CN112834922B - Double-machine parallel test bed of closed Brayton cycle power generation system - Google Patents
Double-machine parallel test bed of closed Brayton cycle power generation system Download PDFInfo
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Abstract
The invention relates to a double-machine parallel test bed of a closed Brayton cycle power generation system, and belongs to the technical field of power generation tests of ground equipment. The double-machine parallel test bed can realize double-machine joint adjustment of the Brayton cycle power generation, and provides important guarantee for the research of multiple-machine joint and double-machine matching technology of the Brayton cycle power generation. The simulation test stand includes: two principle prototypes, two regenerators, a heater and a cooler; the peripheral device includes: an air charging unit and a cooling water unit; the heater, the two principle prototypes, the two regenerators and the cooler form a closed test loop, wherein the two principle prototypes are arranged in parallel, and each principle prototype is correspondingly provided with one regenerator; the heater provides the same pressure and temperature test conditions for the two principle prototypes, and the cooler reduces the temperature of the working medium with temperature discharged by the two principle prototypes to the normal temperature.
Description
Technical Field
The invention relates to a double-machine parallel ground simulation test bed, in particular to a high-temperature closed circulation double-machine parallel power generation simulation test bed, and belongs to the technical field of ground equipment power generation tests.
Background
The brayton cycle power generation technology is a special turbine power generation technology in which working media repeatedly participate in cycle power generation, only exchanges energy with the outside, does not exchange substances, and has wide application prospects in special environments such as deep space, deep sea and the like.
The construction of the closed cycle test universal platform with double-machine test capability can provide important guarantee for the study of the multiple-machine-connected double-machine matching technology of the Brayton cycle power generation, lay a foundation for the later multi-stage parallel technology and lay a foundation for the topic development and declaration of the power generation equipment with higher power.
Disclosure of Invention
In view of the above, the invention provides a double-machine parallel test stand of a closed Brayton cycle power generation system, which can realize double-machine joint adjustment of Brayton cycle power generation and provides important guarantee for the research of multiple-machine joint and double-machine matching technology of Brayton cycle power generation.
The double-machine parallel test bed of the closed Brayton cycle power generation system comprises: two principle prototypes, two regenerators, a heater and a cooler; the peripheral device includes: an air charging unit and a cooling water unit;
two principle prototypes are arranged in parallel, and each principle prototype is correspondingly provided with a heat regenerator; the two principle prototypes are respectively a principle prototype A and a principle prototype B; the two regenerators are a regenerator A and a regenerator B respectively;
the heater is used for providing the same pressure and temperature test conditions for the two principle prototypes; the air charging unit is communicated with the heater through a pipeline and is used for providing a gas working medium for the test bed;
the cooler is used for reducing the temperature of the gas working medium discharged by the two principle prototypes to a set value, and cooling water in the cooler is provided by the cooling water unit;
the exhaust port of the heater is respectively communicated with the turbine inlet of the principle prototype A and the turbine inlet of the principle prototype B through two branch pipelines; the air inlet of the heater is communicated with the cold end outlet of the heat regenerator A and the cold end outlet of the heat regenerator B through two branch pipelines;
the gas working medium inlet of the cooler is respectively communicated with the hot end outlet of the heat regenerator A and the hot end outlet of the heat regenerator B through two branch pipelines; the gas working medium outlet of the cooler is respectively communicated with the inlet of the principle prototype A compressor and the inlet of the principle prototype B compressor through two branch pipelines;
the outlet of the principle prototype A turbine is communicated with the hot end inlet of the heat regenerator A through a pipeline, and the outlet of the principle prototype A compressor is communicated with the cold end inlet of the heat regenerator A through a pipeline;
the outlet of the principle prototype B turbine is communicated with the hot end inlet of the heat regenerator B through a pipeline, and the outlet of the principle prototype B compressor is communicated with the cold end inlet of the heat regenerator B through a pipeline;
the vacuum pump is communicated with the inner airflow channel of the heater through a vacuum pipeline.
As a preferred mode of the present invention: a detachable flange B is arranged on a branch pipeline of the heater exhaust port communicated with the turbine inlet of the principle model machine B;
a detachable flange D is arranged on a branch pipeline of the heater air inlet communicated with the cold end outlet of the heat regenerator B;
a detachable flange A is arranged on a branch pipeline which is communicated with a gas working medium inlet of the cooler and a hot end outlet of the heat regenerator B;
a detachable flange C is arranged on a branch pipeline of the cooler exhaust port communicated with the inlet of the compressor of the principle model machine B.
