CN110486943A - The not exclusively cooling moderate and high temperature heat system of throttling among the more condensers of multi-stage compression - Google Patents
The not exclusively cooling moderate and high temperature heat system of throttling among the more condensers of multi-stage compression Download PDFInfo
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- CN110486943A CN110486943A CN201910834768.1A CN201910834768A CN110486943A CN 110486943 A CN110486943 A CN 110486943A CN 201910834768 A CN201910834768 A CN 201910834768A CN 110486943 A CN110486943 A CN 110486943A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/06—Superheaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
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- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses the not exclusively cooling more warm grade moderate and high temperature heat systems of throttling among a kind of more condensers of multi-stage compression.The present invention is made of evaporator, compressor at different levels, condenser at different levels, throttle valve at different levels, bypass throttle valve at different levels and regenerator at different levels, normal-temperature water can be required to heat according to technique by the way that different series is arranged, to produce normal domestic domestic hot-water and industrial high temperature hot water and high steam etc..Pass through the multi-stage compression and multi-stage condensing process of refrigerant, multiple laser heating is carried out to normal-temperature water, it is significantly reduced the heat exchange irreversible loss in normal-temperature water heating process with refrigerant, the compression of compressors at different levels is smaller, and cools down by bypass throttle valve reducing pressure by regulating flow to compressor air-discharging.Heating hot water heating pipeline in parallel can be used for rooms between condenser and regenerator, realize heat cascade utilization.
Description
Technical field
The present invention relates to technical field of heat pumps, not exclusively cold more particularly to throttling among a kind of more condensers of multi-stage compression
But moderate and high temperature heat system.
Background technique
In life and the demand of industrial centering high-temperature-hot-water and steam is very extensive, however produces high temperature hot water often
A large amount of electric power and fuel source can be consumed.Heat pump product has been made extensively as a kind of cleaning, efficient, stable heating equipment
With further increasing the efficiency of heat-pump apparatus to energy-saving and emission-reduction are pushed, promoting economic benefit has important practical significance and society
It can be worth.
Constant using conventional moderate and high temperature heat system condensing temperature, normal-temperature water directly heats within the condenser, normal-temperature water into
It is larger to export the temperature difference, is limited by condenser refrigerant and normal-temperature water heat transfer temperature difference, the heat transfer temperature difference of two side liquids in condenser
Distribution is serious uneven, causes the Average heat transfer temperature difference in condenser very big, and heat transfer process generates biggish irreversible loss, system
Efficiency is lower.Using the conventional single stage compression heat pump system of non-azeotropic working medium, evaporation is suitable with the temperature glide of condensation process,
The operating condition close suitable for heat source and heat sink side heat exchanging fluid temperature change, but for moderate and high temperature heat system, the temperature of heat source side
Degree variation is typically small, and the water of heat sink side or the temperature liter of steam are larger or very big, much larger than the temperature drop of heat source side liquid.And
For heat source and heat sink temperature across biggish operating condition, Conventional press compression is bigger, and compressor efficiency is low.
Summary of the invention
The present invention provides a kind of use multi-stage compression multi-stage condensing moderate and high temperature heat system, irreversible to solve heat transfer process
The problem that loss is big, compression ratio is big and system energy efficiency is low.
