CN105180492B - A kind of complex supercharge auxiliary twin-stage vapor compression refrigeration system and its method of work - Google Patents
A kind of complex supercharge auxiliary twin-stage vapor compression refrigeration system and its method of work Download PDFInfo
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- CN105180492B CN105180492B CN201510554661.3A CN201510554661A CN105180492B CN 105180492 B CN105180492 B CN 105180492B CN 201510554661 A CN201510554661 A CN 201510554661A CN 105180492 B CN105180492 B CN 105180492B
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Abstract
A kind of complex supercharge auxiliary twin-stage vapor compression refrigeration system and its method of work, belong to mechanical refrigeration techniques field.The system completes the precommpression of refrigerant vapour using the supercharging performance for flashing shock wave, realizes reduction refrigeration compressor pressure ratio purpose；The two-phase laminated flow of liquid phase cryogen is completed using the expansion characteristics of dilatational wave, the two-stage refrigeration circulation of constant entropy expansion+isenthalpic throttling is realized.Refrigerant enters in four port wave rotor boosters to complete to be pressurized in advance after evaporator to be mixed with separator gas phase mouth air-flow, into refrigeration compressor supercharging, flashed after condensed in saturated liquid form into four port wave rotor boosters, the two-phase mixture of formation is after separator, liquid phase section stream enters evaporator refrigeration, and gas phase enters refrigeration compressor after being mixed with pre- pressurised steam.The simple system, it is big to overcome in vapor-compression refrigerant cycle compressor pressure ratio, and without multi-stage compression cascade EDFA problem, has the advantages that higher than traditional twin-stage vapor compression refrigeration system Energy Efficiency Ratio.
Description
Technical field
The present invention relates to a kind of complex supercharge auxiliary twin-stage vapor compression refrigeration system and its method of work, belong to mechanical system
Refrigeration technique field.
Background technology
Water（R718）As a kind of natural refrigerating and refrigerating medium, with high latent heat, nontoxic, non-ignitable not quick-fried and environment-friendly spy
Property（Global warming index GWP=0, consumption ozone latent energy value ODP=0), particularly R718 theoretical Energy Efficiency Ratio is high（COP）, in recent years
To cause world's extensive concern again.Correlative study compare R718 and conventional refrigerant (R134a, R22 etc.) system COP,
Operating cost, refrigerating capacity and to the difference in terms of the influence of environment, find, condensation temperature 20 identical in system other specification
More than DEG C and evaporating temperature be 5K when, water as refrigerant compressibility COP value highests.R718 is used for vapour pressure contraction
Cooling system, another advantage is that refrigerant, refrigerating medium and cooling water are same substance, and such evaporator and condenser may be designed to directly
Contact heat exchange is connect, heat exchange efficiency is high.At present, though R718 can be used in multi-stage vapor compression refrigeration system, due to needing level
Between cooling device initial investment it is very high, and this R718 compressors have the compression ratio more much larger than conventional refrigerant（R134a
2 times）With big volume, high rotating speed, huge discharge equipment size, seriously hinder R718 refrigerants in vapor compression refrigeration system
Extensive use.
Using the wave rotor based on UNSTEADY FLOW process（Wave Rotor）Booster, can be achieved charging efficiency higher than steady
State process charging efficiency, refrigeration compressor pressure ratio, level can be effectively reduced for the precommpression in multi-stage vapor compression refrigeration system
Number and size（Under high pressure, specific volume reduction）, it is that approximate constant entropy expansion can improve system effectiveness with time-varying isenthalpic throttling.
The content of the invention
In order to overcome problems of the prior art, the present invention provides a kind of complex supercharge auxiliary twin-stage vapour pressure contraction
Cooling system and its method of work, its object is to the precompressed that the supercharging performance for making full use of flash distillation shock wave completes refrigerant vapour
Contracting, realizes reduction refrigeration compressor pressure ratio purpose；The two-phase laminated flow of liquid phase cryogen is completed using the expansion characteristics of dilatational wave, is realized
The two-stage refrigeration circulation of constant entropy expansion+isenthalpic throttling.