As a preferred mode of the present invention: the air inlet of the heater is communicated with the cold end outlet of the heat regenerator A, the gas working medium inlet of the cooler is communicated with the hot end outlet of the heat regenerator A and the hot end outlet of the heat regenerator B, the gas outlet of the cooler is communicated with the gas inlet of the principle model machine A and the gas inlet of the principle model machine B, the gas outlet of the principle model machine A is communicated with the cold end inlet of the heat regenerator A, and the gas outlet of the principle model machine B is communicated with the cold end inlet of the heat regenerator B.
As a preferred mode of the present invention: the air charging unit is connected with an air charging pressure regulating valve on the heater, and the air charging pressure regulating valve is used for pre-charging a working medium to a set initial pressure for the test bed after the test bed is vacuumized.
As a preferred mode of the present invention: a high Wen Qieduan valve is provided on the line connected to the heater inlet.
As a preferred mode of the present invention: and providing process gas for the high-temperature cut-off valve through the inflation unit.
As a preferred mode of the present invention: the air source in the inflation unit is communicated with the heater through a pipeline which is sequentially provided with a manual stop valve, an electric stop valve, a primary pressure reducing valve, a primary safety valve, an electric stop valve, a secondary pressure reducing valve, a secondary safety valve and a solenoid valve B.
As a preferred mode of the present invention: the air charging unit also comprises a filter, wherein the filter is positioned behind the manual valve stop valve and is used for filtering air source impurities.
As a preferred mode of the present invention: the heater is an electromagnetic induction graphite heat accumulating heater.
As a preferred mode of the present invention: the cooler adopts a single-stage shell-and-tube heat exchanger, a cooling water tube pass and a gas working medium tube pass; the cooling water provided by the cooling water unit enters the cooler from a cooling water inlet of the cooler; and the cooling water flows out from a cooling water outlet of the cooler after heat exchange is completed in the cooler, and the cooling water outlet of the cooler is communicated with a water return pipeline of the cooling water unit through a pipeline.
The working principle of the test bed is as follows:
the heater, the principle prototype, the regenerator and the cooler form a closed test loop. The inlet of the compressor of the principle model machine needs normal temperature and pressure working medium, and the inlet of the turbine of the principle model machine needs high temperature and high pressure working medium. Therefore, a heater is connected in series between the turbine inlet and the compressor outlet to heat the high-pressure working medium from the compressor, the heated high-temperature high-pressure working medium impacts the turbine, and the turbine does work more than the consumed work of the compressor and the high-speed motor, so that the power generation of the principle model machine is realized.
A cooler is connected in series between the turbine outlet and the compressor inlet, and the normal-pressure high-temperature working medium with waste heat from the turbine outlet is cooled to normal-temperature normal-pressure working medium; thereby ensuring the working medium to circularly work in the closed flow channel.
In order to reduce energy waste, a heat regenerator is connected in series on the flow channel to absorb the waste heat of working medium at the outlet of the turbine, and the working medium from the compressor can be preheated and then flows into the heater so as to save the electric energy of the heater.
Two sets of identical principle prototype and regenerator are connected in parallel between the heater and the cooler for testing, so as to realize the brayton cycle power generation double-machine joint adjustment, and to find the double-machine matching rule, thereby laying a foundation for the subsequent multi-machine parallel technology. The beneficial effects are that:
(1) The test bed can realize the double-machine joint debugging of the Brayton cycle power generation, and provides important guarantee for the research of the multiple-machine joint debugging and double-machine matching technology of the Brayton cycle power generation.
(2) In actual work, the test bed has successfully completed the power generation test of nitrogen, and under the working medium of nitrogen, the maximum power generation power of a single principle prototype reaches 25kW, and the maximum power generation power of two principle prototypes exceeds 50kW. The test bed has the parallel test capability of a single machine and a double machine, can lay a foundation for the later multistage parallel technology and lay a foundation for the problem development and declaration of larger-power generation equipment, and means that the special turbine power generation technology is expected to provide high-power and long-time electric energy for space aircrafts and provides a bright prospect for the expansion of engines to deep space and deep sea.
(3) The heater of the test bed adopts an electromagnetic induction graphite heat accumulating type heater, can provide the same pressure and temperature test conditions for two principle prototypes, can provide bearable limit temperature for the principle prototypes, and can continuously and uninterruptedly work for a long time.
(4) The temperature of the working medium with temperature discharged by the two principle prototypes is reduced to normal temperature through the cooler, so that the circulation of the working medium can be smoothly carried out.
(5) Through the arrangement of the detachable flange in the pipeline, the test bed can realize the switching between a single machine test and a double-machine parallel test.
(6) The heat regenerator is arranged outside the engine (namely, the principle model machine), so that the internal structure of the engine can be simplified, the design difficulty of the engine is reduced, and the development success rate of products is improved.