The skill that the not exclusively cooling moderate and high temperature heat system of throttling is taken among a kind of more condensers of multi-stage compression of the present invention
Art scheme is: 3≤i≤n-1, n >=4 in system；
The outlet of first order compressor 3 is connected with 4 working medium side entrance of first order condenser, and 3 working medium side of first order compressor goes out
Mouth overheats gas side entrance with second level regenerator 6 and is connected, and second level regenerator 6 overheats gas side outlet and 8 phase of high stage compressor
Even, 4 working medium side outlet of first order condenser is connected with 5 entrance of first order throttle valve, the outlet of second level throttle valve 11 and the first order
5 entrance of throttle valve is connected, and regenerator 6 two-phase fluid side outlet in the second level is connected with 5 entrance of first order throttle valve, first order throttling
The outlet of valve 5 is connected with 1 working medium side entrance of evaporator, and 1 working medium side outlet of evaporator is connected with 3 entrance of first order compressor；Second
The piping connection second level regenerator 6 that grade 9 working medium side outlet of condenser passes through setting second level bypass throttle valve 7；
(i-1)-th stage compressor outlet overheats gas side entrance with i-stage regenerator 12 and is connected, and i-stage regenerator 12 crosses hot gas
Side outlet is connected with 13 entrance of i-stage compressor, and the outlet of i-stage compressor 13 overheats gas side entrance phase with i+1 grade regenerator
Even, the outlet of i-stage compressor 13 is connected with 15 working medium side entrance of i-stage condenser, 15 working medium side outlet of i-stage condenser and the
I grades of 16 entrance of throttle valve connections, i+1 grade throttling valve outlet are connected with 16 entrance of i-stage throttle valve, i+1 grade regenerator two
Phase fluid side outlet is connected with 16 entrance of i-stage throttle valve, and the outlet of i-stage throttle valve 16 is connected with (i-1)-th grade of throttling valve inlet；
15 working medium side outlet of i-stage condenser is connected with 14 entrance of i-stage bypass throttle valve, the outlet of i-stage bypass throttle valve 14 and i-th
Grade 12 two-phase fluid side entrance of regenerator is connected, 12 two-phase fluid side outlet of i-stage regenerator and (i-1)-th grade of throttling valve inlet phase
Even；
(n-1)th stage compressor outlet overheats gas side entrance with n-th grade of regenerator 18 and is connected, and n-th grade of regenerator 18 crosses hot gas
Side outlet is connected with n-th grade of 19 entrance of compressor, and n-th grade of outlet of compressor 19 is connected with n-th grade of 17 working medium side entrance of condenser,
N-th grade of 17 working medium side outlet of condenser is connect with n-th grade of 10 entrance of throttle valve, n-th grade of outlet of throttle valve 10 and (n-1)th grade of throttling
Valve inlet is connected；N-th grade of 17 working medium side outlet of condenser is connected with n-th grade of 20 entrance of bypass throttle valve, n-th grade of bypass throttle valve
20 outlets are connected with n-th grade of 18 two-phase fluid side entrance of regenerator, n-th grade of 18 two-phase fluid side outlet of regenerator and (n-1)th grade
The valve inlet that throttles is connected；
Normal-temperature water outlet is connected with 4 heat exchanging fluid side entrance of first order condenser, and 4 heat exchanging fluid side of first order condenser goes out
Mouth is connected with 9 heat exchanging fluid side entrance of second level condenser, 9 heat exchanging fluid side outlet of second level condenser and third level condenser
Heat exchanging fluid side entrance is connected, 15 heat exchanging fluid side outlet of i-stage condenser and i+1 grade condenser heat exchanging fluid side entrance phase
Even, (n-1)th grade of condenser heat exchanging fluid side entrance is connected with n-th grade of 17 heat exchanging fluid side entrance of condenser, n-th grade of condenser 17
Heat exchanging fluid side outlet is connected with high temperature hot water or high-temperature steam entrance.
The working medium used uses pure refrigerant, or uses CO2/R1234ze(E)、CO2/R1234ze(Z)、CO2/
R1234yf、R41/R1234ze(E)、R41/R1234ze(Z)、R41/R1234yf、R32/R1234ze(E)、R32/R1234ze
(Z), the non-azeotropic mixed working mediums such as R32/R1234yf.For non-azeotropic mixed working medium, temperature glide and evaporator heat exchange stream are matched
Body imports and exports the comparable refrigerant of the temperature difference.
The not exclusively cooling moderate and high temperature heat system of throttling, can be set as more according to process requirements among the more condensers of multi-stage compression
Grade (n grades of abbreviation), temperature rise is higher, and setting series is more.
