Method and system for monitoring efficiency of mirror field heat collector of trough type photo-thermal power station

Abstract

The invention relates to a trough type photo-thermal power station mirror field heat collector efficiency monitoring method and system. The method comprises the steps that first flow data and first temperature data of a standard loop are obtained; calculating according to the first flow data and the first temperature data to obtain first energy of the standard loop; according to the first flow data, determining flow data of other heat collection loops except the standard loop in the mirror field; acquiring temperature data of other heat collection loops; energy of the other heat collection loops is calculated according to the flow data of the other heat collection loops and the temperature data of the other heat collection loops; and the efficiency of the heat collectors in the other heat collection loops is monitored according to the energy of the other heat collection loops and the first energy of the standard loop. According to the invention, the efficiency of the heat collector of the trough type photo-thermal power station mirror field can be monitored, low-efficiency loops can be found in time, loops with abnormal performance can be predicted in time, and the efficiency of the trough type photo-thermal power station mirror field can be evaluated.

Description

Technical Field

[0001] The present invention relates to the technical field of solar thermal power plants, and more specifically, to a method and system for monitoring the efficiency of a mirror field collector of a trough type solar thermal power plant. Background Art

[0002] At present, the parabolic trough solar thermal power plant mirror field is composed of different numbers of collector loops according to the unit capacity, usually 150-300 collector loops. The existing parabolic trough solar thermal power plant mirror field collectors do not have relevant loop efficiency measurement devices, and cannot detect low-efficiency loops in time, cannot predict loops with abnormal performance in time, and cannot evaluate the efficiency of the parabolic trough solar thermal power plant mirror field accordingly. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a method and system for monitoring the efficiency of a mirror field collector of a trough type solar thermal power station in view of the problems existing in the prior art.

[0004] The technical solution adopted by the present invention to solve the technical problem is: constructing a method for monitoring the efficiency of a mirror field collector of a trough type solar thermal power station, comprising the following steps:

[0005] Acquire first flow data and first temperature data of a standard loop;

[0006] Calculating according to the first flow data and the first temperature data to obtain a first energy of the standard circuit;

[0007] Determine the flow data of each heat collection circuit other than the standard circuit in the mirror field according to the first flow data;

[0008] Acquiring temperature data of each of the other heat collection circuits;

[0009] Calculate the energy of each other heat collection circuit according to the flow data of each other heat collection circuit and the temperature data of each other heat collection circuit;

[0010] The efficiency of the collectors in each of the other heat collection circuits is monitored according to the energy of each of the other heat collection circuits and the first energy of the standard circuit.

[0011] In the method for monitoring the efficiency of a mirror field collector of a trough type solar thermal power station of the present invention, the calculation based on the first flow data and the first temperature data to obtain the first energy of the standard loop includes:

[0012] Calculating the temperature difference of the standard circuit according to the first temperature data;

[0013] A calculation is performed based on the first flow data and the temperature difference of the standard circuit to obtain the first energy of the standard circuit.

[0014] In the method for monitoring the efficiency of a mirror field collector of a trough type solar thermal power station described in the present invention, the first temperature data includes: an outlet temperature of a standard circuit and an inlet temperature of a standard circuit;

[0015] Calculating the temperature difference of the standard circuit according to the first temperature data includes:

[0016] The outlet temperature of the standard loop is subtracted from the inlet temperature of the standard loop to obtain the temperature difference of the standard loop.

[0017] In the method for monitoring the efficiency of a mirror field collector of a trough solar thermal power station of the present invention, the step of calculating according to the first flow data and the temperature difference of the standard loop to obtain the first energy of the standard loop comprises:

[0018] The first flow data is multiplied by the temperature difference of the standard circuit to obtain the first energy of the standard circuit.

[0019] In the method for monitoring the efficiency of a mirror field collector in a trough type solar thermal power station of the present invention, the step of calculating the energy of each other heat collection circuit according to the flow data of each other heat collection circuit and the temperature data of each other heat collection circuit comprises:

[0020] Calculate the temperature difference of each collector circuit based on its temperature data;

[0021] The energy of each heat collection loop is obtained by calculating the temperature difference of each heat collection loop and its flow data.

