CN103335823A - Trough-type solar thermal power generation collector thermal efficiency detecting system and implementation method thereof - Google Patents
Trough-type solar thermal power generation collector thermal efficiency detecting system and implementation method thereof Download PDFInfo
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Abstract
The invention discloses a trough-type solar thermal power generation collector thermal efficiency detecting system which solves the problems of bulky equipment, low testing efficiency, inconvenience in testing and the like of an optical concentrator testing system in the prior art. The trough-type solar thermal power generation collector thermal efficiency detecting system is characterized by comprising an expansion tank (1) containing heat transfer oil, a heat-transfer oil pump (2) communicated with the expansion tank (1) and used for transferring the heat transfer oil to an optical concentrator, an oil cooler system (3) communicated with both the optical concentrator and the expansion tank (1), a detecting system, and a control system (6) for controlling the heat-transfer oil pump (2), the oil cooler system (3) and the detecting system. On the basis, the invention further discloses an implementation method of the trough-type solar thermal power generation collector thermal efficiency detecting system, thereby filling up a blank in the conventional trough-type solar thermal power generation collector thermal efficiency detecting system, and not only novelty but also high practicability and creativeness are achieved.
Description
Technical field
The invention belongs to the 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 of quick growth.China is not only consuming non-renewable resources such as coal sharp based on the electric structure of coal, and serious environment pollution, is unfavorable for environmental protection, causes China to be faced with the severe challenge of energy resources and environment two aspects.Develop reproducible green, clean energy resourcies such as sun power, wind energy and biomass energy energetically, can safeguard environment effectively than the consumption of low-resource and the energy.
At present, both at home and abroad in the high-temperature solar generating for many years large-scale commercial applications application experience has been arranged, wherein ripe with groove type solar optically focused heat generating system.The hot generation technology of groove type solar optically focused mainly be utilize groove type paraboloid mirror (condenser) with solar light focusing on a line, by the solar radiant energy after tubulose heat absorption device (thermal-collecting tube) the absorption focusing of installing at this focal line, simultaneously, fill in the thermal-arrest organ pipe for the fluid working substance (conduction oil) that absorbs solar radiant energy, by pipeline heated working medium is delivered to steam generator (solar boiler) then, produce superheated vapor and send into the steam turbine generator system generating, thereby finish the conversion of solar energy to electrical.
The collecting efficiency that detects condenser is an important technology index in the trough type solar power generation.In the prior art, the routine inspection of condenser collecting efficiency is the detection of making whole light field condenser, and the required heat conduction oil mass of this kind test mode is very big, 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 that reliable, simple and direct testing apparatus is used for groove type solar optically focused thermal power station condenser collecting efficiency, just become those skilled in the art's primary study content.
Summary of the invention
The objective of the invention is to overcome above-mentioned defective, 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 that stores conduction oil, be communicated with the Heat-transfer Oil Pump that is used for conduction oil is transferred to condenser with expansion drum, the oil cooler system that all is communicated with condenser and expansion drum, detection system, and the control system that is used for control Heat-transfer Oil Pump, oil cooler system and detection system.
In order to prevent conduction oil because of the ingress of air oxidation, the present invention also comprises with expansion drum and being communicated with for the nitrogen envelope system that charges into nitrogen in expansion drum.This nitrogen envelope system is made up of the nitrogen cylinder group, and nitrogen envelope system charges into nitrogen in expansion drum, keep the expansion drum internal pressure constant.
In order to guarantee that the expansion drum internal pressure remains at below the safety value, the present invention also comprises the blowdown vessel that is communicated with expansion drum, and is provided with the overpressure protection safety valve for control expansion drum and blowdown vessel connected state in expansion drum.When the expansion drum internal pressure surpassed setting value (safety value), the conduction oil in the expansion drum entered in the blowdown vessel, thereby reduced the expansion drum internal pressure, was down in the safety value until the expansion drum internal pressure.
Further, the present invention also comprises for the online solar radiation monitoring system of monitoring solar radiation value in real time.
