Load distribution method and system for shallow geothermal coupling radiation cooling system

Abstract

The invention belongs to the technical field of ground source heat pumps and radiation air conditioners, particularly relates to a load distribution method and system for a shallow geothermal coupling radiation cooling system, and aims to solve the problem of unreasonable configuration of system equipment by constructing a supply side subsystem performance relational expression for cooperative operation of supply side subsystems. Meanwhile, deep utilization of low-temperature cold water in a fresh air unit and accurate supply of high-temperature cold water in a radiation unit are achieved by constructing a demand side subsystem performance relational expression, adopting a gradient utilization mechanism and optimizing a cold and heat transmission and distribution path or adopting a grading function strategy; the problems of load distribution, system equipment capacity configuration and operation adjustment of the shallow geothermal coupling radiation cooling system are solved; energy level matching of the supply side subsystem and the demand side subsystem is guided, so that energy waste caused by energy level mismatching is eliminated fundamentally, and systematic guidance is provided for engineering application of the technology.

Description

Technical Field

[0001] The present invention belongs to the technical fields of ground source heat pumps and radiant air conditioning, and particularly relates to a load distribution method and system for a shallow geothermal coupled radiant cooling system. Background Technique

[0002] In the field of building energy consumption and carbon emissions, according to the data of the "Research Report on China's Building Energy Consumption and Carbon Emissions (2023)", in 2021, China's building energy consumption accounted for 36.3% of the total national energy consumption, and carbon emissions accounted for 38.2% of the total national carbon emissions. Among them, building operation energy consumption accounted for 21.9% of the total national energy consumption and 60.4% of the whole-process building energy consumption, highlighting the importance of building energy conservation and consumption reduction.

[0003] In hot summer and cold winter regions, due to climate conditions, most towns lack centralized municipal heating facilities, and decentralized heat sources such as air source heat pumps, electric heating equipment, and small stoves are mainly used for winter heating. The heating efficiency of air source heat pumps is affected by environmental factors and it is difficult to provide stable and continuous heating; electric heating equipment and small stoves have high energy consumption, low heating efficiency, and there are problems of environmental pollution and harm to human health. The ground source heat pump system is widely used in the field of building heating and cooling in China due to its advantages of high efficiency, environmental protection, energy conservation, and economy, and has great potential for energy development. However, during the operation of this system, soil temperature changes may cause soil thermal imbalance problems. In hot summer and cold winter regions, the cooling time in summer is long. If only relying on a single ground source heat pump system for cooling and heating, it will lead to soil heat accumulation. Long-term use will not only affect the system performance, but may also damage the soil environment. Therefore, at present, a composite ground source heat pump system assisted by a cooling tower is mostly used to solve this problem. The form of the air-conditioning terminal has a significant impact on the winter and summer loads, and the winter and summer loads are the main factors affecting the soil thermal balance of the ground source heat pump system. The performance of traditional convection air conditioners is affected by outdoor weather, and there are obvious wind sensations and noises during use, which affect the comfort of specific groups of people (such as children and the elderly). The radiant air conditioning system has the advantages of saving space, low energy consumption, and quiet operation, and can create a better indoor thermal comfort environment.

[0004] Such as Figure 1As shown in the figure, the supply-side subsystem includes a cooling tower unit and a ground heat exchanger unit. The cooling tower unit dissipates heat through air convection, and the ground heat exchanger unit relies on soil heat conduction. The difference in their working mechanisms makes it difficult to quantitatively evaluate the comprehensive performance of the system, lacking a scientific basis for equipment selection and matching, and leading to an imbalance in energy efficiency matching. The demand-side subsystem includes two sets, namely a fresh air unit and a radiation unit. The fresh air unit requires deep dehumidification with 7°C low-temperature chilled water, and the radiation unit relies on 18 - 20°C high-temperature chilled water for comfortable cooling. In the current system operation, the supply-side subsystem uniformly outputs 7°C high-quality low-temperature chilled water. As the low-grade cold energy demand side, the radiation unit could directly accept 18 - 20°C high-temperature chilled water under the design conditions, but it needs to mix 7°C chilled water with the return water through a plate heat exchanger to raise the temperature to 18 - 20°C. This process causes the high-grade cold energy generated by the heat pump unit to be forced to degrade to low-grade cold energy, and the irreversible heat transfer of the plate heat exchanger results in the ineffective dissipation of high-exergy cold energy, forming an energy efficiency waste of "using high-grade energy at a low energy level". The shallow geothermal energy fails to achieve "energy supply on demand and cascaded utilization" during the conversion process, resulting in a significant reduction in the comprehensive performance of the system due to the unreasonable degradation of energy quality. Summary of the Invention

[0005] The present invention aims to provide a load distribution method and system for a shallow geothermal energy-coupled radiant cooling system. By constructing a performance relationship formula for the supply-side subsystem for coordinated operation, the problem of unreasonable system equipment configuration is solved; at the same time, by constructing a performance relationship formula for the demand-side subsystem and adopting a cascaded utilization mechanism, through optimizing the cold and heat transmission and distribution path or adopting a hierarchical function strategy, the deep utilization of low-temperature chilled water in the fresh air unit and the precise supply of high-temperature chilled water in the radiation unit are realized, solving the load distribution, system equipment capacity configuration, and operation regulation problems of the shallow geothermal energy-coupled radiant cooling system; by guiding the energy level matching of the supply-side subsystem and the demand-side subsystem, the energy waste caused by energy level mismatch is fundamentally eliminated, thus providing systematic guidance for the engineering application of this technology.

