Solar photovoltaic / photo-thermal and geothermal system performance evaluation method, system and medium

Abstract

The embodiment of the invention discloses a solar photovoltaic / photo-thermal and geothermal system performance evaluation method and system and a medium. The invention discloses a solar photovoltaic / photo-thermal and geothermal system performance evaluation method. The method comprises the following steps: acquiring an original temperature value and an operating temperature value of a soil core layer; the COP value of the ground source heat pump is determined according to the ratio of the output energy to the consumed electric energy of the ground source heat pump of the solar photovoltaic / photo-thermal and geothermal system; according to the difference value of the original temperature value and the operation temperature value and the COP value of the ground source heat pump, a COP temperature loss ratio index is determined; determining a system COP value according to the output energy and the system power consumption of the ground source heat pump of the solar photovoltaic / photo-thermal and geothermal system; a system COP temperature loss ratio index is determined according to the difference value of the original temperature value and the operation temperature value and the system COP value; the geothermal resource utilization efficiency of the ground source heat pump is evaluated according to the COP temperature loss ratio index, and the comprehensive performance of the system is evaluated according to the COP temperature loss ratio index of the system, so that the performance change in the operation process of the system is accurately reflected.

Description

Technical Field

[0001] This invention relates to the field of renewable energy system performance evaluation technology, and in particular to a method, system, medium and equipment for evaluating the performance of solar photovoltaic / photothermal and geothermal systems. Background Technology

[0002] With the global pursuit of zero-carbon emissions, the integrated application of multiple renewable energy sources in the building sector has become a research hotspot. Solar photovoltaic / solar thermal technologies can generate both electricity and heat simultaneously, while ground source heat pumps utilize shallow geothermal buildings to provide heating and cooling, and have been widely researched and applied. In existing technologies, composite systems combining solar photovoltaic / solar thermal and ground source heat pumps operate with solar-assisted geothermal systems, effectively reducing buried pipe length and improving the COP (coefficient of performance) index.

[0003] Existing technologies have shortcomings in system performance evaluation. Traditional COP indicators only reflect the instantaneous efficiency of heat pumps and cannot comprehensively improve the impact of temperature changes on overall energy efficiency in composite systems, nor do they fully consider the utilization rate of shallow thermal energy. Existing research focuses on the optimization of individual system components, but lacks dynamic evaluation tools for system performance, making it difficult for operating strategies to adapt to environmental changes and energy absorption during long-term operation. Summary of the Invention

[0004] Based on this, it is necessary to propose a performance evaluation method, system, medium, and equipment for solar photovoltaic / photothermal and geothermal systems to address the above problems.

[0005] A method for performance evaluation of a solar photovoltaic / solar thermal and geothermal system, wherein the solar photovoltaic / solar thermal and geothermal system includes an interconnected ground source heat pump, a solar collector, and a circulating pump, the method comprising:

[0006] The system monitors soil temperature changes during operation, collecting both the original and operating temperature values ​​of the soil core layer.

[0007] The COP value of the ground source heat pump under different connection modes is determined based on the ratio of the output energy to the consumed electrical energy of the ground source heat pump under different connection modes of solar photovoltaic / solar thermal and geothermal systems. The connection modes include systems without solar collectors and systems with solar collectors.

[0008] The COP temperature loss ratio index is determined based on the difference between the original temperature value and the operating temperature value at the same monitoring point in the same soil layer, and the COP value of the ground source heat pump.

[0009] The system COP value under different connection modes is determined based on the output energy of the ground source heat pump and the system power consumption of the solar photovoltaic / photothermal and geothermal systems under different connection modes.

[0010] The system COP temperature loss ratio index is determined based on the difference between the original temperature value and the operating temperature value at the same monitoring point in the same soil layer, and the system COP value.

[0011] The geothermal resource utilization efficiency of the ground source heat pump is evaluated based on the COP temperature loss ratio index, and the overall performance of the solar photovoltaic / photothermal and geothermal systems is evaluated based on the system COP temperature loss ratio index.

[0012] Specifically, determining the COP temperature loss ratio index based on the ratio of the difference between the original temperature value and the operating temperature value at the same monitoring point in the same soil layer to the COP value of the ground source heat pump includes:

[0013] according to Determine the COP (Coefficient of Performance) temperature loss ratio index, where 'a' represents the current connection mode of the solar photovoltaic / photothermal and geothermal systems, 'COPTLR' represents the COP temperature loss ratio caused by system operation (i.e., the COP temperature loss ratio index), 'N' represents the number of soil layers, and 'T' represents the temperature loss rate. oi，j，k Let T be the original temperature of the monitoring point located in the j-th row and k-th column of soil layer i. ai，j，k Let COP be the operating temperature of the monitoring point located in the j-th row and k-th column of soil layer i. a The COP value of the ground source heat pump in connection mode a.

[0014] The step of determining the system COP value under different connection modes based on the output energy of the ground source heat pump and the system power consumption of the solar photovoltaic / solar thermal and geothermal systems under different connection modes further includes:

[0015] The system power consumption under different connection modes is determined based on the sum of the power losses of the ground source heat pump and the circulating pump in different connection modes of the solar photovoltaic / photothermal and geothermal systems.