Drawings
FIG. 1 is a schematic diagram of a double-machine parallel test stand of a closed Brayton cycle power generation system of the present invention;
FIG. 2 is an example connection schematic diagram of a dual parallel test stand of the present invention;
wherein: 1-solenoid valve A, 2-solenoid valve B, 3-charge pressure regulating valve, 4-vacuum pump, 5-heater, 6-heater vent, 7-hose A, 8-regenerator A cold end outlet, 9-removable flange A, 10-hose B, 11-regenerator A hot end outlet, 12-regenerator A, 13-regenerator A cold end inlet, 14-regenerator A hot end inlet, 15-principle prototype A turbine outlet, 16-cooler gas working medium inlet, 17-cooler cooling water outlet, 18-cooler cooling water inlet, 19-cooler, 20-cooler gas working medium outlet, 21-hose C, 22-principle prototype A turbine inlet, 23-flowmeter A, 24-principle prototype A compressor outlet 25-principle prototype A, 26-principle prototype A compressor inlet, 27-hose C, 28-removable flange B, 29-principle prototype B turbine inlet, 30-removable flange C, 31-flowmeter B, 32-hose D, 33-principle prototype B compressor inlet, 34-principle prototype B, 35-principle prototype B compressor outlet, 36-hose E, 37-principle prototype B turbine outlet, 38-regenerator B hot end inlet, 39-regenerator B cold end inlet, 40-regenerator B, 41-regenerator B hot end outlet, 42-regenerator B cold end outlet, 43-hose F, 44-hose G, 45-heater inlet, 46-high temperature ball valve, 47-removable flange D, 48-second-level relief valve, 49-second-level relief valve, 50-motorised valve, 51-deflating solenoid valve, 52-first-level relief valve, 53-first-level relief valve, 54-motorised stop valve, 55-filter, 56-manual stop valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1:
the embodiment provides a double-machine parallel test bed of a closed Brayton cycle power generation system, wherein a heater for the test bed continuously provides high-temperature air flow of up to 1400K for the turbine inlets of two principle prototype machines, and simultaneously, the cooler is utilized to exchange heat to take away redundant heat of working media, so that normal-temperature air flow required by the principle prototype machine inlets is ensured, and the repeated use of the working media in a pipeline is realized.
As shown in fig. 1, the simulation test stand includes: two principle prototypes (principle prototypes a25 and B34, respectively), two regenerators (regenerator a12 and B40, respectively), heater 5 and cooler 19; the peripheral device includes: an air charging unit and a cooling water unit; the heater, the two principle prototypes, the two regenerators and the cooler form a closed test loop, wherein the two principle prototypes are arranged in parallel, and each principle prototype is correspondingly provided with one regenerator; the heater provides test conditions with the same pressure and temperature for the two principle prototypes, and the cooler reduces the temperature of working medium with temperature discharged by the two principle prototypes to normal temperature.
The two principle prototypes have the same structure and internally comprise a turbine, a gas compressor, a high-speed motor and a controller; wherein the turbine, the compressor and the high-speed motor are packaged in the same shell; each principle prototype is provided with four airflow interfaces, namely a compressor inlet, a compressor outlet, a turbine inlet and a turbine outlet;
the structure of the two regenerators is the same, and each regenerator is provided with four airflow interfaces, which are respectively: the device comprises a regenerator cold end inlet, a regenerator cold end outlet, a regenerator hot end inlet and a regenerator hot end outlet.
The cooling water in the cooler 19 is supplied from a cooling water unit, and the cooler 19 is used for cooling the gas entering the inside thereof. The cooler 19 in this embodiment adopts a single-stage shell-and-tube heat exchanger, the cooling water passes through a tube pass, and the gas passes through a shell pass, so that indirect heat exchange between the cooling water and the gas is ensured, and the high-temperature gas is changed into normal temperature. Specific: the cooler 19 is provided with a cooler cooling water inlet 18, a cooler cooling water outlet 17, a cooler gas working medium inlet 16 and a cooler gas working medium outlet 20. The cooler cooling water inlet 18 is communicated with a water inlet pipeline of an external cooling water unit through a pipeline, and cooling water provided by the external cooling water unit enters the cooler 19 from the cooler cooling water inlet 18 at the lower side; after the heat exchange of the cooling water in the cooler 19 is completed, the cooling water flows out from the cooling water outlet 17 of the upper side cooler, and the cooling water outlet 17 of the cooler is communicated with the water return pipeline of the cooling water unit through a pipeline.
The heater 5 is for heating the gas entering the internal gas passage thereof through the heater gas inlet 45. In the embodiment, the heater 5 adopts an electromagnetic induction graphite heat accumulating type heater; the heater 5 is provided at the bottom with a heater inlet 45 communicating with its internal air flow passage and at the top with a heater outlet 6 communicating with its internal air flow passage.
