CN105416009B - Power-equipment liquefied gas bottle cooling capacity recovering method - Google Patents
Power-equipment liquefied gas bottle cooling capacity recovering method Download PDFInfo
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- CN105416009B CN105416009B CN201510861424.1A CN201510861424A CN105416009B CN 105416009 B CN105416009 B CN 105416009B CN 201510861424 A CN201510861424 A CN 201510861424A CN 105416009 B CN105416009 B CN 105416009B
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
- F17C7/02—Discharging liquefied gases
- F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H2001/3286—Constructional features
- B60H2001/3289—Additional cooling source
Abstract
The present invention relates to a kind of power-equipment liquefied gas bottle cooling capacity recovering method using LNG as fuel.The cryogenic heat exchanger of the refrigerating working medium same or like with the original air-conditioning system working medium of power-equipment is filled with by an inside, collect LNG and vaporize or heating the cryogenic cold energy of pressurization, and cryogenic heat exchanger entrance is connect into pressure duct after original air-conditioning or refrigeration system compressor, cryogenic heat exchanger outlet connects original air-conditioning condenser.It is compressed by the compressor rear refrigerating working medium and flows through cryogenic heat exchanger and decompression is cooled down rapidly by ultralow temperature LNG, so as to reduce original air-conditioning or refrigeration system mechanical load, improve efficiency, simultaneously by reducing original refrigerant compression acc power, reducing compressor rotary speed, the original air-conditioning condenser heat exchange area of reduction, to match the system synthesis refrigerating capacity after the recovery of LNG cold energy and air-conditioning or refrigerating operaton parameter, make air-conditioning or refrigeration system holistic cost also lower than original system, and do not change original air-conditioning system use habit.
Description
Technical field
The present invention relates to the recovery profit that the power-equipment using LNG as fuel consumes caused useless cold energy in Fuel Process
With method, specifically a kind of power-equipment liquefied gas bottle cooling capacity recovering method.
Background technology
The liquid lng that various forms of transport using LNG as fuel use is incubated using high-vacuum insulation, keeps low temperature
Low temperature inside storage container, to avoid vaporization and discharge less as far as possible in storage.But because liquefied gas is ultralow in use
Geothermal liquid（- 120--160 degrees Celsius）Can not directly it utilize, it is necessary to could be utilized, have in vaporization a large amount of by engine after gasification
Cold energy be released, but because of liquid lng ultralow temperature and inflammable and explosive property, these colds are never used directly and unrestrained
Take, this is also the LNG fuel costs major reason higher compared to other fuel costs.
Some technologies of existing LNG cold energy uses, but be all to use the cold energy independently of original power-equipment air-conditioning system
Extraction and reutilization technology, its system complex, cost are high, it is difficult to implement.
The content of the invention
The present invention is directed to problem above, there is provided a kind of power for being easily achieved LNG cold energy recycles of very low cost is set
Standby liquefied gas bottle cooling capacity recovering method.
The present invention solves the technical scheme that its technical problem uses：
A kind of power-equipment liquefied gas bottle cooling capacity recovering method, is carried out as follows：One cryogenic heat exchanger is connected
It is connected in the pressure duct between original power-equipment air-conditioning or the compressor and condenser of refrigeration system, cryogenic heat exchanger is filled with
Refrigerating working medium identical with original power-equipment air-conditioning or refrigeration system, while the power of compressor and condenser and heating power are again
Match somebody with somebody；By liquefied gas bottle come out deep cooling LNG enter cryogenic heat exchanger, with by the high temperature heat-carrying working medium of compressor boost in low temperature
Heat exchange in heat exchanger, high temperature heat-carrying working medium reduce rapidly high-pressure because obtaining LNG cold energy, so reduce original air-conditioning or
The power consumption of refrigeration system, deep cooling LNG obtain heat energy and are vaporized heating, used afterwards for power-equipment.
Further, the power of described compressor and condenser is with the method that heating power matches again：Changed according to low temperature
The maximum recovery cold energy ability of hot device, reduce original refrigerant compression acc power or reduce compressor rotary speed, reduce original refrigeration system
Condenser heat exchange area or heat-sinking capability；Make to have cold recoverable air-conditioning or mechanical refrigeration power that refrigeration system is equipped with=
The cold energy power that the average refrigeration work consumption of heat exchange+condenser balance that original total refrigeration work consumption-cryogenic heat exchanger obtains loses.
Further, described identical refrigerating working medium, refer to that cryogenic heat exchanger is used for the refrigerating working medium and power of heat exchange
The refrigerating working medium that equipment original uses is identical or with thermal performance alternative mutually, and the refrigerating working medium is in cryogenic heat exchanger
Do not solidify inside.