The technical solution adopted by the present invention is：A kind of wave additional mechanical supercharging twin-stage vapor compression refrigeration system, it includes one
Individual choke valve, gas-liquid separator, condenser, refrigeration compressor, vavuum pump, evaporator, it also includes a four port wave rotors
Booster, carries out pre- supercharging to refrigerant vapor to reduce the pressure ratio of refrigeration compressor using four port wave rotor boosters.It is described
The outlet of evaporator is connected with the low-pressure steam inlet of four port wave rotor boosters, and the supercharging of four port wave rotor boosters is steamed
Vapor outlet is connected using the entrance of pipeline and refrigeration compressor, and the gaseous phase outlet of gas-liquid separator also uses pipeline and refrigerant compression
The entrance connection of machine；The outlet conduit of the refrigeration compressor and the entrance of condenser are connected, the outlet conduit of condenser and four
The driving fluid intake connection of port wave rotor booster, the decompression steam (vapor) outlet pipeline and gas of four port wave rotor boosters
The entrance connection of liquid/gas separator；The liquid-phase outlet pipeline of the gas-liquid separator is connected with throttling valve inlet, and throttling valve outlet connects
Connect the entrance of evaporator；The vavuum pump connects the outlet conduit of evaporator.
A kind of method of work of described wave additional mechanical supercharging twin-stage vapor compression refrigeration system uses the following steps：
（a）Refrigeration is realized in refrigeration working medium constant temperature, level pressure heat absorption in evaporator, is become after saturated vapor by four port ripples turn
The L of sub- boosterPPort enters four port wave rotor boosters；
（b）The M of four port wave rotor boostersPAfter the gas phase of port is mixed with the gas phase of gas-liquid separator gaseous phase outlet,
Into Refrigeration vapor compression machine, the high temperature and high pressure gas of formation increase via entering four port wave rotors after condenser with saturation liquid
The H of depressorPPort, flashes the shock wave compression of formation from the L of four port wave rotor boostersPThe low-pressure steam that port enters；
（c）Working medium after flash distillation flows out the L of four port wave rotor boosters in two-phase formTPort, into gas-liquid separation
Device, forms gas phase and liquid phase, and liquid phase enters evaporator after choke valve decrease temperature and pressure.
The beneficial effects of the invention are as follows：This complex supercharge auxiliary twin-stage vapor compression refrigeration system and its method of work are carried
The wave additional mechanical supercharging both vapor compression WVC Refrigeration Techniques gone out, compared to existing machinery both vapor compression MVC and thermodynamic steam compression TVC
Refrigeration Technique, with following technical advantage：
1st, realize and the steam for carrying out flash-pot is pressurized in advance using four port wave rotor boosters, reach reduction pressure
The purpose of contracting machine pressure ratio；
2nd, four port wave rotor booster precompressed are condensed to after isentropic Compression, compression that temperature is low, effectively reduce condenser duty,
Gas phase is mixed with working medium gas phase after preexpanding after precommpression, with from cooling characteristics, eliminates intercooler；
3rd, the saturation liquid phase that condensed device comes out constant entropy expansion in four port wave rotor boosters, instead of traditional twin-stage section
The throttling process in multi-stage refrigerating technique is flowed, refrigeration efficiency is than improving.
4th, four port wave rotor boosters are also equipped with outstanding band liquid operability in addition to preexpanding, pre-compression function
Can, the Two-ports structure of wave rotor can ensure that equipment produces the excellent band liquid operating characteristics of condensing droplet after preexpanding.
Brief description of the drawings
Fig. 1 is a kind of complex supercharge auxiliary twin-stage vapor compression refrigeration system.
Fig. 2 is a kind of P-h figures of complex supercharge auxiliary twin-stage vapor compression refrigeration system.
In figure：1st, choke valve, 2, gas-liquid separator, 3, four port wave rotor boosters, 4, condenser, 5, refrigerant compression
Machine, 6, vavuum pump, 7, evaporator； HP, driving fluid intake, LP, low-pressure steam inlet, MP, pressurised steam outlet, LTDecompression
Steam (vapor) outlet.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in more detail.