The heater exhaust port 6 is respectively communicated with the principle prototype A turbine inlet 22 and the principle prototype B turbine inlet 29 through branch pipelines; the heater air inlet 45 is communicated with the cold end outlet 8 of the heat regenerator A and the cold end outlet 42 of the heat regenerator B through branch pipelines; the cooler gas working medium inlet 16 is communicated with the hot end outlet 10 of the heat regenerator A and the hot end outlet 41 of the heat regenerator B through branch pipes; the cooler gas working medium outlet 20 is communicated with the principle prototype A compressor inlet 26 and the principle prototype B compressor inlet 33 through branch pipelines; the principle prototype A turbine outlet 15 is communicated with the hot end inlet 14 of the heat regenerator A through a pipeline, and the principle prototype A compressor outlet 24 is communicated with the cold end inlet of the heat regenerator A through a pipeline; the principle prototype B turbine outlet 37 is communicated with the hot end inlet 38 of the heat regenerator B through a pipeline, and the principle prototype B compressor outlet 35 is communicated with the cold end inlet 39 of the heat regenerator B through a pipeline; thereby forming a closed gas circuit.
The vacuum pump 4 is communicated with an air flow channel in the heater 5 through a vacuum pipeline, a switch valve is arranged on a connecting pipeline of the vacuum pump 4 and the heater 5, the separation and the communication of the vacuum pump 4 and the heater 5 are ensured, and the vacuum pump 4 is used for vacuumizing a closed test loop.
The air charging unit is connected with an air charging pressure regulating valve 3 arranged on the heater 5 through a pipeline and is used for providing a gas working medium for the test bed and simultaneously providing driving gas for the high-temperature ball valve 46.
As shown in fig. 2, in particular:
the heater 5 is cylindrical in shape, the bottom is provided with a heater air inlet 45, the top is provided with a heater air outlet 6, the vacuum pump 4 is connected with the heater 5 through a vacuum pipeline provided with a switch valve so as to be communicated with an air flow channel in the heater 5, and the whole pipeline of the test bed is completely vacuumized and then stopped and isolated through the vacuum pump 4 before the test is started; the inflation pressure regulating valve 3 on the heater 5 is used for pre-charging the working medium to the appointed initial pressure for the test bed after the test bed is vacuumized.
The heater exhaust port 6 is coaxially arranged with the heater 5 and is positioned at the upper end of the heater 5; one end of the heater exhaust pipeline is connected with the heater exhaust port 6, the other end of the heater exhaust pipeline extends upwards to form two branches, one branch is communicated with the principle prototype A turbine inlet 22, and the other branch is communicated with the principle prototype B turbine inlet 29; and a removable flange B28 is provided on a branch communicating with the principle prototype B turbine inlet 29.
The high Wen Qieduan valve 46 is arranged on the air inlet pipeline of the heater connected with the air inlet 45 of the heater, and the high Wen Qieduan valve 46 is a high-temperature straight-through pneumatic stop valve, so that the flow of air can be stopped rapidly when a fault that the test piece cannot stop automatically occurs. One end of the heater air inlet pipeline is communicated with the heater air inlet 45, the other end of the heater air inlet pipeline is divided into two branches, one branch is communicated with the cold end outlet 8 of the heat regenerator A through a pipeline provided with a hose A7, and the other branch is communicated with the cold end outlet 42 of the heat regenerator B through a pipeline provided with a hose G44 and a detachable flange D47.
One end of a cooler gas working medium inlet pipeline is communicated with a cooler gas working medium inlet 16, the other end of the cooler gas working medium inlet pipeline is divided into two branches, one branch is communicated with a heat end outlet 11 of a heat regenerator A through a pipeline provided with a hose B10, and the other branch is communicated with a heat end outlet 41 of the heat regenerator B through a pipeline provided with a detachable flange A9 and a hose F43.
One end of a cooler gas working medium outlet pipeline is connected with a cooler exhaust port 20, and a flowmeter A23 is arranged on the pipeline connected with the cooler exhaust port 20; the other end is divided into two branches, one branch is communicated with the principle model machine A compressor inlet 26 through a pipeline provided with a hose C27, and the other branch is communicated with the principle model machine B compressor inlet 33 through a pipeline provided with a detachable flange C30, a flowmeter B31 and a hose D32 in sequence.
The air compressor outlet 24 of the principle model machine A is directly communicated with the cold end inlet 13 of the heat regenerator A through a pipeline provided with a hose C21; the principle model machine A turbine outlet 15 is directly connected with the hot end inlet 14 of the heat regenerator A by a pipeline. The air compressor outlet 35 of the principle model machine B is directly communicated with the cold end inlet 39 of the heat regenerator B by a pipeline provided with a hose E36; the principle model machine B turbine outlet 37 is directly communicated with the hot end inlet 38 of the heat regenerator B by a pipeline; thereby forming a closed gas loop.