[0016] The system COP value under different connection modes is determined based on the ratio of the output energy of the ground source heat pump to the system power consumption of the solar photovoltaic / solar thermal and geothermal systems under different connection modes.

[0017] Specifically, determining the system COP temperature loss ratio index based on the difference between the original temperature value and the operating temperature value at the same monitoring point in the same soil layer, and the system COP value, includes:

[0018] Obtain the maximum and minimum system power consumption among the system power consumption under the different connection modes.

[0019] The normalized power consumption of the system is determined based on the system power consumption, maximum system power consumption, and minimum system power consumption under different connection modes.

[0020] The penalty operator for different connection modes is determined based on the normalized power consumption of the system.

[0021] The system COP temperature loss ratio index is determined based on the penalty operator of the solar photovoltaic / photothermal and geothermal systems under different connection modes, the difference between the original temperature value and the operating temperature value of the same monitoring point in the same soil layer, and the system COP value.

[0022] Specifically, determining the normalized power consumption of the system based on the system power consumption under different connection modes, the maximum system power consumption, and the minimum system power consumption includes:

[0023] according to Determine the normalized power consumption of the system, where E mode,i For system power consumption under different connection modes, E gshp,i For the power consumption of a ground source heat pump, E pump，i E′ represents the power consumption of the circulating pump. mode，i E represents the normalized power consumption of the system. mode，max For maximum system power consumption, E mode，min This represents the minimum system power consumption.

[0024] Specifically, determining the penalty operator under different connection modes based on the normalized power consumption of the system includes:

[0025] according to Determine the penalty operator for different connection modes, where f mode，i To punish the operator, E′ mode，i This represents the normalized power consumption of the system.

[0026] Specifically, determining the system COP temperature loss ratio index based on the penalty operator of the solar photovoltaic / photothermal and geothermal systems under different connection modes, the difference between the original temperature value and the operating temperature value at the same monitoring point in the same soil layer, and the system COP value includes:

[0027] according to Determine the system COP value under different connection modes, where SCOPTLR is the COP temperature loss rate caused by system operation, i.e., the system COP temperature loss ratio index, f mode，i For the penalty operator, N is the number of soil layers, T oi，j，k Let T be the original temperature of the monitoring point located in the i-th row and k-th column of the soil layer. ai，j，k Let COP be the operating temperature of the monitoring point located in the j-th row and k-th column of soil layer i. sys,a This represents the system COP value in connection mode a.

[0028] Specifically, the process of evaluating the geothermal resource utilization efficiency of the ground source heat pump based on the COP temperature loss ratio index, and evaluating the comprehensive performance of the solar photovoltaic / solar thermal and geothermal systems based on the system COP temperature loss ratio index, includes:

[0029] The efficiency of geothermal resource utilization is evaluated by comparing the COP temperature loss ratio index with a first preset threshold.

[0030] If the COP temperature loss ratio index is determined to be greater than or equal to the first preset threshold, it indicates that the geothermal resource utilization efficiency of the ground source heat pump is low.

[0031] If the COP temperature loss ratio is determined to be less than a first preset threshold, it indicates that the geothermal resource utilization efficiency of the ground source heat pump is high.

[0032] The overall performance of the solar photovoltaic / solar thermal and geothermal systems is evaluated by comparing the system's COP (Coefficient of Performance) temperature loss ratio with a second preset threshold. The overall performance includes energy efficiency, geothermal sustainability, and economic efficiency.

[0033] If the system's COP (Coefficient of Performance) temperature loss ratio is greater than or equal to the second preset threshold, it indicates that the system's overall performance is low during operation.

[0034] If the system's COP (temperature loss ratio) is less than a second preset threshold, it indicates that the system has high overall performance during operation.

[0035] A performance evaluation system for solar photovoltaic / solar thermal and geothermal systems, the system comprising:

[0036] The temperature acquisition module is used to monitor soil temperature changes during system operation and to collect the original temperature value and operating temperature value of the soil core layer.

[0037] The ground source heat pump COP value determination module is used to determine the ground source heat pump COP value under different connection modes based on the ratio of the output energy of the ground source heat pump to the electrical energy consumed by the solar photovoltaic / photothermal and geothermal systems under different connection modes.

[0038] The COP temperature loss ratio determination module is used to determine the COP temperature loss ratio index based on the difference between the original temperature value and the operating temperature value at the same monitoring point in the same soil layer, as well as the COP value of the ground source heat pump.

[0039] The system COP value determination module is used to determine the system COP value under different connection modes based on the output energy of the ground source heat pump and the system power consumption of the solar photovoltaic / photothermal and geothermal systems under different connection modes.

[0040] The system COP temperature loss ratio determination module is used to determine the system COP temperature loss ratio index based on the difference between the original temperature value and the operating temperature value of the same monitoring point in the same soil layer, and the system COP value.

[0041] The evaluation module is used to evaluate the geothermal resource utilization efficiency of the ground source heat pump based on the COP temperature loss ratio index, and to evaluate the comprehensive performance of the solar photovoltaic / photothermal and geothermal systems based on the system COP temperature loss ratio index.

[0042] A computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to perform the steps of the method described above.