Further, described cryogenic heat exchanger is arranged on condenser top position, and low temperature is coagulated with reducing refrigerating working medium
The requirement of solid point, while make cryogenic heat exchanger continue to heat ability with LNG vaporization when air-conditioning or refrigeration system are stopped transport.
Using the present invention of above-mentioned technical proposal, compared with prior art, its advantage is：
Due to taking full advantage of original air-conditioning refrigeration system equipment in power-equipment system, only increase a LNG low temperature
Heat exchanger（But it can partly substitute original LNG vaporization device）And a small amount of connecting line, realize LNG's without any movable member can
Cold energy high efficiente callback utilizes, and simple and practical, cost is extremely low, and reliability is high；And no matter how much outside cold energy recovery does not influence
The use of air-conditioning, any operating habit of original air-conditioning refrigeration system is not changed, it is easier to by receiving popularization yet.For 10kg/
H-500kg/h LNG dynamical system, recuperable cold energy are up to 1.5-75kw cold energy.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention；
In figure：1- cryogenic heat exchangers；2- air conditioner coolants；3- compressors；4- condensers；5- evaporators；6- mounted temperatures are exhausted
Hot gas bottle.
Embodiment
The present invention is further elaborated with reference to embodiments, but the present embodiment does not form any restrictions to the present invention.
Power-equipment in the present embodiment is LNG fuel bus cars, and LNG storage low-temperature (low temperature) vessels are mounted temperature thermal insulation gas
Bottle, the original air conditioner coolant 2 of automobile is freon R22.
Referring to Fig. 1, cryogenic heat exchanger 1 has two loops, and a loop is LNG loops：The depth of mounted temperature insulated gas cylinder 6
Cold LNG outputs are connected to the LNG liquid inlet port of cryogenic heat exchanger 1, and the LNG outlet connections of cryogenic heat exchanger 1 heat heat exchanger
Or pressure maintaining valve, send automobile engine to burn afterwards；Another loop is that air conditioner coolant 2 is freon R22 loops：Cryogenic heat exchanger
1 entrance connects the outlet of original automobile air conditioner compressor 3, and cryogenic heat exchanger 1, which exports, then connects the former air-conditioned condenser of automobile
4。
Cold energy reclaims principle：
After air conditioning for automobiles unlatching, compressor 3 compresses freon R22 working medium in air-conditioning system, the working medium band after compression
There is higher temperature and pressure, be pressed in cryogenic heat exchanger 1, now there is the LNG liquid of ultralow temperature in cryogenic heat exchanger 1 simultaneously
Body flows therethrough, when R22 working medium passes through cryogenic heat exchanger 1 with LNG liquid carry out it is cold and hot exchange, LNG liquid is heated after exchange
Vaporization, temperature reduction pressure also reduces after R22 working medium absorbs LNG cold energy, or even has part R22 to be liquefied, and absorbs LNG
R22 after cold energy is sent to the original condenser 4 of air-conditioning through the outlet of cryogenic heat exchanger 1.
If R22 is absorbed, excessive cold energy is liquefied or pressure is very low, can heat supercharging to R22 by condenser 4, with
The evaporator 5 for being easy to enable R22 to reach original air-conditioning system discharges cold energy, realizes final cold energy application；If R22 working medium exists
The cold deficiency that cryogenic heat exchanger 1 absorbs, fails the R22 gases of original compressor outlet elevated pressures dropping to authorized pressure temperature
Degree parameter value, then can continue to carry out heat exchange with air in condenser 4 and decrease temperature and pressure, the suitable R22 of pressure and temp are sent
Cold energy is extracted in the evaporator 5 of original air-conditioning system.
Analyzed more than, the former air-conditioned condenser 4 of automobile is also critically important to stablizing air conditioner operation parameters.
