CN106813429A - The refrigerating capacity computational methods and device of a kind of vertical separation container - Google Patents
The refrigerating capacity computational methods and device of a kind of vertical separation container Download PDFInfo
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- CN106813429A CN106813429A CN201611269163.5A CN201611269163A CN106813429A CN 106813429 A CN106813429 A CN 106813429A CN 201611269163 A CN201611269163 A CN 201611269163A CN 106813429 A CN106813429 A CN 106813429A
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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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
- F25B2600/00—Control issues
- F25B2600/05—Refrigerant levels
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Abstract
The present embodiments relate to processing technology field of freezing, the refrigerating capacity computational methods and device of a kind of vertical separation container are disclosed, the method includes：The thermodynamics basic parameter of refrigerant is obtained, thermodynamics basic parameter includes the Saturated vapor density of the Saturate liquid density, the liquid-drop diameter of refrigerant and refrigerant of refrigerant；According to thermodynamics basic parameter, separating rate when refrigerant liquid is separated with refrigerant gas in vertical separation container model machine is obtained；According to separating rate, the universal calculation equation of the refrigerating capacity of vertical separation container model machine is obtained；Based on universal calculation equation, the refrigerating capacity of the vertical separation container of target in refrigeration system is calculated.The embodiment of the present invention is applied to vertical separation container, can quickly and easily calculate the refrigerating capacity of vertical separation container, and the accuracy of the refrigerating capacity being calculated is also higher.
Description
Technical field
The present invention relates to processing technology field of freezing, and in particular to a kind of refrigerating capacity computational methods of vertical separation container and
Device.
Background technology
Refrigeration system is widely developed in industry-by-industry, such as food-processing industry, chemical industry, agriculture and animal husbandry industry
Deng.Design refrigeration system at the beginning of, it is necessary in completing refrigeration system various containers type selection calculation.Wherein, domestic refrigeration system
Middle compressor, evaporator, condenser are all that their refrigerating capacity and heat removal capacity is represented using refrigerating capacity, and refrigerating capacity
It is determined that needing to be determined according to duty parameters such as different refrigerants, heat supply temperature, evaporating temperature, condensation temperatures, but separate
Container (including gas-liquid separator, intercooler, low pressure recycle bucket flash type economizer etc.), does not make this table also but
Show mode.Separation container is divided according to profile, including vertical separation container and horizontal separation container.
In practice, it has been found that although above-mentioned duty parameter is also used in refrigeration system at home to determine refrigerating capacity,
It is not make specific universal calculation equation but, constant current journey is comparatively laborious really to cause refrigerating capacity, and accuracy is than relatively low,
So that the refrigerant system design of the country does not integrate with International Design.It can be seen that, at home in refrigeration system industry, need badly and develop
The representation of refrigerating capacity.
The content of the invention
The embodiment of the invention discloses the refrigerating capacity computational methods and device of a kind of vertical separation container, can be simple and quick
Calculate the refrigerating capacity of vertical separation container, accuracy is higher.
First aspect present invention discloses a kind of refrigerating capacity computational methods of vertical separation container, it may include：
The thermodynamics basic parameter of refrigerant is obtained, the thermodynamics basic parameter includes the saturated liquid of the refrigerant
The Saturated vapor density of density, the liquid-drop diameter of the refrigerant and the refrigerant；
According to the thermodynamics basic parameter, acquisition refrigerant liquid is with refrigerant gas in vertical separation container model machine
Separating rate V during separationt；
According to the separating rate Vt, obtain the universal calculation equation of the refrigerating capacity of the vertical separation container model machine；
Based on the universal calculation equation, the refrigerating capacity of the vertical separation container of target in refrigeration system is calculated.
It is described according to the thermodynamics basic parameter in first aspect present invention as a kind of optional implementation method,
Obtain separating rate V when refrigerant liquid is separated with refrigerant gas in vertical separation container model machinetIncluding：
Saturated vapor density, the liquid-drop diameter of the refrigerant and the separating rate V according to the refrigerantt, obtain
The buoyancy in the vertical separation container model machine must be acted on；
And, Saturate liquid density, the Saturated vapor density of the refrigerant and the refrigeration according to the refrigerant
The liquid-drop diameter of agent, calculates the gravity of the drop of the refrigerant；
According to the buoyancy and the gravity, obtain the refrigerant liquid and separate appearance vertical with the refrigerant gas
Separating rate V when being separated in device model machinet。
It is described according to the separating rate V in first aspect present invention as a kind of optional implementation methodt, obtain
The universal calculation equation of the refrigerating capacity of the vertical separation container model machine includes：
Obtain the sectional area of the vertical separation container model machine；
And, obtain unit mass flow of the refrigerant in the vertical separation container model machine；
According to the separating rate, the sectional area and the unit mass flow of the vertical separation container model machine, obtain
The universal calculation equation of the refrigerating capacity of the vertical separation container model machine.