[0022] In the method for monitoring the efficiency of a mirror field collector in a trough solar thermal power station of the present invention, monitoring the efficiency of the collectors in each of the other collector circuits according to the energy of each of the other collector circuits and the first energy of the standard circuit comprises:

[0023] Calculating according to the energy of each of the other heat collection circuits and the first energy of the standard circuit to obtain energy deviations between each of the heat collection circuits and the standard circuit;

[0024] According to the energy deviation between each heat collection circuit and the standard circuit, the heat collection circuit is ranked and sorted to obtain the ranking result;

[0025] The efficiency of the collectors in each heat collection loop is monitored according to the ranking result.

[0026] In the method for monitoring the efficiency of a mirror field collector of a trough type solar thermal power station described in the present invention, the grading results include: first grade, second grade, third grade, fourth grade and fifth grade;

[0027] The step of monitoring the efficiency of the heat collectors in each heat collection circuit according to the hierarchical sorting result comprises:

[0028] If the ranking result of the current heat collection circuit is the first level, the efficiency of the collector in the current heat collection circuit is excellent;

[0029] If the ranking result of the current heat collection circuit is the second level, the efficiency of the collector in the current heat collection circuit is good;

[0030] If the ranking result of the current heat collection circuit is the third level, the efficiency of the collector in the current heat collection circuit is average;

[0031] If the ranking result of the current heat collection circuit is the fourth level, the efficiency of the collector in the current heat collection circuit is poor;

[0032] If the grading result of the current heat collection loop is the fifth level, the efficiency of the collector in the current heat collection loop is poor.

[0033] In the method for monitoring the efficiency of a mirror field collector of a trough type solar thermal power station described in the present invention, the method further includes:

[0034] Generate reports on the overall efficiency of the CSP plant, the efficiency of each mirror field, and the efficiency of each collector loop.

[0035] The present invention also provides a parabolic trough solar thermal power station mirror field collector efficiency monitoring system, comprising: a parabolic trough, a standard circuit and a plurality of heat collecting circuits installed in the parabolic trough, a flow meter installed on the standard circuit, a first temperature collection unit installed on the standard circuit, a plurality of second temperature collection units installed on the plurality of heat collecting circuits, and a control unit;

[0036] The flow meter is used to collect first flow data of the standard loop;

[0037] The first temperature acquisition unit is used to acquire first temperature data of the standard loop;

[0038] The plurality of second temperature acquisition units are used to acquire temperature data of the plurality of heat collection circuits;

[0039] The control unit is used for:

[0040] Acquire first flow data and first temperature data of a standard loop;

[0041] Calculating according to the first flow data and the first temperature data to obtain a first energy of the standard circuit;

[0042] Determine the flow data of each heat collection circuit other than the standard circuit in the mirror field according to the first flow data;

[0043] Acquiring temperature data of each of the other heat collection circuits;

[0044] Calculate the energy of each other heat collection circuit according to the flow data of each other heat collection circuit and the temperature data of each other heat collection circuit;

[0045] The efficiency of the collectors in each of the other heat collection circuits is monitored according to the energy of each of the other heat collection circuits and the first energy of the standard circuit.

[0046] The parabolic trough solar thermal power station mirror field collector efficiency monitoring system of the present invention also includes:

[0047] A report generation module is used to generate reports on the overall efficiency of the solar thermal power station, the efficiency of each mirror field and the efficiency of each collector loop.

[0048] The method and system for monitoring the efficiency of the collectors in the mirror field of a trough type solar thermal power station of the present invention have the following beneficial effects: comprising the steps of obtaining the first flow data and the first temperature data of the standard circuit; calculating according to the first flow data and the first temperature data to obtain the first energy of the standard circuit; determining the flow data of each other collector circuit in the mirror field except the standard circuit according to the first flow data; obtaining the temperature data of each other collector circuit; calculating the energy of each other collector circuit according to the flow data of each other collector circuit and the temperature data of each other collector circuit; monitoring the efficiency of the collectors in each other collector circuit according to the energy of each other collector circuit and the first energy of the standard circuit. The present invention can monitor the efficiency of the collectors in the mirror field of a trough type solar thermal power station, can timely discover the low-efficiency circuit, and then timely predict the circuit with abnormal performance, and can also realize the evaluation of the efficiency of the mirror field of the trough type solar thermal power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0050] Figure 1 It is a schematic flow chart of the efficiency monitoring method of the mirror field collector of the trough type solar thermal power station provided by the present invention;

[0051] Figure 2 It is a structural schematic diagram of the heat collection circuit provided by the present invention;

[0052] Figure 3 It is a principle block diagram of the efficiency monitoring system of the mirror field collector of the trough type solar thermal power station provided by the present invention. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] Figure 1 The invention shows the method for monitoring the efficiency of the mirror field collector of the trough type solar thermal power station provided by the present invention.