The installation site of cryogenic heat exchanger 1 in the present embodiment is arranged on the position higher than original air-conditioning condenser 4.It can incite somebody to action
The refrigerating working medium R22 that cryogenic heat exchanger 1 is condensed takes away heat exchanger surface, prevents R22 from being solidified in lower temperature；Exist simultaneously
LNG automobiles continue to consume LNG, when air-conditioning does not work, because the compressor 3 of air-conditioning has been stopped, and the front end of cryogenic heat exchanger 1
I.e. compressor of air conditioner partial circuit can be blocked, and cryogenic heat exchanger 1 and the grade pipeline of condenser 4 of rear portion pipeline and air-conditioning are by shape
Into localized heat tube effect.Because working medium R22 boiling points are -41 degree, -120 degree when LNG liquid is connected with far above cryogenic heat exchanger 1 are left
Right temperature, R22 temperature are less than the temperature of condenser 4 again（Because the temperature of condenser 4 is substantially identical with ambient air temperature degree）, therefore R22 working medium
Can be condensed liquefaction when reaching 1 surface of cryogenic heat exchanger, and the position of cryogenic heat exchanger 1 forms negative pressure, but because cryogenic heat exchanger 1 is installed
Position is higher than the position of air-conditioning condenser 4, therefore condensed liquid can naturally flow to the position of air-conditioning condenser 4, and in air conditioner condensation
The position of device 4 is vaporized to form malleation again, which forms the circulation of local heat pipe so that cryogenic heat exchanger 1 no matter air-conditioning whether
Work is respectively provided with heats vaporization to LNG liquid, while this local heat pipe circulation can make the temperature of condenser 4 be less than original sky
The temperature of evaporator 5 of adjusting system, can avoid evaporator 5 from being conducted heat with condenser 4, be more beneficial for original air-conditioning and be incubated in the winter time.
For the cold energy as much as possible using LNG, reduce the power consumption of original air-conditioning system, to original vehicle air conditioning
Compressor 3, condenser 4 and cryogenic heat exchanger 1 carry out matched design.The heat exchange area of cryogenic heat exchanger 1 is by can absorb 100%
The maximum engine cold energy design that LNG vaporization heating can discharge when using LNG, evaporator 5 then pressed under minimum air flow speed
The exchange capability of heat design of most 10% unnecessary LNG recovery cold energy can be balanced, under maximum air flow speed, LNG consumes and can
The double requirements of external heat-sinking capability with 70% specified refrigerating capacity of air-conditioning system under idling.Condenser 4 after accounting changes
Hot area will be reduced to original 30-40%, and the power capacity of compressor 3 or speed are transferred to original 30%-50% cans and meet need
Will, improved air conditioner refrigerating machinery can consume only original 1/5-1/3.It is low as huge discharge is used instead after new car optimization design
Press low power compressor of air conditioner 3 and use the condenser 4 of more small area instead, its cost reduced can be higher than the low temperature newly increased and change
The expense of hot device 1 and its pipeline.Because the and can of cryogenic heat exchanger 1 also serves as the effect of LNG vaporization device, can greatly reduce original
LNG vaporization device heat exchange area, it might even be possible to cancel.For old LNG fuel vehicles air-conditioning system, as increased, LNG is cold recoverable to be changed
Make, can suitably reduce the heat exchange area of cryogenic heat exchanger 1, simply LNG cold energy uses rate reduces, and improvement expenses is also extremely
It is cheap, but still considerable energy-saving effect can be obtained.
Above-mentioned cold energy of liquefied natural gas recovery method, because without any movable member, being not required to carry out original system big change
Make, it is possible to realize that LNG cold energy high efficiente callback utilizes, cost is extremely low.And regardless of whether there is outside cold energy input not shadow
The use of air-conditioning is rung, regardless of whether the vaporization that the original LNG fuel of vehicle is nor affected on using air-conditioning heats performance, and is not also changed
Any use habit of original air-conditioning system, its reliability, security, practicality is extremely strong, easily by receiving popularization.For
20kg/h or so LNG fuel bus cars calculate, and recuperable cold energy is up to 3-4kw cold energy recovery value, average
Operation 10 hours daily, annual to use 200 days, per KWh cold energy by 1 yuan of calculating, then the cold energy value reclaimed every year will reach（3-
4）KW*10*200*1=6000-8000 members.As new car carries out compatibility design, then without extra cost input, as usual
Car transforms totle drilling cost not over 1000 yuan, and its economic value is very prominent, can greatly promote the sexual valence expense effect that LNG cars use
Than.
Preferably feasible embodiment of the invention is the foregoing is only, not thereby limits to the interest field of the present invention,
All equivalence changes made with present specification, it is both contained within the interest field of the present invention.