[0043] The embodiments of the present invention have the following beneficial effects:

[0044] This invention obtains the initial and operating temperature values ​​by monitoring changes in soil temperature. Furthermore, based on the energy output to consumption ratio under different connection modes (whether or not solar collectors are connected), the COP values ​​of the ground source heat pump and the entire system under different connection modes are calculated. The temperature loss ratios of the ground source heat pump and the system are calculated using the initial and operating temperature values, as well as the COP values ​​of the ground source heat pump and the entire system under different connection modes. This determines the COP temperature loss ratio index and the system COP temperature loss ratio index. Based on these indices, the comprehensive performance of geothermal resources and the system can be more accurately assessed, thereby effectively improving the efficient utilization of geothermal resources and the system's energy efficiency. It can simultaneously evaluate the performance of the solar geothermal system in terms of geothermal resource utilization efficiency and system energy efficiency, providing more comprehensive performance evaluation results. Moreover, by quantifying the COP temperature loss ratio index and the system COP temperature loss ratio index, the performance changes of the system during long-term operation are accurately reflected, providing a reliable basis for system optimization. This provides scientific guidance for the optimized design and operation strategy formulation of solar geothermal systems, helping to improve the overall performance and economy of the system and promoting the efficient utilization of renewable energy. Attached Figure Description

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0046] in:

[0047] Figure 1This is a flowchart illustrating an embodiment of a performance evaluation method for solar photovoltaic / photothermal and geothermal systems provided by the present invention.

[0048] Figure 2 This is a schematic flowchart of another embodiment of the performance evaluation method for solar photovoltaic / photothermal and geothermal systems provided by the present invention;

[0049] Figure 3 This is a schematic diagram of an embodiment of a performance evaluation system for solar photovoltaic / photothermal and geothermal systems provided by the present invention.

[0050] Figure 4 A schematic diagram of the structure of an embodiment of the medium provided by the present invention. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] like Figure 1 As shown, Figure 1 This is a flowchart illustrating an embodiment of a performance evaluation method for a solar photovoltaic / solar thermal and geothermal system provided by the present invention. The solar photovoltaic / solar thermal and geothermal system includes an interconnected ground source heat pump, a solar collector, and a circulating pump. The performance evaluation method for the solar photovoltaic / solar thermal and geothermal system includes:

[0053] S101: Monitor soil temperature changes during system operation, and collect the original temperature value and operating temperature value of the soil core layer.

[0054] For example, a complete solar photovoltaic / solar thermal and geothermal system is constructed, including a ground source heat pump, solar collectors, thermal storage devices, circulation pumps, and other equipment, ensuring the normal operation of each device. Soil temperature changes during system operation are monitored, and the original temperature value and operating temperature value of the soil core layer are collected.

[0055] S102: Determine the COP value of the ground source heat pump under different connection modes based on the ratio of the output energy to the consumed electrical energy of the ground source heat pump under different connection modes of the solar photovoltaic / solar thermal and geothermal systems. The connection modes include the system without solar collectors and the system with solar collectors.

[0056] For example, the connection modes of solar photovoltaic / solar thermal and geothermal systems include systems without solar collectors and systems with solar collectors. The COP value of the ground source heat pump under different connection modes is determined based on the ratio of the output energy of the ground source heat pump to the consumed electrical energy. The COP value measures the energy efficiency performance of the ground source heat pump itself. Specifically, the COP value of the ground source heat pump under different connection modes is determined according to the following formula:

[0057]

[0058] Among them, COP gshp E represents the COP value of a ground source heat pump. gshp Q is the electrical energy consumed by the ground source heat pump. gshp This refers to the output energy of a ground source heat pump.

[0059] S103: Determine the COP temperature loss ratio index based on the difference between the original temperature value and the operating temperature value at the same monitoring point in the same soil layer, and the COP value of the ground source heat pump.

[0060] For example, the COP (Coefficient of Performance) temperature loss ratio is determined according to the following formula:

[0061]

[0062] Where 'a' represents the current connection mode of the solar photovoltaic / solar thermal and geothermal systems, 'COPTLR' represents the COP temperature loss ratio caused by system operation, i.e., the COP temperature loss ratio index, 'N' represents the number of soil layers, and 'T' represents the temperature loss ratio of the system. oi，j，k T represents the original temperature value of the monitoring point located in the j-th row and k-th column of the soil layer. ai，j，k COP represents the operating temperature value of the monitoring point located in the j-th row and k-th column of the soil layer. a The COP value of the ground source heat pump in connection mode a.

[0063] S104: Determine the system COP value under different connection modes based on the output energy of the ground source heat pump and the system power consumption of the solar photovoltaic / solar thermal and geothermal systems under different connection modes.

[0064] For example, the system power consumption is determined based on the sum of the electrical energy consumed by the ground source heat pump and the circulating pump in different connection modes of the solar photovoltaic / solar thermal and geothermal systems, as shown in the following formula:

[0065] E mode,i =E gshp,i +E pump,i ;

[0066] Among them, E mode,i For system power consumption, E gshp,i For the power consumption of a ground source heat pump, Epump，i This represents the power consumption of the circulating pump.

[0067] Furthermore, the system COP value under different connection modes is determined based on the ratio of the output energy of the ground source heat pump to the system power consumption of the solar photovoltaic / solar thermal and geothermal systems under different connection modes, as shown in the following formula:

[0068]

[0069] Among them, COP sys E represents the system COP value. mode,i Q represents the system power consumption. gshp This refers to the output energy of a ground source heat pump.

