by the terminal device for heating or cooling in the current operation cycle; Based on the first heat supply information and the heat supply demand, the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand is determined to obtain gain demand information; the gain demand information represents the water inlet temperature control demand of the ASHP unit.

3. The method according to claim 2, characterized in that The temperature information includes temperature values ​​at multiple time nodes in the current operation cycle; The step of determining the heat supply capacity of the ASHP based on the temperature information of the current operation cycle and the ASHP sub-model to obtain the first heat supply information includes: Based on the temperature information of the current operation cycle, the heat supply capacity of the ASHP at each time node in the current operation cycle is determined using the ASHP sub-model; Based on the heat supply capacity of each time node in the current operation cycle, the heat supply curve of ASHP in the current operation cycle is constructed; Based on the heat supply curve, first heat supply information is determined.

4. The method according to claim 3, characterized in that The method of determining the heat supply capacity of the ASHP at each time node in the current operation cycle by using the ASHP sub-model based on the temperature information of the current operation cycle includes: Based on the energy efficiency ratio COP curve, determine the optimal COP of ASHP at each time node in the current operation cycle; the COP curve is determined based on the optimal COP of ASHP under different temperature conditions; Based on the optimal COP at each time node, determine the ideal supply capacity of the ASHP unit corresponding to the optimal COP at the corresponding time node; The ideal supply capacity is used as the heat supply capacity of ASHP at the corresponding time node.

5. The method according to claim 3, characterized in that: The step of determining the heat demand information of the user-side terminal device based on the temperature information of the current operation cycle and the terminal device sub-model includes: Based on the temperature information of the current operation cycle, the heat supply demand of the user-side terminal device at each time node in the current operation cycle is determined by using the terminal device sub-model; Based on the heat supply demand at each time node in the current operation cycle, the heat demand curve of ASHP in the current operation cycle is constructed; Based on the heat demand curve, the heat demand information of the user-side terminal device is determined.

6. The method according to claim 5, characterized in that The determining, based on the first heat supply information and the heat supply demand, the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand to obtain the gain demand information includes: Based on the heat supply curve and the heat demand curve, determining the difference between the heat supply and the heat demand at each time node in the current operation cycle to obtain supply and demand difference information; Gain requirement information is determined based on the supply-demand difference information.

7. The method according to any one of claims 1 to 6, characterized in that The environmental information based on the current operation cycle and the TRNSYS model determine the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand to obtain the gain demand information; Before the gain requirement information represents the inlet water temperature control requirement of the ASHP unit, the method further includes: Acquire ground source indicator data; the ground source indicators include ground source water temperature and ground source water level; Based on the ground source indicator data, it is determined whether there is any abnormality in the ground source environment. If there is no abnormality in the ground source environment, based on the environmental information of the current operation cycle and the TRNSYS model, the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand is determined to obtain the gain demand information; the gain demand information represents the water inlet temperature control demand of the ASHP unit.

8. The method according to claim 7, characterized in that The ground source environmental anomaly includes at least one of thermal pollution, thermal balance anomaly and groundwater level anomaly.

9. A dual-source double-effect heat pump unit operation control system, characterized in that: The system includes a double-source double-effect heat pump unit and a control unit; the control end of the control unit is connected to the controlled end of the double-source double-effect heat pump unit; the double-source double-effect heat pump unit includes a GSHP unit, an ASHP unit and a user-side terminal device; The GSHP unit comprises a first heat exchanger and a circulating water pump on the groundwater source side; the inlet of the first heat exchanger is connected to the groundwater source outlet through the groundwater source side water inlet pipe, the outlet of the first heat exchanger is connected to the groundwater source return port through the groundwater source side water outlet pipe, and the circulating water pump on the groundwater source side is arranged on the groundwater source side water outlet pipe; the first heat exchanger is used to reduce the temperature of the air entering the ASHP unit; The ASHP unit comprises a second heat exchanger, a fan, a throttling element, a third heat exchanger, a use-side circulating water pump and a compressor; the fan is arranged on one side of the second heat exchanger and is used to introduce the air cooled by the first heat exchanger into the second heat exchanger; the second heat exchanger and the third heat exchanger are connected through a Freon circulation pipeline, the throttling element is arranged between the outlet of the second heat exchanger and the inlet of the third heat exchanger, and the compressor is arranged between the outlet of the third heat exchanger and the reflux port of the second heat exchanger; the use-side outlet of the third heat exchanger is connected to the inlet of the terminal device on the use side through the use-side outlet pipe, the outlet of the terminal device on the use side is connected to the inlet of the third heat exchanger on the use side through the use-side inlet pipe, and the use-side circulating water pump is arranged on the use-side inlet pipe; The control unit is used to establish a TRNSYS model of a dual-source dual-effect heat pump unit; the TRNSYS model includes an ASHP sub-model, a GSHP sub-model and a terminal device sub-model; based on the environmental information of the current operation cycle and the TRNSYS model, the difference between the heat supply capacity of the ASHP unit and the actual heat supply demand is determined to obtain gain demand information; the gain demand information represents the water inlet temperature control demand of the ASHP unit; based on the first heat supply information and the gain demand information, the operation control strategy of the ASHP unit and the GSHP unit in the execution unit is configured; the first heat supply information represents the heat supply capacity of the ASHP unit; based on the operation control strategy, the operation parameters of the ASHP unit and the GSHP unit are configured; wherein, The step of configuring the operation control strategy of the ASHP unit and the GSHP unit in the execution unit based on the first heat supply information and the gain requirement information includes: Based on the gain requirement information, determining whether the gain requirement matches the supply capacity of the GSHP unit; When the gain requirement matches the supply capacity of the GSHP unit, configuring the ASHP control strategy based on the first heat supply information, and configuring the GSHP control strategy based on the gain requirement information; When the gain demand does not match the supply capacity of the GSHP unit, the GSHP control strategy is configured based on the second heat supply information, and the temperature control target of the ASHP unit is determined based on the second heat supply information, and the ASHP control strategy is configured based on the temperature control target; the second heat supply information represents the heat supply capacity of the GSHP unit; wherein, The configuring of the ASHP control strategy includes configuring the operating parameters of the ASHP unit, and the configuring of the GSHP control strategy includes configuring the operating parameters of the GSHP unit.

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