CN110296623A - A kind of engine testing room residual-heat utilization method - Google Patents
A kind of engine testing room residual-heat utilization method Download PDFInfo
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- CN110296623A CN110296623A CN201910638847.5A CN201910638847A CN110296623A CN 110296623 A CN110296623 A CN 110296623A CN 201910638847 A CN201910638847 A CN 201910638847A CN 110296623 A CN110296623 A CN 110296623A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/004—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for engine or machine cooling systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Testing Of Engines (AREA)
Abstract
The invention discloses a kind of engine testing room residual-heat utilization methods, belong to engine test technology.Lack residual-heat utilization method for the circulation of current laboratory, cannot be to heat recovery the problem of, the present invention utilizes existing laboratory's circulation, the method for devising a set of pair of heat recovery, heat recovery is realized by the control to hot water, cooling water, chilled water, the present invention no matter subjects generate waste heat number, system can self-control without influence test carry out.It is not in that low waste heat can not recycle；High waste heat will not occur to have little time to absorb, cause the too high test of temperature that can not be normally carried out, deviation occurs in measurement；The invalid energy or pollution power sources are not present in waste heat energy recycling and reusing process, and system is achieved the goal by physics heat exchange, and also without security risk, service life is longer, reliably.
Description
Technical field
The invention belongs to engine test technologies.
Background technique
In engine working process, engine will generate a large amount of heat, can be with by the recycling to waste heat
Energy consumption is reduced, the pollution to environment is reduced.Presently disclosed patent is mostly used for vehicle, and method therefor is summarized are as follows: is passed through
The heat of the systems such as tail gas is acquired, then converts electric energy for the energy of acquisition by other energy conversion systems by heat-exchange system
Or mechanical energy is stored or is directly used in other systems.
With the emission request that country is increasingly stringenter automobile engine, automobile engine enterprise also starts to engine
Laboratory proposes higher experimental condition demand.The experimental condition of traditional experiment room is generally more simple and crude, is unable to satisfy stringent
Experimental enviroment require and emission test condition, so improve laboratory test condition be particularly important with ability.Furthermore exist
It is able to respond that national policy is energy saving, increase operation rate and our important is examined while improving laboratory test ability
Amount.
Publication No. CN106246268A " a kind of engine residual heat integrative recovery system ", patent of invention.Pass through a kind of packet
Include condenser, single-screw expander, generator, motor exhaust lack of gas discharge pipe, evaporating heat exchanger, etc. more than the engine of compositions
Hot comprehensive recovery system, using the recycling of engine high-grade energy recovery system have high-grade can tail gas, treated tail gas
The engine cooling water of lack of gas and low-grade energy carries out exhaust gas heat collectively as heat source to drive lithium-bromide absorption-type refrigerating machine
The abundant recycling of amount.Program higher cost needs to lay long and complex pipeline, buys ancillary equipment；To multiple test bays
It not can guarantee service pressure, if but the excessive generation danger of the possible partial portion pressure of intensified pressure；Refrigeration machine long-term vacuum fortune
The easy gas leakage of row, to influence unit performance；Lithium bromide has powerful corrosion strength to steel pipeline, influences unit cooling capacity；Low temperature
Lower cryocooled water, which can generate crystallization, influences operation.
Publication No. CN107650622A " a kind of engine exhaust heat cyclic utilization system ", patent of invention.By utilizing hair
Enter the gas waste-heat in intercooler after waste heat and air inlet residual heat heat-exchanging device the recycling booster of motivation cooling water, for quick
Warming up and air-conditioning heating.Improve engine exhaust heat utilization rate.Heat of the program to equipment such as booster, exhaust aftertreatment devices
Amount, which absorbs, needs corresponding heat-exchange device, but test bay to cope with different model engine and after-treatment system without
Method meets all models with a set of heat-exchange device, too wastes time essence if making heat-exchange device to every kind of type design
Power and cost；System too complex, the energy loss and additional energy consumption recycled during pipeline control is more are more.