Series determines principle are as follows: to guarantee that evaporator and condenser heat transfer process match simultaneously, according to the technological requirements to normal
The temperature rise of warm water heating and the temperature drop of heat source heat exchanging fluid calculate (the normal-temperature water heating temperature rise/cooling temperature of heat source heat exchanging fluid
Drop), it is rounded the series as system.
Present system can also be by each temperature grade condenser and Ge Wen grades of regenerator parallel connections heating hot water heating pipelines, application
For incomplete two co-feeding system of chiller-heat pump that throttles among the more condensers of multi-stage compression.Heat supply end can configure fan coil,
The devices such as coil pipe, radiator, condensers at different levels and regenerator at different levels directly provide heat for it, are used for rooms, realize heat
Measure cascade utilization.
Compared with prior art, the advantages and positive effects of the present invention are:
(1) compared with conventional pure matter single stage compress heat pump system, normal-temperature water continuously adds in multi-stage condensing device in the present invention
Heat, temperature rise of the water in condensers at different levels is lower, and each potential temperature condensation process of refrigerant forms good with normal-temperature water heating process
Temperature Matching can significantly reduce the heat transfer temperature difference of heat exchanging fluid and working medium, and the heat exchange between reduction heat exchanging fluid and refrigerant is not
Reversible loss,Efficiency improves, and effectively promotes the COP of circulation；
(2) for the conventional single stage compression heat pump system using non-azeotropic working medium, working medium is difficult to full in evaporator, condenser
It is matched while foot is with heat exchanging fluid temperature.Compared with conventional non-azeotropic working medium single stage compress heat pump system, normal-temperature water of the present invention
Heating process by continuous warming twice and more than twice, the temperature rise of each heating process is not high, with non-azeotropic refrigerant
Evaporation process and the condensation process of each potential temperature form good Temperature Matching.Through the invention, it can be achieved that evaporator and condenser
Two side liquids match simultaneously, and heat exchange irreversible loss greatly reduces, and further increase systemEfficiency and efficiency improve economic effect
Benefit；
(3) displacement of the more compressor of the second level is fewer, and the inspiratory capacity of compressor reduces, relatively same normal-temperature water temperature rise
Under the conditions of single-stage heat pump system, the power consumption of compressor of the present invention significantly reduces；
(4) opposite traditional single stage is compressed, and the pressure ratio of multi-stage compression process reduces, and compressor isentropic efficiency improves.Furthermore originally
The intermediate throttling process of invention device setting is crossed hot gas to compressor outlet and is cooled down, and delivery temperature reduces, and extending compressor makes
Use the service life；
(5) present apparatus can be used to heat simultaneously, production and living hot water and industrial high temperature hot water and high steam etc..With
Way extensively, has good development prospect.
Detailed description of the invention
Fig. 1 is the not exclusively cooling moderate and high temperature heat system diagram of throttling among Two-stage Compression double-condenser；
Fig. 2 is that the pure matter of twin-stage compresses the not exclusively cooling moderate and high temperature heat system Sweet service of throttling among double-condenser；
Fig. 3 is that twin-stage non-azeotropic working medium compresses the not exclusively cooling moderate and high temperature heat system Wen Han of throttling among double-condenser
Figure；
Fig. 4 is the incomplete two co-feeding system figure of chiller-heat pump that throttles among Two-stage Compression double-condenser；
Fig. 5 is the not exclusively cooling moderate and high temperature heat system diagram of throttling among multi-stage compression multi-stage condensing device.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
Embodiment one: the not exclusively cooling moderate and high temperature heat system of throttling among Two-stage Compression double-condenser
This system is made of first order heat pump cycle and second level heat pump cycle and normal-temperature water laser heating process, system
As shown in Figure 1.