Embodiment 1 utilizes four port wave rotor booster additional mechanical supercharging twin-stage vapor compression refrigeration systems.
Fig. 1 shows a kind of complex supercharge auxiliary twin-stage vapor compression refrigeration system.In figure, four port wave rotor boosters
Additional mechanical supercharging twin-stage vapor compression refrigeration system includes, choke valve 1, gas-liquid separator 2, four port wave rotor boosters 3, condensation
Device 4, vapour compression machine 5, vavuum pump 6, evaporator 7.The outlet of evaporator 7 and the low-pressure steam of four port wave rotor boosters 3
Entrance LPConnection, the pressurised steam outlet M of four port wave rotor boosters 3PIt is connected using pipeline with the entrance of refrigeration compressor 5,
The gaseous phase outlet of gas-liquid separator 2 is also connected using pipeline with the entrance of refrigeration compressor 5；The outlet conduit of vapour compression machine 5
It is connected with the entrance of condenser 4, the driving fluid intake H of the outlet conduit of condenser 4 and four port wave rotor boosters 3PEven
Connect, the decompression steam (vapor) outlet L of four port wave rotor boosters 3TIt is connected with pipeline with the entrance of gas-liquid separator 2；Gas-liquid separation
The liquid-phase outlet pipeline of device 2 is connected with the entrance of choke valve 1, the entrance of the outlet of choke valve 1 connection evaporator 7.
Refrigeration is realized in constant temperature, level pressure heat absorption to refrigeration working medium in the evaporator 7, is become after saturated vapor by four port wave rotors
The L of booster 3PPort enters four port wave rotor boosters 3；The M of four port wave rotor boosters 3PThe gas phase and gas-liquid of port
After the gas phase mixing of the gaseous phase outlet of separator 2, into Refrigeration vapor compression machine 5, the high temperature and high pressure gas of formation are via condenser 4
Enter the H of four port wave rotor boosters 3 with saturation liquid afterwardsPPort, flashes the shock wave compression formed from four port wave rotors
The L of booster 3PThe low-pressure steam that port enters；Working medium after flash distillation flows out four port wave rotor boosters 3 in two-phase form
LTPort, into gas-liquid separator 2, forms gas phase and liquid phase, liquid phase enters evaporator 7 after the decrease temperature and pressure of choke valve 1.
A kind of P-h figures of complex supercharge auxiliary twin-stage vapor compression refrigeration system shown in Fig. 2, as we can see from the figure F
The saturated vapor of A points is formed after the evaporation of the liquid refrigerant of point in the evaporator 7, the saturated vapor of A points is in four port wave rotors
B points are compressed to by isentropic procedure in booster 3, the superheated steam of B points forms C points, C points after being mixed with the Es " saturated vapors put
Steam is compressed to D points by the vapour compression machine 5 that pressure ratio reduces, cold by the effect condensation of condenser 4 to E point saturation liquid phase states
Liquid phase working fluid after solidifying expands isentropically to Es point two-phase working substance states in four port wave rotor boosters 3；It is depressured steam (vapor) outlet
LTThe two-phase working substance of outflow forms the saturation liquid phase of Es ' points and the saturated vapor of Es " points after gas-liquid separator 2, and it is full that Es ' is put
With liquid phase through the isenthalpic throttling of choke valve 1 to F points.
Embodiment 2 utilizes four port wave rotor booster additional mechanical supercharging twin-stage vapor compression heat pump systems.
Principle process and equipment arrangement are constant, are absorbed heat and then obtained the heat of condenser from environment using evaporator
Amount, can be achieved to utilize four port wave rotor booster additional mechanical supercharging twin-stage vapor compression heat pump systems.