The hoses in the pipelines are used for absorbing the thermal expansion of the pipelines and buffering vibration of the test piece during operation; the flow meter A23 and the flow meter B31 are used for measuring the flow entering the corresponding principle prototype; each detachable flange is used for realizing the switching between a single machine test and a double machine parallel test, and when the single machine test is performed, each detachable flange is detached, and then the blind plate blocks the pipeline where the detachable flange is located.
The double-machine parallel test bed is arranged in a factory building, a pit is built in the factory building, and guardrails are arranged around the pit; the heater 5 is arranged in the pit, the heater 5 is arranged on a heater supporting leg, and the heater supporting leg is connected to the ground through a bolt; two principle prototypes, two regenerators and a cooler 19 are arranged on the floor inside the plant. Wherein the cooler 19 is fixed to the ground by a cooler bracket, which is bolted to the ground. The two principle prototypes and the two regenerators are fixed on the ground by a bracket respectively, the bracket base is provided with a roller, and limited movement of the bracket base is allowed. The aeration unit and the cooling water unit are mostly arranged in the pit. The cooler gas working medium inlet pipeline, the cooler gas working medium outlet pipeline and the heater air inlet pipeline are all supported on the ground through brackets and are fixedly connected through anchor bolts.
The test method of the double-machine parallel test bed comprises the following steps:
1) The cooling water unit is turned on to supply cooling water to the cooler 19.
2) The vacuum pump 4 was turned on, the pipeline of the whole test stand was evacuated to 200Pa, and then the vacuum pump 4 was turned off.
3) The inflation unit is started, nitrogen is filled into the pipeline of the test bed through the inflation pressure regulating valve 3 to serve as a test working medium, and after the initial pressure in the pipeline reaches 0.12MPa, the inflation is stopped, and the inflation pressure regulating valve 3 is closed.
4) The high-speed motors of the two principle prototypes are powered, the principle prototypes are set with the rotating speed of 20000rpm, and after the low-speed operation is kept for 1min, the rotating speeds are raised to 50000rpm.
5) And (3) supplying power to the heater 5, starting the heater 5 in a grading manner, dynamically adjusting the power of the heater 5, observing whether the turbine inlet temperature of the two principle prototypes reaches a set first test target value (500 ℃), and if not, increasing the power of the heater 5 until the turbine inlet temperature of the two principle prototypes reaches the set first test target value (500 ℃).
6) After the inlet temperature of the turbine of the two principle prototypes reaches a set first test target value (500 ℃), starting a formal test, adjusting the rotation speed of the principle prototypes to enable the rotation speed of the principle prototypes to rise in a step manner, increasing 5000rpm or 10000rpm each time, and keeping the rotation speed for 3min after each adjustment until the rotation speed reaches the limit rotation speed of the engine;
and then the rotation speed of the principle model machine is adjusted in a step-down mode, the rotation speed is reduced by 10000rpm each time, and the rotation speed is kept for 3min after each adjustment until the rotation speed of the engine reaches 50000rpm.
7) And (3) repeating the step 5) and the step 6) according to a new target value (600 ℃, 700 ℃ and 800 ℃) in sequence to complete the test.
8) The heater 5 was powered off, the rotational speed of both principal prototypes was adjusted to 70000rpm, the turbine inlet was observed, and as the temperature was reduced, the rotational speed was adjusted to 50000rpm until the turbine inlet temperature reached 100 ℃.
9) The two principle prototypes are powered off and stop working.
10 The cooling water unit is turned off, and the test is ended.
At the beginning of the test, the whole test bed is in a normal temperature state, and the high-speed motor of the principle model machine drives the gas compressor to rotate, so that the gas in the pipeline of the whole test bed is driven to flow. The gas is compressed in the gas compressor through the gas compressor inlet of the principle model machine, the pressure and the temperature of the gas are both raised, then the high-pressure gas enters the cold end of the heat regenerator through the cold end inlet of the heat regenerator to absorb part of heat, and then enters the heater 5 through the heater air inlet 45 to be heated after being converged from the cold end outlet of the heat regenerator; then the gas enters the turbine through the turbine inlet of the principle model machine through the branch through the heater exhaust port 6 to push the turbine to do work, the air flow expands, the pressure becomes lower, the temperature also decreases, then the gas enters the regenerator through the pipeline connected with the hot end inlet of the regenerator through the turbine outlet of the principle model machine to release heat, finally the gas working medium flows out from the hot end outlet of the regenerator, flows into the gas working medium inlet pipeline of the cooler to enter the gas working medium inlet of the cooler to be cooled, then the working medium becomes normal temperature and normal pressure gas, flows out from the gas working medium outlet 20 of the cooler, flows into the inlet of the air compressor through the branch respectively, enters the air compressor to carry out the next cycle, and the gas forms uninterrupted flow of the air flow loop in the pipeline.