[0055] Specifically, Figure 1 As shown, the method for monitoring the efficiency of the mirror field collector of the trough type solar thermal power station includes the following steps:

[0056] Step S101: Acquire first flow data and first temperature data of the standard loop 10 .

[0057] In this embodiment, the standard loop 10 is one of all the collector loops in the mirror field of the trough solar thermal power station, wherein the collector loop is a loop with excellent performance in the mirror field, that is, its mirror surface cleanliness and manifold cleanliness are both in the best state. All the collector loops in the mirror field are composed of four collectors connected in series. Figure 2 The arrow in the figure indicates a heat collection circuit.

[0058] In this embodiment, the first flow data of the standard loop 10 can be measured and collected by the flow meter 11 installed on the standard loop 10. The first temperature data includes: the outlet temperature of the standard loop 10 and the inlet temperature of the standard loop 10. Among them, the outlet temperature of the standard loop 10 can be measured and collected by a thermometer (i.e., the first temperature collection unit 12) installed at the temperature measuring point at the outlet of the standard loop 10, and the inlet temperature of the standard loop 10 can be measured and collected by a thermometer installed at the temperature measuring point at the inlet of the standard loop 10.

[0059] Step S102: Calculate according to the first flow data and the first temperature data to obtain the first energy of the standard loop 10.

[0060] In this embodiment, calculating based on the first flow data and the first temperature data to obtain the first energy of the standard loop 10 includes: calculating the temperature difference of the standard loop 10 based on the first temperature data; calculating based on the first flow data and the temperature difference of the standard loop 10 to obtain the first energy of the standard loop 10.

[0061] Calculating the temperature difference of the standard loop 10 according to the first temperature data includes: subtracting the outlet temperature of the standard loop 10 from the inlet temperature of the standard loop 10 to obtain the temperature difference of the standard loop 10 .

[0062] In this embodiment, calculating based on the first flow data and the temperature difference of the standard loop 10 to obtain the first energy of the standard loop 10 includes: multiplying the first flow data by the temperature difference of the standard loop 10 to obtain the first energy of the standard loop 10.

[0063] Step S103: determining the flow data of each heat collection loop in the mirror field except the standard loop 10 according to the first flow data.

[0064] Specifically, since all the solar collection circuits in the entire mirror field have been flow-leveled, after the flow of the standard circuit 10 is measured by the flow meter 11, the flow of other solar collection circuits in the mirror field can be determined based on the flow of the standard circuit 10, that is, the flow of other solar collection circuits is the same as the flow of the standard circuit 10.

[0065] Step S104: Acquire temperature data of other heat collection circuits.

[0066] In this embodiment, the temperature data of each heat collection circuit includes: the outlet temperature of each heat collection circuit and the inlet temperature of each heat collection circuit. Among them, the outlet temperature of each heat collection circuit can be measured and collected by a thermometer installed at the temperature measuring point at the outlet of each heat collection circuit, and the inlet temperature of each heat collection circuit can be measured and collected by a thermometer installed at the temperature measuring point at the inlet of each heat collection circuit. Among them, the thermometer at the temperature measuring point at the outlet of each heat collection circuit and the thermometer at the temperature measuring point at the inlet are the second temperature acquisition units referred to later. That is, the second temperature acquisition unit referred to in the embodiment of the present invention includes: thermometers installed at the temperature measuring points at the inlet and outlet of each heat collection circuit.

[0067] Step S105: Calculate the energy of each other heat collection circuit according to the flow data of each other heat collection circuit and the temperature data of each other heat collection circuit.

[0068] Calculating the energy of each other heat collection circuit based on the flow data of each other heat collection circuit and the temperature data of each other heat collection circuit includes: calculating the temperature difference of each heat collection circuit based on the temperature data of each heat collection circuit; calculating based on the temperature difference of each heat collection circuit and its flow data to obtain the energy of each heat collection circuit.

[0069] Specifically, in this embodiment, the energy calculation method of each other heat collection circuit is the same as the energy calculation method of the standard circuit 10. That is, the energy of each heat collection circuit is obtained by multiplying the temperature difference (outlet temperature-inlet temperature) and flow rate of each heat collection circuit.