Specifically, described detection system comprises conduction oil temperature, flow and pressure detection instrument; Described control system is the DCS control system.
Further again, described oil cooler system comprises variable frequency control electric refrigerating machine oil cooler and bypass duct thereof, and the two all is communicated with condenser and expansion drum.
For efficient quick detects mounted groove type solar optically focused thermal power station condenser on the spot, described trough type solar power generation heat collector thermal efficiency detection system is integrated on the mobile platform.
In order to guarantee 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's peak, and the Heat-transfer Oil Pump entrance that is in the downstream is caused a positive pressure head, makes Pump Suction Nozzle be full of fluid, guarantees the continual and steady operation of Heat-transfer Oil Pump.
On the basis of said structure, the present invention also provides the implementation method of this trough type solar power generation heat collector thermal efficiency detection system, may further comprise the steps:
(1) online solar radiation monitoring system detects solar radiation value in real time; Heat-transfer Oil Pump is delivered to condenser with the conduction oil in the expansion drum, and detection system detects conduction oil temperature, flow and the pressure of condenser entrance;
(2) after the heat-conducting oil heating in the condenser heats up, be back in the expansion drum through the oil cooler system, detection system detects conduction oil temperature, flow and the pressure of condenser outlet;
(3) control system is according to the solar radiation value that records in real time, the frequency of operation of different Heat-transfer Oil Pump and oil cooler system and repeating step (1) are set to (2), obtain conduction oil temperature, flow and the pressure of some groups of condenser entrances and conduction oil temperature, flow and the pressure of condenser outlet;
(4) control system is according to all solar radiation value that record, conduction oil temperature, flow and the pressure of corresponding condenser entrance and conduction oil temperature, flow and the pressure of condenser outlet import computing machine with it, calculate the collecting efficiency of condenser under the different solar radiations, draw the efficiency curve of condenser collecting efficiency and solar radiation value.
Wherein, the conduction oil in the described step (2) behind the heat temperature raising through the concrete grammar that the oil cooler system is back to expansion drum is: when the conduction oil temperature of condenser outlet during less than preset temperature, conduction oil is back to expansion drum through the oil cooler bypass; When the conduction oil temperature of condenser outlet during greater than preset temperature, the 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 conduction oil is cooled is back to expansion drum to preset temperature.
The present invention compared with prior art has the following advantages and beneficial effect:
(1) all devices all is integrated on the mobile platform among the present invention, thereby can detect mounted groove type solar optically focused thermal power station condenser on the spot by efficient quick, overcome the defective that the equipment of condenser detection system is huge in the prior art, detection efficiency is low, detection is inconvenient effectively.
(2) closed circuit is formed in expansion drum, Heat-transfer Oil Pump, oil cooler system and condenser unit among the present invention, by circulation heating conduction oil, to test under different solar radiations, conduction oil is at temperature, flow and the pressure parameter of condenser import and export, thereby obtain the condenser efficiency curve relevant with solar radiation (temperature), and the operation of proving installation is controlled by control system, and not only testing efficiency height, and test more comprehensively, accurately.
(3) online solar radiation monitoring system can be monitored solar radiation value in real time among the present invention, and control system is adjusted test parameter according to monitor value, has improved real-time and the degree of accuracy of test further.
(4) nitrogen envelope system can prevent that conduction oil is because of the ingress of air oxidation among the present invention, blowdown vessel is used for then guaranteeing that the expansion drum internal pressure is in below the safety value all the time, and above-mentioned two parts have been guaranteed normal, the safe operation of trough type solar power generation heat collector thermal efficiency detection system.
(5) the present invention not only possesses novelty and creativeness compared to existing technologies, and easily manufactured, with low cost, applies on a large scale for it, has established solid foundation.
Description of drawings
Fig. 1 is system chart of the present invention.
Fig. 2 is fundamental diagram of the present invention.
