CN107218510A - Space environment simulation facility is vented optimization system and the Space environment simulation facility with the system - Google Patents
Space environment simulation facility is vented optimization system and the Space environment simulation facility with the system Download PDFInfo
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- CN107218510A CN107218510A CN201710462776.9A CN201710462776A CN107218510A CN 107218510 A CN107218510 A CN 107218510A CN 201710462776 A CN201710462776 A CN 201710462776A CN 107218510 A CN107218510 A CN 107218510A
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- temperature
- space environment
- environment simulation
- simulation facility
- nitrogen
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/005—Pipe-line systems for a two-phase gas-liquid flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Optimization system is vented the invention discloses a kind of Space environment simulation facility, including rise again heat exchanger and the electric heater for being connected on Space environment simulation facility blowdown piping, temperature measuring equipment and controller, in Space environment simulation facility heat exchanger of rising again is first passed through using the liquid nitrogen and low temperature nitrogen of middle discharge, exchanged heat when passing through with ambient atmosphere environment, temperature is increased to close to normal temperature, nitrogen close to normal temperature is further heated up by electric heater heating, temperature measuring equipment is measured to nitrogen leak temperature, the temperature value that controller is measured according to temperature measuring equipment controls the power output of electric heater, nitrogen leak temperature is set to be higher than the dew-point temperature of environment, it is discharged into again in atmospheric environment.The Space environment simulation facility cryogenic system of present invention emptying optimization system is employed, it is small to surrounding environment influence, more field conditions are can adapt to, the competitiveness of product is improved, so as to eliminate emptying fog, it is to avoid most surrounding people and vehicle are impacted.
Description
Technical field
The invention belongs to spacecraft thermal vacuum test technical field, specifically, set the present invention relates to a kind of space environment
Standby emptying optimization system.
Background technology
Currently, the cold darkness environment of vacuum that space simulator is used in simulation space, low temperature ring is simulated by liquid nitrogen
In system precooling stage, normal work stage and risen again the stage in border, space simulator process of the test of the prior art
Liquid nitrogen, low temperature nitrogen can be discharged to surrounding environment.
As shown in figure 1, the Space environment simulation facility of prior art, the cryogenic system 1 having is in the precooling stage, and liquid nitrogen passes through liquid
Nitrogen pipeline is cooled down to liquid nitrogen pump 13, Space environment simulation facility 11 and subcooler 12, residual liquid nitrogen and low temperature nitrogen after cooling
By the row of precooling exhausting pipeline 14 to atmospheric environment.
Space environment simulation facility cryogenic system 1 is in stationary operational phase, and liquid nitrogen is in liquid nitrogen pump 13, Space environment simulation facility 11 and mistake
Single-phase sealing and circulating between cooler 12, has no liquid nitrogen discharge.But in order to which the high temperature liquid nitrogen temperature in single-phase sealing and circulating is reduced,
Constantly there is liquid nitrogen vaporization in the cavity of subcooler 12, the low temperature nitrogen after vaporization is by the row of subcooler exhausting pipeline 15 to big compression ring
Border.
Risen again the stage in shutdown, liquid nitrogen pump 13 is stopped, it is necessary to which the liquid nitrogen in Space environment simulation facility cryogenic system 1 is led to
Cross the removal system of precooling exhausting pipeline 14.Initial stage can discharge substantial amounts of liquid nitrogen and low temperature nitrogen.
However, existing Space environment simulation facility emptying can produce substantial amounts of liquid nitrogen and low temperature nitrogen, when the mixture is discharged,
Water vapor condensation mist formation in environment, influences all-round visibility, very big inconvenience is brought to the personnel of surrounding and vehicle, in rainy weather
When it is even more serious.Particularly in some projects, emptying region has a strong impact on traffic or safety close to garage and highway, therefore,
In the urgent need to it is a kind of can be efficient, safe and environment-friendly handle above-mentioned emptying mixture emptying optimize system, with meet user will
Ask, improve product competitiveness.
