CN103335823B - The implementation method of trough type solar power generation heat collector thermal efficiency detection system - Google Patents
The implementation method of trough type solar power generation heat collector thermal efficiency detection system Download PDFInfo
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Abstract
The invention discloses a kind of trough type solar power generation heat collector thermal efficiency detection system, the problem such as the equipment solving condenser test macro in prior art is huge, testing efficiency is low, test is inconvenient.This trough type solar power generation heat collector thermal efficiency detection system, it is characterized in that: comprise the expansion drum (1) storing conduction oil, the Heat-transfer Oil Pump (2) being used for conduction oil being transferred to condenser is communicated with expansion drum (1), the oil cooler system (3) be all communicated with condenser and expansion drum (1), detection system, and for controlling the control system (6) of Heat-transfer Oil Pump (2), oil cooler system (3) and detection system.On the basis of the above, the invention also discloses the implementation method of this trough type solar power generation heat collector thermal efficiency detection system.The present invention has filled up the blank of trough type solar power generation heat collector thermal efficiency detection system in prior art, not only possesses novelty, and has very high practicality and creativeness.
Description
Technical field
The invention belongs to trough type solar power generation technical field, specifically, relate to a kind of trough type solar power generation heat collector thermal efficiency detection system and its implementation.
Background technology
Along with the continuous quickening of China's process of industrialization, energy resource consumption and electricity needs also present the trend increased fast.The electric structure of China based on coal not only consumes the non-renewable resources such as coal sharp, and serious environment pollution, is unfavorable for environmental protection, causes China to be faced with the severe challenge of energy resources and environment two aspect.Devoting Major Efforts To Developing utilizes reproducible green, the clean energy resourcies such as sun power, wind energy and biomass energy, effectively compared with the consumption of low-resource and the energy, can safeguard environment.
At present, there is large-scale commercial application experience for many years in high-temperature solar generating both at home and abroad, wherein ripe with groove type solar condensing thermal power generation system.Groove type solar condensing thermal power generation technology mainly utilizes groove type paraboloid mirror (condenser) by solar light focusing on one wire, the solar radiant energy after focusing on is absorbed by the tubulose heat absorption device (thermal-collecting tube) installed on this focal line, simultaneously, the fluid working substance (conduction oil) for absorbing solar radiant energy is filled in thermal-arrest organ pipe, then steam generator (solar boiler) is delivered to by pipeline by by the working medium heated, produce superheated vapor and send into steam turbine generator system generating, thus complete the conversion of solar energy to electrical.
The collecting efficiency of detection condenser is an important technology index in trough type solar power generation.In prior art, the routine inspection of condenser collecting efficiency is the detection making whole light field condenser, and heat conduction oil mass needed for this kind of test mode is very large, and the equipment of check system is huge, and the technical requirement of equipment is very high, and detection is inconvenient, detection efficiency is low.
Therefore, how to research and develop a kind of device miniaturization, detect the detection of reliable, simple and direct testing apparatus for groove type solar condensing thermal power generation station condenser collecting efficiency, just become the primary study content of those skilled in the art.
Summary of the invention
The object of the invention is to overcome above-mentioned defect, a kind of device miniaturization is provided, detect reliable, simple and direct, trough type solar power generation heat collector thermal efficiency detection system fast.
To achieve these goals, the technical solution used in the present invention is as follows:
Trough type solar power generation heat collector thermal efficiency detection system, comprise the expansion drum storing conduction oil, the Heat-transfer Oil Pump being used for conduction oil being transferred to condenser is communicated with expansion drum, the oil cooler system be all communicated with condenser and expansion drum, detection system, and for controlling the control system of Heat-transfer Oil Pump, oil cooler system and detection system.
In order to prevent conduction oil to be oxidized because of ingress of air, the present invention also comprises the nitrogen be communicated with for being filled with nitrogen in expansion drum with expansion drum and seals system.This nitrogen envelope system is made up of nitrogen cylinder group, and nitrogen envelope system is filled with nitrogen in expansion drum, keeps constant pressure in expansion drum.
In order to ensure that in expansion drum, pressure remains at below safety value, the present invention also comprises the blowdown vessel be communicated with expansion drum, and in expansion drum, be provided with the overpressure protection safety valve for controlling expansion drum and blowdown vessel connected state.When in expansion drum, pressure exceedes setting value (safety value), the conduction oil in expansion drum enters in blowdown vessel, thus reduces pressure in expansion drum, until in expansion drum within Pressure Drop to safety value.