[0006] A load distribution method for a shallow geothermal energy-coupled radiant cooling system includes: Obtaining the meteorological parameters and basic design parameters of the region where the target building is located; Based on the meteorological parameters and basic design parameters of the region where the target building is located, calculating the annual dynamic load of the target building, and designing the system equipment capacity based on the annual dynamic load of the target building, and constructing a three-dimensional system model; the system includes a supply-side subsystem and a demand-side subsystem, the supply-side subsystem includes a cooling tower unit and a ground heat exchanger unit, and the demand-side subsystem includes a fresh air unit and a radiation unit; Based on different cooling load ratios and evaporation temperatures in the supply - side subsystem, simulate the operation of the supply - side subsystem, calculate the comprehensive cooling coefficient of the supply - side subsystem, construct the performance relationship of the supply - side subsystem, determine the maximum cooling coefficient and its corresponding cooling load ratio, and perform long - term simulation to correct the performance relationship of the supply - side subsystem; Based on different condensation temperatures in the demand - side subsystem, simulate the operation of the demand - side subsystem, calculate and determine the performance coefficient of the demand - side subsystem, and construct the performance relationship of the demand - side subsystem; Combine the performance relationship of the supply - side subsystem and the performance relationship of the demand - side subsystem to determine the optimal system operating conditions, and formulate a load distribution plan based on the optimal system operating conditions.

[0007] By constructing the performance relationship of the supply - side subsystem for collaborative operation of the supply - side subsystem, to solve the problem of unreasonable system equipment configuration; at the same time, by constructing the performance relationship of the demand - side subsystem, adopting a cascade utilization mechanism, through optimizing the cold - heat transmission and distribution path or adopting a hierarchical function strategy, to achieve the deep utilization of low - temperature chilled water in the fresh - air unit and the precise supply of high - temperature chilled water in the radiation unit, and solve the load distribution, system equipment capacity configuration and operation regulation problems of the shallow geothermal coupled radiant cooling system; by guiding the energy level matching of the supply - side subsystem and the demand - side subsystem, fundamentally eliminate the energy waste caused by energy level mismatch, so as to provide systematic guidance for the engineering application of this technology.

[0008] Furthermore, the step of based on different cooling load ratios and evaporation temperatures in the supply - side subsystem, simulate the operation of the supply - side subsystem, calculate the comprehensive cooling coefficient of the supply - side subsystem, construct the performance relationship of the supply - side subsystem, determine the maximum cooling coefficient and its corresponding cooling load ratio, and perform long - term simulation to correct the performance relationship of the supply - side subsystem includes: Based on the supply - side subsystem, given different cooling load ratios and evaporation temperatures borne by the cooling tower units, simulate the operation of the supply - side subsystem during the cooling season, and calculate the hourly comprehensive cooling coefficient and the average comprehensive cooling coefficient of the supply - side subsystem during the cooling season; Based on the cooling load ratio, evaporation temperature, condensation temperature borne by the cooling tower unit and the average comprehensive cooling coefficient of the supply - side subsystem during the cooling season, construct the performance relationship of the supply - side subsystem; Based on the performance relationship of the supply - side subsystem, determine the maximum value of the average comprehensive cooling coefficient of the supply - side subsystem during the cooling season, and obtain the corresponding cooling load ratio borne by the cooling tower unit based on the maximum value of the average comprehensive cooling coefficient of the supply - side subsystem during the cooling season; Based on the corresponding cooling load ratio borne by the cooling tower unit obtained from the maximum value of the corrected average comprehensive cooling coefficient of the supply - side subsystem during the cooling season, use the supply - side subsystem for long - term simulation operation to obtain the soil temperature rise situation, and correct the performance relationship of the supply - side subsystem.

[0009] Furthermore, based on different condensation temperatures in the demand-side subsystem, simulate the operation of the demand-side subsystem, calculate and determine the performance coefficient of the demand-side subsystem, and construct a performance relationship formula for the demand-side subsystem, including: Based on the demand-side subsystem, given different condensation temperatures, simulate the operation of the demand-side subsystem and calculate the performance parameters of the demand-side subsystem; the performance parameters of the demand-side subsystem include the cooling supply ratio of the radiation unit, the sensible heat cooling supply ratio of the radiation unit, the comprehensive cooling supply coefficient of the demand-side subsystem, and the average comprehensive cooling supply coefficient of the demand-side subsystem; Based on the sensible heat cooling supply ratio of the radiation unit under the maximum system exergy efficiency, determine the cooling supply ratio of the radiation unit at the given condensation temperature and its corresponding average comprehensive cooling supply coefficient of the demand-side subsystem; Based on the cooling supply ratio of the radiation unit, evaporation temperature, condensation temperature, and the average comprehensive cooling supply coefficient of the demand-side subsystem determined under the maximum system exergy efficiency, construct a performance relationship formula for the demand-side subsystem.

[0010] Furthermore, combine the modified performance relationship formula of the supply-side subsystem and the performance relationship formula of the demand-side subsystem to determine the optimal system operating conditions, and formulate a load distribution plan based on the optimal system operating conditions, including: Combine the modified performance relationship formula of the supply-side subsystem and the performance relationship formula of the demand-side subsystem to determine the system operating conditions when the average comprehensive cooling supply coefficient of the demand-side subsystem is at its maximum, and obtain the condensation temperature, evaporation temperature, and the proportion of the cooling load borne by the fresh air unit; Based on the condensation temperature and evaporation temperature, determine the system operating conditions when the average comprehensive cooling supply coefficient of the supply-side subsystem is at its maximum, and obtain the proportion of the cooling load borne by the cooling tower unit; Combine the proportion of the cooling load borne by the fresh air unit and the proportion of the cooling load borne by the cooling tower unit to determine the system load distribution plan.