Publication No. CN109139289A " engine residual heat integrative utilizes system ", patent of invention.By utilizing engine
Body residual-heat utilization technology and the various ways such as exhaust tube remaining heat utilization technology and existing Stirling engine are integrated
It utilizes, new power source is formed, to reduce the consumption of fuel, to reach energy-efficient purpose.External combustion body used in the program
Product is larger, the higher costs such as used corollary equipment such as expanding chamber, discharge chambe, heating room, cooling chamber, regeneration room；Heat damage
Lose it is larger, in addition each systems technology is originally immature how many heat can be recycled there are queries；Stirling engine need of work
High temperature, waste heat recycling can may not provide so high temperature by heat exchange, thus can not make its work；If even if waste heat
Can achieve requirement, there is also because supply it is unstable caused by external-combustion engine power generation electric energy it is impure, may cause laboratory
The damage of system equipment.
The problem of three above patent application exists jointly is first is that improvement cost is excessive；Second is that all passing through more than recycling tail gas
Heat, but waste heat from tail gas is absorbed, and temperature reduces the measurement that certainly will influence exhaust emissions value, we require UTILIZATION OF VESIDUAL HEAT IN that cannot influence
The normal operation of engine test.
Summary of the invention
The circulation of existing test bay is mostly used through cooling tower wind-cooling heat dissipating, and each test bay, each system it
Between independently without connection, and the collecting and distributing control model for the entire test chamber system established through the invention utilizes unified control system
Capacity usage ratio and control precision are improved, while not influencing the independent running of each test bay again.
Engine exhaust heat recycling system at present, substantially for being loaded into what engine on vehicle designed, for hair
The UTILIZATION OF VESIDUAL HEAT IN of motivation laboratory can not be used because cost is high, or because influencing the reasons such as measuring condition.
A kind of engine testing room residual-heat utilization method provided by the present invention, comprises the steps of:
One, operating mode judges:
1) judged according to water temperature state,
2) after hot water water temperature reaches requirement, enter hot-water mode if boiler is opened, be if boiler does not open judgement
No continuation hot-water mode, if then entering hot-water mode；If it is not, then come back to step 1) whether reached according to water temperature require into
Row judgement；
3) when hot water water temperature not up to requires, into cold water mode if boiler is not opened；If boiler open if judgement be
No continuation cold water mode, if then entering cold water mode；If it is not, then come back to step 1) whether reached according to water temperature require into
Row judgement.
The temperature requirement of cold water mode and hot-water mode is set according to boiler test room required temperature.
Two, rate-determining steps are specific as follows under hot-water mode:
1) judge the difference between heat exchange temperature setting value and temperature actual value,
If 2) actual value < setting value, closing freezing water valve and cooling water valve are controlled, PID control is opened by hot water valve
Valve opening is heated to recirculated water；
If 3) actual value > setting value, if hot water valve aperture > 0% at this time, first closes hot water valve, if hot water valve aperture
Cooling water valve is opened when=0%, and cooling water valve aperture is adjusted to circulating water cooling to actual value=setting value by PID；
4) when cooling water valve aperture reaches 100%, however it remains when actual value > setting value, it is permanent to adjust cooling water valve aperture
Fixed while to open freezing water valve to 80%, adjusting chilled water valve opening by PID reduces circulating water temperature to actual value=set
Set value.
Two, rate-determining steps are specific as follows under cold water mode:
1) judge the difference between the temperature actual value of heat exchange and setting value,
If 2) actual value≤setting value, closes hot water valve, cooling water valve and freezing water valve and water temperature is waited to rise；
If 3) actual value > setting value, and hot water valve aperture is not up to 100%, by PID control hot water valve aperture, adjusts
Water temperature；
4) when hot water valve aperture has reached 100%, however it remains when actual value > setting value, adjust hot water valve aperture and arrive
80%, cooling water valve is opened, and adjusting cooling water valve aperture by PID reduces circulating water temperature；
5) when cooling water valve aperture has reached 100%, however it remains when actual value > setting value, adjust cooling water valve aperture
To 80%, freezing water valve is opened, and adjusting chilled water valve opening by PID reduces circulating water temperature.
The invention has the advantages that:
(1) present invention is suitable for engine testing room heat recovery, energy saving to achieve the effect that；
(2) present invention can be transformed that (can all there be water cooling system in laboratory, can be subject to using laboratory's existing equipment
Using), cost used is less.The circulation of a test bay need to be only added when later period needs to increase laboratory, no
With additional addition equipment.