Further, the present invention also comprises the online solar radiation monitoring system for Real-Time Monitoring solar radiation value.
Specifically, described detection system comprises conduction oil temperature, flow and pressure sensing instruments; Described control system is DCS control system.
Further, described oil cooler system comprises variable frequency control electric refrigerating machine oil cooler and bypass duct thereof, and the two is all communicated with expansion drum with condenser.
In order to efficient quick detects mounted groove type solar condensing thermal power generation station condenser on the spot, described trough type solar power generation heat collector thermal efficiency detection system is integrated on mobile platform.
In order to ensure the continual and steady operation of Heat-transfer Oil Pump, described expansion drum is positioned at the top of Heat-transfer Oil Pump.In one embodiment, expansion drum is arranged on system peak, causes a positive pressure head, make Pump Suction Nozzle be full of fluid to the Heat-transfer Oil Pump entrance being in downstream, ensures the continual and steady operation of Heat-transfer Oil Pump.
On the basis of said structure, present invention also offers the implementation method of this trough type solar power generation heat collector thermal efficiency detection system, comprise the following steps:
(1) online solar radiation monitoring system detects solar radiation value in real time; Conduction oil in expansion drum is delivered to condenser by Heat-transfer Oil Pump, and detection system detects the conduction oil temperature of condenser entrance, flow and pressure;
(2) after the heat-conducting oil heating in condenser heats up, through oil cooler system flowback in expansion drum, detection system detects conduction oil temperature, flow and the pressure that condenser exports;
(3) control system is according to the solar radiation value recorded in real time, the frequency of operation of different Heat-transfer Oil Pump and oil cooler system be set and repeat step (1) to (2), obtaining the conduction oil temperature of the conduction oil temperature of some groups of condenser entrances, flow and pressure and condenser outlet, flow and pressure;
(4) control system records according to all solar radiation value, the conduction oil temperature of condenser entrance corresponding with it, the conduction oil temperature of flow and pressure and condenser outlet, flow and pressure import computing machine, calculate the collecting efficiency of condenser under different solar radiation, draw the efficiency curve of condenser collecting efficiency and solar radiation value.
Wherein, the conduction oil in described step (2) after heat temperature raising through oil cooler system flowback to the concrete grammar of expansion drum is: when the conduction oil temperature of condenser outlet is less than preset temperature, conduction oil is back to expansion drum through oil cooler bypass; When the conduction oil temperature of condenser outlet is greater than preset temperature, oil cooler bypass is closed, and conduction oil flows into variable frequency control electric refrigerating machine oil cooler, and variable frequency control electric refrigerating machine oil cooler starts, and is cooled by conduction oil to be back to expansion drum to preset temperature.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) in the present invention, all devices is all integrated on mobile platform, thus mounted groove type solar condensing thermal power generation station condenser can be detected on the spot by efficient quick, effectively overcome the defect that equipment is huge, detection efficiency is low, detection is inconvenient of condenser detection system in prior art.
(2) in the present invention, expansion drum, Heat-transfer Oil Pump, oil cooler system and condenser unit form a closed circuit, by circulating-heating conduction oil, with test under different solar radiations, conduction oil is at the temperature of condenser import and export, flow and pressure parameter, thus obtain the condenser efficiency curve relevant to solar radiation (temperature), and the operation of proving installation is controlled by control system, not only testing efficiency is high, and test more comprehensively, accurately.
(3) in the present invention, online solar radiation monitoring system can Real-Time Monitoring solar radiation value, and control system adjusts test parameter according to monitor value, further increasing real-time and the degree of accuracy of test.
(4) in the present invention, nitrogen envelope system can prevent conduction oil to be oxidized because of ingress of air, blowdown vessel is then for ensureing that in expansion drum, pressure is in below safety value all the time, and above-mentioned two parts ensure that normal, the safe operation of trough type solar power generation heat collector thermal efficiency detection system.
(5) the present invention compared to existing technologies, not only possesses novelty and creativeness, and easily manufactured, with low cost, for it is applied on a large scale, established solid foundation.
Accompanying drawing explanation
Fig. 1 is system chart of the present invention.
Fig. 2 is fundamental diagram of the present invention.
Wherein, mark corresponding parts name in accompanying drawing to be called:
1-expansion drum, 2-Heat-transfer Oil Pump, 3-oil cooler system, 4-nitrogen envelope system, 5-blowdown vessel, 6-control system, 7-mobile platform, 8-condenser.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described, and embodiments of the present invention include but not limited to the following example.