[0070] S105: Determine the system COP temperature loss ratio index based on the difference between the original temperature value and the operating temperature value at the same monitoring point in the same soil layer, and the system COP value.

[0071] For example, the maximum and minimum system power consumption under different connection modes are obtained; the normalized power consumption of the system is determined based on the system power consumption under different connection modes, the maximum system power consumption, and the minimum system power consumption, as shown in the following formula:

[0072]

[0073] Among them, E mode,i For system power consumption under different connection modes, E gshp,i For the power consumption of a ground source heat pump, E pump， i represents the power consumption of the circulating pump, E′ mode，i E represents the normalized power consumption of the system. mode，max For maximum system power consumption, E mode，min This represents the minimum system power consumption.

[0074] Furthermore, the penalty operator for different connection modes is determined based on the normalized power consumption of the system, as shown in the following equation:

[0075] according to Determine the penalty operator for different connection modes, where f mode，i For the penalty operator, E′mode, i is the normalized power consumption of the system.

[0076] Finally, based on the penalty operators of solar photovoltaic / solar thermal and geothermal systems under different connection modes, the difference between the original temperature value and the operating temperature value at the same monitoring point in the same soil layer, and the system COP value, the system COP temperature loss ratio index is determined as follows:

[0077]

[0078] Wherein, SCOPTLR is the COP temperature loss rate caused by system operation, i.e., the system COP temperature loss ratio index, f mode，i For the penalty operator, N is the number of soil layers, T oi，j，k Let T be the original temperature of the monitoring point located in the i-th row and k-th column of the soil layer. ai，j，k Let COP be the operating temperature of the monitoring point located in the j-th row and k-th column of soil layer i. sys,a This represents the system COP value in connection mode a.

[0079] S106: Evaluate the geothermal resource utilization efficiency of ground source heat pumps based on the COP temperature loss ratio index, and evaluate the comprehensive performance of solar photovoltaic / photothermal and geothermal systems based on the system COP temperature loss ratio index.

[0080] For example, the geothermal resource utilization efficiency is evaluated by comparing the COP temperature loss ratio index with a first preset threshold; if the COP temperature loss ratio index is greater than or equal to the first preset threshold, it indicates that the geothermal resource utilization efficiency of the ground source heat pump is low; if the COP temperature loss ratio index is less than the first preset threshold, it indicates that the geothermal resource utilization efficiency of the ground source heat pump is high. The comprehensive performance of the solar photovoltaic / solar thermal and geothermal systems is evaluated by comparing the system COP temperature loss ratio index with a second preset threshold, wherein the comprehensive performance includes energy efficiency, geothermal sustainability, and economy; if the system COP temperature loss ratio index is greater than or equal to the second preset threshold, it indicates that the comprehensive performance of the system during operation is low; if the system COP temperature loss ratio index is less than the second preset threshold, it indicates that the comprehensive performance of the system during operation is high.

[0081] As described above, this invention obtains the original temperature value and the operating temperature value by monitoring changes in soil temperature. Furthermore, based on the energy output to consumption ratio under different connection modes (whether or not a solar collector is connected), the COP value of the ground source heat pump and the entire system under different connection modes is calculated. The temperature loss ratios of the ground source heat pump and the system are calculated using the original temperature and operating temperature values, the COP values ​​of the ground source heat pump under different connection modes, and the overall system temperature loss ratio. This determines the COP temperature loss ratio index and the system COP temperature loss ratio index. Based on these indices, the comprehensive performance of geothermal resources and the system can be more accurately assessed, thereby effectively improving the efficient utilization of geothermal resources and the system's energy efficiency. This allows for simultaneous evaluation of the performance of the solar geothermal system in terms of geothermal resource utilization efficiency and system energy efficiency, providing a more comprehensive performance assessment result. Furthermore, by quantifying the COP temperature loss ratio index and the system COP temperature loss ratio index, the performance changes of the system during long-term operation are accurately reflected, providing a reliable basis for system optimization. This provides scientific guidance for the optimized design and operation strategy formulation of solar geothermal systems, helping to improve the overall performance and economy of the system and promoting the efficient utilization of renewable energy.

[0082] like Figure 2 As shown, Figure 2 This is a flowchart illustrating an embodiment of a performance evaluation method for solar photovoltaic / solar thermal and geothermal systems provided by the present invention. The method includes:

[0083] S201: Monitor soil temperature changes during system operation, and collect the original temperature value and operating temperature value of the soil core layer.

[0084] S202: Determine the COP value of the ground source heat pump under different connection modes based on the ratio of the output energy to the consumed electrical energy of the ground source heat pump under different connection modes of the solar photovoltaic / solar thermal and geothermal systems. The connection modes include the system without solar collectors and the system with solar collectors.

[0085] For example, the connection modes of solar photovoltaic / solar thermal and geothermal systems include systems without solar collectors and systems with solar collectors. The COP value of the ground source heat pump under different connection modes is determined based on the ratio of the output energy of the ground source heat pump to the consumed electrical energy. The COP value measures the energy efficiency performance of the ground source heat pump itself. Specifically, the COP value of the ground source heat pump under different connection modes is determined according to the following formula:

[0086]

[0087] Among them, COPgshp E represents the COP value of a ground source heat pump. gshp Q is the electrical energy consumed by the ground source heat pump. gshp This refers to the output energy of a ground source heat pump.