(1) if system uses pure refrigerant, the not exclusively cooling high temperature heat of throttling among the pure matter compression double-condenser of twin-stage
Pumping system Sweet service is as shown in Figure 2.Specific embodiment is as follows:
Step 1: first order compressor 3 sucks working medium (such as Fig. 2 state of the low-temp low-pressure in 2 working medium side exit of evaporator
1) overheated gas (such as Fig. 2 state 2) of medium temperature and medium pressure, is compressed it into, hot gas is crossed later and is divided into two-way.Gas flows into all the way
4 working medium side entrance of first-stage condenser, working medium is condensed to saturated solution (such as Fig. 2 state 10) in condenser, and by normal-temperature water (such as Fig. 2
State w1) it is heated to certain temperature (such as Fig. 2 state w2).Working medium enters 5 reducing pressure by regulating flow of first order throttle valve to two phase flow later
Body state (such as Fig. 2 state 12), gas-liquid two-phase fluid enter 2 working medium side entrance of evaporator, and working medium evaporation absorbs normal-temperature water heat
After become be saturated gaseous state (such as Fig. 2 state 1), sucked by first order compressor 3.
Fig. 2 shape is cooled to step 2: flowing into regenerator 6 from the another way overheated gas flowed out in first order compressor 3
State 3, enters high stage compressor 8 later, and working medium is compressed to high-temperature, high pressure fluid (such as Fig. 2 state 4), then flows into the second level
9 working medium side entrance of condenser, working medium and the heat exchanging fluid (hot water or steam) flowed out from first order condenser heat exchanging fluid side
(such as Fig. 2 state w2 and w3, w2 and w3 are same state) exchanges heat, and temperature is reduced to Fig. 2 state 6, and heat exchanging fluid is by into one
Step is heated to Fig. 2 state w4.
Step 3: the working medium that second level condenser 9 flows out is also classified into two-way, 7 section of second level bypass throttle valve is flowed through all the way
Stream decompression, becomes gas-liquid two-phase fluid state (such as Fig. 2 state 7).Gas-liquid two-phase fluid after reducing pressure by regulating flow with from first order pressure
The high-temperature gas flowed out in contracting machine 3 exchanges heat in regenerator 6, and first order compressor exhaust temperature is reduced to Fig. 2 state 3, gas-liquid
Two-phase fluid heat absorption is evaporated to saturation gaseous state such as Fig. 2 state 8.The another way working medium that second level condenser 9 flows out flows through the second level
10 reducing pressure by regulating flow of throttle valve becomes gas-liquid two-phase state (such as Fig. 2 state 7).The saturated air of 6 working medium side outlet of regenerator and throttling
The gas-liquid two-phase fluid that valve 10 exports is mixed to Fig. 2 state 9, then and from 4 working medium side of first order condenser outlet outflow
Pressure fluid (such as Fig. 2 state 10) three fluid streams are mixed to Fig. 2 state 11, are flowed through first order throttle valve 5 and are further throttled extremely
Enter 2 working medium side entrance of evaporator after Fig. 2 state 12, working medium heat absorption becomes being saturated gaseous state (such as Fig. 2 state 1), by first order pressure
Contracting machine 1 sucks, and completes heat pump cycle.
Step 4: normal-temperature water (such as Fig. 2 state w1) flows into 4 heat exchanging fluid side of first order condenser first is heated to Fig. 2
State w2 (w3) then flows into the heat exchanging fluid side entrance second level condenser 9 (such as Fig. 2 state w3), is heated to be needed for technique
Temperature (such as Fig. 2 state w4) obtains required high temperature hot water or high-temperature steam, completes normal-temperature water laser heating process.
(2) according to non-azeotropic mixed working medium, the not exclusively cooling high temperature heat of Two-stage Compression double-condenser centre throttling
The refrigerant of pumping system and the matching properties of normal-temperature water heating process can be more excellent, can further lifting system efficiency, improve
Economic benefit.Its twin-stage non-azeotropic working medium compresses the not exclusively cooling moderate and high temperature heat system Sweet service of throttling among double-condenser such as
Shown in Fig. 3.