As a kind of optional implementation method, in first aspect present invention, the separating rate VtGeneral-purpose computations it is public
Formula is：
Wherein, the ρfIt is the Saturate liquid density of the refrigerant liquid, the ρvIt is the saturation of the refrigerant gas
Gas density, the CDIt is resistance coefficient, the g is acceleration of gravity, and the d is the liquid-drop diameter of the refrigerant liquid.
Used as a kind of optional implementation method, in first aspect present invention, the universal calculation equation of the refrigerating capacity is：
MRefrigerating capacity=((Vt×S0)÷MUnit mass flow)×k；
Wherein, the S0It is the sectional area of the vertical separation container, the MUnit mass flowIt is the vertical separation container
Refrigerant unit mass flow at the working temperature, the k is safety coefficient.
Used as a kind of optional implementation method, in first aspect present invention, the refrigerant is ammonia or freon；When
The refrigerant of the vertical separation container is ammonia, and the value of the safety coefficient k is the first preset value；When the vertical separation container
Refrigerant be freon, the value of the safety coefficient k is the second preset value；Wherein, second preset value is different from described
First preset value.
As a kind of optional implementation method, in first aspect present invention, the operating temperature include evaporating temperature,
And/or condensation temperature, and/or heat supply temperature.
Second aspect present invention discloses a kind of refrigeration device for calculating of vertical separation container, it may include：
Modeling unit, for obtaining thermodynamics basic parameter of the refrigerant under saturation temperature, the thermodynamics is joined substantially
Number includes that the saturated gas of the Saturate liquid density, the liquid-drop diameter of the refrigerant and the refrigerant of the refrigerant is close
Degree；According to the thermodynamics basic parameter, obtain refrigerant liquid and separated in vertical separation container model machine with refrigerant gas
When separating rate；According to the separating rate, the universal calculation equation of the vertical separation container model machine is obtained；
Refrigerating capacity computing unit, for the universal calculation equation obtained based on the modeling unit, calculates refrigeration
The refrigerating capacity of the vertical separation container of target in system.
Used as a kind of optional implementation method, in second aspect present invention, the modeling unit is according to the thermodynamics
Basic parameter, obtains the specific of separating rate of refrigerant liquid when being separated in vertical separation container model machine with refrigerant gas
Implementation includes：
Saturated vapor density, the liquid-drop diameter of the refrigerant and the separating rate according to the refrigerant, obtain
Act on the buoyancy in the vertical separation container model machine；And, Saturate liquid density, the refrigeration according to the refrigerant
The liquid-drop diameter of the Saturated vapor density of agent and the refrigerant, calculates the gravity of the drop of the refrigerant；According to described floating
Power and the gravity, obtain the dividing when refrigerant liquid is separated with the refrigerant gas in vertical separation container model machine
From speed.
Used as a kind of optional implementation method, in second aspect present invention, the modeling unit separates speed according to described
Degree, the specific implementation for obtaining the universal calculation equation of the refrigerating capacity of the vertical separation container model machine includes：
Obtain the sectional area of the vertical separation container model machine；And, obtain the refrigerant and hold in vertical the separation
Unit mass flow in device model machine；According to the separating rate, the sectional area and the list of the vertical separation container model machine
Position mass flow, obtains the universal calculation equation of the refrigerating capacity of the vertical separation container model machine.
As a kind of optional implementation method, in second aspect present invention, the separating rate VtFor：
Wherein, the ρfIt is the Saturate liquid density of the refrigerant liquid, the ρvIt is the saturation of the refrigerant gas
Gas density, the CDIt is resistance coefficient, the g is acceleration of gravity, and the d is the liquid-drop diameter of the refrigerant liquid.
Used as a kind of optional implementation method, in second aspect present invention, the universal calculation equation of the refrigerating capacity is：
MRefrigerating capacity=((Vt×S0)÷MUnit mass flow)×k；
Wherein, the MRefrigerating capacityIt is the refrigerating capacity in the vertical separation container, the VtIt is the separating rate, the S0
It is the sectional area of the vertical separation container, the MUnit mass flowFor the vertical separation container refrigerant at the working temperature
Unit mass flow, the k be safety coefficient.
Used as a kind of optional implementation method, in second aspect present invention, the refrigerant is ammonia or freon；When
The refrigerant of the vertical separation container is ammonia, and the value of the safety coefficient k is the first preset value；When the vertical separation container
Refrigerant be freon, the value of the safety coefficient k is the second preset value；Wherein, second preset value is different from described
First preset value.
As a kind of optional implementation method, in second aspect present invention, the operating temperature include evaporating temperature,
And/or condensation temperature, and/or heat supply temperature.