Claims (1)
1. a kind of method of work of wave additional mechanical supercharging twin-stage vapor compression refrigeration system, twin-stage vapor compression refrigeration system includes
One choke valve（1）, gas-liquid separator（2）, condenser（4）, refrigeration compressor（5）, vavuum pump（6）, evaporator（7）, twin-stage
Vapor compression refrigeration system also includes a four port wave rotor boosters（3）, the evaporator（7）Outlet and four port ripples
Rotor booster（3）Low-pressure steam inlet（LP）Connection, four port wave rotor boosters（3）Pressurised steam outlet（MP）Adopt
With pipeline and refrigeration compressor（5）Entrance connection, gas-liquid separator（2）Gaseous phase outlet also use pipeline and refrigeration compressor
（5）Entrance connection；The refrigeration compressor（5）Outlet conduit and condenser（4）Entrance connection, condenser（4）Go out
Mouth pipeline and four port wave rotor boosters（3）Driving fluid intake（HP）Connection, four port wave rotor boosters（3）Drop
Press steam (vapor) outlet（LT）With pipeline and gas-liquid separator（2）Entrance connection；The gas-liquid separator（2）Liquid-phase outlet pipeline
With choke valve（1）Entrance is connected, choke valve（1）Outlet connection evaporator（7）Entrance；The vavuum pump（6）Connect evaporator
（7）Outlet conduit；Refrigeration working medium is in evaporator（7）Refrigeration is realized in middle constant temperature, level pressure heat absorption, is become after saturated vapor by four ends
Mouth wave rotor booster（3）Low-pressure steam inlet（LP）Into four port wave rotor boosters（3）；Four port wave rotor superchargings
Device（3）Pressurised steam outlet（MP）Gas phase and gas-liquid separator（2）After the gas phase mixing of gaseous phase outlet, into refrigerant compression
Machine（5）, the high temperature and high pressure gas of formation are via condenser（4）Four port wave rotor boosters are entered with saturation liquid afterwards（3）'s
Drive fluid intake（HP）, the shock wave compression formed is flashed from four port wave rotor boosters（3）Low-pressure steam inlet（LP）Enter
The low-pressure steam entered；Working medium after flash distillation flows out four port wave rotor boosters in two-phase form（3）Decompression steam (vapor) outlet
（LT）, into gas-liquid separator（2）, gas phase and liquid phase are formed, liquid phase enters evaporator after the decrease temperature and pressure of choke valve 1（7）；
It is characterized in that：Using the following steps：
（a）Refrigeration working medium is in evaporator（7）Refrigeration is realized in middle constant temperature, level pressure heat absorption, is become after saturated vapor by four port ripples turn
Sub- booster（3）Low-pressure steam inlet（LP）Into four port wave rotor boosters（3）；
（b）Four port wave rotor boosters（3）Pressurised steam outlet（MP）Gas phase and gas-liquid separator（2）Gaseous phase outlet
After gas phase mixing, into Refrigeration vapor compression machine（5）, the high temperature and high pressure gas of formation are via condenser（4）Afterwards with saturation liquid
Into four port wave rotor boosters（3）Driving fluid intake（HP）, the shock wave compression formed is flashed from four port wave rotors
Booster（3）Low-pressure steam inlet（LP）The low-pressure steam of entrance；
（c）Working medium after flash distillation flows out four port wave rotor boosters in two-phase form（3）Decompression steam (vapor) outlet（LT）, enter
Gas-liquid separator（2）, gas phase and liquid phase are formed, liquid phase passes through choke valve（1）Enter evaporator after decrease temperature and pressure（7）.
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| CN105509359B (en) * | 2015-12-24 | 2017-12-26 | 大连理工大学 | A kind of phase transformation wave rotor auto-cascading refrigeration system and its method of work |
| CN109682166A (en) * | 2018-12-03 | 2019-04-26 | 浙江大学 | A kind of emission recovery system that gas wave refrigeration is used for olefin polymetiation process |
| CN109579434A (en) * | 2018-12-11 | 2019-04-05 | 浙江大学 | A method of gas is discharged using outer circulation gas wave refrigeration recycling polyolefin device |
| CN111380240A (en) * | 2018-12-28 | 2020-07-07 | 青岛海尔空调电子有限公司 | Air conditioning system with two-stage compression |
| CN114100174B (en) * | 2021-11-24 | 2022-11-18 | 大连理工大学 | Heat pump rectification system of embedded wave rotor equipment |
| CN114562341B (en) * | 2022-02-24 | 2023-06-23 | 艾肯（江苏）工业技术有限公司 | Method for realizing power exchange network based on wave rotor equipment |
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