[0070] Step S106 : monitoring the efficiency of the collectors in the other heat collection loops according to the energy of the other heat collection loops and the first energy of the standard loop 10 .

[0071] In this embodiment, monitoring the efficiency of the collectors in each other thermal collection circuit based on the energy of each other thermal collection circuit and the first energy of the standard circuit 10 includes: calculating based on the energy of each other thermal collection circuit and the first energy of the standard circuit 10 to obtain the energy deviation of each thermal collection circuit and the standard circuit 10; sorting the energy deviations between each thermal collection circuit and the standard circuit 10 to obtain the sorting results; and monitoring the efficiency of the collectors in each thermal collection circuit based on the sorting results.

[0072] Optionally, in this embodiment, the hierarchical ranking results include: first level, second level, third level, fourth level and fifth level. Among them, the deviation range of the first level is: less than 5%; the deviation range of the second level is: 5% to 10%; the deviation range of the third level is: 10% to 15%; the deviation range of the fourth level is: 15% to 20%; the deviation range of the fifth level is: 20% to 25%.

[0073] Among them, monitoring the efficiency of the collectors in each solar collector circuit according to the graded sorting results includes: if the graded sorting result of the current solar collector circuit is the first level, the efficiency of the collectors in the current solar collector circuit is excellent; if the graded sorting result of the current solar collector circuit is the second level, the efficiency of the collectors in the current solar collector circuit is good; if the graded sorting result of the current solar collector circuit is the third level, the efficiency of the collectors in the current solar collector circuit is average; if the graded sorting result of the current solar collector circuit is the fourth level, the efficiency of the collectors in the current solar collector circuit is poor; if the graded sorting result of the current solar collector circuit is the fifth level, the efficiency of the collectors in the current solar collector circuit is poor.

[0074] Specifically, by comparing the energy of each other heat collection circuit with the energy of the standard circuit 10, the energy deviation (i.e., △S i =(|S i -S 标 ∣ / S 标 )×100%), where i is the serial number of the collector circuit in the mirror field, i is an integer, △S i is the energy deviation between the ith collector loop and the standard loop 10, S i is the energy of the ith collector circuit, S 标is the energy of the standard loop 10. By calculating the energy deviation between each heat collection loop and the standard loop 10, the energy deviations are graded and sorted according to the calculated energy deviations. If the energy deviation is less than 5%, it means that the efficiency of the heat collection loop is excellent; if the energy deviation is 5% to 10%, it means that the efficiency of the heat collection loop is good; if the energy deviation is 10% to 15%, it means that the efficiency of the heat collection loop is average; if the energy deviation is 15% to 20%, it means that the efficiency of the heat collection loop is poor; if the energy deviation is 20% to 25%, it means that the efficiency of the heat collection loop is poor.

[0075] Therefore, through comparative statistical analysis, the efficiency of each heat collection loop in the mirror field can be monitored, so as to evaluate the efficiency of the collectors in each heat collection loop (i.e., heat collection efficiency). For example, suppose there are 190 heat collection loops in a mirror field, and one of the heat collection loops with the best performance is selected as the standard loop 10. The energy of the standard loop 10 and the energy of the other 189 heat collection loops are calculated respectively, and then the energy deviation of these 189 heat collection loops and the standard loop 10 is calculated, and then they are ranked and sorted, and finally the efficiency of the 189 heat collection loops is determined according to the ranking results.

[0076] In this embodiment, by monitoring the efficiency of each heat collection circuit, the heat collection circuit with poor efficiency can be discovered in time. For example, for the heat collection circuit with the fourth efficiency level, corresponding adjustments can be made to improve its heat collection efficiency; for the heat collection circuit with the fifth efficiency level, it is necessary to carry out maintenance to timely discover abnormalities, faults or problems. Among them, for the heat collection circuit with low heat collection efficiency, its low heat collection efficiency indicates that its heat collection temperature difference, and the reasons for the heat collection temperature difference are: poor collector performance, low efficiency of heat collection tubes, insufficient focusing accuracy of the collector, and reduced reflectivity of the collector mirror due to damage. Therefore, abnormalities, faults or problems can be discovered through maintenance, so that risks can be predicted and improved in advance, thereby improving the efficiency of the collector.