(3) present invention will not occur being applicable in because of test engine difference, or even be suitable for other using similar water
The laboratory of the circulatory system, versatility are good；
(4) present invention no matter subjects generate waste heat number, system can self-control without influence test into
Row.It is not in that low waste heat can not recycle；High waste heat will not occur to have little time to absorb, cause the too high test of temperature can not
It is normally carried out, deviation occurs in measurement；
(5) the invalid energy or pollution power sources are not present in waste heat energy recycling and reusing process, and system is reached by physics heat exchange
To purpose, also without security risk, service life is longer, reliably.
Detailed description of the invention
Fig. 1 is hot-water heating system schematic diagram
Fig. 2 is test bay circulation schematic diagram
Fig. 3 is fresh air system schematic diagram
Fig. 4 mode decision flow chart
Fig. 5 hot-water mode flow chart
Fig. 6 cold water model process figure
Fig. 7 UTILIZATION OF VESIDUAL HEAT IN schematic diagram.
Specific embodiment
Laboratory's public water utilities pipeline is made of hot water, cooling water, chilled water etc..Here using hot water line as representative,
As shown in Figure 1, hot water reaches Constant pressure tank by water pump driving after boiler, other environment systems are passed sequentially through with certain pressure outflow
System and each test bay simultaneously constitute circulation.So if using the heat-exchange system of certain test bay as heat source, heating can be direct after water system
Hot water as other test bays.Each system is again relatively independent simultaneously, can individually open or close, influencing water temperature does not influence it but
Its system uses.A branch need to only be added by increasing laboratory from now on, and overall pipeline remains unchanged.Cooling water and chilled water pipeline
It is substantially similar, only change boiler into air-cooled unit and freezing unit.
The circulation main body pipeline of test bay is as shown in Fig. 2, be divided into 1, cooling water heat exchange module；The heat exchange of 2 chilled waters
Module；3, hot water heat exchange module；4, test bay heat exchange module.Wherein each heat exchange module is realized by heat-exchangers of the plate type, object
The isolation of the road Li Shangge water system.Recirculated water first passes through vacuum tank by water pump driving and keeps pressure, then passes sequentially through cooling water and changes
Hot plate, chilled water heat exchanger plates, hot water heat exchanger plates reach laboratory's heat exchanger plates after reaching set temperature, are controlled by ratio valve opening
Test bay cooling water temperature.The circulating water temperature of each test bay can self-setting do not influenced by other test bays.
The public fresh air system of laboratory is used as laboratory's fresh air supply, as shown in figure 3, fresh air is double by hot water, cold water
Heat exchange is sent between each test bay or preparation after reaching set temperature, and new air temperature is controlled by hot water, cold valves aperture, and is led to here
Cross the hot water of heat exchanger plates, cold water is can to make full use of the heat of water system in this way from hot-water heating system and chilled water system
Energy.Influence of the varying environment temperature to burning and exhausting when cooperating the operation of this system analog vehicle of indoor fan.
Above-mentioned is hardware facility arrangement of the invention, more than the accurate control of realization test bay conditional systems and engine
The recycling of heat, it is also necessary to develop related software and carry out real-time control, this is also marrow place of the invention.Specific software operation
System can be different, as long as meeting control logic, so not being described in detail here, only introduce the related control of core the most
Logic processed.(control logic of following figure 4 to Fig. 6 mainly acts on test bay circulation shown in Fig. 2)
The judgement of the control logic first step is as shown in figure 4, operating mode judges:
1) judged according to water temperature state,
2) after hot water water temperature reaches requirement, enter hot-water mode if boiler is opened, be if boiler does not open judgement
No continuation hot-water mode, if then entering hot-water mode；If it is not, then come back to step 1) whether reached according to water temperature require into
Row judgement；
3) when hot water water temperature not up to requires, into cold water mode if boiler is not opened；If boiler open if judgement be
No continuation cold water mode, if then entering cold water mode；If it is not, then come back to step 1) whether reached according to water temperature require into
Row judgement.