[0011] Furthermore, combine the proportion of the cooling load borne by the fresh air unit and the proportion of the cooling load borne by the cooling tower unit to determine the system load distribution plan, including: When the proportion of the cooling load borne by the fresh air unit is less than the proportion of the cooling load borne by the cooling tower unit, the cooling capacity provided by the cooling tower unit is the sum of the cooling capacity required by the fresh air unit and the cooling capacity required by part of the radiation units; When the proportion of the cooling load borne by the fresh air unit is equal to the proportion of the cooling load borne by the cooling tower unit, the cooling capacity provided by the cooling tower unit is equal to the cooling capacity required by the fresh air unit; When the proportion of the cooling load borne by the fresh air unit is greater than the proportion of the cooling load borne by the cooling tower unit, the cooling capacity provided by the cooling tower unit is the difference between the cooling capacity required by the fresh air unit and the cooling capacity provided by part of the underground heat exchanger units.

[0012] Further, when the cooling load ratio borne by the fresh air unit is less than that borne by the cooling tower unit, the calculation expression for the cooling capacity provided by the cooling tower unit is: ; In the formula, represents the cooling capacity provided by the cooling tower unit; represents the cooling capacity required by the fresh air unit; represents the cooling load ratio borne by the cooling tower unit; represents the cooling load ratio borne by the fresh air unit, and its expression is , represents the cooling load ratio borne by the radiation unit; represents the cooling capacity required by the radiation unit; When the cooling load ratio borne by the fresh air unit is greater than that borne by the cooling tower unit, the calculation expression for the cooling capacity provided by the cooling tower unit is: ; In the formula, represents the cooling capacity provided by the ground heat exchanger unit.

[0013] Further, the three-dimensional system model is constructed using TRNSYS software.

[0014] A system for the load distribution method of a shallow geothermal coupled radiant cooling system includes: A parameter acquisition module, which is used to acquire the meteorological parameters and basic design parameters of the area where the target building is located; A model construction module, which is used to calculate the annual dynamic load of the target building based on the meteorological parameters and basic design parameters of the area where the target building is located, design the system equipment capacity based on the annual dynamic load of the target building, and construct a three-dimensional system model; the system includes a supply-side subsystem and a demand-side subsystem, the supply-side subsystem includes a cooling tower unit and a ground heat exchanger unit, and the demand-side subsystem includes a fresh air unit and a radiation unit; A supply-side performance calculation module, which is used to simulate the operation of the supply-side subsystem based on different cooling load ratios and evaporation temperatures in the supply-side subsystem, calculate the comprehensive cooling coefficient of the supply-side subsystem, construct a supply-side subsystem performance relationship, determine the maximum cooling coefficient and its corresponding cooling load ratio, and perform long-term simulation to correct the supply-side subsystem performance relationship; A demand-side performance calculation module, which is used to simulate the operation of the demand-side subsystem based on different condensation temperatures in the demand-side subsystem, calculate and determine the performance coefficient of the demand-side subsystem, and construct a demand-side subsystem performance relationship; A load distribution module, which is used to combine the supply-side subsystem performance relationship and the demand-side subsystem performance relationship to determine the optimal system operating condition, and formulate a load distribution plan based on the optimal system operating condition.

[0015] An electronic device, the electronic device includes a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, the above-mentioned method is implemented.

[0016] A computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the above-mentioned method is implemented.

[0017] The beneficial effects of the present invention are as follows: The present invention solves the problem of unreasonable system equipment configuration by constructing a performance relationship formula of the supply-side subsystem for collaborative operation of the supply-side subsystem; at the same time, by constructing a performance relationship formula of the demand-side subsystem, adopting a cascaded utilization mechanism, and optimizing the cold and heat transmission and distribution paths or adopting a hierarchical function strategy, the deep utilization of low-temperature chilled water in the fresh air unit and the precise supply of high-temperature chilled water in the radiation unit are realized, and the load distribution, system equipment capacity configuration and operation regulation problems of the shallow geothermal coupling radiation cooling system are solved; by guiding the energy level matching of the supply-side subsystem and the demand-side subsystem, the energy waste caused by energy level mismatch is fundamentally eliminated, thereby providing systematic guidance for the engineering application of this technology. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of a shallow geothermal energy coupling radiation cooling system; Figure 2 It is a flow chart of the present invention; Figure 3 It is a schematic diagram of the performance relationship of the supply-side subsystem under the cold load ratio borne by different cooling tower units and the evaporation temperature; Figure 4 It is a schematic diagram of the modified performance relationship of the supply-side subsystem under the cold load ratio borne by different cooling tower units and the evaporation temperature; Figure 5 It is a schematic diagram of the normalization process of the relationship between the sensible heat ratio of the radiation unit and the exergy efficiency of the system; Figure 6 It is a schematic diagram of the performance relationship of the demand-side subsystem under different sensible heat cooling ratios of the radiation unit, condensation temperature, and cooling ratio of the radiation unit; Figure 7 It is a schematic diagram of the system structure of the present invention; Figure 8 It is a schematic diagram of the structure of a computer device.