The content of the invention
In view of the above-mentioned problems, it is an object of the invention to provide a kind of improved Space environment simulation facility emptying optimization system,
Low temperature liquid nitrogen/nitrogen that Space environment simulation facility can be vented by emptying optimization system is risen again in advance, becomes temperature close to normal temperature
Nitrogen, then arrange to surrounding environment, influenceed with the fog that emptying is mitigated or eliminated.
The Space environment simulation facility emptying optimization system of the present invention, including for being connected to Space environment simulation facility blowdown piping
Rise again heat exchanger and electric heater, temperature measuring equipment and controller, the liquid nitrogen and low temperature discharged in Space environment simulation facility use
Nitrogen first passes through heat exchanger of rising again, and is exchanged heat when passing through with ambient atmosphere environment, and temperature is increased to close to normal temperature, close to normal temperature
Nitrogen by electric heater heating further heat up, temperature measuring equipment is measured to nitrogen leak temperature, and controller is according to survey
The temperature value of warm measurement device controls the power output of electric heater, nitrogen leak temperature is higher than the dew-point temperature of environment, then
It is discharged into atmospheric environment.
Wherein, rise again heat exchange for the form such as air temperature type vaporizer or water-bath type heat exchanger heat exchanger.
Wherein, delivery temperature is controlled by the power output of electric heater.
Wherein, the liquid nitrogen and low temperature nitrogen of discharge after heat exchanger of rising again temperature be higher than ambient dew point temperature, close
Electric heater.
Wherein, rise again heat exchanger flow resistance no more than 0.01MPa.
Wherein, above-mentioned temperature measuring equipment can be contact type temperature sensor or non-contact temperature sensor.
Optimize the Space environment simulation facility of system, including Space environment simulation facility, subcooler, liquid nitrogen pump, liquid with above-mentioned emptying
Nitrogen storage supply system and corresponding pipeline valve, it is characterised in that be provided with Space environment simulation facility blowdown piping above-mentioned
It is vented optimization system.
Compared with prior art, emptying of the invention optimizes system by heat exchanger and the electric heater 22 of rising again, by space
System precooling stage, the liquid nitrogen of normal work stage, low temperature nitrogen are in the ring around in the process of the test of environment simulation facility cryogenic system 1
Risen again before the discharge of border, prevent emptying from producing fog, it is to avoid to be impacted to surrounding people and vehicle.The present invention can also
By adjusting the power output of electric heater 22, the effect of emptying is controlled.Employ the spatial loop of present invention emptying optimization system 2
Mould equipment cryogenic system 1, it is small to surrounding environment influence, more field conditions are can adapt to, the competitiveness of product is improved, from
And eliminate emptying fog, it is to avoid surrounding people and vehicle are impacted.Particularly in weather (such as cloudy day, rain, the snow of high humidity
Weather), the fog that directly emptying is produced is more serious compared to fine day, and in the factory building that some spaces are nervous, emptying region is closed on
Road, even close to garage exit/entry, fog influence personnel and the sight of vehicle that emptying is produced, using present invention emptying optimization system
Personnel's vehicle safety can be effectively ensured in the Space environment simulation facility cryogenic system of system.
Brief description of the drawings
Fig. 1 is Space environment simulation facility cryogenic system structural representation of the prior art.
Wherein, 1 is Space environment simulation facility cryogenic system；11 be Space environment simulation facility；12 be subcooler；13 be liquid nitrogen pump；
14 precooling exhausting pipelines；15 subcooler exhausting pipelines.
Fig. 2 is the Space environment simulation facility cryogenic system structural representation with emptying optimization system after the improvement of the present invention
Figure.
Wherein, 1 is Space environment simulation facility cryogenic system；2 be emptying optimization system；21 be air temperature type vaporizer；22 be electricity
Heater.
Fig. 3 is used for the structural representation for being vented optimization system of space environment equipment for the present invention's.