Specific embodiment is as follows:
Step 1: first order compressor 3 sucks working medium (such as Fig. 3 state of the low-temp low-pressure in 2 working medium side exit of evaporator
1) gas (such as Fig. 3 state 2) of heat is pressed through in, compressing it into, gas is divided into two-way later.First order condenser is flowed into all the way
4 working medium side entrances, working medium is condensed to saturated solution (such as Fig. 3 state 11) in condenser, and by the normal-temperature water of heat exchanging fluid side (as schemed
3 state w1) it is heated to certain temperature (such as Fig. 3 state w2).Working medium enters 5 reducing pressure by regulating flow of first order throttle valve to two phase flow later
Body state (such as Fig. 3 state 12), gas-liquid two-phase fluid enter 2 working medium side entrance of evaporator, and working medium becomes after absorbing normal-temperature water heat
To be saturated gaseous state (such as Fig. 3 state 1), sucked by first order compressor 3.
Step 2: the another way gas flowed out from first order compressor 3, which flows into the overheat of regenerator 6 gas side, is cooled to Fig. 3
State 3 enters high stage compressor 8 later, and working medium is compressed to high-temperature, high pressure fluid (such as Fig. 3 state 4), and it is cold to flow into the second level
9 working medium side entrance of condenser, with heat exchanging fluid (such as Fig. 3 state w2 and w3, w2 flowed out from 4 heat exchanging fluid side of first order condenser
It is same state with w3) it exchanges heat, temperature is reduced to Fig. 3 state 6, and heat exchanging fluid is further heated to Fig. 3 state w4.
Step 3: the working medium that second level condenser 9 flows out is also classified into two-way, 7 section of second level bypass throttle valve is flowed through all the way
Stream decompression, becomes gas-liquid two-phase fluid state (such as Fig. 3 state 7).Gas-liquid two-phase fluid after reducing pressure by regulating flow with from first order pressure
The high temperature refrigerant flowed out in contracting machine 1 exchanges heat in regenerator 6, and first order compressor exhaust temperature is reduced to Fig. 3 state 3,
Gas-liquid two-phase fluid heat absorption is evaporated to saturation gaseous state (such as Fig. 3 state 10).The another way working medium stream flowed out from second level condenser 9
Through 10 reducing pressure by regulating flow of second level throttle valve, become gas-liquid two-phase state (such as Fig. 3 state 7).The saturation of 6 working medium side outlet of regenerator
Gas 7 mixes with the gas-liquid two-phase fluid 10 that throttle valve 10 exports to Fig. 3 state 9, then with flowed out from first order condenser 4
Three fluid streams of middle pressure working medium (such as Fig. 3 state 11) are mixed to Fig. 3 state 8, are flowed through first order throttle valve 5 and are further throttled extremely
Fig. 3 state 12 enters evaporator 2 and is sucked after heat absorption evaporation (such as Fig. 3 state 1) by first order compressor 3, completes heat pump cycle.
Step 4: normal-temperature water (such as Fig. 3 state w1), which first flows into 4 heat exchanging fluid side of first order condenser, is heated to Fig. 3 shape
State w2 (w3) then flows into 9 heat exchanging fluid side of second level condenser and continues to heat (such as Fig. 3 state w4), is heated continuously into
High-temperature obtains high temperature hot water or high-temperature steam needed for technique, completes normal-temperature water laser heating process.
Embodiment two: the heating hot water heating pipeline in parallel between condenser and regenerator forms Two-stage Compression double-condenser
Incomplete two co-feeding system of chiller-heat pump of centre throttling, system are as shown in Figure 4.
Heat supply end 11 can configure fan coil, the heat supplies end such as coil pipe, radiator, 11 exit room temperature of heat supply end
Heat exchanging fluid enters 4 heat exchanging fluid side of first order condenser, is heated to certain temperature for the first time, then flows into regenerator 6 and changes
Hot-fluid side, the return water of heat supply end exchange heat with the high temperature refrigerant flowed out from first order compressor 3, first order compressor 3
Delivery temperature reduces, and the return water of heat supply end is further heated, and is used for rooms, realizes heat cascade utilization, reduces heat
The loss of amount.