[0088] S203: Determine the COP temperature loss ratio index based on the difference between the original temperature value and the operating temperature value at the same monitoring point in the same soil layer, and the COP value of the ground source heat pump.

[0089] For example, the COP (Coefficient of Performance) temperature loss ratio is determined according to the following formula:

[0090]

[0091] Where 'a' represents the current connection mode of the solar photovoltaic / solar thermal and geothermal systems, 'COPTLR' represents the COP temperature loss ratio caused by system operation, i.e., the COP temperature loss ratio index, 'N' represents the number of soil layers, and 'T' represents the temperature loss ratio of the system. oi，j，k Let T be the original temperature of the monitoring point located in the j-th row and k-th column of the soil layer. ai，j，k COP represents the operating temperature of the monitoring point located in the j-th row and k-th column of the soil layer. a The COP value of the ground source heat pump in connection mode a.

[0092] S204: Determine the system power consumption under different connection modes based on the sum of the power losses of the ground source heat pump and the circulating pump under different connection modes of the solar photovoltaic / photothermal and geothermal systems.

[0093] For example, the system power consumption under different connection modes is determined based on the sum of the power losses of the ground source heat pump and the circulating pump in different connection modes of the solar photovoltaic / solar thermal and geothermal systems, as shown in the following formula:

[0094] E mode,i =E gshp,i +E pump,i ;

[0095] Among them, E mode,i For system power consumption, E gshp,i For the power consumption of a ground source heat pump, E pump，i This represents the power consumption of the circulating pump.

[0096] S205: Determine the system COP value under different connection modes based on the ratio of the output energy of the ground source heat pump to the system power consumption of the solar photovoltaic / solar thermal and geothermal systems under different connection modes.

[0097] For example, the system COP value under different connection modes is determined based on the ratio of the output energy of the ground source heat pump to the system power consumption of the solar photovoltaic / solar thermal and geothermal systems under different connection modes, as shown in the following formula:

[0098]

[0099] Among them, COP sys E represents the system COP value. mode,i Q represents the system power consumption. gshp This refers to the output energy of a ground source heat pump.

[0100] S206: Obtain the maximum and minimum system power consumption under different connection modes.

[0101] S207: Determine the normalized power consumption of the system based on the system power consumption, maximum system power consumption, and minimum system power consumption under different connection modes.

[0102] For example, the normalized power consumption of the system is determined according to the following formula:

[0103]

[0104] Among them, E mode,i For system power consumption under different connection modes, E gshp,i For the power consumption of a ground source heat pump, E pump， i represents the power consumption of the circulating pump, E′ mode，i E represents the normalized power consumption of the system. mode，max For maximum system power consumption, E mode，min This represents the minimum system power consumption.

[0105] S208: Determine the penalty operator for different connection modes based on the normalized power consumption of the system.

[0106] For example, the penalty operator for different connection modes is determined according to the following formula:

[0107]

[0108] Among them, f mode，i To punish the operator, E′ mode，i This represents the normalized power consumption of the system.

[0109] S209: Determine the system COP temperature loss ratio index based on the penalty operator of solar photovoltaic / solar thermal and geothermal systems under different connection modes, the difference between the original temperature value and the operating temperature value of the same monitoring point in the same soil layer, and the system COP value.

[0110] For example, the system COP value for different connection modes is determined according to the following formula:

[0111]

[0112] Wherein, SCOPTLR is the COP temperature loss rate caused by system operation, that is, the system COP temperature loss ratio refers to fmode，i For the penalty operator, N is the number of soil layers, T oi，j，k Let T be the original temperature of the monitoring point located in the j-th row and k-th column of the soil layer. ai，j，k COP represents the operating temperature of the monitoring point located in the j-th row and k-th column of the soil layer. sys,a This represents the system COP value in connection mode a.

[0113] It should be noted that the penalty operator represents economy; the higher the energy consumption, the larger this value, indicating that the system is operating at a high cost.

[0114] Energy efficiency item The lower the system COP, the larger this value, indicating that the system is operating with low energy efficiency.

[0115] Geothermal Sustainable Projects The greater the soil temperature loss, the larger this value, indicating that the system is overdrawn on resources at this time.

[0116] S210: Evaluate the geothermal resource utilization efficiency based on the comparison between the COP temperature loss ratio index and the first preset threshold.

[0117] S2101: If the COP temperature loss ratio index is greater than or equal to the first preset threshold, it indicates that the geothermal resource utilization efficiency of the ground source heat pump is low.

[0118] S2102: If the COP temperature loss ratio index is less than the first preset threshold, it indicates that the geothermal resource utilization efficiency of the ground source heat pump is high.

[0119] For example, the geothermal resource utilization efficiency is evaluated by comparing the COP (Coefficient of Performance) temperature loss ratio with a first preset threshold (0.6). A COP temperature loss ratio below 0.6 is considered a relatively low value, while a value above 0.6 is considered a relatively high value. Therefore, if the COP temperature loss ratio is greater than or equal to 0.6, it indicates that the geothermal resource utilization efficiency of the ground source heat pump is low; if the COP temperature loss ratio is less than 0.6, it indicates that the geothermal resource utilization efficiency of the ground source heat pump is high.