Compared with prior art, the embodiment of the present invention has the advantages that：
In embodiments of the present invention, thermodynamics basic parameter of the refrigerant under saturation temperature, the thermodynamics base are first obtained
This parameter includes Saturate liquid density of the refrigerant under saturation temperature, the liquid-drop diameter of refrigerant and refrigerant in saturation temperature
Under Saturated vapor density；Then according to thermodynamics basic parameter, obtain refrigerant liquid and separated vertical with refrigerant gas
Separating rate when being separated in container model machine；Finally according to separating rate, obtain vertical separation container model machine refrigerating capacity it is logical
Use computing formula.After universal calculation equation is obtained, the universal calculation equation can be based on and calculate any vertical in refrigeration system
The refrigerating capacity of formula separation container (the vertical separation container of target).As can be seen that obtain vertical separation by the embodiment of the present invention holding
The universal calculation equation of device refrigerating capacity, then can quickly and easily calculate refrigerating capacity using the universal calculation equation afterwards, fit
For all vertical separation containers, and the accuracy of the refrigerating capacity being calculated is also higher.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below by to be used needed for embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ability
For the those of ordinary skill of domain, on the premise of not paying creative work, can also obtain other attached according to these accompanying drawings
Figure.
Fig. 1 is the schematic flow sheet of the refrigerating capacity computational methods of vertical separation container disclosed in the embodiment of the present invention；
Fig. 2 is the structural representation of the refrigeration device for calculating of vertical separation container disclosed in the embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example is applied, the scope of protection of the invention is belonged to.
The embodiment of the invention discloses a kind of refrigerating capacity computational methods of vertical separation container, can quickly and easily calculate
Go out the refrigerating capacity of vertical separation container, accuracy is higher.The embodiment of the present invention also accordingly discloses a kind of vertical separation container
Energy balane device.
At the beginning of refrigerant system design, it usually needs complete the type selecting to various containers in refrigeration system.In type selecting one
Individual vital task is to determine out the refrigerating capacity of container and system matches.The embodiment of the present invention is mainly used in research and development and formulates vertical separation
The universal calculation equation of the refrigerating capacity of container, during for refrigeration system type selecting, quickly and accurately calculates vertical separation container
Refrigerating capacity.
Embodiment one
Fig. 1 is referred to, Fig. 1 shows for the flow of the refrigerating capacity computational methods of vertical separation container disclosed in the embodiment of the present invention
It is intended to；As shown in figure 1, a kind of refrigerating capacity computational methods of vertical separation container may include：
101st, thermodynamics basic parameter of the refrigerant under saturation temperature is obtained, the thermodynamics basic parameter includes refrigerant
Saturate liquid density, the liquid-drop diameter of refrigerant and refrigerant Saturated vapor density；
In the computation of refrigeration system, the thermodynamics basic parameter of refrigerant, thermodynamics basic parameter are often used
Can generally be obtained from the thermal performance table search of refrigerant.Wherein, thermodynamics basic parameter includes the saturated liquid of refrigerant
Liquid-drop diameter of density, the Saturated vapor density of refrigerant and refrigerant etc..Wherein, Saturate liquid density is refrigerant can
Corresponding density during saturation temperature as liquid, the Saturated vapor density of refrigerant is that refrigerant can turn into the full of gas
Corresponding density during with temperature, it will be understood that the corresponding saturation temperature of saturated liquid of refrigerant is corresponding with saturated gas full
It is different with temperature.
102nd, according to thermodynamics basic parameter, acquisition refrigerant liquid is with refrigerant gas in vertical separation container model machine
Separating rate V during separationt；
Used as a kind of optional implementation method, step specific 102 includes：Saturated vapor density and separation according to refrigerant
Speed Vt, obtain the buoyancy acted in vertical separation container model machine；And, Saturate liquid density, refrigeration according to refrigerant
The liquid-drop diameter of agent, calculates the gravity of the drop of refrigerant；According to buoyancy and the gravity, refrigerant liquid and refrigerant are obtained
Separating rate V when gas is separated in vertical separation container model machinet.Thermodynamics basic parameter includes：Refrigerant liquid is full
The drop of the Saturated vapor density and refrigerant liquid of Saturate liquid density, refrigerant gas with a temperature of under saturation temperature
Diameter.