Wherein, the parts name of mark correspondence is called in the accompanying drawing:
The 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
The invention will be further described below in conjunction with drawings and Examples, and embodiments of the present invention include but not limited to the following example.
Embodiment
At present, in the trough type solar power generation technical field, lower for the testing level of groove type solar condenser collecting efficiency both at home and abroad, there are many defectives in its conventional test macro: equipment is huge, test is inconvenient, testing efficiency and precision are low.In order to overcome the defective of prior art, present embodiment provides 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 is based on groove type solar optically focused thermal power station light field characteristics design, detect 150 meters condenser unit collecting efficiencies under different solar radiations, temperature in and outlet temperature, thereby draw the condenser collecting efficiency of different solar radiation value correspondences, draw the efficiency curve of condenser collecting efficiency and solar radiation value.
Be familiar with more clearly and understand in order to make those skilled in the art have the structure among 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 parts.Wherein, expansion drum, Heat-transfer Oil Pump, oil cooler system and condenser unit 8 are formed a closed circuit, and by circulation heating conduction oil, under different solar radiations, conduction oil is at temperature, flow and the pressure parameter of condenser import and export with test; Online solar radiation monitoring system is used for monitoring solar radiation value in real time, and it belongs to existing mature technology, therefore, does not give unnecessary details in the present embodiment.
Expansion drum, its storage inside has conduction oil, and in addition, its major function is for absorbing the volumetric expansion amount that conduction oil produces because of temperature variation.Further, in order to prevent conduction oil because of the ingress of air oxidation, expansion drum also is communicated with nitrogen envelope system 4.This nitrogen envelope system is made up of the nitrogen cylinder group, and nitrogen envelope system charges into nitrogen in expansion drum, avoids the interior conduction oil ingress of air of expansion drum and oxidized; On the other hand, the nitrogen that inputs in the expansion drum can apply certain pressure, as the emptying of low-boiling-point substance and water vapour, and the liquid phase voltage regulation operation of the interior conduction oil of maintenance expansion drum.When the systemic conduction oil swell increment of expansion drum excessive; when causing the expansion drum internal pressure to surpass the predetermined safe value; expansion drum needs release; to guarantee the safe operation of equipment; therefore; present embodiment is ad hoc in expansion drum an overpressure protection safety valve; meanwhile; the expansion drum outside is provided with the blowdown vessel 5 that is communicated with it; when the expansion drum internal pressure surpasses the predetermined safe value; conduction oil in the expansion drum enters in the blowdown vessel by the overpressure protection safety valve, thereby reduces the expansion drum internal pressure, is down in the safety value until the expansion drum internal pressure.
Heat-transfer Oil Pump is as the starting point of the built-in thermal medium of writing a biography of the present invention (conduction oil) working pressure, necessary pressure is provided and controls the flow of conduction oil to the present invention's circulation.In the present embodiment, the 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 conduction oil temperature of test condenser outlet, regulate the centrifugal pump bypass flow, make condenser export oily temperature and reach uniform temperature; Preferably, centrifugal pump is the 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 that is in the downstream, make Heat-transfer Oil Pump suction inlet falling heat-transfer flow of oil, guarantee the continual and steady operation of Heat-transfer Oil Pump.
The oil cooler system comprises variable frequency control electric refrigerating machine oil cooler and bypass duct thereof, and the two all is communicated with condenser and expansion drum, the oil cooler system to act on the conduction oil temperature of controlling the condenser entrance be desirable value.The principle of work of oil cooler is as shown in Figure 2: conduction oil through the heating of condenser collecting system after, when the conduction oil temperature of condenser outlet during less than preset temperature, conduction oil is got back in the expansion drum through the oil cooler bypass, i.e. the line of lower end in two lines of oil cooler system and expansion drum among Fig. 2; When the conduction oil temperature of condenser outlet during greater than preset temperature, oil cooler starts operation, and conduction oil is cooled to preset temperature, and conduction oil is got back in the expansion drum then, i.e. line in two lines of oil cooler system and expansion drum among Fig. 2.Above-mentioned oil cooler adopts variable frequency control, regulates automatically according to thermal load.