Claims (1)
- A kind of 1. power-equipment liquefied gas bottle cooling capacity recovering method, it is characterised in that：By a cryogenic heat exchanger（1）It is connected to original power-equipment air-conditioning or the compressor of refrigeration system（3）With condenser（4） Between pressure duct in, cryogenic heat exchanger（1）Refrigerating working medium identical with original power-equipment air-conditioning or refrigeration system is filled with, together When compressor（3）And condenser（4）Power matched again with heating power；The deep cooling LNG come out by liquified gas container enters low temperature Heat exchanger（1）, with by the high temperature heat-carrying working medium of compressor boost in cryogenic heat exchanger（1）Middle heat exchange, high temperature heat-carrying working medium because Obtain LNG cold energy and reduce high-pressure rapidly, and then reduce the power consumption of original air-conditioning or refrigeration system, deep cooling LNG is obtained Obtain heat energy and be vaporized heating, used afterwards for power-equipment；Described compressor（3）And condenser（4）Power be with the method that heating power matches again：According to cryogenic heat exchanger（1） Maximum recovery cold energy ability, reduces original refrigeration compressor（3）Power reduces compressor rotary speed, reduces original refrigeration system Condenser（4）Heat exchange area or heat-sinking capability；Make to have cold recoverable air-conditioning or mechanical refrigeration power that refrigeration system is equipped with= Original total refrigeration work consumption-cryogenic heat exchanger（1）Average refrigeration work consumption+the condenser of the heat exchange of acquisition（4）Balance the cold energy lost Power；Described identical refrigerating working medium, refers to cryogenic heat exchanger（1）Refrigerating working medium and power-equipment original air-conditioning for heat exchange The refrigerating working medium that system uses is identical or with thermal performance alternative mutually, and the refrigerating working medium is in cryogenic heat exchanger （1）Do not solidify inside；Described cryogenic heat exchanger（1）Installed in condenser（4）Top position, low temperature freezing point is wanted with reducing refrigerating working medium Ask, while make cryogenic heat exchanger when air-conditioning or refrigeration system are stopped transport（1）Continue to heat ability with LNG vaporization.
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| CN201510861424.1A CN105416009B (en) | 2015-12-01 | 2015-12-01 | Power-equipment liquefied gas bottle cooling capacity recovering method |
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| CN201510861424.1A CN105416009B (en) | 2015-12-01 | 2015-12-01 | Power-equipment liquefied gas bottle cooling capacity recovering method |
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| CN105416009B true CN105416009B (en) | 2017-12-05 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3256797A1 (en) | 2015-02-12 | 2017-12-20 | Carrier Corporation | Chiller for refrigeration system |
| CN106224768B (en) * | 2016-08-25 | 2018-10-23 | 广西大学 | A kind of liquefied natural gas vaporization cold energy reclamation device |
| CN106382463A (en) * | 2016-11-29 | 2017-02-08 | 中国海洋石油总公司 | Technique and device for cold replacement and gradient utilization of LNG receiving station |
| CN107477357A (en) * | 2017-08-22 | 2017-12-15 | 浙江绿谷光伏科技有限公司 | Ultralow temperature liquid gas energy discharges comprehensive utilization device |
| CN116464917A (en) * | 2023-04-26 | 2023-07-21 | 山东齐鲁氢能研究院有限公司 | Integrated hydrogen-adding device based on natural gas pipe network system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102423997A (en) * | 2011-09-16 | 2012-04-25 | 上海交通大学 | Automobile air conditioning system realizing supercooling through latent heat of vaporization of liquefied natural gas (LNG) vaporization |
| EP2969615B1 (en) * | 2013-03-13 | 2021-06-02 | Bergstrom, Inc. | Air conditioning system utilizing thermal capacity from expansion of compressed fluid |
| CN204472492U (en) * | 2015-01-16 | 2015-07-15 | 东风商用车有限公司 | A kind of commercial refrigeration car LNG cold energy recovery system |
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Effective date of registration: 20171107 Address after: 063200 Hebei District of Tangshan City Caofeidian Tanghai eleven team headquarters Applicant after: Tangshan City wisdom Technology Co., Ltd. Address before: 063200 Hebei province Tangshan City Caofeidian area Tanghai New District No. 195 west off Applicant before: Liu Yintong |
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Effective date of registration: 20191216 Address after: 210000 No.8, Shanxi Road, Gulou District, Nanjing City, Jiangsu Province Patentee after: Dong Jinhuan Address before: 063200 Team Headquarters of the Eleventh Team of Tanghai Town, Caofeidian District, Tangshan City, Hebei Province Patentee before: Tangshan City wisdom Technology Co., Ltd. |
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Effective date of registration: 20200323 Address after: 717400 Huiyuan community, Ansai District, Yanan City, Shaanxi Province Patentee after: Ansai Lvyuan oil and Gas Technology Service Co., Ltd Address before: 210000 No.8, Shanxi Road, Gulou District, Nanjing City, Jiangsu Province Patentee before: Dong Jinhuan |