[0019] Reference Signs: 1. Supply-side subsystem; 11. Cooling tower unit; 111. Cooling tower; 12. Underground heat exchanger unit; 121. Underground heat exchanger; 13. Heat pump unit 2. Demand-side subsystem; 21. Fresh air unit; 22. Radiation unit; 221. Radiation module; 222. Plate heat exchanger; 31. Memory; 32. Processor. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] It should be noted that the following describes various aspects of the embodiments within the scope of the appended claims. It should be obvious that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on this disclosure, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, this device and / or practice this method can be implemented using other structures and / or functions in addition to one or more of the aspects described herein.

[0022] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0023] Embodiment 1 Figure 2 Shown is a load distribution method for a shallow geothermal coupled radiation cooling and heating system. By constructing a performance relationship formula of the supply-side subsystem 1 that operates in coordination, the problem of unreasonable system equipment configuration is solved; at the same time, by constructing a performance relationship formula of the demand-side subsystem 2 and adopting a cascade utilization mechanism, through optimizing the cold and heat transmission and distribution path or adopting a hierarchical function strategy, the deep utilization of low-temperature chilled water in the fresh air unit 21 and the precise supply of high-temperature chilled water in the radiation unit 22 are realized, and the load distribution, system equipment capacity configuration and operation regulation problems of the shallow geothermal coupled radiation cooling and heating system are solved; by guiding the energy level matching of the supply-side subsystem 1 and the demand-side subsystem 2, the energy waste caused by energy level mismatch is fundamentally eliminated, thereby providing systematic guidance for the engineering application of this technology. The specific steps are as follows: S1: Obtain the meteorological parameters and basic design parameters of the area where the target building is located; S2: Based on the meteorological parameters and basic design parameters of the area where the target building is located, calculate the annual dynamic load of the target building, design the system equipment capacity based on the annual dynamic load of the target building, and construct a three-dimensional system model; In this embodiment, as Figure 1 shown, the system includes a supply-side subsystem 1 and a demand-side subsystem 2. The supply-side subsystem 1 includes a cooling tower unit 11 and an underground heat exchanger unit 12. The cooling tower unit 11 includes a cooling tower 111 and a heat pump unit 13. The underground heat exchanger unit 12 includes an underground heat exchanger 121 and a heat pump unit 13; the demand-side subsystem 2 includes a fresh air unit 21 and a radiation unit 22. The radiation unit 22 includes a radiation module 221 and a plate heat exchanger 222.

[0024] In this embodiment, the three-dimensional system model is constructed using TRNSYS software.

[0025] S3: Based on the different cooling load ratios and evaporation temperatures in the supply-side subsystem 1, simulate the operation of the supply-side subsystem 1, calculate the comprehensive cooling coefficient of the supply-side subsystem 1, construct the performance relationship formula of the supply-side subsystem 1, determine the maximum cooling coefficient and its corresponding cooling load ratio, and perform long-term simulation to correct the performance relationship formula of the supply-side subsystem 1; S31: Based on the supply-side subsystem 1, given different cooling load ratios and evaporation temperatures borne by the cooling tower unit 11, simulate the cooling season operation of the supply-side subsystem 1, and calculate the hourly comprehensive cooling coefficient and the average comprehensive cooling coefficient of the supply-side subsystem 1 during the cooling season; Among them, the expression of the hourly comprehensive cooling coefficient of the supply-side subsystem 1 is: ; In the formula, represents the hourly comprehensive cooling coefficient of the supply-side subsystem 1; represents the total refrigerating capacity of the supply-side subsystem 1, with the unit of kW; represents the total power consumption of the supply-side subsystem 1, with the unit of kW; Among them, the expression of the average comprehensive cooling coefficient of the supply-side subsystem 1 during the cooling season is: ; In the formula, represents the average comprehensive cooling coefficient of the supply-side subsystem 1 during the cooling season; represents the number of hours; S32: Based on the cooling load ratio borne by the cooling tower unit 11, evaporation temperature, condensation temperature, and the average comprehensive cooling coefficient of the supply-side subsystem 1 during the cooling season, construct the performance relationship formula of the supply-side subsystem; In this embodiment, as Figure 3The following is a schematic diagram of statistically analyzing the simulation results based on the proportion of cooling load borne by the cooling tower unit 11, the evaporation temperature, the condensation temperature, and the average comprehensive cooling coefficient of the supply-side subsystem 1 during the cooling season, and constructing a performance relationship formula for the supply-side subsystem.

[0026] Among them, the expression of the performance relationship formula for the supply-side subsystem is: ; In the formula, represents the performance of the supply-side subsystem; represents the condensation temperature; represents the evaporation temperature; represents the proportion of the cooling load borne by the cooling tower unit 11; the fitting degree of the expression of the performance relationship formula for the supply-side subsystem is 0.952.

[0027] S33: Based on the performance relationship formula of the supply-side subsystem, determine the maximum value of the average comprehensive cooling coefficient of the supply-side subsystem 1 during the cooling season, and obtain the corresponding proportion of the cooling load borne by the cooling tower unit 11 based on the maximum value of the average comprehensive cooling coefficient of the supply-side subsystem 1; S34: Based on the corresponding proportion of the cooling load borne by the cooling tower unit 11 obtained from the maximum value of the average comprehensive cooling coefficient of the modified supply-side subsystem 1, perform long-term simulation operation using the supply-side subsystem 1 to obtain the soil temperature rise situation, and modify the performance relationship formula of the supply-side subsystem; In this embodiment, the long-term simulation operation time of the supply-side subsystem 1 in the TRNSYS software is 15 years, and the schematic diagram of the modified performance relationship of the supply-side subsystem under different proportions of the cooling load borne by the cooling tower unit 11 and evaporation temperatures is as shown in Figure 4 shown.