Below in conjunction with the derivation of the universal calculation equation of the principle Analysis refrigerating capacity of vertical separation container：It is vertical
There are two states in the refrigerant in formula separation container：Respectively refrigerant liquid (refrigerant of liquid) and refrigerant gas
(gaseous refrigerant).The Main Function of vertical separation container is refrigerant gas of the treatment containing a small amount of lime set, that is, will
Refrigerant liquid is separated from refrigerant gas, and most of vertical separation container separates refrigerant liquid and refrigerant gas
Rely primarily on Action of Gravity Field, that is, the movement of falling object for depending on refrigerant liquid.It can be seen that, hold to calculate vertical separation
Refrigerating capacity in device is, it is necessary to know the relative velocity that refrigerant liquid falls from refrigerant gas, the relative velocity is refrigerant
The separating rate that liquid is separated from refrigerant gas, and vertical separation container sectional area and at the working temperature
The unit mass flow of refrigerant.The unit mass flow of refrigerant at the working temperature can be according to operating temperature from existing
Searched in data and obtained, the sectional area of vertical separation container can also be calculated according to its diameter, therefore, calculate vertical separation
The refrigerating capacity of container only needs to calculate the separating rate that refrigerant liquid is separated from refrigerant gas.It is optional
Ground, operating temperature here includes evaporating temperature, and/or condensation temperature, and/or heat supply temperature.It is to be appreciated that evaporating temperature,
Condensation temperature and feed flow temperature can be with different, or any 2 two identical, or 3 all sames.
The operation principle of vertical separation container will be analyzed below：
Refrigerant liquid is primarily present three kinds of power in refrigerant gas stream：Include gravity, buoyancy and resistance respectively, this three
Planting the synthesis of power will obtain the direction of resulting net force (with joint efforts).When the resistance in vertical separation container and buoyancy make a concerted effort be less than gravity
When, the drop of refrigerant liquid will be caused to depart from, i.e., separated from refrigerant gas.The direction of Action of Gravity Field always to
Under, buoyancy is with gravity direction conversely, resistance is in opposite direction with liquid drop movement.
In refrigeration systems, whole refrigerant liquids are separated into a simply Utopian mistake from refrigerant gas
Journey, there is the different drop of diameter in actually vertical separation container, be typically only capable to successfully by big drop separation out, it is and small
Drop can be taken away by refrigerant gas, and some droplets are evaporated in muffler, or also could before other containers are entered
Disappear, so that it needs to be determined that the maximum gauge of the drop that can be taken away by refrigerant gas, but it is recognised that can be freezed
The maximum gauge of the drop that agent gas the is taken away also difference because of the difference of refrigerant, this maximum gauge is with specific reference to refrigeration
The thermodynamic property of agent is determined.
Gravity is for separating refrigerant liquid from refrigerant gas and keeping refrigerant liquid here in vertical separation container
Interior main power.When refrigerant drop transfixion so that the speed of freely falling body falls, gravity is exactly its resistance, then
Acceleration will be can be used for without resulting net force (with joint efforts) so that suspending drops, and can suspended because their diameter is also without foot
Enough big (quality does not have sufficiently large) is held to the buoyancy in air to can fall, but their diameter does not have yet
Have small to being pulled away or evaporating, so as to the cut off diameter of this drop to be defined as the separation diameter of refrigerant.
When this drop is in freely falling body and remain static, its maximal rate is referred to as terminal velocity, and now
Refrigerant gas in vertical separation container are moved upwards with terminal velocity, and the drop of cut off diameter still suspends, less than critical
The drop of diameter can be taken away by refrigerant gas, and the drop for being more than cut off diameter is then separated.The movement velocity of drop
Terminal velocity is reached, the gravity of drop is exactly resistance, and the computing formula of gravity is：
Wherein, above-mentioned ρfIt is Saturate liquid density of the refrigerant liquid under saturation temperature, above-mentioned ρvFor refrigerant gas exist
Saturated vapor density under saturation temperature, g is acceleration of gravity, and d is the liquid-drop diameter of refrigerant liquid.
Therefore, during suspending drops, gravity is exactly resistance, and now gravity is equal to buoyancy, and buoyancy is calculated by separating rate
Arrive, separating rate is a factor for calculating refrigerating capacity.
So, the computing formula for acting on the buoyancy of vertical separation container is as follows：
Wherein, VtFor representing separation when refrigerant liquid is separated with refrigerant gas in vertical separation container model machine
Speed.CDIt is a resistance coefficient, is Reynolds number ReA function, its universal calculation equation is：
Wherein, μvIt is the viscosity of gas, meanwhile, d, ρvAnd VtWith reference to above-mentioned explanation.
Because the drop for separating diameter still suspends, the condition of suspension is that gravity is equal to buoyancy, so as to have：
FGravity=FBuoyancy(formula 4)
Formula 1 and formula 2 are substituted into above-mentioned formula 4, then obtain formula 5, it is as follows：
According to formula 5, dividing when refrigerant liquid is separated with refrigerant gas in vertical separation container model machine will be solved
From speed Vt, such as formula 6：
103rd, according to separating rate, the universal calculation equation of the refrigerating capacity of vertical separation container model machine is obtained；
Used as a kind of optional implementation method, step 103 is specifically included：Obtain the sectional area of vertical separation container model machine；
And, obtain unit mass flow of the refrigerant in vertical separation container model machine；According to separating rate, vertical separation container sample
The sectional area and unit mass flow of machine, obtain the universal calculation equation of the refrigerating capacity of vertical separation container model machine.