Detection system comprises conduction oil temperature, flow and pressure detection instrument in the present embodiment, the structure of above-mentioned instrument and realize that its testing goal set-up mode is prior art, usually detecting instrument is arranged on the corresponding with it pipeline or equipment, is not giving unnecessary details in the present embodiment.Further, in order to detect the conduction oil flow rapidly and accurately, the flow detection instrument is selected the non-contact type ultrasonic flowmeter for use in the present embodiment.
Control system is mainly used in controlling the operation of Heat-transfer Oil Pump, oil cooler system and detection system, and as a kind of optimal way, control system is the DCS control system in the present embodiment.During test, the DCS control system is regulated and record test data automatically, the frequency of operation that is Heat-transfer Oil Pump, oil cooler system changes, the detection behavior of detection system is controlled by the DCS control system, and the DCS control system is controlled to be existing mature technology, therefore, present embodiment no longer is elaborated to its control principle.
In order better to realize present embodiment, trough type solar power generation heat collector thermal efficiency detection system is integrated on the mobile platform 7.Structure and the implementation thereof of mobile platform are more, and the prior art that all can have drawn from, and therefore, present embodiment does not elaborate to the concrete structure of mobile platform; Shape that it should be noted that related mobile platform in the accompanying drawing should not limit protection scope of the present invention.Can detect mounted groove type solar optically focused thermal power station condenser on the spot by efficient quick by mobile platform.
Implementation method of the present invention may further comprise the steps:
(1) online solar radiation monitoring system detects solar radiation value in real time; Heat-transfer Oil Pump is delivered to condenser with the conduction oil in the expansion drum, and detection system detects conduction oil temperature, flow and the pressure of condenser entrance;
(2) after the heat-conducting oil heating in the condenser heats up, be back in the expansion drum through the oil cooler system, detection system detects conduction oil temperature, flow and the pressure of condenser outlet;
(3) control system is according to the solar radiation value that records in real time, the frequency of operation of different Heat-transfer Oil Pump and oil cooler system and repeating step (1) are set to (2), obtain conduction oil temperature, flow and the pressure of some groups of condenser entrances and conduction oil temperature, flow and the pressure of condenser outlet;
(4) control system is according to all solar radiation value that record, conduction oil temperature, flow and the pressure of corresponding condenser entrance and conduction oil temperature, flow and the pressure of condenser outlet with it, calculate the collecting efficiency of condenser under the different solar radiations, draw the efficiency curve of condenser collecting efficiency and solar radiation value.
Specifically, wherein step (2) conduction oil through the concrete grammar that the oil cooler system is back to expansion drum is: when the conduction oil temperature of condenser outlet during less than preset temperature, conduction oil is back to expansion drum through the oil cooler bypass; When the conduction oil temperature of condenser outlet during greater than preset temperature, the 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 conduction oil is cooled is back to expansion drum to preset temperature.
The present invention is applicable to that groove type solar optically focused thermal power station condenser collecting efficiency detects, and as test cell, makes the device miniaturization of condenser detection system with 150 meters light fields, and feasible more convenient to the test of condenser collecting efficiency.The present invention has important facilitation for its collecting efficiency of design, improvement and raising of condenser; Simultaneously, can provide analysis for the highly effective and safe operation of groove type solar optically focused thermal power station, improve foundation.
According to above-described embodiment, just can realize the present invention well.What deserves to be explained is; under the prerequisite based on said structure design, for solving same technical matters, even some that make in the present invention do not have substantial change or polishing; the essence of the technical scheme that adopts is still the same with the present invention, so it also should be in protection scope of the present invention.
Claims (10)
1. trough type solar power generation heat collector thermal efficiency detection system, it is characterized in that: comprise the expansion drum (1) that stores conduction oil, be communicated with the Heat-transfer Oil Pump (2) that is used for conduction oil is transferred to condenser with expansion drum (1), the oil cooler system (3) that all is communicated with condenser and expansion drum (1), detection system, and the control system (6) that is used for control Heat-transfer Oil Pump (2), oil cooler system (3) and detection system.