[0028] It should be noted that since the influence of the condensation temperature is relatively small, in this embodiment, the influence of the condensation temperature on the performance relationship formula of the supply-side subsystem is ignored, and the expression of the modified performance relationship formula of the supply-side subsystem is: ; In the formula, represents the modified performance of the supply-side subsystem; represents the condensation temperature; represents the evaporation temperature; represents the proportion of the cooling load borne by the cooling tower unit 11; the fitting degree of the expression of the modified performance relationship formula of the supply-side subsystem is 0.921.

[0029] S4: Based on different condensation temperatures in the demand-side subsystem 2, simulate the operation of the demand-side subsystem 2, calculate and determine the performance coefficient of the demand-side subsystem 2, and construct a performance relationship formula for the demand-side subsystem; S41: Based on the demand-side subsystem 2, given different condensation temperatures, simulate the operation of the demand-side subsystem 2, and calculate the performance parameters of the demand-side subsystem 2; In this embodiment, the performance parameters of the demand-side subsystem 2 include the cooling supply ratio of the radiation unit, the sensible heat cooling supply ratio of the radiation unit, the comprehensive cooling coefficient of the demand-side subsystem 2, and the average comprehensive cooling coefficient of the demand-side subsystem 2; Among them, the expression for the cooling supply ratio of the radiation unit is: ; In the formula, represents the proportion of the cooling load borne by the radiation unit 22; represents the cooling capacity of the demand-side subsystem 2, with the unit of kW; represents the total cooling capacity of the demand-side subsystem 2, with the unit of kW; Among them, the expression for the sensible heat cooling supply ratio of the radiation unit is: ; In the formula, represents the sensible heat cooling supply ratio of the radiation unit; represents the sensible heat cooling capacity of the demand-side subsystem 2, with the unit of kW; Among them, the expression for the comprehensive cooling coefficient of the demand-side subsystem 2 is: ; In the formula, represents the comprehensive cooling coefficient of the demand-side subsystem 2; represents the total power consumption of the demand-side subsystem 2, with the unit of kW; Among them, the expression for the average comprehensive cooling coefficient of the demand-side subsystem 2 is: ; In the formula, represents the average comprehensive cooling coefficient of the demand-side subsystem 2; S42: Based on the sensible heat cooling supply ratio of the radiation unit under the maximum system exergy efficiency, determine the cooling supply ratio of the radiation unit and its corresponding average comprehensive cooling coefficient of the demand-side subsystem 2 at the given condensation temperature; In this embodiment, based on the published paper "Research and Optimization on the Coupled Operation Characteristics of Buried Pipe Radiation Cooling / Heating System and Fresh Air System", combined with Figure 5 the conclusion shows that when the sensible heat cooling supply ratio of the radiation unit is 75%, the system exergy efficiency is the largest.

[0030] S43: Based on the cooling supply ratio of the radiation unit, evaporation temperature, condensation temperature, and the average comprehensive cooling coefficient of the demand-side subsystem 2 during the cooling season determined under the maximum system exergy efficiency, construct the performance relationship of the demand-side subsystem.

[0031] In this embodiment, as Figure 6 shown is a schematic diagram of the performance relationship of the demand-side subsystem 2 under different sensible cooling ratios of radiation units, condensation temperatures, and cooling ratios of radiation unit 22.

[0032] Among them, the expression of the performance relationship formula of the demand-side subsystem is: ; In the formula, represents the performance of the demand-side subsystem 2; the fitting degree of the expression of the performance relationship formula of the demand-side subsystem is 1.000.

[0033] S5: Combine the performance relationship formula of the supply-side subsystem and the performance relationship formula of the demand-side subsystem to determine the optimal system operating conditions, and formulate a load distribution plan based on the optimal system operating conditions; S51: Combine the modified performance relationship formula of the supply-side subsystem and the performance relationship formula of the demand-side subsystem to determine the system operating conditions when the average comprehensive cooling coefficient of the demand-side subsystem 2 is the maximum, and obtain the condensation temperature, evaporation temperature, and the proportion of the cooling load borne by the fresh air unit 21; S52: Based on the condensation temperature and evaporation temperature, determine the system operating conditions when the average comprehensive cooling coefficient of the supply-side subsystem 1 is the maximum, and obtain the proportion of the cooling load borne by the cooling tower unit 11; S53: Combine the proportion of the cooling load borne by the fresh air unit 21 and the proportion of the cooling load borne by the cooling tower unit 11 to determine the system load distribution plan.