[0120] S211: Evaluate the overall performance of solar photovoltaic / solar thermal and geothermal systems by comparing the system COP temperature loss ratio index with the second preset threshold. The overall performance includes energy efficiency, geothermal sustainability, and economy.

[0121] S2111: If the system COP temperature loss ratio is greater than or equal to the second preset threshold, it indicates that the overall performance of the system is low during operation.

[0122] S2112: If the system COP temperature loss ratio is less than the second preset threshold, it indicates that the system has high overall performance during operation.

[0123] For example, the overall performance of solar photovoltaic / solar thermal and geothermal systems is evaluated by comparing the system's COP (Coefficient of Performance) temperature loss ratio with a second preset threshold (0.7). The overall performance includes energy efficiency, geothermal sustainability, and economic efficiency. If the system's COP temperature loss ratio is greater than or equal to 0.7, it indicates that the system's overall performance during operation is low; if the system's COP temperature loss ratio is less than 0.7, it indicates that the system's overall performance during operation is high.

[0124] like Figure 3 As shown, Figure 3 This is a schematic diagram of an embodiment of a solar photovoltaic / solar thermal and geothermal system performance evaluation system provided by the present invention. A solar photovoltaic / solar thermal and geothermal system performance evaluation system 10, the system comprising:

[0125] Temperature acquisition module 11 is used to monitor soil temperature changes during system operation and to acquire the original temperature value and operating temperature value of the soil core layer.

[0126] The ground source heat pump COP value determination module 12 is used to determine the ground source heat pump COP value under different connection modes based on the ratio of the output energy of the ground source heat pump to the electrical energy consumed by the solar photovoltaic / photothermal and geothermal systems under different connection modes.

[0127] The COP temperature loss ratio determination module 13 is used to determine the COP temperature loss ratio index based on the difference between the original temperature value and the operating temperature value of the same monitoring point in the same soil layer, as well as the COP value of the ground source heat pump.

[0128] The system COP value determination module 14 is used to determine the system COP value under different connection modes based on the output energy of the ground source heat pump and the system power consumption of the solar photovoltaic / photothermal and geothermal systems under different connection modes.

[0129] The system COP temperature loss ratio determination module 15 is used to determine the system COP temperature loss ratio index based on the difference between the original temperature value and the operating temperature value of the same monitoring point in the same soil layer, and the system COP value.

[0130] Evaluation module 16 is used to evaluate the geothermal resource utilization efficiency of the ground source heat pump based on the COP temperature loss ratio index, and to evaluate the comprehensive performance of the solar photovoltaic / photothermal and geothermal systems based on the system COP temperature loss ratio index.

[0131] For example, in the temperature acquisition module 11, soil temperature changes during system operation are monitored, and the original temperature value and operating temperature value of the soil core layer are acquired. In the ground source heat pump COP value determination module 12, the ground source heat pump COP value under different connection modes is determined based on the ratio of the output energy of the ground source heat pump to the consumed electrical energy under different connection modes of the solar photovoltaic / photothermal and geothermal systems. In the COP temperature loss ratio determination module 13, based on... Determine the COP (Coefficient of Performance) temperature loss ratio index, where 'a' represents the current connection mode of the solar photovoltaic / photothermal and geothermal systems, 'COPTLR' represents the COP temperature loss ratio caused by system operation (i.e., the COP temperature loss ratio index), 'N' represents the number of soil layers, and 'T' represents the temperature loss rate. oi，j，k Let T be the original temperature of the monitoring point located in the j-th row and k-th column of the soil layer. ai，j，k The operating temperature of the monitoring point located in the j-th row and k-th column of the soil layer is given by , and COPa is the COP value of the ground source heat pump under connection mode a. In the system COP value determination module 14, the system power consumption under different connection modes is determined based on the sum of the power losses of the ground source heat pump and the circulating pump of the solar photovoltaic / solar thermal and geothermal systems under different connection modes; the system COP value under different connection modes is determined based on the ratio of the output energy of the ground source heat pump to the system power consumption of the solar photovoltaic / solar thermal and geothermal systems under different connection modes. In the system COP temperature loss ratio determination module 15, the maximum and minimum system power consumption in the system power consumption under different connection modes are obtained; the normalized power consumption of the system is determined based on the system power consumption under different connection modes, the maximum system power consumption, and the minimum system power consumption; the penalty operator under different connection modes is determined based on the normalized power consumption of the system; the system COP temperature loss ratio index is determined based on the penalty operator of the solar photovoltaic / solar thermal and geothermal systems under different connection modes, the difference between the original temperature value and the operating temperature value of the same monitoring point in the same soil layer, and the system COP value. Specifically, based on Determine the system COP value under different connection modes, where SCOPTLR is the COP temperature loss rate caused by system operation, i.e., the system COP temperature loss ratio, f mode，i For the penalty operator, N is the number of soil layers, T oi，j，k Let T be the original temperature of the monitoring point located in the j-th row and k-th column of the soil layer. ai，j，k COP represents the operating temperature of the monitoring point located in the j-th row and k-th column of the soil layer. sys,a This represents the system COP value in connection mode a.