Embodiment three: the not exclusively cooling moderate and high temperature heat system of throttling among more condensers that three-level or more is compressed.
It is not exclusively cooling that the present apparatus can also need to be designed as according to specific implementation throttling among multi-stage compression multi-stage condensing device
Moderate and high temperature heat system, realization repeatedly heats normal-temperature water, to produce the hot water or steam of higher temperature, so as to preferably
Adapt to different process necessary requirement.Not exclusively cooling moderate and high temperature heat system such as Fig. 5 of throttling among multi-stage compression multi-stage condensing device.
Specific embodiment is as follows:
Step 1: first order compressor 3 sucks the working medium of the low-temp low-pressure in 2 working medium side exit of evaporator, compress it
At the overheated gas of intermediate pressure, it is divided into two-way later.Overheating air flow enters 4 working medium side of first order condenser all the way, in condenser
Working medium condensation, and normal-temperature water is heated to certain temperature.Working medium enters 5 reducing pressure by regulating flow of first order throttle valve later, subsequently into
2 working medium side of evaporator is sucked after working medium heat absorption evaporation by first order compressor 3.
Step 2: to be introduced into 6 working medium side of second level regenerator cold for the another way working medium flowed out from first order compressor 3
But, enter high stage compressor 8 later, boil down to crosses hot gas, and the fluid that high stage compressor 8 flows out is divided into two-way, wherein one
Road flows into 9 working medium side of second level condenser, exchanges heat with the normal-temperature water flowed out from 4 heat exchanging fluid side of first order condenser, often
Warm water is further heated.Normal-temperature water after heating enters third level condenser heat exchanging fluid side.From 9 working medium of second level condenser
The fluid of side outflow is mixed with the gas-liquid two-phase fluid from the third level, is divided into two-way later.Second level bypass tool is flowed through all the way
7 reducing pressure by regulating flow of valve is flowed, gas-liquid two-phase state is become.Gas-liquid two-phase fluid after reducing pressure by regulating flow is flowed with from first order compressor 3
Hot gas of crossing out exchanges heat in second level regenerator 6, and first order compressor exhaust temperature reduces, gas-liquid two-phase fluid heat absorption
It is evaporated to saturation gaseous state.The another way working medium flowed out from second level condenser 9 flows through 11 reducing pressure by regulating flow of second level throttle valve, becomes
Gas-liquid two-phase state.After the above two-way fluid is mixed with from the fluid flowed out in 4 working medium side of first order condenser, is flowed through
Level-one throttle valve 5 throttles.The another way fluid flowed out from high stage compressor 8 enters third level compressor.
Step 3: the structure type that system is recycled since 3rd level to (n-1)th grade is identical, to simplify narration, for the 3rd
Grade is indicated with i-stage to (n-1)th grade.The another way working medium flowed out from (i-1)-th grade of compressor is introduced into i-stage regenerator 12
Heat exchanging fluid side is cooling, enters i-stage compressor 13 later, and boil down to crosses hot gas, and what is flowed out from i-stage compressor 13 crosses hot gas
It is divided into two-way, wherein flowing into 15 working medium side of i-stage condenser all the way, is changed with what is flowed out from (i-1)-th grade of condenser heat exchanging fluid side
Hot fluid exchanges heat, and heat exchanging fluid is further heated, and the normal-temperature water after heating enters i+1 grade condenser heat exchanging fluid
Side.The fluid flowed out from 15 working medium side of i-stage condenser is mixed with the gas-liquid two-phase fluid from i+1 grade, is divided into two later
Road.14 reducing pressure by regulating flow of i-stage bypass throttle valve is flowed through all the way, becomes gas-liquid two-phase state.Biphase gas and liquid flow after reducing pressure by regulating flow
Body exchanges heat in i-stage regenerator 12 with the hot gas of crossing flowed out from (i-1)-th grade of compressor, (i-1)-th grade of compressor air-discharging temperature
Degree reduces, and gas-liquid two-phase fluid heat absorption is evaporated to saturation gaseous state.The another way working medium stream flowed out from 15 working medium side of i-stage condenser
Through 16 reducing pressure by regulating flow of i-stage throttle valve, become gas-liquid two-phase state.The above two-way fluid with from (i-1)-th grade of condenser working medium side
After the fluid of outflow is mixed, (i-1)-th grade of throttle valve throttling is flowed through.From i-stage compressor 13 flow out another way fluid into
Enter i+1 grade compressor to be compressed.