[0077] Furthermore, in this embodiment, the method for monitoring the efficiency of the collectors in the mirror field of the trough type CSP power station also includes: generating reports on the overall efficiency of the CSP power station, the efficiency of each mirror field, and the efficiency of each collector circuit. By generating reports on the overall efficiency of the CSP power station, the efficiency of each mirror field, and the efficiency of each collector circuit, the efficiency of the entire CSP power station can be intuitively viewed and mastered, so as to timely understand problems and improve and enhance performance. It should be noted that a trough type CSP power station is generally provided with multiple mirror fields. Therefore, for each mirror field, the above method can be used to monitor and evaluate the efficiency of the collectors in the mirror field, so that the collector circuits with low collector efficiency of the trough type CSP power station can be discovered in time, the abnormal conditions of the collectors can be monitored in real time, and early warnings can be given in time, so that they can be discovered and improved in time.

[0078] refer to Figure 3 , Figure 3 This is a principle block diagram of the efficiency monitoring system for the mirror field collector of a trough type solar thermal power station provided by the present invention.

[0079] Specifically, Figure 3 As shown, the parabolic trough solar thermal power station mirror field collector efficiency monitoring system includes: a mirror field, a standard loop 10 installed in the mirror field and a plurality of collector loops (such as Figure 3 #1 heat collection circuit, #2 heat collection circuit, ..., #N heat collection circuit, N is an integer), a flow meter 11 installed on the standard circuit 10, a first temperature acquisition unit 12 installed on the standard circuit 10, and multiple second temperature acquisition units installed on multiple heat collection circuits (such as Figure 3 #1 second temperature acquisition unit, #2 second temperature acquisition unit, ..., #N second temperature acquisition unit, N is an integer) and a control unit 30.

[0080] The flow meter 11 is used to collect first flow data of the standard loop 10 .

[0081] The first temperature acquisition unit 12 is used to acquire first temperature data of the standard loop 10 .

[0082] The plurality of second temperature collection units are used to collect temperature data of the plurality of heat collection circuits.

[0083] The control unit 30 is used for:

[0084] Acquire first flow data and first temperature data of the standard loop 10;

[0085] Calculate according to the first flow data and the first temperature data to obtain the first energy of the standard loop 10;

[0086] Determine the flow data of each heat collection loop in the mirror field except the standard loop 10 according to the first flow data;

[0087] Obtain temperature data of other collector circuits;

[0088] Calculate the energy of each other heat collection circuit according to the flow data of each other heat collection circuit and the temperature data of each other heat collection circuit;

[0089] The efficiency of the collectors in each of the other heat collection loops is monitored according to the energy of each of the other heat collection loops and the first energy of the standard loop 10 .

[0090] Furthermore, in this embodiment, the parabolic trough solar thermal power plant mirror field collector efficiency monitoring system also includes: a report generation module 40, the report generation module 40 is used to generate reports on the overall efficiency of the solar thermal power plant, the efficiency of each mirror field and the efficiency of each collector loop.

[0091] Specifically, the specific coordination operation process between the various units in the parabolic trough solar thermal power station mirror field collector efficiency monitoring system here can refer to the above-mentioned parabolic trough solar thermal power station mirror field collector efficiency monitoring method, which will not be repeated here.

[0092] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0093] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0094] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0095] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot limit the scope of protection of the present invention. All equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A method for monitoring the efficiency of a parabolic trough solar thermal power station collector, characterized in that: The following steps are involved: Acquire first flow data and first temperature data of a standard loop; Calculating according to the first flow data and the first temperature data to obtain a first energy of the standard circuit; Determine the flow data of each other heat collection loop in the mirror field except the standard loop according to the first flow data; Acquiring temperature data of each of the other heat collection circuits; Calculate the energy of each other heat collection circuit according to the flow data of each other heat collection circuit and the temperature data of each other heat collection circuit; The efficiency of the collectors in each of the other heat collection circuits is monitored according to the energy of each of the other heat collection circuits and the first energy of the standard circuit.

2. The method for monitoring the efficiency of a parabolic trough solar thermal power station mirror field collector according to claim 1, characterized in that: The calculating according to the first flow data and the first temperature data to obtain the first energy of the standard circuit comprises: Calculating the temperature difference of the standard circuit according to the first temperature data; A calculation is performed based on the first flow data and the temperature difference of the standard circuit to obtain the first energy of the standard circuit.