[0132] like Figure 4 As shown, Figure 4 This is a schematic diagram of the structure of an embodiment of the medium provided by the present invention. The medium 20 stores at least one computer program 21, which is executed by a processor to perform the following... Figure 1 and Figure 2 The method shown is detailed above and will not be repeated here. In one embodiment, the medium 20 can be a storage chip, hard disk, portable hard disk, USB flash drive, optical disk, or other read / write storage device, or even a server, etc.

[0133] Furthermore, the processes depicted in the accompanying drawings do not necessarily have to be performed in the specific or sequential order shown to achieve the desired result. In some implementations, multitasking and parallel processing are possible or may be advantageous.

[0134] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the embodiments of apparatus, devices, and non-volatile computer-readable storage media are basically similar to the method embodiments, and therefore described more simply; relevant parts can be referred to the descriptions of the method embodiments.

[0135] The apparatus, device, non-volatile computer-readable storage medium and method provided in the embodiments of this specification are corresponding. Therefore, the apparatus, device and non-volatile computer storage medium also have similar beneficial technical effects as the corresponding method. Since the beneficial technical effects of the method have been described in detail above, the beneficial technical effects of the corresponding apparatus, device and non-volatile computer storage medium will not be repeated here.

[0136] The systems, devices, modules, or units described in the above embodiments can be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, a computer can be, for example, a personal computer, laptop computer, cellular phone, camera phone, smartphone, personal digital assistant, media player, navigation device, email device, game console, tablet computer, wearable device, or any combination of these devices.

[0137] For ease of description, the above apparatus is described by dividing it into various functional units. Of course, in implementing this specification, the functions of each unit can be implemented in one or more software and / or hardware components. Those skilled in the art will understand that the embodiments of this specification can be provided as methods, systems, or computer program products. Therefore, the embodiments of this specification can take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Furthermore, the embodiments of this specification can take the form of computer program products implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0138] This specification is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this specification. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0139] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0140] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0141] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0142] Memory may include non-persistent storage in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0143] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0144] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0145] This specification can be described in the general context of computer-executable instructions that are executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform a specific task or implement a specific abstract data type. This specification can also be practiced in distributed computing environments, where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.

[0146] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0147] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A method for evaluating the performance of a solar photovoltaic / solar thermal and geothermal system, wherein the solar photovoltaic / solar thermal and geothermal system comprises an interconnected ground source heat pump, a solar collector, and a circulating pump, characterized in that, The method includes: The system monitors soil temperature changes during operation and collects the original and operating temperature values ​​of the soil core layer. The COP value of the ground source heat pump under different connection modes is determined based on the ratio of the output energy to the consumed electrical energy of the ground source heat pump under different connection modes of solar photovoltaic / solar thermal and geothermal systems. The connection modes include systems without solar collectors and systems with solar collectors. The COP temperature loss ratio index is determined based on the difference between the original temperature value and the operating temperature value at the same monitoring point in the same soil layer, and the COP value of the ground source heat pump. The system COP value under different connection modes is determined based on the output energy of the ground source heat pump and the system power consumption of the solar photovoltaic / photothermal and geothermal systems under different connection modes. The system COP temperature loss ratio index is determined based on the difference between the original temperature value and the operating temperature value at the same monitoring point in the same soil layer, and the system COP value. The geothermal resource utilization efficiency of the ground source heat pump is evaluated based on the COP temperature loss ratio index, and the overall performance of the solar photovoltaic / photothermal and geothermal systems is evaluated based on the system COP temperature loss ratio index.

2. The performance evaluation method for solar photovoltaic / photothermal and geothermal systems according to claim 1, characterized in that, The method of determining the COP temperature loss ratio index based on the ratio of the difference between the original temperature value and the operating temperature value at the same monitoring point in the same soil layer to the COP value of the ground source heat pump specifically includes: according to Determine the COP (Coefficient of Performance) temperature loss ratio index, where 'a' represents the current connection mode of the solar photovoltaic / photothermal and geothermal systems, 'COPTLR' represents the COP temperature loss ratio caused by system operation (i.e., the COP temperature loss ratio index), 'N' represents the number of soil layers, and 'T' represents the temperature loss rate. oi，j，k Let T be the original temperature of the monitoring point located in the j-th row and k-th column of soil layer i. ai，j，k Let be the operating temperature of the monitoring point located in the j-th row and k-th column of soil layer i, and COPa be the COP value of the ground source heat pump under connection mode a.

3. The performance evaluation method for solar photovoltaic / photothermal and geothermal systems according to claim 1, characterized in that, The method of determining the system COP value under different connection modes based on the output energy of the ground source heat pump and the system power consumption of the solar photovoltaic / solar thermal and geothermal systems under different connection modes also includes: The system power consumption under different connection modes is determined by the sum of the power losses of the ground source heat pump and the circulating pump under different connection modes of the solar photovoltaic / photothermal and geothermal systems. The system COP value under different connection modes is determined based on the ratio of the output energy of the ground source heat pump to the system power consumption of the solar photovoltaic / solar thermal and geothermal systems under different connection modes.