2. trough type solar power generation heat collector thermal efficiency detection system according to claim 1 is characterized in that, also comprises with expansion drum (1) being communicated with for the nitrogen envelope system (4) that charges into nitrogen in expansion drum (1).
3. 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) that is communicated with expansion drum (1), and in expansion drum (1), be provided with for the overpressure protection safety valve of control expansion drum (1) with blowdown vessel (5) connected state.
4. trough type solar power generation heat collector thermal efficiency detection system according to claim 1 is characterized in that, also comprises for the online solar radiation monitoring system of monitoring solar radiation value in real time.
5. according to each described trough type solar power generation heat collector thermal efficiency detection system of claim 1 to 4, it is characterized in that described detection system comprises conduction oil temperature, flow and pressure detection instrument; Described control system is the DCS control system.
6. trough type solar power generation heat collector thermal efficiency detection system according to claim 5, 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 all is communicated with condenser and expansion drum (1).
7. trough type solar power generation heat collector thermal efficiency detection system according to claim 6 is characterized in that, described trough type solar power generation heat collector thermal efficiency detection system is integrated on the mobile platform (7).
8. trough type solar power generation heat collector thermal efficiency detection system according to claim 7 is characterized in that described expansion drum (1) is positioned at the top of Heat-transfer Oil Pump (2).
9. by the implementation method of each described trough type solar power generation heat collector thermal efficiency detection system of claim 1 to 8, it is characterized in that, may further comprise the steps:
(1) online solar radiation monitoring system detects solar radiation value in real time; Heat-transfer Oil Pump is delivered to condenser with the conduction oil in the expansion drum, and detection system detects conduction oil temperature, flow and the pressure of condenser entrance;
(2) after the heat-conducting oil heating in the condenser heats up, be back in the expansion drum through the oil cooler system, detection system detects conduction oil temperature, flow and the pressure of condenser outlet;
(3) control system is according to the solar radiation value that records in real time, the frequency of operation of different Heat-transfer Oil Pump and oil cooler system and repeating step (1) are set to (2), obtain conduction oil temperature, flow and the pressure of some groups of condenser entrances and conduction oil temperature, flow and the pressure of condenser outlet;
(4) control system is according to all solar radiation value that record, conduction oil temperature, flow and the pressure of corresponding condenser entrance and conduction oil temperature, flow and the pressure of condenser outlet with it, calculate the collecting efficiency of condenser under the different solar radiations, draw the efficiency curve of condenser collecting efficiency and solar radiation value.
10. the implementation method of trough type solar power generation heat collector thermal efficiency detection system according to claim 9, it is characterized in that, conduction oil in the described step (2) behind the heat temperature raising through the concrete grammar that the oil cooler system is back to expansion drum is: when the conduction oil temperature of condenser outlet during less than preset temperature, conduction oil is back to expansion drum through the oil cooler bypass; When the conduction oil temperature of condenser outlet during greater than preset temperature, the 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 conduction oil is cooled is back to expansion drum to preset temperature.
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| CN106769136B (en) * | 2016-12-09 | 2019-04-30 | 中国科学院电工研究所 | Dynamic measuring device and measuring method of thermal efficiency of parabolic trough solar collector |
| CN106769137B (en) * | 2016-12-09 | 2019-09-20 | 中国科学院电工研究所 | Thermal performance measurement device and thermal performance prediction method of parabolic trough solar collector |
| CN108181933A (en) * | 2017-12-31 | 2018-06-19 | 内蒙古旭宸能源有限公司 | Groove type solar system tracking and controlling method |
| 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 |
| CN110530660A (en) * | 2019-05-05 | 2019-12-03 | 双良龙腾光热技术(北京)有限公司 | A kind of slot type photo-thermal power station loop performance detection system and its detection method |
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