The heater 5 is then activated to heat, and the temperature of the air stream at the heater exhaust 6 and at the turbine inlet of the principal prototype is slowly increased, with a consequent slow increase in the pressure in the pipeline. The heat regenerator also gradually has temperature, at the moment, the test piece is driven by the high-speed motor to rotate the air compressor all the time, the work generated by the turbine cannot meet the work required by the air compressor, the work is consumed all the time, and the power output parameter of the engine is displayed as a negative number. As the heater is continuously heated, the temperature of the turbine inlet is also increased, the negative power value of the engine is continuously reduced, when the turbine inlet reaches a certain critical temperature, the function generated by the turbine counteracts the consumed work of the compressor and the high-speed motor, the engine power output parameter starts to be displayed as a positive number, the power is converted from the consumed work to the output work, and the power generation of the engine can be realized after the temperature is higher than the critical temperature.
In the formal test stage, gas forms uninterrupted flow of an airflow loop in a pipeline to generate electricity, the principle of electricity generation of a principle model machine is that the gas enters a compressor (compression pressurization), the compressed gas enters a cold end of a regenerator to absorb part of heat, then enters a heater to be heated to high temperature, the high-temperature gas enters a turbine to push the turbine to do work (expansion depressurization), then a working medium enters a hot end of the regenerator (heat exchange), the rest heat is partially recovered by the hot end of the regenerator to become normal-pressure gas with a certain temperature, finally the gas enters a cooler to exchange heat to reduce the temperature to normal temperature (release heat to the environment), and the normal-temperature and normal-pressure gas enters the compressor to be circulated again. Because the time from the temperature rise of the heater to the power generation stage is 2 to 3 hours, the time from one stage to the execution of the next stage is long, and no requirement is made on the time sequence, the flow of the test bed is a password, and the manual operation is performed on the control interface every time the test is carried out to the next stage.
Test data show that at the inlet temperature of the turbine of 800 ℃ and the maximum rotating speed, the maximum power generation power of a single principle model machine reaches 25kW, and the power generation powers of the two principle model machines are not greatly different. The maximum power of the two principle prototypes reaches 50kW.
Example 2:
on the basis of embodiment 1 described above, this embodiment further defines an inflator unit.
The air source in the air charging unit is connected with the air charging pressure regulating valve 3 arranged on the heater 5 through pipelines which are sequentially provided with a manual stop valve 56, a filter 55, an electric stop valve 54, a primary pressure reducing valve 53, a primary safety valve 52, an electric stop valve 50, a secondary pressure reducing valve 49, a secondary safety valve 48 and an electromagnetic valve B2; two branches are led out between the primary safety valve 52 and the electric stop valve 50, one branch is a discharge port provided with a deflation electromagnetic valve, and the other branch is provided with an electromagnetic valve A1 for providing driving gas for the high-temperature ball valve 46.
Wherein the manual stop valve 56 is positioned at the forefront end of the inflation unit pipeline, and is used for thoroughly cutting off the air source when the electric valve of the inflation unit pipeline is overhauled. And the device is manually opened before each test, and is finally closed after the test is finished.
The filter 55 is located behind the manual valve stop valve 56 and is used for filtering air source impurities and ensuring the cleanliness of air flow.
The electric stop valve 54 is positioned behind the filter 55 and is used for thoroughly closing and opening the pipeline; the test is started first before each test, and is closed finally after the test is finished. Is responsible for the safety of the pipeline.
The first-stage pressure reducing valve 53 is positioned behind the electric stop valve 54 and is used for adjusting and stabilizing the air inlet pressure of the pipeline; the pressure behind the valve was manually adjusted to the desired pressure before each test, and the pressure behind the valve was maintained during the test.
The primary relief valve 52 is positioned behind the primary relief valve 53 and is matched with the primary relief valve 53 at the front end, so that the safety of subsequent pipelines and equipment is ensured under the condition that the pressure of the primary relief valve 53 is over-regulated or fails.
The driving gas electromagnetic valve 1 for the high-temperature ball valve is positioned behind the first-stage safety valve 52, a pipeline is led out by a four-way joint to install the driving gas electromagnetic valve (namely the electromagnetic valve A1) for the high-temperature ball valve, and then the driving gas electromagnetic valve is communicated with a process gas port of the high-temperature ball valve to be used as a switching valve of driving gas flow of the high-temperature ball valve.