[0034] S531: When the proportion of the cooling load borne by the fresh air unit 21 is less than the proportion of the cooling load borne by the cooling tower unit 11, the cooling capacity provided by the cooling tower unit 11 is the sum of the cooling capacity required by the fresh air unit 21 and the cooling capacity required by some of the radiation units 22; Among them, when the proportion of the cooling load borne by the fresh air unit 21 is less than the proportion of the cooling load borne by the cooling tower unit 11 , that is , the cooling capacity provided by the cooling tower unit 11 ; In the formula, represents the cooling capacity provided by the cooling tower unit 11; represents the cooling capacity required by the fresh air unit 21; represents the proportion of the cooling load borne by the cooling tower unit 11; represents the proportion of the cooling load borne by the fresh air unit 21, and its expression is , represents the proportion of the cooling load borne by the radiation unit 22; represents the cooling capacity required by the radiation unit 22; S532: When the proportion of the cooling load borne by the fresh air unit 21 is equal to the proportion of the cooling load borne by the cooling tower unit 11, the cooling capacity provided by the cooling tower unit 11 is equal to the cooling capacity required by the fresh air unit 21; Among them, when the proportion of the cooling load borne by the fresh air unit 21 is equal to the proportion of the cooling load borne by the cooling tower unit 11 , that is when, the calculation expression of the cooling capacity provided by the cooling tower unit 11 is: ; S533: When the proportion of the cooling load borne by the fresh air unit 21 is greater than the proportion of the cooling load borne by the cooling tower unit 11, the cooling capacity provided by the cooling tower unit 11 is the difference between the cooling capacity required by the fresh air unit and the cooling capacity provided by part of the ground heat exchanger unit 12.

[0035] Among them, when the proportion of the cooling load borne by the fresh air unit 21 [[ID=2l]]is greater than the proportion of the cooling load borne by the cooling tower unit 11 , that is when, the calculation expression of the cooling capacity provided by the cooling tower unit 11 is: ; In the formula, represents the cooling capacity provided by the ground heat exchanger unit 12.

[0036] In this embodiment, the proportion of the cooling load borne by the fresh air unit 21 is equal to the proportion of the cooling load borne by the cooling tower unit 11 , that is , then the obtained load distribution scheme is that the cooling tower unit 11 provides all the cooling capacity required by the fresh air unit 21, and the ground heat exchanger unit 12 provides all the cooling capacity required by the radiation unit 22.

[0037] It should be noted that based on the obtained load distribution scheme, the system form and equipment capacity of the actual system can be adjusted adaptively in combination with the actual economic situation of the system.

[0038] Embodiment 2 Based on the same technical concept, as Figure 7 shown, this embodiment also provides a load distribution system for a shallow geothermal coupled radiant cooling system, including a parameter acquisition module, a model construction module, a supply-side performance calculation module, a demand-side performance calculation module, and a load distribution module.

[0039] Specifically, the parameter acquisition module is used to acquire the meteorological parameters and basic design parameters of the area where the target building is located; Specifically, the model construction module is used to calculate the annual dynamic load of the target building based on the meteorological parameters and basic design parameters of the area where the target building is located, design the system equipment capacity based on the annual dynamic load of the target building, and construct a three-dimensional system model; the system includes a supply-side subsystem 1 and a demand-side subsystem 2, the supply-side subsystem 1 includes a cooling tower unit 11 and a ground heat exchanger unit 12, and the demand-side subsystem 2 includes a fresh air unit 21 and a radiation unit 22; Specifically, the supply-side performance calculation module is used to simulate the operation of the supply-side subsystem 1 based on different cooling load ratios and evaporation temperatures in the supply-side subsystem 1, calculate the comprehensive cooling coefficient of the supply-side subsystem 1, construct a performance relationship formula for the supply-side subsystem 1, determine the maximum cooling coefficient and its corresponding cooling load ratio, and perform long-term simulation to correct the performance relationship formula of the supply-side subsystem 1; Specifically, the demand-side performance calculation module is used to simulate the operation of the demand-side subsystem 2 based on different condensation temperatures in the demand-side subsystem 2, calculate and determine the performance coefficient of the demand-side subsystem 2, and construct a performance relationship formula for the demand-side subsystem 2; Specifically, the load distribution module is used to combine the performance relationship formula of the supply-side subsystem 1 and the performance relationship formula of the demand-side subsystem 2, determine the optimal system operating condition, and formulate a load distribution plan based on the optimal system operating condition.

[0040] Embodiment 3 Based on the same inventive concept, an embodiment of the present application further provides a computer device, including a memory 31 and a processor 32, as Figure 8 shown, the memory 31 stores a computer program, and when the processor 32 executes the computer program, it implements the method described in any one of the above.

[0041] Among them, the memory 31 includes at least one type of readable storage medium, and the readable storage medium includes flash memory, hard disk, multimedia card, card-type memory (such as SD or DX memory, etc.), magnetic memory, magnetic disk, optical disc, etc. The memory 31 can be an internal storage unit of the load distribution system of the shallow geothermal coupling radiant cooling system in some embodiments, such as a hard disk. The memory 31 can also be an external storage device of the load distribution system of the shallow geothermal coupling radiant cooling system in other embodiments, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. Further, the memory 31 can also include both an internal storage unit and an external storage device of the load distribution system of the shallow geothermal coupling radiant cooling system. The memory 31 can be used not only to store application software and various types of data installed in the load distribution system of the shallow geothermal coupling radiant cooling system, such as the code of the load distribution system program of the shallow geothermal coupling radiant cooling system, etc., but also to temporarily store data that has been output or will be output.

[0042] The processor 32 can be a central processing unit (CPU), a controller, a microcontroller, a microprocessor, or other data processing chips in some embodiments, and is used to run the program code stored in the memory 31 or process data, such as executing the load distribution system program of the shallow geothermal coupling radiant cooling system, etc.

[0043] The disclosed embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, and when the computer program is run by a processor, it executes the steps of the method described in the above method embodiments. Among them, the storage medium can be a volatile or non-volatile computer-readable storage medium.