Wherein, 2 be emptying optimization system；21 be air temperature type vaporizer；22 be electric heater.
Fig. 4 be Space environment simulation facility cryogenic system structure in subcooler structural representation.
Wherein, 121 be subcooler cavity；122 subcooler heat exchangers；123 be subcooler liquid supplementation channel.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail, these embodiments be only it is schematical, not
It is intended to carry out any limitation to protection scope of the present invention.
Referring to Fig. 2 and Fig. 3, Fig. 2 is the Space environment simulation facility cryogenic system 1 for employing the emptying optimization system 2 of the present invention
Structural representation, Fig. 3 for the emptying optimization system 2 of the present invention partial enlargement structural representation.Wherein, existing spatial loop
Mould equipment cryogenic system 1 is internally provided with Space environment simulation facility 11, subcooler 12 and liquid nitrogen pump 13, the precooling in process of the test
Stage and stable operation stage can all have liquid nitrogen, low temperature nitrogen discharge.Wherein, emptying optimization system 2, which is internally provided with to rise again, changes
Hot device 21 and electric heater 22 and temperature sensor and controller, liquid nitrogen and low temperature nitrogen by during antiaircraft optimization system 2 with
Ambient atmosphere environment is exchanged heat, and temperature is increased to close to normal temperature, and the nitrogen close to normal temperature is further by electric heater heating
Heating, temperature measuring equipment is measured to nitrogen leak temperature, and the temperature value that controller is measured according to temperature measuring equipment controls electrical heating
The power output of device, makes nitrogen leak temperature be higher than the dew-point temperature of environment, then be discharged into atmospheric environment.
Specifically, the experiment of Space environment simulation facility cryogenic system 1 is divided into precooling stage, stable operation stage and shutdown and risen again
Stage.Liquid nitrogen and low temperature nitrogen needs can all be had at initial stage in stage by wherein being risen again in precooling stage, stable operation stage and shutdown
Emptying.In the precooling stage of Space environment simulation facility cryogenic system 1, precooling front space environment simulation facility 11, subcooler 12, liquid nitrogen pump 13
And corresponding pipeline valve is all normal temperature, precooling starts rear liquid nitrogen and is passed through Space environment simulation facility cryogenic system 1, successively coolant
Nitrogen pump 13, Space environment simulation facility 11, subcooler 12 and corresponding pipeline, with the cooling of equipment and pipeline, liquid nitrogen is not cut steam
Change, the nitrogen of vaporization passes through the discharge system of precooling exhausting pipeline 14.Discharge at precooling initial stage nitrogen close to normal temperature, with system
Continuous cooling, the nitrogen temperature of discharge is gradually reduced, to the later stage in precooling stage, and system is cooled down completely full of liquid nitrogen, now
Discharge for liquid nitrogen, nitrogen two-phase mixtures.The liquid nitrogen in precooling stage/gas nitrogen row to before environment by being vented optimization system 2,
By rising again, heat exchanger 21 is risen again in advance, then the start and stop by electric heater 22 and output power delivery temperature, is subtracted
Influence light or that elimination emptying water smoke is to surrounding people and vehicle.Crossing conference causes the pressure in the cavity of subcooler 12 to become big, from
And the corresponding saturation pressure of liquid nitrogen is also raised in the cavity of subcooler 12, the system temperature of Space environment simulation facility cryogenic system 1 is caused
Rise, influences the performance indications of system.