Embodiment
At present, in trough type solar power generation technical field, the testing level both at home and abroad for groove type solar condenser collecting efficiency is lower, and the test macro of its routine exists many defects: equipment is huge, test is inconvenient, testing efficiency and precision low.In order to overcome the defect of prior art, present embodiments provide a kind of small-sized, high precision, high efficiency trough type solar power generation heat collector thermal efficiency detection system, as shown in Figure 1, this proving installation designs based on groove type solar condensing thermal power generation station optical field characteristics, detect the collecting efficiency of 150 meters of condenser unit under different solar radiation, temperature in and outlet temperature, thus draw the condenser collecting efficiency that different solar radiation value is corresponding, draw the efficiency curve of condenser collecting efficiency and solar radiation value.
In order to make those skilled in the art have awareness and understanding more clearly to the structure in the present invention, be described in detail below in conjunction with accompanying drawing:
Trough type solar power generation heat collector thermal efficiency detection system mainly comprises expansion drum 1, Heat-transfer Oil Pump 2, oil cooler system 3, detection system, control system 6 and online solar radiation monitoring system six part.Wherein, expansion drum, Heat-transfer Oil Pump, oil cooler system and condenser unit 8 form a closed circuit, and by circulating-heating conduction oil, to test under different solar radiations, conduction oil is at the temperature of condenser import and export, flow and pressure parameter; Online solar radiation monitoring system is used for Real-Time Monitoring solar radiation value, and it belongs to existing mature technology, therefore, does not repeat in the present embodiment.
Expansion drum, its storage inside has conduction oil, and in addition, its major function is the volumetric expansion amount produced because of temperature variation for absorbing conduction oil.Further, in order to prevent conduction oil to be oxidized because of ingress of air, expansion drum also seals system 4 with nitrogen and is communicated with.This nitrogen envelope system is made up of nitrogen cylinder group, and nitrogen envelope system is filled with nitrogen in expansion drum, avoids the conduction oil ingress of air in expansion drum and oxidized; On the other hand, the nitrogen inputed in expansion drum can apply certain pressure, emptying as low-boiling-point substance and water vapour, and keeps the liquid phase voltage regulation operation of conduction oil in expansion drum.When expansion drum systemic conduction oil swell increment is excessive; when causing pressure in expansion drum to exceed predetermined safety value; expansion drum needs release; to guarantee the safe operation of equipment; therefore; the present embodiment is ad hoc in expansion drum overpressure protection safety valve; meanwhile; expansion drum outside is provided with the blowdown vessel 5 be communicated with it; when in expansion drum, pressure exceedes predetermined safety value; conduction oil in expansion drum is entered in blowdown vessel by overpressure protection safety valve, thus reduces pressure in expansion drum, until in expansion drum within Pressure Drop to safety value.
Heat-transfer Oil Pump, as the starting point of the present invention's built-in thermal medium of writing a biography (conduction oil) working pressure, provides necessary pressure to the present invention's circulation and controls the flow of conduction oil.In the present embodiment, Heat-transfer Oil Pump system mainly comprises horizontal centrifugal pump and bypass duct thereof, and it can provide required different pressures and flow for test.During test, according to the heat conduction oil temperature of test condenser outlet, regulate centrifugal pump bypass flow, make condenser export oil temperature and reach uniform temperature; Preferably, centrifugal pump is variable frequency control electrodynamic pump, to improve suitable conduction oil pressure and flow.Further, expansion drum is positioned at the top of Heat-transfer Oil Pump, as a kind of optimal way, expansion drum is positioned at the peak of trough type solar power generation heat collector thermal efficiency detection system, it causes a positive pressure head to the Heat-transfer Oil Pump entrance being in downstream, make Heat-transfer Oil Pump suction inlet falling heat-transfer flow of oil, ensure the continual and steady operation of Heat-transfer Oil Pump.
Oil cooler system comprises variable frequency control electric refrigerating machine oil cooler and bypass duct thereof, and the two is all communicated with expansion drum with condenser, oil cooler system to act on the conduction oil temperature controlling condenser entrance be desirable value.The principle of work of oil cooler is as shown in Figure 2: conduction oil is after the heating of condenser collecting system, when the conduction oil temperature of condenser outlet is less than preset temperature, conduction oil is got back in expansion drum through oil cooler bypass, i.e. the line of lower end in oil cooler system and expansion drum two lines in Fig. 2; When the conduction oil temperature of condenser outlet is greater than preset temperature, oil cooler startup optimization, cools conduction oil to preset temperature, and then conduction oil is got back in expansion drum, i.e. the line of upper end in oil cooler system and expansion drum two lines in Fig. 2.Above-mentioned oil cooler adopts variable frequency control, automatically regulates according to thermal load.