4. The performance evaluation method for solar photovoltaic / photothermal and geothermal systems according to claim 3, characterized in that, The determination of the system COP temperature loss ratio index based on the difference between the original temperature value and the operating temperature value at the same monitoring point in the same soil layer, and the system COP value, specifically includes: Obtain the maximum and minimum system power consumption among the system power consumption under the different connection modes; The normalized power consumption of the system is determined based on the system power consumption, maximum system power consumption, and minimum system power consumption under different connection modes. The penalty operator for different connection modes is determined based on the normalized power consumption of the system. The system COP temperature loss ratio index is determined based on the penalty operator of the solar photovoltaic / photothermal and geothermal systems under different connection modes, the difference between the original temperature value and the operating temperature value of the same monitoring point in the same soil layer, and the system COP value.

5. The performance evaluation method for solar photovoltaic / photothermal and geothermal systems according to claim 4, characterized in that, The process of determining the normalized power consumption of the system based on the system power consumption under different connection modes, the maximum system power consumption, and the minimum system power consumption specifically includes: according to Determine the normalized power consumption of the system, where E mode,i For system power consumption under different connection modes, E gshp,i For the power consumption of a ground source heat pump, E pump，i E′ represents the power consumption of the circulating pump. mode，i E represents the normalized power consumption of the system. mode，max For maximum system power consumption, E mode，min This represents the minimum system power consumption.

6. The performance evaluation method for solar photovoltaic / photothermal and geothermal systems according to claim 5, characterized in that, The step of determining the penalty operator for different connection modes based on the normalized power consumption of the system specifically includes: according to Determine the penalty operator for different connection modes, where f mode，i To punish the operator, E′ mode，i This represents the normalized power consumption of the system.

7. The performance evaluation method for solar photovoltaic / photothermal and geothermal systems according to claim 6, characterized in that, The determination of the system COP temperature loss ratio index based on the penalty operator of the solar photovoltaic / solar thermal and geothermal systems under different connection modes, the difference between the original temperature value and the operating temperature value of the same monitoring point in the same soil layer, and the system COP value specifically includes: according to Determine the system COP value under different connection modes, where SCOPTLR is the COP temperature loss rate caused by system operation, i.e., the system COP temperature loss ratio index, f mode，i For the penalty operator, N is the number of soil layers, T oi，j，k Let T be the original temperature of the monitoring point located in the i-th row and k-th column of the soil layer. ai，j，k Let COP be the operating temperature of the monitoring point located in the j-th row and k-th column of soil layer i. sys,a This represents the system COP value in connection mode a.

8. The method for evaluating the performance of solar photovoltaic / photothermal and geothermal systems according to claim 2 or 7, characterized in that, The process of evaluating the geothermal resource utilization efficiency of the ground source heat pump based on the COP temperature loss ratio index, and evaluating the comprehensive performance of the solar photovoltaic / solar thermal and geothermal systems based on the system COP temperature loss ratio index, specifically includes: The efficiency of geothermal resource utilization is evaluated by comparing the COP temperature loss ratio index with a first preset threshold. If the COP temperature loss ratio index is determined to be greater than or equal to the first preset threshold, it indicates that the geothermal resource utilization efficiency of the ground source heat pump is low. If the COP temperature loss ratio index is determined to be less than the first preset threshold, it indicates that the geothermal resource utilization efficiency of the ground source heat pump is high. The overall performance of the solar photovoltaic / solar thermal and geothermal systems is evaluated by comparing the system's COP (temperature loss ratio) index with a second preset threshold. The overall performance includes energy efficiency, geothermal sustainability, and economic efficiency. If the system's COP (temperature loss ratio) index is determined to be greater than or equal to the second preset threshold, it indicates that the system's overall performance is low during operation. If the system's COP (temperature loss ratio) is less than a second preset threshold, it indicates that the system has high overall performance during operation.

9. A performance evaluation system for solar photovoltaic / photothermal and geothermal systems, characterized in that, The system includes: The temperature acquisition module is used to monitor soil temperature changes during system operation and to collect the original temperature value and operating temperature value of the soil core layer. The ground source heat pump COP value determination module is used to determine the ground source heat pump COP value under different connection modes based on the ratio of the output energy to the consumed electrical energy of the ground source heat pump under different connection modes of solar photovoltaic / photothermal and geothermal systems. The COP temperature loss ratio determination module is used to determine the COP temperature loss ratio index based on the difference between the original temperature value and the operating temperature value at the same monitoring point in the same soil layer, as well as the COP value of the ground source heat pump. The system COP value determination module is used to determine the system COP value under different connection modes based on the output energy of the ground source heat pump and the system power consumption of the solar photovoltaic / photothermal and geothermal systems under different connection modes. The system COP temperature loss ratio determination module is used to determine the system COP temperature loss ratio index based on the difference between the original temperature value and the operating temperature value of the same monitoring point in the same soil layer, and the system COP value. The evaluation module is used to evaluate the geothermal resource utilization efficiency of the ground source heat pump based on the COP temperature loss ratio index, and to evaluate the comprehensive performance of the solar photovoltaic / photothermal and geothermal systems based on the system COP temperature loss ratio index.

10. A computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to perform the steps of the method as claimed in any one of claims 1 to 8.

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