3. The method for monitoring the efficiency of a parabolic trough solar thermal power station mirror field collector according to claim 2, characterized in that: The first temperature data includes: an outlet temperature of a standard circuit and an inlet temperature of a standard circuit; Calculating the temperature difference of the standard circuit according to the first temperature data includes: The outlet temperature of the standard loop is subtracted from the inlet temperature of the standard loop to obtain the temperature difference of the standard loop.

4. The method for monitoring the efficiency of a parabolic trough solar thermal power station mirror field collector according to claim 1, characterized in that: The step of calculating according to the first flow data and the temperature difference of the standard circuit to obtain the first energy of the standard circuit comprises: The first flow data is multiplied by the temperature difference of the standard circuit to obtain the first energy of the standard circuit.

5. The method for monitoring the efficiency of a parabolic trough solar thermal power station collector according to claim 1, characterized in that: The calculating the energy of each other heat collection circuit according to the flow data of each other heat collection circuit and the temperature data of each other heat collection circuit comprises: Calculate the temperature difference of each collector circuit based on its temperature data; The energy of each heat collection loop is obtained by calculating the temperature difference of each heat collection loop and its flow data.

6. The method for monitoring the efficiency of a parabolic trough solar thermal power station mirror field collector according to claim 1, characterized in that: The step of monitoring the efficiency of the heat collectors in each of the other heat collection circuits according to the energy of each of the other heat collection circuits and the first energy of the standard circuit comprises: Calculating according to the energy of each of the other heat collection circuits and the first energy of the standard circuit to obtain energy deviations between each of the heat collection circuits and the standard circuit; According to the energy deviation between each heat collection circuit and the standard circuit, the heat collection circuit is ranked and sorted to obtain the ranking result; The efficiency of the collectors in each heat collection loop is monitored according to the ranking result.

7. The method for monitoring the efficiency of a parabolic trough solar thermal power station collector according to claim 6, characterized in that: The hierarchical ranking results include: first level, second level, third level, fourth level and fifth level; The step of monitoring the efficiency of the heat collectors in each heat collection circuit according to the hierarchical sorting result comprises: If the ranking result of the current heat collection circuit is the first level, the efficiency of the collector in the current heat collection circuit is excellent; If the ranking result of the current heat collection circuit is the second level, the efficiency of the collector in the current heat collection circuit is good; If the ranking result of the current heat collection circuit is the third level, the efficiency of the collector in the current heat collection circuit is average; If the ranking result of the current heat collection circuit is the fourth level, the efficiency of the collector in the current heat collection circuit is poor; If the grading result of the current heat collection loop is the fifth level, the efficiency of the collector in the current heat collection loop is poor.

8. The method for monitoring the efficiency of a parabolic trough solar thermal power station collector according to claim 1, characterized in that: The method further comprises: Generate reports on the overall efficiency of the CSP plant, the efficiency of each mirror field, and the efficiency of each collector loop.

9. A parabolic trough solar thermal power station collector efficiency monitoring system, characterized in that: include: A mirror field, a standard circuit and a plurality of heat collection circuits installed in the mirror field, a flow meter installed on the standard circuit, a first temperature collection unit installed on the standard circuit, a plurality of second temperature collection units installed on the plurality of heat collection circuits, and a control unit; The flow meter is used to collect first flow data of the standard loop; The first temperature acquisition unit is used to acquire first temperature data of the standard loop; The plurality of second temperature collection units are used to collect temperature data of the plurality of heat collection circuits; The control unit is used for: Acquire first flow data and first temperature data of a standard loop; Calculating according to the first flow data and the first temperature data to obtain a first energy of the standard circuit; Determine the flow data of each other heat collection loop in the mirror field except the standard loop according to the first flow data; Acquiring temperature data of each of the other heat collection circuits; Calculate the energy of each other heat collection circuit according to the flow data of each other heat collection circuit and the temperature data of each other heat collection circuit; The efficiency of the collectors in each of the other heat collection circuits is monitored according to the energy of each of the other heat collection circuits and the first energy of the standard circuit.

10. The parabolic trough solar thermal power station mirror field collector efficiency monitoring system according to claim 9, characterized in that: Also includes: A report generation module is used to generate reports on the overall efficiency of the solar thermal power station, the efficiency of each mirror field and the efficiency of each collector loop.

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