In the present embodiment, detection system comprises conduction oil temperature, flow and pressure sensing instruments, the structure of above-mentioned instrument and realize its testing goal set-up mode and be prior art, usually detecting instrument is arranged on pipeline corresponding with it or equipment, is not repeating in the present embodiment.Further, in order to detect conduction oil flow rapidly and accurately, in the present embodiment, non-contact type ultrasonic flowmeter selected by flow detection instrument.
Control system is mainly used in the operation controlling Heat-transfer Oil Pump, oil cooler system and detection system, and as a kind of optimal way, in the present embodiment, control system is DCS control system.During test, DCS control system regulates and record test data automatically, the i.e. frequency of operation change of Heat-transfer Oil Pump, oil cooler system, the detection behavior of detection system controls by DCS control system, and DCS control system controls as existing mature technology, therefore, the present embodiment is no longer described in detail to its control principle.
In order to better realize the present embodiment, trough type solar power generation heat collector thermal efficiency detection system is integrated on mobile platform 7.Structure and the implementation thereof of mobile platform are more, and the prior art that all can have drawn from, therefore, the concrete structure of the present embodiment to mobile platform does not elaborate; It should be noted that the shape of involved mobile platform in accompanying drawing should not limit the scope of the invention.Mounted groove type solar condensing thermal power generation station condenser can be detected on the spot by efficient quick by mobile platform.
Implementation method of the present invention, comprises the following steps:
(1) online solar radiation monitoring system detects solar radiation value in real time; Conduction oil in expansion drum is delivered to condenser by Heat-transfer Oil Pump, and detection system detects the conduction oil temperature of condenser entrance, flow and pressure;
(2) after the heat-conducting oil heating in condenser heats up, through oil cooler system flowback in expansion drum, detection system detects conduction oil temperature, flow and the pressure that condenser exports;
(3) control system is according to the solar radiation value recorded in real time, the frequency of operation of different Heat-transfer Oil Pump and oil cooler system be set and repeat step (1) to (2), obtaining the conduction oil temperature of the conduction oil temperature of some groups of condenser entrances, flow and pressure and condenser outlet, flow and pressure;
(4) solar radiation value, the conduction oil temperature of condenser entrance corresponding with it, the conduction oil temperature of flow and pressure and condenser outlet, flow and the pressure that record according to all of control system, calculate the collecting efficiency of condenser under different solar radiation, draw the efficiency curve of condenser collecting efficiency and solar radiation value.
Specifically, wherein step (2) conduction oil through oil cooler system flowback to the concrete grammar of expansion drum is: when the conduction oil temperature of condenser outlet is less than preset temperature, conduction oil is back to expansion drum through oil cooler bypass; When the conduction oil temperature of condenser outlet is greater than preset temperature, oil cooler bypass is closed, and conduction oil flows into variable frequency control electric refrigerating machine oil cooler, and variable frequency control electric refrigerating machine oil cooler starts, and is cooled by conduction oil to be back to expansion drum to preset temperature.
The present invention is applicable to groove type solar condensing thermal power generation station condenser collecting efficiency and detects, and using 150 meters of light fields as test cell, makes the device miniaturization of condenser detection system, and make the test of condenser collecting efficiency more convenient.The present invention for condenser design, improve its collecting efficiency and have important facilitation; Meanwhile, analysis can be provided for the highly effective and safe at groove type solar condensing thermal power generation station runs, improve foundation.
According to above-described embodiment, just the present invention can be realized well.What deserves to be explained is; under prerequisite based on said structure design, for solving same technical matters, even if some making on the invention are without substantial change or polishing; the essence of the technical scheme adopted is still the same with the present invention, therefore it also should in protection scope of the present invention.