Step 4: the another way fluid of (n-1)th grade of compressor outflow enters n-th grade of 18 working medium side of regenerator cooling, later
Into n-th grade of compressor 19, it was collapsed into hot gas, the overheating air flow of n-th grade of compressor 19 outflow enters n-th grade of 17 work of condenser
Matter side exchanges heat with the heat exchanging fluid flowed out from (n-1)th grade of condenser heat exchanging fluid side, and heat exchanging fluid is added by last time
Heat.
Step 5: the fluid of n-th grade of 17 working medium side of condenser outflow is divided into two-way, n-th grade of bypass throttle valve is flowed through all the way
20 reducing pressure by regulating flow, become gas-liquid two-phase state.Gas-liquid two-phase fluid after reducing pressure by regulating flow with flowed out from (n-1)th grade of compressor
It crosses hot gas to exchange heat in n-th grade of regenerator 18, (n-1)th grade of compressor exhaust temperature reduces, and gas-liquid two-phase fluid heat absorption is steamed
Hair is saturation gaseous state.The another way working medium flowed out from n-th grade of 17 working medium side of condenser flows through n-th grade of 10 reducing pressure by regulating flow of throttle valve,
Become gas-liquid two-phase state.After the above two-way fluid mixing, throttle into (n-1)th grade of throttle valve.
Step 6: normal-temperature water successively flows into condensers at different levels, it is heated continuously to high temperature degree, from n-th grade of condenser
The outflow of 17 heat exchanging fluid sides, obtains high temperature hot water or high-temperature steam needed for technique, completes normal-temperature water laser heating process.
Although the preferred embodiment of the present invention is described above in conjunction with attached drawing, the invention is not limited to upper
The specific embodiment stated, the above mentioned embodiment is only schematical, be not it is restrictive, this field it is common
Technical staff under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, may be used also
By make it is many in the form of, within these are all belonged to the scope of protection of the present invention.
Claims (2)
1. the not exclusively cooling moderate and high temperature heat system of throttling among a kind of more condensers of multi-stage compression, which is characterized in that the system
3≤i≤n-1, n >=4 in system；
First order compressor (3) outlet is connected with first order condenser (4) working medium side entrance, first order compressor (3) working medium side
Outlet is connected with second level regenerator (6) overheat gas side entrance, and second level regenerator (6) overheats gas side outlet and compresses with the second level
Machine (8) is connected, and first order condenser (4) working medium side outlet is connected with first order throttle valve (5) entrance, second level throttle valve (11)
Outlet is connected with first order throttle valve (5) entrance, second level regenerator (6) two-phase fluid side outlet and first order throttle valve (5)
Entrance is connected, and first order throttle valve (5) outlet is connected with evaporator (1) working medium side entrance, evaporator (1) working medium side outlet and the
Stage compressor (3) entrance is connected；Second level condenser (9) working medium side outlet passes through setting second level bypass throttle valve (7)
Piping connection second level regenerator (6)；
(i-1)-th stage compressor outlet is connected with i-stage regenerator (12) overheat gas side entrance, and i-stage regenerator (12) crosses hot gas
Side outlet is connected with i-stage compressor (13) entrance, and i-stage compressor (13) outlet enters with i+1 grade regenerator overheat gas side
Mouth is connected, and i-stage compressor (13) outlet is connected with i-stage condenser (15) working medium side entrance, i-stage condenser (15) working medium
Side outlet is connect with i-stage throttle valve (16) entrance, and i+1 grade throttling valve outlet is connected with i-stage throttle valve (16) entrance, the