Two, rate-determining steps are specific as follows (as shown in Figure 5) under hot-water mode:
1) judge the difference between heat exchange temperature setting value and temperature actual value,
If 2) actual value < setting value, closing freezing water valve and cooling water valve are controlled, PID control is opened by hot water valve
Valve opening is heated to recirculated water；
If 3) actual value > setting value, if hot water valve aperture > 0% at this time, first closes hot water valve, if hot water valve aperture
Cooling water valve is opened when=0%, and cooling water valve aperture is adjusted to circulating water cooling to actual value=setting value by PID；
4) when cooling water valve aperture reaches 100%, however it remains when actual value > setting value, it is permanent to adjust cooling water valve aperture
Fixed while to open freezing water valve to 80%, adjusting chilled water valve opening by PID reduces circulating water temperature to actual value=set
Set value.
Two, rate-determining steps are specific as follows (as shown in Figure 6) under cold water mode:
1) judge the difference between the temperature actual value of heat exchange and setting value,
If 2) actual value≤setting value, closes hot water valve, cooling water valve and freezing water valve and water temperature is waited to rise；
If 3) actual value > setting value, and hot water valve aperture is not up to 100%, by PID control hot water valve aperture, adjusts
Water temperature；
4) when hot water valve aperture has reached 100%, however it remains when actual value > setting value, adjust hot water valve aperture and arrive
80%, cooling water valve is opened, and adjusting cooling water valve aperture by PID reduces circulating water temperature；
5) when cooling water valve aperture has reached 100%, however it remains when actual value > setting value, adjust cooling water valve aperture
To 80%, freezing water valve is opened, and adjusting chilled water valve opening by PID reduces circulating water temperature.
Heat recovery is as shown in Figure 7.Present engine test has to recirculated water water temperature and laboratory's environment temperature
Requirement." cold water mode " shown in fig. 6 for test bay is exhaust-heat absorption, and " hot-water mode " shown in fig. 5 is waste heat
It utilizes.After having test bay to start in advance and absorbing waste heat with " cold water mode ", post-opening test bay can use " hot water mould
Formula " warming-up makes recirculated water reach setting temperature as early as possible, saves time；Fresh air system is equivalent to test bay air-conditioning, can adjust
Save room temperature makes rapidly environment temperature up to standard with the cooperation of indoor circulation blower, while fresh air system can be used between winter prepares
System is used when air-conditioning, is heated up using hot water heat exchange plate between preparation, energy saving；Other systems for needing hot water are according to examination
It tests room to need to increase, as long as the heat exchange of one branch of addition and heat exchanger plates, either water or wind heat exchange are all more convenient.
Claims (1)
1. a kind of engine testing room residual-heat utilization method, comprises the steps of:
One, operating mode judges:
1) judged according to water temperature state,
2) after hot water water temperature reaches requirement, if boiler open if enter hot-water mode, if boiler do not open judge whether after
Continuous hot-water mode, if then entering hot-water mode；Sentenced if it is not, then coming back to step 1) according to whether water temperature reaches requirement
It is disconnected；
3) when hot water water temperature not up to requires, into cold water mode if boiler is not opened；If boiler open if judge whether after
Continuous cold water mode, if then entering cold water mode；Sentenced if it is not, then coming back to step 1) according to whether water temperature reaches requirement
It is disconnected.
The temperature requirement of cold water mode and hot-water mode is set according to boiler test room required temperature.
Two, rate-determining steps are specific as follows under hot-water mode:
1) judge the difference between heat exchange temperature setting value and temperature actual value,
If 2) actual value < setting value, closing freezing water valve and cooling water valve are controlled, PID control valve is opened by hot water valve
Aperture is heated to recirculated water；
If 3) actual value > setting value, if hot water valve aperture > 0% at this time, first closes hot water valve, if hot water valve aperture=0%
Shi Kaiqi cooling water valve adjusts cooling water valve aperture to circulating water cooling to actual value=setting value by PID；
4) when cooling water valve aperture reaches 100%, however it remains when actual value > setting value, adjust cooling water valve constant opening degree and arrive
80%, while freezing water valve is opened, adjusting chilled water valve opening by PID reduces circulating water temperature to actual value=setting value.