According to the V obtained in above-mentioned steps 103t, and search the refrigerant of vertical separation container at the working temperature
Unit mass flow, so as to obtain the universal calculation equation of refrigerating capacity：
MRefrigerating capacity=((Vt×S0)÷MUnit mass flow) × k (formula 7)
Wherein, MRefrigerating capacityIt is the refrigerating capacity in vertical separation container, VtIt is separating rate, S0It is the section of vertical separation container
Product, MUnit mass flowIt is the refrigerant unit mass flow at the working temperature of vertical separation container, k is safety coefficient.
S0For the sectional area of vertical separation container can be calculated according to the diameter of vertical separation container.
Preferably, refrigerant can be ammonia or freon, and when refrigerant is ammonia, safety coefficient is the first preset value,
When refrigerant is freon, safety coefficient is the second preset value, wherein, the first preset value is different from the second preset value.
The universal calculation equation of the refrigerating capacity that formula 7 is obtained for the embodiment of the present invention.
104th, based on the universal calculation equation, the refrigerating capacity of the vertical separation container of target in refrigeration system is calculated.
After step 101~103 are analyzed, the universal calculation equation of refrigerating capacity is obtained.Based on the universal calculation equation, step
Rapid 104 include：
At the beginning of the design of refrigeration system, during separation container type selecting vertical to target, in the acquisition vertical separation container of target
The thermodynamics basic parameter of fixed refrigerant, i.e. saturated solution of the refrigerant of the vertical separation container of target under saturation temperature
The Saturated vapor density of volume density, the liquid-drop diameter of refrigerant and refrigerant under saturation temperature；
Refrigerant liquid in the vertical separation container of target is calculated with refrigerant gas vertical according to above-mentioned formula 6
Separating rate V when being separated in separation container model machinet；
The diameter of the vertical separation container of target is obtained, the sectional area of the vertical separation container of target is calculated according to the diameter；
According to the default evaporating temperature of the vertical separation container of target, and/or default condensation temperature, and/or feed flow temperature,
Corresponding unit mass flow is searched, the refrigerating capacity of the vertical separation container of target is then calculated according to formula 7.
In embodiments of the present invention, thermodynamics basic parameter of the refrigerant under saturation temperature, the thermodynamics base are first obtained
This parameter includes Saturate liquid density of the refrigerant under saturation temperature, the liquid-drop diameter of refrigerant and refrigerant in saturation temperature
Under Saturated vapor density；Then according to thermodynamics basic parameter, obtain refrigerant liquid and separated vertical with refrigerant gas
Separating rate when being separated in container model machine；Finally according to separating rate, obtain vertical separation container model machine refrigerating capacity it is logical
With computing formula, the universal calculation equation of vertical separation container is further obtained according to universal calculation equation.Obtaining general meter
After calculating formula, any vertical separation container (the vertical separation of target during the universal calculation equation calculates refrigeration system can be based on
Container) refrigerating capacity.As can be seen that the universal calculation equation of vertical separation container refrigerating capacity is obtained by the embodiment of the present invention,
Then can quickly and easily calculate refrigerating capacity using the universal calculation equation afterwards, it is adaptable to all vertical separation containers, and
And the accuracy of the refrigerating capacity being calculated is also higher.
Wherein, above-mentioned Saturate liquid density ρf, above-mentioned Saturated vapor density ρvRefrigerant thermal performance table can be consulted.It is single
Position mass flow can be searched and obtained, and be calculated by existing pressure-enthalpy chart.
Table 1 below is referred to, table 1 is, according to formula 7, the refrigerating capacity obtained under corresponding operating mode to be calculated respectively.In table 1, system
Cryogen is ammonia R717, and Saturated vapor densities of the ammonia R717 under saturation temperature is 0.6424kg/ ㎡, then it is in evaporating temperature
For -40 DEG C, condensation temperature be 35 DEG C when, its corresponding refrigerating capacity is as shown in table 1：
Table 1
Table 2 below is referred to, table 2 is, according to formula 7, the refrigerating capacity obtained under corresponding operating mode to be calculated respectively.In table 2, system
Cryogen is R22, and Saturated vapor densities of the R22 under saturation temperature is 7.3943kg/ ㎡, then its evaporating temperature be -30 DEG C,
When condensation temperature is 35 DEG C, its corresponding refrigerating capacity is as shown in table 2：
Table 2
Embodiment two
Fig. 2 is referred to, Fig. 2 is the structural representation of the capacity calculation device of vertical separation container disclosed in the embodiment of the present invention
Figure；As shown in Fig. 2 a kind of refrigeration device for calculating of vertical separation container may include：
Modeling unit 210, for obtaining thermodynamics basic parameter of the refrigerant under saturation temperature, thermodynamics basic parameter
The liquid-drop diameter and the Saturated vapor density of refrigerant of Saturate liquid density, refrigerant including refrigerant；According to thermodynamics base
This parameter, obtains separating rate when refrigerant liquid is separated with refrigerant gas in vertical separation container model machine；According to point
From speed, the universal calculation equation of the refrigerating capacity of vertical separation container model machine is obtained；
Refrigerating capacity computing unit 220, for the universal calculation equation obtained based on modeling unit, in calculating refrigeration system
The refrigerating capacity of the vertical separation container of target.