I+1 grades of regenerator two-phase fluid side outlets are connected with i-stage throttle valve (16) entrance, i-stage throttle valve (16) outlet and (i-1)-th
Grade throttling valve inlet is connected；I-stage condenser (15) working medium side outlet is connected with i-stage bypass throttle valve (14) entrance, i-stage
Bypass throttle valve (14) outlet is connected with i-stage regenerator (12) two-phase fluid side entrance, i-stage regenerator (12) two-phase fluid
Side outlet is connected with (i-1)-th grade of throttling valve inlet；
(n-1)th stage compressor outlet is connected with n-th grade of regenerator (18) overheat gas side entrance, and n-th grade of regenerator (18) crosses hot gas
Side outlet is connected with n-th grade of compressor (19) entrance, and n-th grade of compressor (19) outlet enters with n-th grade of condenser (17) working medium side
Mouth is connected, and n-th grade of condenser (17) working medium side outlet is connect with n-th grade of throttle valve (10) entrance, n-th grade of throttle valve (10) outlet
It is connected with (n-1)th grade of throttling valve inlet；N-th grade of condenser (17) working medium side outlet and n-th grade of bypass throttle valve (20) entrance phase
Even, n-th grade of bypass throttle valve (20) outlet is connected with n-th grade of regenerator (18) two-phase fluid side entrance, n-th grade of regenerator (18)
Two-phase fluid side outlet is connected with (n-1)th grade of throttling valve inlet；
Normal-temperature water outlet is connected with first order condenser (4) heat exchanging fluid side entrance, and first order condenser (4) heat exchanging fluid side goes out
Mouth is connected with second level condenser (9) heat exchanging fluid side entrance, and second level condenser (9) heat exchanging fluid side outlet and the third level are cold
Condenser heat exchanging fluid side entrance is connected, i-stage condenser (15) heat exchanging fluid side outlet and i+1 grade condenser heat exchanging fluid side
Entrance is connected, and (n-1)th grade of condenser heat exchanging fluid side entrance is connected with n-th grade of condenser (17) heat exchanging fluid side entrance, and n-th grade
Condenser (17) heat exchanging fluid side outlet is connected with high temperature hot water or high-temperature steam entrance.
2. the not exclusively cooling moderate and high temperature heat system of throttling among the more condensers of multi-stage compression according to claim 1,
It is characterized in that, the working medium used uses pure refrigerant, or uses CO2/R1234zeE、CO2/R1234zeZ、CO2/R1234yf、
R41/R1234zeE, R41/R1234zeZ, R41/R1234yf, R32/R1234zeE, R32/R1234zeZ, R32/R1234yf are non-
Azeotropic mixed working medium.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910834768.1A CN110486943A (en) | 2019-09-05 | 2019-09-05 | The not exclusively cooling moderate and high temperature heat system of throttling among the more condensers of multi-stage compression |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910834768.1A CN110486943A (en) | 2019-09-05 | 2019-09-05 | The not exclusively cooling moderate and high temperature heat system of throttling among the more condensers of multi-stage compression |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115264977A (en) * | 2022-07-29 | 2022-11-01 | 哈尔滨工业大学 | High-temperature water working medium heat pump circulating system with intermediate multi-stage cooling in compression process |
-
2019
- 2019-09-05 CN CN201910834768.1A patent/CN110486943A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115264977A (en) * | 2022-07-29 | 2022-11-01 | 哈尔滨工业大学 | High-temperature water working medium heat pump circulating system with intermediate multi-stage cooling in compression process |
| CN115264977B (en) * | 2022-07-29 | 2024-03-29 | 哈尔滨工业大学 | Intermediate multistage cooling high-temperature water working medium heat pump circulating system in compression process |
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