Two, rate-determining steps are specific as follows under cold water mode:
1) judge the difference between the temperature actual value of heat exchange and setting value,
If 2) actual value≤setting value, closes hot water valve, cooling water valve and freezing water valve and water temperature is waited to rise；
If 3) actual value > setting value, and hot water valve aperture is not up to 100%, by PID control hot water valve aperture, adjusts water
Temperature；
4) when hot water valve aperture has reached 100%, however it remains when actual value > setting value, adjusting hot water valve aperture to 80%,
Cooling water valve is opened, and adjusting cooling water valve aperture by PID reduces circulating water temperature；
5) when cooling water valve aperture has reached 100%, however it remains when actual value > setting value, adjust cooling water valve aperture and arrive
80%, freezing water valve is opened, and adjusting chilled water valve opening by PID reduces circulating water temperature.
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| CN201910638847.5A CN110296623B (en) | 2019-07-16 | 2019-07-16 | Engine laboratory waste heat utilization method |
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|---|---|---|---|
| CN201910638847.5A CN110296623B (en) | 2019-07-16 | 2019-07-16 | Engine laboratory waste heat utilization method |
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| CN110296623B CN110296623B (en) | 2020-08-14 |
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| CN101701873A (en) * | 2009-11-13 | 2010-05-05 | 武汉理工大学 | Automobile engine tail gas waste-heat and electricity converting stand test device and method for controlling same |
| CN101979861A (en) * | 2010-10-18 | 2011-02-23 | 石金成 | Method and system for utilizing engine waste heat |
| DE102011053091A1 (en) * | 2011-08-29 | 2013-02-28 | Fev Gmbh | System for waste heat utilization during cooling of industrial or power device, particularly engine test stand, has cooling tower for delivering thermal energy to environment, and heating system for supplying hot water |
| CN105539065A (en) * | 2015-12-21 | 2016-05-04 | 浙江工商大学 | Automobile engine waste heat recycling air conditioner controlling method |
| CN205422979U (en) * | 2016-03-15 | 2016-08-03 | 苏州华业检测技术服务有限公司 | Tail gas waste heat recovery utilizes system for engine testing room |
| CN105822455A (en) * | 2016-05-13 | 2016-08-03 | 成都宇能通能源开发有限公司 | Device for preparing hot water by using waste heat of automobile engine |
| US20160290280A1 (en) * | 2015-04-02 | 2016-10-06 | Symbrium, Inc. | Engine test cell |
| US20190049340A1 (en) * | 2017-08-11 | 2019-02-14 | Victor Garcia | System and methods for testing an engine |
| CN208795499U (en) * | 2018-09-06 | 2019-04-26 | 北京福田康明斯发动机有限公司 | Cooling water recirculation system and engine rig test room |
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2019
- 2019-07-16 CN CN201910638847.5A patent/CN110296623B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701873A (en) * | 2009-11-13 | 2010-05-05 | 武汉理工大学 | Automobile engine tail gas waste-heat and electricity converting stand test device and method for controlling same |
| CN101979861A (en) * | 2010-10-18 | 2011-02-23 | 石金成 | Method and system for utilizing engine waste heat |
| DE102011053091A1 (en) * | 2011-08-29 | 2013-02-28 | Fev Gmbh | System for waste heat utilization during cooling of industrial or power device, particularly engine test stand, has cooling tower for delivering thermal energy to environment, and heating system for supplying hot water |
| US20160290280A1 (en) * | 2015-04-02 | 2016-10-06 | Symbrium, Inc. | Engine test cell |
| CN105539065A (en) * | 2015-12-21 | 2016-05-04 | 浙江工商大学 | Automobile engine waste heat recycling air conditioner controlling method |
| CN205422979U (en) * | 2016-03-15 | 2016-08-03 | 苏州华业检测技术服务有限公司 | Tail gas waste heat recovery utilizes system for engine testing room |
| CN105822455A (en) * | 2016-05-13 | 2016-08-03 | 成都宇能通能源开发有限公司 | Device for preparing hot water by using waste heat of automobile engine |
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| CN110296623B (en) | 2020-08-14 |
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