The air release solenoid valve 51 is positioned behind the primary safety valve 52, and the air release solenoid valve 51 is installed by leading a pipeline out through a four-way joint, and then the air is introduced for pressure release of the tested pipeline. Closing before the test, opening after the test is finished, and closing after the air is discharged.
The electric stop valve 50 is positioned behind the primary safety valve 52, and is led out from the rest of the four-way pipeline, and the electric stop valve 50 is installed for thoroughly closing and opening the charging pipeline of the heater. The test is started first before each test, and is closed finally after the test is finished.
The secondary pressure reducing valve 49 is located behind the electric stop valve 50 and is used for further regulating and stabilizing the inlet pressure of the pipeline; the pressure behind the valve was manually adjusted to the desired pressure before each test, and the pressure behind the valve was maintained during the test.
The secondary relief valve 48 is located behind the secondary relief valve 49 and is matched with the secondary relief valve 49 at the front end, and the safety of subsequent pipelines and equipment is guaranteed under the condition that the pressure of the secondary relief valve 49 is over-regulated or fails.
The solenoid valve 2 is located behind the secondary relief valve 48 and serves as an intake switch for the charge line. The valve is opened when ventilation is needed in the test process, and closed when ventilation is not needed.
The inflation pressure regulating valve 3 is arranged behind the electromagnetic valve B2 and is arranged on the heater 5, the opening of the inflation pressure regulating valve 3 is adjustable and is used for pre-charging working media for a test loop of a test bed, and the flow rate entering the heater can be controlled. The test circuit was inflated before testing and closed after filling.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (9)
1. Double-machine parallel test bed of closed brayton cycle power generation system, its characterized in that: the method is used for realizing the brayton cycle power generation double-machine joint debugging; comprising the following steps: two principle prototypes, two regenerators, a heater (5) and a cooler (19); the peripheral device includes: an air charging unit and a cooling water unit;
two principle prototypes are arranged in parallel, and each principle prototype is correspondingly provided with a heat regenerator; let two principle prototypes be a principle prototype a (25) and a principle prototype B (34) respectively; the two regenerators are a regenerator A (12) and a regenerator B (40) respectively;
the heater (5) is used for providing the same pressure and temperature test conditions for the two principle prototypes; the air charging unit is communicated with the heater (5) through a pipeline and is used for providing a gas working medium for the test bed;
during the test, the heater (5) is started in a grading way, and the power of the heater (5) is regulated until the turbine inlet temperature of the two principle prototypes reaches a set first test target value;
the cooler (19) is used for reducing the temperature of the gas working medium discharged by the two principle prototypes to a set value, and cooling water in the cooler (19) is provided by a cooling water unit;
the heater exhaust port (6) is respectively communicated with the principle prototype A turbine inlet (22) and the principle prototype B turbine inlet (29) through two branch pipelines; the air inlet (45) of the heater is communicated with the cold end outlet (8) of the heat regenerator A and the cold end outlet (42) of the heat regenerator B through two branch pipelines;
the cooler gas working medium inlet (16) is respectively communicated with the hot end outlet (10) of the heat regenerator A and the hot end outlet (41) of the heat regenerator B through two branch pipelines; the cooler gas working medium outlet (20) is respectively communicated with the principle prototype A compressor inlet (26) and the principle prototype B compressor inlet (33) through two branch pipelines;
the principle model machine A turbine outlet (15) is communicated with the hot end inlet (14) of the heat regenerator A through a pipeline, and the principle model machine A compressor outlet (24) is communicated with the cold end inlet of the heat regenerator A through a pipeline;
the turbine outlet (37) of the principle prototype B is communicated with the hot end inlet (38) of the heat regenerator B through a pipeline, and the compressor outlet (35) of the principle prototype B is communicated with the cold end inlet (39) of the heat regenerator B through a pipeline;
the vacuum pump (4) is communicated with an air flow channel inside the heater (5) through a vacuum pipeline;
the air source in the air charging unit is communicated with the heater (5) through a pipeline which is sequentially provided with a manual stop valve (56), an electric stop valve I (54), a primary pressure reducing valve (53), a primary safety valve (52), an electric stop valve II (50), a secondary pressure reducing valve (49), a secondary safety valve (48) and a solenoid valve B (2); the primary pressure reducing valve (53) is used for adjusting and stabilizing the inlet pressure of the pipeline; the primary safety valve (52) is used for guaranteeing the safety of subsequent pipelines and equipment under the condition that the pressure of the primary pressure reducing valve (53) is over-regulated or fails; the air release electromagnetic valve (51) is positioned behind the primary safety valve (52), the air release electromagnetic valve (51) is installed by leading a pipeline out through a four-way joint, and then the air is introduced for pressure release of the tested pipeline; the secondary pressure reducing valve (49) is used for further regulating and stabilizing the inlet pressure of the pipeline; the secondary relief valve (48) is used for guaranteeing the safety of subsequent pipelines and equipment under the condition that the pressure of the secondary relief valve (49) is over-regulated or fails.