Claims (8)
1. the implementation method of a trough type solar power generation heat collector thermal efficiency detection system, wherein, trough type solar power generation heat collector thermal efficiency detection system comprises the expansion drum (1) storing conduction oil, the Heat-transfer Oil Pump (2) being used for conduction oil being transferred to condenser is communicated with expansion drum (1), the oil cooler system (3) be all communicated with condenser and expansion drum (1), detection system, and for controlling the control system (6) of Heat-transfer Oil Pump (2), oil cooler system (3) and detection system; Described detection system comprises conduction oil temperature, flow and pressure sensing instruments; Described control system is DCS control system, it is characterized in that, comprises the following steps:
(1) online solar radiation monitoring system detects solar radiation value in real time; Conduction oil in expansion drum is delivered to condenser by Heat-transfer Oil Pump, and detection system detects the conduction oil temperature of condenser entrance, flow and pressure;
(2) after the heat-conducting oil heating in condenser heats up, through oil cooler system flowback in expansion drum, detection system detects conduction oil temperature, flow and the pressure that condenser exports;
(3) control system is according to the solar radiation value recorded in real time, the frequency of operation of different Heat-transfer Oil Pump and oil cooler system be set and repeat step (1) to (2), obtaining the conduction oil temperature of the conduction oil temperature of some groups of condenser entrances, flow and pressure and condenser outlet, flow and pressure;
(4) solar radiation value, the conduction oil temperature of condenser entrance corresponding with it, the conduction oil temperature of flow and pressure and condenser outlet, flow and the pressure that record according to all of control system, calculate the collecting efficiency of condenser under different solar radiation, draw the efficiency curve of condenser collecting efficiency and solar radiation value.
2. the implementation method of trough type solar power generation heat collector thermal efficiency detection system according to claim 1, is characterized in that, also comprises the nitrogen be communicated with for being filled with nitrogen in expansion drum (1) with expansion drum (1) and seals system (4).
3. the implementation method of trough type solar power generation heat collector thermal efficiency detection system according to claim 1; it is characterized in that; also comprise the blowdown vessel (5) be communicated with expansion drum (1), and in expansion drum (1), be provided with the overpressure protection safety valve for controlling expansion drum (1) and blowdown vessel (5) connected state.
4. the implementation method of trough type solar power generation heat collector thermal efficiency detection system according to claim 1, is characterized in that, also comprises the online solar radiation monitoring system for Real-Time Monitoring solar radiation value.
5. the implementation method of trough type solar power generation heat collector thermal efficiency detection system according to claim 4, it is characterized in that, described oil cooler system (3) comprises variable frequency control electric refrigerating machine oil cooler and bypass duct thereof, and the two is all communicated with expansion drum (1) with condenser.
6. the implementation method of trough type solar power generation heat collector thermal efficiency detection system according to claim 5, is characterized in that, described trough type solar power generation heat collector thermal efficiency detection system is integrated on mobile platform (7).
7. the implementation method of trough type solar power generation heat collector thermal efficiency detection system according to claim 6, it is characterized in that, described expansion drum (1) is positioned at the top of Heat-transfer Oil Pump (2).
8. the implementation method of trough type solar power generation heat collector thermal efficiency detection system according to claim 1, it is characterized in that, conduction oil in described step (2) after heat temperature raising through oil cooler system flowback to the concrete grammar of expansion drum is: when the conduction oil temperature of condenser outlet is less than preset temperature, conduction oil is back to expansion drum through oil cooler bypass; When the conduction oil temperature of condenser outlet is greater than preset temperature, oil cooler bypass is closed, and conduction oil flows into variable frequency control electric refrigerating machine oil cooler, and variable frequency control electric refrigerating machine oil cooler starts, and is cooled by conduction oil to be back to expansion drum to preset temperature.
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| CN105319051B (en) * | 2015-11-24 | 2018-04-17 | 中国科学院工程热物理研究所 | A kind of workbench for being used to test trough type solar heat-collector optical efficiency |
| CN106769137B (en) * | 2016-12-09 | 2019-09-20 | 中国科学院电工研究所 | Paraboloid trough type solar heat-collector heat performance measuring apparatus and hot property prediction technique |
| CN106769136B (en) * | 2016-12-09 | 2019-04-30 | 中国科学院电工研究所 | Paraboloid trough type solar heat-collector thermal efficiency dynamic measurement device and measurement method |
| CN108181933B (en) * | 2017-12-31 | 2021-05-28 | 内蒙古旭宸能源有限公司 | Tracking control method for trough type solar system |
| CN108413624A (en) * | 2018-03-26 | 2018-08-17 | 拉萨市城关区地毯厂 | Based on the vegetable colour preparation system that solar groove type heat collector is heat source |
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Effective date of registration: 20210107 Address after: 195a, 17 houyongkang Hutong, Dongcheng District, Beijing Patentee after: TIANWEI NEW ENERGY SYSTEM ENGINEERING BEIJING Co.,Ltd. Address before: 610000 No.1 Tianwei Road, Industrial Development Zone, Southwest Airport Economic Development Zone, Shuangliu County, Chengdu City, Sichuan Province Patentee before: Tianwei (Chengdu) Solar Thermal Power Development Co.,Ltd. |