[0044] The computer program product of the application page content refreshing method provided by the disclosed embodiments of the present invention includes a computer-readable storage medium storing program code, and the instructions included in the program code can be used to execute the steps of the method described in the above method embodiments. For details, please refer to the above method embodiments and will not be elaborated here.

[0045] The disclosed embodiments of the present invention also provide a computer program which, when executed by a processor, implements any of the methods in the foregoing embodiments. The computer program product can be specifically implemented in the form of hardware, software, or a combination thereof. In an alternative embodiment, the computer program product is specifically embodied as a computer storage medium. In another alternative embodiment, the computer program product is specifically embodied as a software product, such as a Software Development Kit (SDK), etc.

[0046] It can be understood that the same or similar parts in the above embodiments can be referred to each other, and the content not detailed in some embodiments can be found in the same or similar content in other embodiments.

[0047] It should be noted that in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "a plurality of" refers to at least two.

[0048] Any process or method description in a flowchart or described in other ways herein can be understood as representing a module, segment, or portion of code including one or more executable instructions for implementing a specific logical function or process. The scope of the preferred embodiments of the present invention includes additional implementations, where functions can be executed in a substantially simultaneous manner or in a reverse order according to the involved functions, rather than in the order shown or discussed, which should be understood by those skilled in the technical field of the embodiments of the present invention.

[0049] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, any one or a combination of the following well-known technologies in the art can be used: discrete logic circuits with logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits with appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0050] Those of ordinary skill in the technical field of the present invention can understand that all or part of the steps carried out to implement the methods in the above embodiments can be completed by instructing relevant hardware through a program. The program can be stored in a computer-readable storage medium, and when the program is executed, it includes one or a combination of the steps of the method embodiments.

[0051] In addition, in each embodiment of the present invention, each functional unit may be integrated into one processing module, or each unit may exist physically alone, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0052] The above-mentioned storage medium may be a read-only memory, a magnetic disk, an optical disk, or the like.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0054] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A load distribution method for a shallow geothermal coupled radiant cooling system, characterized in that Including: Obtain the meteorological parameters and basic design parameters of the area where the target building is located; Based on the meteorological parameters and basic design parameters of the area where the target building is located, calculate the annual dynamic load of the target building, and design the system equipment capacity based on the annual dynamic load of the target building, and construct a three-dimensional system model; the system includes a supply-side subsystem and a demand-side subsystem, the supply-side subsystem includes a cooling tower unit and a ground heat exchanger unit, and the demand-side subsystem includes a fresh air unit and a radiation unit; Based on the different cooling load ratios and evaporation temperatures in the supply-side subsystem, simulate the operation of the supply-side subsystem, calculate the comprehensive cooling coefficient of the supply-side subsystem, construct a performance relationship formula for the supply-side subsystem, determine the maximum cooling coefficient and its corresponding cooling load ratio, and perform long-term simulation to correct the performance relationship formula of the supply-side subsystem; Based on the different condensation temperatures in the demand-side subsystem, simulate the operation of the demand-side subsystem, calculate and determine the performance coefficient of the demand-side subsystem, and construct a performance relationship formula for the demand-side subsystem; Combine the performance relationship formula of the supply-side subsystem and the performance relationship formula of the demand-side subsystem to determine the optimal system operating condition, and formulate a load distribution plan based on the optimal system operating condition.

2. The load distribution method of a shallow geothermal coupled radiant cooling system according to claim 1, characterized in that The step of, based on the different cooling load ratios and evaporation temperatures in the supply-side subsystem, simulating the operation of the supply-side subsystem, calculating the comprehensive cooling coefficient of the supply-side subsystem, constructing a performance relationship formula for the supply-side subsystem, determining the maximum cooling coefficient and its corresponding cooling load ratio, and performing long-term simulation to correct the performance relationship formula of the supply-side subsystem, includes: Based on the supply-side subsystem, given different cooling load ratios and evaporation temperatures borne by the cooling tower unit, simulate the operation of the supply-side subsystem during the cooling season, and calculate the hourly comprehensive cooling coefficient and the average comprehensive cooling coefficient of the supply-side subsystem during the cooling season; Based on the cooling load ratio, evaporation temperature, condensation temperature borne by the cooling tower unit and the average comprehensive cooling coefficient of the supply-side subsystem during the cooling season, construct a performance relationship formula for the supply-side subsystem; Based on the performance relationship formula of the supply-side subsystem, determine the maximum value of the average comprehensive cooling coefficient of the supply-side subsystem during the cooling season, and obtain the corresponding cooling load ratio borne by the cooling tower unit based on the maximum value of the average comprehensive cooling coefficient of the supply-side subsystem during the cooling season; Based on the corresponding cooling load ratio borne by the cooling tower unit obtained from the maximum value of the average comprehensive cooling coefficient of the corrected supply-side subsystem during the cooling season, perform long-term simulation operation using the supply-side subsystem to obtain the soil temperature rise situation, and correct the performance relationship formula of the supply-side subsystem.