In embodiments of the present invention, modeling unit 210 first obtains thermodynamics basic parameter of the refrigerant under saturation temperature,
The thermodynamics basic parameter includes Saturate liquid density, the liquid-drop diameter and refrigerant of refrigerant of the refrigerant under saturation temperature
Saturated vapor density under saturation temperature；Then according to thermodynamics basic parameter, refrigerant liquid and refrigerant gas are obtained
Separating rate when being separated in vertical separation container model machine；Finally according to separating rate, vertical separation container model machine is obtained
The universal calculation equation of refrigerating capacity.After universal calculation equation is obtained, refrigerating capacity computing unit 220 can be based on the general-purpose computations
Formula calculates the refrigerating capacity of any vertical separation container (the vertical separation container of target) in refrigeration system.As can be seen that passing through
The embodiment of the present invention obtains the universal calculation equation of vertical separation container refrigerating capacity, and the universal calculation equation can be then utilized afterwards
Quickly and easily calculate refrigerating capacity, it is adaptable to all vertical separation containers, and the refrigerating capacity being calculated accuracy
It is higher.
Used as a kind of optional implementation method, above-mentioned modeling unit 210 obtains refrigerant liquid according to thermodynamics basic parameter
The specific implementation of separating rate when body is separated with refrigerant gas in vertical separation container model machine includes：
Above-mentioned modeling unit 210 is obtained according to the Saturated vapor density of refrigerant, the liquid-drop diameter of refrigerant and separating rate
The buoyancy in vertical separation container model machine must be acted on；And, the saturated air of Saturate liquid density, refrigerant according to refrigerant
The liquid-drop diameter of volume density and refrigerant, calculates the gravity of the drop of refrigerant；According to buoyancy and gravity, refrigerant liquid is obtained
Separating rate V when being separated in vertical separation container model machine with refrigerant gast。
In the computation of refrigeration system, the thermodynamics basic parameter of refrigerant, thermodynamics basic parameter are often used
Can generally be obtained from the thermal performance table search of refrigerant.Wherein, thermodynamics basic parameter includes the saturated liquid of refrigerant
Liquid-drop diameter of density, the Saturated vapor density of refrigerant and refrigerant etc..Wherein, Saturate liquid density is refrigerant can
Corresponding density during saturation temperature as liquid, the Saturated vapor density of refrigerant is that refrigerant can turn into the full of gas
Corresponding density during with temperature, it will be understood that the corresponding saturation temperature of saturated liquid of refrigerant is corresponding with saturated gas full
It is different with temperature.
Used as a kind of optional implementation method, above-mentioned modeling unit 210 is according to separating rate Vt, obtain vertical separation container
The specific implementation of the universal calculation equation of the refrigerating capacity of model machine includes：
Above-mentioned modeling unit 210 obtains the sectional area of vertical separation container model machine；And, refrigerant is obtained in vertical separation
Unit mass flow in container model machine；According to separating rate Vt, vertical separation container model machine sectional area and unit mass stream
Amount, obtains the universal calculation equation of the refrigerating capacity of vertical separation container model machine.
As a kind of optional implementation method, separating rate VtComputing formula be：
Wherein, ρfIt is the Saturate liquid density of refrigerant liquid, ρvIt is the Saturated vapor density of refrigerant gas, CDIt is resistance
Force coefficient, g is acceleration of gravity, and d is the liquid-drop diameter of refrigerant liquid.
Wherein, formula 6 is to be equal to buoyancy according to the gravity of above-mentioned drop, is then calculated V according to formula 5t。
As a kind of optional implementation method, the M of refrigerating capacityRefrigerating capacityUniversal calculation equation is：
MRefrigerating capacity=((Vt×S0)÷MUnit mass flow)×k；(formula 7)
Wherein, S0It is the sectional area of vertical separation container, MUnit mass flowIt is the refrigerant of vertical separation container in operating temperature
Under unit mass flow, k is safety coefficient.