In addition, in the stable operation stage of Space environment simulation facility cryogenic system 1, precooling front space environment simulation facility 11, supercooling
Liquid nitrogen is filled with device 12, liquid nitrogen pump 13 and corresponding pipeline, precooling exhausting pipeline 14 is closed, and starts liquid nitrogen pump 13, liquid nitrogen
The single-phase sealing and circulating in Space environment simulation facility cryogenic system 1.By the liquid nitrogen absorption test thermic load of Space environment simulation facility 11
Temperature is raised afterwards, and temperature is reduced when high temperature liquid nitrogen passes through subcooler 12, and low temperature liquid nitrogen is delivered to space environment and set by liquid nitrogen pump 13
There is provided the power that liquid nitrogen is circulated in Space environment simulation facility cryogenic system 1 in standby 11.The stabilization of Space environment simulation facility cryogenic system 1
During operation, the subcooler exhausting pipeline 15 of subcooler 12 is normally opened, and the low temperature nitrogen in subcooler cavity 121 after the vaporization of liquid nitrogen leads to
Cross subcooler exhausting pipeline 15 to discharge, it is ensured that the liquid nitrogen temperature of subcooler cavity 121 is maintained close to full under an atmospheric pressure
And temperature.The low temperature nitrogen that stable operation stage subcooler 12 is discharged, by being vented optimization system 2, passes through before arranging to environment
Heat exchanger 21 of rising again is risen again in advance, then the start and stop by electric heater 22 and output power delivery temperature, mitigate or
Eliminate influence of the emptying water smoke to surrounding people and vehicle.
For being vented the flow resistance of optimization system 2, it is impossible to more than 0.01MPa.As shown in figure 4, subcooler 12 is by being subcooled
Device cavity 121, subcooler heat exchanger 122 and liquid supplementation channel 123 are constituted, the liquid nitrogen circulated in Space environment simulation facility cryogenic system 1
Exchanged heat by subcooler heat exchanger 122 with subcooler cavity 121, the reduction of high temperature liquid nitrogen temperature is continued low in Space environment simulation facility
Circulated in warm system 1.Subcooler cavity 121 is connected by subcooler exhausting pipeline 15 with external environment, makes subcooler cavity 121
In pressure close to an atmospheric pressure, so as to ensure liquid nitrogen temperature position in subcooler cavity 121 close to an atmospheric pressure
Under saturation temperature.The constantly consumption of liquid nitrogen in subcooler cavity 121, it is necessary to carry out fluid infusion by subcooler liquid supplementation channel 123,
Ensure that the liquid nitrogen in subcooler cavity 121 maintains certain liquid level.Subcooler exhausting pipeline 15 is excellent by being vented in the present invention
Change system 2 is communicated with environment, it is desirable to which the flow resistance for being vented optimization system 2 can not be excessive, otherwise the pressure mistake in subcooler cavity 121
Height, will result in the liquid nitrogen temperature rise in subcooler cavity 121, the temperature index of influence Space environment simulation facility cryogenic system 1.
Risen again the stage in shutdown, liquid nitrogen pump 13 is stopped, it is necessary to which the liquid nitrogen in Space environment simulation facility cryogenic system 1 is led to
Cross the removal system of precooling exhausting pipeline 14.Substantial amounts of liquid nitrogen and low temperature nitrogen, the liquid nitrogen and low temperature nitrogen of discharge can be discharged initial stage
By being vented optimization system 2 before arranging to environment, by rising again, heat exchanger 21 is risen again in advance, then passes through electric heater 22
Start and stop and output power delivery temperature, influence of the emptying water smoke to surrounding people and vehicle is mitigated or eliminated.
Although the embodiment to the present invention gives detailed description and illustrated above, it should be noted that
We can carry out various equivalent changes and modification according to the conception of the present invention to above-mentioned embodiment, and the function produced by it is made
, all should be within protection scope of the present invention during with the spirit still covered without departing from specification and accompanying drawing.
Claims (7)
1. Space environment simulation facility is vented optimization system, including the heat exchange of rising again for being connected on Space environment simulation facility blowdown piping
Device and electric heater, temperature measuring equipment and controller, wherein, the liquid nitrogen and low temperature nitrogen discharged in Space environment simulation facility use is first
By heat exchanger of rising again, exchanged heat when passing through with ambient atmosphere environment, temperature is increased to close to normal temperature, close to the nitrogen of normal temperature
Further heated up by electric heater heating, temperature measuring equipment is measured to nitrogen leak temperature, and controller is according to temperature measuring equipment
The temperature value of measurement controls the power output of electric heater, nitrogen leak temperature is higher than the dew-point temperature of environment, then be discharged into
In atmospheric environment.