3. A load distribution method for a shallow geothermal coupled radiant cooling system according to claim 1, characterized in that The step of, based on the different condensation temperatures in the demand-side subsystem, simulating the operation of the demand-side subsystem, calculating and determining the performance coefficient of the demand-side subsystem, and constructing a performance relationship formula for the demand-side subsystem, includes: Based on the demand-side subsystem, given different condensation temperatures, simulate the operation of the demand-side subsystem, and calculate the performance parameters of the demand-side subsystem; the performance parameters of the demand-side subsystem include the cooling supply ratio of the radiation unit, the sensible heat cooling supply ratio of the radiation unit, the comprehensive cooling coefficient of the demand-side subsystem, and the average comprehensive cooling coefficient of the demand-side subsystem; Based on the sensible cooling ratio of the radiation unit under the maximum system exergy efficiency, determine the cooling ratio of the radiation unit at a given condensation temperature and its corresponding average comprehensive cooling coefficient of the demand-side subsystem. Based on the cooling ratio of the radiation unit, evaporation temperature, condensation temperature, and the average comprehensive cooling coefficient of the demand-side subsystem determined under the maximum system exergy efficiency, construct the performance relationship of the demand-side subsystem.

4. A load distribution method for a shallow geothermal coupled radiant cooling system according to claims 2 and 3, characterized in that, Combining the modified performance relationship of the supply-side subsystem and the performance relationship of the demand-side subsystem, determine the optimal system operating conditions, and based on the optimal system operating conditions, formulate a load distribution plan, including: Combining the modified performance relationship of the supply-side subsystem and the performance relationship of the demand-side subsystem, determine the system operating conditions when the average comprehensive cooling coefficient of the demand-side subsystem is at its maximum value, and obtain the condensation temperature, evaporation temperature, and the proportion of the cooling load borne by the fresh air unit. Based on the condensation temperature and evaporation temperature, determine the system operating conditions when the average comprehensive cooling coefficient of the supply-side subsystem is at its maximum value, and obtain the proportion of the cooling load borne by the cooling tower unit. Combining the proportion of the cooling load borne by the fresh air unit and the proportion of the cooling load borne by the cooling tower unit, determine the system load distribution plan.

5. A load distribution method for a shallow geothermal coupled radiant cooling system according to claim 4, characterized in that, The combining the proportion of the cooling load borne by the fresh air unit and the proportion of the cooling load borne by the cooling tower unit to determine the system load distribution plan includes: When the proportion of the cooling load borne by the fresh air unit is less than the proportion of the cooling load borne by the cooling tower unit, the cooling capacity provided by the cooling tower unit is the sum of the cooling capacity required by the fresh air unit and the cooling capacity required by part of the radiation units. When the proportion of the cooling load borne by the fresh air unit is equal to the proportion of the cooling load borne by the cooling tower unit, the cooling capacity provided by the cooling tower unit is equal to the cooling capacity required by the fresh air unit. When the proportion of the cooling load borne by the fresh air unit is greater than the proportion of the cooling load borne by the cooling tower unit, the cooling capacity provided by the cooling tower unit is the difference between the cooling capacity required by the fresh air unit and the cooling capacity provided by part of the underground heat exchanger units.

6. The load distribution method of a shallow geothermal coupled radiation cooling system according to claim 5, characterized in that When the proportion of the cooling load borne by the fresh air unit is less than the proportion of the cooling load borne by the cooling tower unit, the calculation expression for the cooling capacity provided by the cooling tower unit is: ； In the formula, represents the cooling capacity provided by the cooling tower unit; represents the cooling capacity required by the fresh air unit; represents the proportion of the cooling load borne by the cooling tower unit; represents the proportion of the cooling load borne by the fresh air unit, and its expression is , represents the proportion of the cooling load borne by the radiation unit; represents the cooling capacity required by the radiation unit; When the proportion of the cooling load borne by the fresh air unit is greater than the proportion of the cooling load borne by the cooling tower unit, the calculation expression for the cooling capacity provided by the cooling tower unit is: ； In the formula, represents the cooling capacity provided by the underground heat exchanger unit.

7. A load distribution method for a shallow geothermal coupled radiant cooling system according to claim 1, characterized in that The three-dimensional system model is constructed using TRNSYS software.

8. A system for a load distribution method of the shallow geothermal coupled radiant cooling system according to claim 1, characterized in that, Including: A parameter acquisition module for acquiring the meteorological parameters and basic design parameters of the area where the target building is located. A model construction module for calculating the annual dynamic load of the target building based on the meteorological parameters and basic design parameters of the area where the target building is located, and designing the system equipment capacity based on the annual dynamic load of the target building, and constructing a three-dimensional system model; the system includes a supply-side subsystem and a demand-side subsystem, the supply-side subsystem includes a cooling tower unit and an underground heat exchanger unit, and the demand-side subsystem includes a fresh air unit and a radiation unit. A supply-side performance calculation module, which is used to simulate the operation of the supply-side subsystem based on different cooling load ratios and evaporation temperatures in the supply-side subsystem, calculate the comprehensive cooling coefficient of the supply-side subsystem, construct a performance relationship formula for the supply-side subsystem, determine the maximum cooling coefficient and its corresponding cooling load ratio, and perform long-term simulation to correct the performance relationship formula of the supply-side subsystem; A demand-side performance calculation module, which is used to simulate the operation of the demand-side subsystem based on different condensation temperatures in the demand-side subsystem, calculate and determine the performance coefficient of the demand-side subsystem, and construct a performance relationship formula for the demand-side subsystem; A load distribution module, which is used to combine the performance relationship formula of the supply-side subsystem and the performance relationship formula of the demand-side subsystem, determine the optimal system operating conditions, and formulate a load distribution plan based on the optimal system operating conditions.

9. An electronic device, characterized in that, The electronic device includes a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, the method described in any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, the method described in any one of claims 1 to 7 is implemented.

Images