Used as a kind of optional implementation method, refrigerant is ammonia or freon；
Used as a kind of optional implementation method, operating temperature includes evaporating temperature, and/or condensation temperature, and/or heat supply temperature
Degree.It is to be appreciated that evaporating temperature, condensation temperature and feed flow temperature can with different, or it is any 2 two it is identical, or 3
All same.
When the refrigerant of vertical separation container is ammonia, the value of safety coefficient k is the first preset value；
When the refrigerant of vertical separation container is freon, the value of safety coefficient k is the second preset value；Wherein, second is pre-
If value is different from the first preset value.
As a kind of optional implementation method, at the beginning of the design of refrigeration system, during separation container type selecting vertical to target,
Above-mentioned refrigerating capacity computing unit 220 obtains the thermodynamics basic parameter of fixed refrigerant in the vertical separation container of target, i.e.,
Saturate liquid density of the refrigerant of the vertical separation container of target under saturation temperature, the liquid-drop diameter of refrigerant and refrigerant exist
Saturated vapor density under saturation temperature；Refrigerant liquid in the vertical separation container of target is calculated according to above-mentioned formula 6
Separating rate V when being separated in vertical separation container model machine with refrigerant gast；Obtain the straight of the vertical separation container of target
Footpath, the sectional area of the vertical separation container of target is calculated according to the diameter；According to the default evaporating temperature of the vertical separation container of target,
And/or default condensation temperature, and/or feed flow temperature, corresponding unit mass flow is searched, then calculated according to formula 7
To the refrigerating capacity of the vertical separation container of target.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
Completed with instructing the hardware of correlation by program, the program can be stored in a computer-readable recording medium, storage
Medium include read-only storage (Read-Only Memory, ROM), random access memory (Random Access Memory,
RAM), programmable read only memory (Programmable Read-only Memory, PROM), erasable programmable is read-only deposits
Reservoir (Erasable Programmable Read Only Memory, EPROM), disposable programmable read-only storage (One-
Time Programmable Read-Only Memory, OTPROM), the electronics formula of erasing can make carbon copies read-only storage
(Electrically-Erasable Programmable Read-Only Memory, EEPROM), read-only optical disc (Compact
Disc Read-Only Memory, CD-ROM) or other disk storages, magnetic disk storage, magnetic tape storage or can
For carrying or computer-readable any other medium of data storage.
The refrigerating capacity computational methods and device to a kind of vertical separation container disclosed in the embodiment of the present invention are carried out above
It is discussed in detail, specific case used herein is set forth to principle of the invention and implementation method, above example
Illustrate that being only intended to help understands the method for the present invention and its core concept；Simultaneously for those of ordinary skill in the art, according to
According to thought of the invention, will change in specific embodiments and applications, in sum, this specification content
Should not be construed as limiting the invention.
Claims (14)
1. a kind of refrigerating capacity computational methods of vertical separation container, it is characterised in that including：
The thermodynamics basic parameter of refrigerant is obtained, the thermodynamics basic parameter includes that the saturated liquid of the refrigerant is close
The Saturated vapor density of degree, the liquid-drop diameter of the refrigerant and the refrigerant；
According to the thermodynamics basic parameter, obtain refrigerant liquid and separated in vertical separation container model machine with refrigerant gas
When separating rate Vt；
According to the separating rate Vt, obtain the universal calculation equation of the refrigerating capacity of the vertical separation container model machine；
Based on the universal calculation equation, the refrigerating capacity of the vertical separation container of target in refrigeration system is calculated.
2. method according to claim 1, it is characterised in that described according to the thermodynamics basic parameter, is freezed
Separating rate V when agent liquid is separated with refrigerant gas in vertical separation container model machinetIncluding：
Saturated vapor density, the liquid-drop diameter of the refrigerant and the separating rate according to the refrigerant, are acted on
Buoyancy in the vertical separation container model machine；
And, Saturate liquid density, the Saturated vapor density of the refrigerant and the refrigerant according to the refrigerant
Liquid-drop diameter, calculates the gravity of the drop of the refrigerant；
According to the buoyancy and the gravity, the refrigerant liquid is obtained with the refrigerant gas in vertical separation container sample
Separating rate V when being separated in machinet。
3. method according to claim 1, it is characterised in that described according to the separating rate Vt, obtain described vertical point
Universal calculation equation from the refrigerating capacity of container model machine includes：
Obtain the sectional area of the vertical separation container model machine；
And, obtain unit mass flow of the refrigerant in the vertical separation container model machine；
According to the separating rate, the sectional area and the unit mass flow of the vertical separation container model machine, obtain described
The universal calculation equation of the refrigerating capacity of vertical separation container model machine.
4. the method according to any one of claims 1 to 3, it is characterised in that the separating rate VtFor：
Wherein, the ρfIt is the Saturate liquid density of the refrigerant liquid, the ρvIt is the saturated gas of the refrigerant gas
Density, the CDIt is resistance coefficient, the g is acceleration of gravity, and the d is the liquid-drop diameter of the refrigerant liquid.