2. Space environment simulation facility as claimed in claim 1 is vented optimization system, wherein, heat exchange of rising again for air temperature type vaporizer or
The heat exchanger of the forms such as person's water-bath type heat exchanger.
3. Space environment simulation facility as claimed in claim 1 is vented optimization system, wherein, delivery temperature by electric heater output
Power is controlled.
4. Space environment simulation facility as claimed in claim 1 is vented optimization system, wherein, the liquid nitrogen and low temperature nitrogen of discharge are in warp
Cross temperature after heat exchanger of rising again and be higher than ambient dew point temperature, close electric heater.
5. the Space environment simulation facility emptying optimization system as described in claim any one of 1-4, wherein, the flow resistance for heat exchanger of rising again
No more than 0.01MPa.
6. the Space environment simulation facility emptying optimization system as described in claim any one of 1-4, wherein, the temperature measuring equipment is to connect
Touch temperature sensor or non-contact temperature sensor.
7. the Space environment simulation facility with any one of the claim 1-6 emptying optimization systems, including Space environment simulation facility, mistake
Cooler, liquid nitrogen pump, liquid nitrogen storage supply system and corresponding pipeline valve, wherein, set on Space environment simulation facility blowdown piping
It is equipped with the emptying optimization system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710462776.9A CN107218510A (en) | 2017-06-19 | 2017-06-19 | Space environment simulation facility is vented optimization system and the Space environment simulation facility with the system |
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| CN201710462776.9A CN107218510A (en) | 2017-06-19 | 2017-06-19 | Space environment simulation facility is vented optimization system and the Space environment simulation facility with the system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108423201A (en) * | 2018-05-09 | 2018-08-21 | 北京瑞尔腾普科技有限公司 | A kind of liquid nitrogen continuous feeding device and liquefied ammonia environmental simulation system |
| CN108945535A (en) * | 2018-07-12 | 2018-12-07 | 上海卫星装备研究所 | A kind of Space environment simulation facility nitrogen cooling type chilled water unit |
| CN108981285A (en) * | 2018-06-19 | 2018-12-11 | 北京卫星环境工程研究所 | The nitrogen recycling liquefying plant of Space environment simulation facility cryogenic system |
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| CN103016951A (en) * | 2012-11-26 | 2013-04-03 | 上海裕达实业公司 | Residual liquid emptier |
| CN105644812A (en) * | 2016-02-25 | 2016-06-08 | 上海宇航系统工程研究所 | Environmental simulation method and system capable of achieving low dew point in large normal-pressure space |
| CN105737472A (en) * | 2016-02-25 | 2016-07-06 | 北京卫星环境工程研究所 | Multi-operating mode liquid-nitrogen refrigerating system for large-scale space environmental simulator |
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Patent Citations (6)
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|---|---|---|---|---|
| WO1999039138A1 (en) * | 1998-01-30 | 1999-08-05 | Daikin Industries, Ltd. | Refrigerating plant |
| CN102374708A (en) * | 2011-08-16 | 2012-03-14 | 北京航空航天大学 | Negative-pressure liquid nitrogen subcooler and method therefore for reducing liquid nitrogen temperature |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108423201A (en) * | 2018-05-09 | 2018-08-21 | 北京瑞尔腾普科技有限公司 | A kind of liquid nitrogen continuous feeding device and liquefied ammonia environmental simulation system |
| CN108981285A (en) * | 2018-06-19 | 2018-12-11 | 北京卫星环境工程研究所 | The nitrogen recycling liquefying plant of Space environment simulation facility cryogenic system |
| CN108945535A (en) * | 2018-07-12 | 2018-12-07 | 上海卫星装备研究所 | A kind of Space environment simulation facility nitrogen cooling type chilled water unit |
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Application publication date: 20170929 |
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