2. The closed brayton cycle power generation system double-machine parallel test stand of claim 1, wherein:
a detachable flange B (28) is arranged on a branch pipeline of the heater exhaust port (6) communicated with the turbine inlet (29) of the principle prototype B;
a detachable flange D (47) is arranged on a branch pipeline which is communicated with the cold end outlet (42) of the heat regenerator B through a heater air inlet (45);
a detachable flange A (9) is arranged on a branch pipeline which is communicated with a gas working medium inlet (16) of the cooler and a hot end outlet (41) of the heat regenerator B;
a detachable flange C (30) is arranged on a branch pipeline of the cooler, wherein the gas working medium outlet (20) is communicated with the gas inlet (33) of the principle model machine B.
3. The closed brayton cycle power generation system double-machine parallel test stand of claim 1 or 2, wherein: the air inlet (45) of the heater is communicated with the cold end outlet (8) of the heat regenerator A, the air working medium inlet (16) of the cooler is communicated with the hot end outlet (11) of the heat regenerator A and the hot end outlet (41) of the heat regenerator B, the air working medium outlet (20) of the cooler is communicated with the air inlet (26) of the principle sample machine A and the air inlet (33) of the principle sample machine B, the air outlet (24) of the principle sample machine A is communicated with the cold end inlet (13) of the heat regenerator A, and the air outlet (35) of the principle sample machine B is communicated with the cold end inlet (39) of the heat regenerator B.
4. The closed brayton cycle power generation system double-machine parallel test stand of claim 1 or 2, wherein: the air charging unit is connected with an air charging pressure regulating valve (3) on the heater (5), and the air charging pressure regulating valve (3) is used for pre-charging working medium to set initial pressure for the test bed after the test bed is vacuumized.
5. The closed brayton cycle power generation system double-machine parallel test stand of claim 1 or 2, wherein: a high Wen Qieduan valve (46) is provided in the line connected to the heater inlet (45).
6. The closed brayton cycle power generation system double-machine parallel test stand of claim 5, wherein: the high temperature shut-off valve (46) is supplied with process gas by the gas charging unit.
7. The closed brayton cycle power generation system double-machine parallel test stand of claim 1, wherein: the aeration unit further comprises a filter (55), wherein the filter (55) is positioned behind the manual stop valve (56) and is used for filtering air source impurities.
8. The closed brayton cycle power generation system double-machine parallel test stand of claim 1 or 2, wherein: the heater (5) is an electromagnetic induction graphite heat accumulating type heater.
9. The closed brayton cycle power generation system double-machine parallel test stand of claim 1 or 2, wherein: the cooler (19) adopts a single-stage shell-and-tube heat exchanger, a cooling water tube pass and a gas working medium tube pass; the cooling water provided by the cooling water unit enters the cooler (19) from the cooler cooling water inlet (18); after the heat exchange of the cooling water in the cooler (19) is finished, the cooling water flows out of a cooling water outlet (17) of the cooler, and the cooling water outlet (17) of the cooler is communicated with a water return pipeline of the cooling water unit through a pipeline.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9562471B1 (en) * | 2013-05-01 | 2017-02-07 | Sandia Corporation | Method for controlling start-up and steady state performance of a closed split flow recompression brayton cycle |
| CN108279127A (en) * | 2018-01-22 | 2018-07-13 | 哈尔滨工程大学 | A kind of compressor is comprehensive performance test bed |
| CN109752611A (en) * | 2018-12-25 | 2019-05-14 | 北京动力机械研究所 | A kind of Closed Brayton Power Cycle simulation of power generating system testing stand |
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| US20040131138A1 (en) * | 2001-05-25 | 2004-07-08 | Michael Correia | Brayton cycle nuclear power plant and a method of starting the brayton cycle |
| US20160281604A1 (en) * | 2015-03-27 | 2016-09-29 | General Electric Company | Turbine engine with integrated heat recovery and cooling cycle system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9562471B1 (en) * | 2013-05-01 | 2017-02-07 | Sandia Corporation | Method for controlling start-up and steady state performance of a closed split flow recompression brayton cycle |
| CN108279127A (en) * | 2018-01-22 | 2018-07-13 | 哈尔滨工程大学 | A kind of compressor is comprehensive performance test bed |
| CN109752611A (en) * | 2018-12-25 | 2019-05-14 | 北京动力机械研究所 | A kind of Closed Brayton Power Cycle simulation of power generating system testing stand |
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