5. according to any described method of claims 1 to 3, it is characterised in that the universal calculation equation of the refrigerating capacity is：
MRefrigerating capacity=((Vt×S0)÷MUnit mass flow)×k；
Wherein, the S0It is the sectional area of the vertical separation container, the MUnit mass flowIt is the refrigeration of the vertical separation container
Agent unit mass flow at the working temperature, the k is safety coefficient.
6. method according to claim 5, it is characterised in that
The refrigerant is ammonia or freon；
When the refrigerant of the vertical separation container is ammonia, the value of the safety coefficient k is the first preset value；
When the refrigerant of the vertical separation container is freon, the value of the safety coefficient k is the second preset value；Wherein, institute
The second preset value is stated different from first preset value.
7. method according to claim 5, it is characterised in that the operating temperature includes evaporating temperature, and/or condensation temperature
Degree, and/or heat supply temperature.
8. a kind of refrigeration device for calculating of vertical separation container, it is characterised in that including：
Modeling unit, for obtaining thermodynamics basic parameter of the refrigerant under saturation temperature, the thermodynamics basic parameter bag
Include the Saturated vapor density of the Saturate liquid density, the liquid-drop diameter of the refrigerant and the refrigerant of the refrigerant；Root
According to the thermodynamics basic parameter, dividing when refrigerant liquid is separated with refrigerant gas in vertical separation container model machine is obtained
From speed Vt；According to the separating rate Vt, obtain the universal calculation equation of the refrigerating capacity of the vertical separation container model machine；
Refrigerating capacity computing unit, for the universal calculation equation obtained based on the modeling unit, calculates refrigeration system
The refrigerating capacity of the middle vertical separation container of target.
9. device according to claim 8, it is characterised in that
The modeling unit obtains refrigerant liquid and separates appearance vertical with refrigerant gas according to the thermodynamics basic parameter
The specific implementation of separating rate when being separated in device model machine includes：
The modeling unit is used for, Saturated vapor density, the liquid-drop diameter of the refrigerant according to the refrigerant and described
Separating rate, acquisition acts on the buoyancy in the vertical separation container model machine；And, according to the saturated liquid of the refrigerant
The liquid-drop diameter of density, the Saturated vapor density of the refrigerant and the refrigerant, calculates the weight of the drop of the refrigerant
Power；According to the buoyancy and the gravity, the refrigerant liquid is obtained with the refrigerant gas in vertical separation container sample
Separating rate when being separated in machine.
10. device according to claim 8, it is characterised in that
The modeling unit is according to the separating rate, and the general-purpose computations for obtaining the refrigerating capacity of the vertical separation container model machine are public
The specific implementation of formula includes：
Obtain the sectional area of the vertical separation container model machine；
And, obtain unit mass flow of the refrigerant in the vertical separation container model machine；
According to the separating rate, the sectional area and the unit mass flow of the vertical separation container model machine, obtain described
The universal calculation equation of the refrigerating capacity of vertical separation container model machine.
11. device according to any one of claim 8~10, it is characterised in that the separating rate is Vt：
Wherein, the ρfIt is the Saturate liquid density of the refrigerant liquid, the ρvIt is the saturated gas of the refrigerant gas
Density, the CDIt is resistance coefficient, the g is acceleration of gravity, and the d is the liquid-drop diameter of the refrigerant liquid.
12. device according to any one of claim 8~10, it is characterised in that the MRefrigerating capacityUniversal calculation equation be：
MRefrigerating capacity=((Vt×S0)÷MUnit mass flow)×k；
Wherein, the S0It is the sectional area of the vertical separation container, the MUnit mass flowIt is the refrigeration of the vertical separation container
Agent unit mass flow at the working temperature, the k is safety coefficient.
13. devices according to claim 12, it is characterised in that
The refrigerant is ammonia or freon；
When the refrigerant of the vertical separation container is ammonia, the value of the safety coefficient k is the first preset value；
When the refrigerant of the vertical separation container is freon, the value of the safety coefficient k is the second preset value；Wherein, institute
The second preset value is stated different from first preset value.
14. devices according to claim 13, it is characterised in that the operating temperature includes evaporating temperature, and/or condensation
Temperature, and/or heat supply temperature.
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| CN110580367A (en) * | 2018-06-08 | 2019-12-17 | 广州市粤联水产制冷工程有限公司 | gas-liquid separation speed calculation method and device for horizontal separation container |
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| KR100791320B1 (en) * | 2006-11-02 | 2008-01-03 | 주식회사 대우일렉트로닉스 | Control method of air-conditioner reflecting real length of refrigerant pipe |
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