CN109000949A - Water cooler appraisal procedure and power-economizing method based on water cooler thermodynamical model - Google Patents
Water cooler appraisal procedure and power-economizing method based on water cooler thermodynamical model Download PDFInfo
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- CN109000949A CN109000949A CN201810701042.6A CN201810701042A CN109000949A CN 109000949 A CN109000949 A CN 109000949A CN 201810701042 A CN201810701042 A CN 201810701042A CN 109000949 A CN109000949 A CN 109000949A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a kind of water cooler appraisal procedures based on water cooler thermodynamical model, comprising the following steps: step 1: operation data in measurement water cooler；Step 2: water cooler thermodynamical model is constructed by the thermodynamic property of the evaporator of water cooler, condenser and compressor；Step 3: the quiescent dissipation of water cooler and the associated data of the chilled water temperature difference is calculated in the measurement data measured in DATA REASONING step input thermodynamical model；Step 4: by the associated data comparative analysis of actual power loss and chilled water temperature difference incidence number value and quiescent dissipation and the chilled water temperature difference in water cooler actual motion, generating analysis data, analyze the actual operating state of water cooler.Based on water cooler evaporator, condenser, compressor thermodynamic behaviour, by the conservation of energy and the conservation of mass, quickly generates and the separate unit machine thermodynamic property model of full-scope simulation is carried out to the operating condition of each component of water cooler to assess the operating condition of water cooler.
Description
Technical field
The present invention relates to heating and ventilation project field, specially a kind of water cooler assessment based on water cooler thermodynamical model
Method and power-economizing method.
Background technique
With the fast development of current social, requirement of the people to the comfort of its local environment is promoted constantly, so that
Air-conditioning system becomes indispensable part in daily life and industrial processes, according to statistics, into after 21 century, greatly
Energy consumption proportion in national total energy consumption is higher and higher inside type public building, wherein the energy consumption of water cooler is large-scale public
Building interior energy consumption also accounts for significant proportion altogether.It therefore, is to respond national energy conservation and emission reduction number to the Optimization of Energy Saving of water cooler
It calls together, realizes modernization sustainable development institute urgent problem to be solved.
Existing Central air-conditioning unit is designed with meeting the maximum cold and hot amount of field of employment, and water cooler is also
Be in this way, and in practical applications, the cooling and heating load of consumption is variation, generally and design maximum for cold and hot amount, there is very big
Difference, system equipment run about 90% or more time operate in undercapacity rated condition.So needing one kind can effectively sentence
The disconnected whether ideal appraisal procedure of water cooler operation energy consumption, to assess the operating status of water cooler.
Summary of the invention
It is an object of that present invention to provide a kind of based on the water cooler appraisal procedure of water cooler thermodynamical model and energy conservation
Method, based on water cooler evaporator, condenser, compressor thermodynamic behaviour, by the conservation of energy and the conservation of mass, quickly
The separate unit machine thermodynamic property model that full-scope simulation is carried out to the operating condition of each component of water cooler is generated, for assessing cold water
The operating condition of unit.
In order to achieve the above object, technical solution of the present invention has:
A kind of water cooler appraisal procedure based on water cooler thermodynamical model, comprising the following steps:
DATA REASONING step: chilled water leaving water temperature, the chilled water temperature difference, chilled-water flow, cooling in measurement water cooler
Water inflow temperature and cooling water flow；
Building water cooler thermodynamical model step: pass through the heating power of the evaporator of water cooler, condenser and compressor
It learns performance and constructs water cooler thermodynamical model；
Model calculates step: by the chilled water leaving water temperature measured in DATA REASONING step, the chilled water temperature difference, freezing
Water flow, cold in-water temperature and cooling water flow input the benchmark function that water cooler is calculated in the thermodynamical model
The associated data of consumption and the chilled water temperature difference；
Comparative evaluation step: by the actual power loss and chilled water temperature difference incidence number value and benchmark in water cooler actual motion
The associated data comparative analysis of power consumption and the chilled water temperature difference generates analysis data, analyzes the actual operating state of water cooler.
Further, the step further include:
It draws curve graph step: drawing the associated data curve graph of quiescent dissipation and the chilled water temperature difference.
Further, the comparative evaluation step replacement are as follows:
By the incidence number for being associated with numerical value and substituting into the quiescent dissipation Yu the chilled water temperature difference of actual power loss and the chilled water temperature difference
According to curve graph comparative analysis, analysis data are generated, the actual operating state of water cooler is analyzed.
Preferably, the associated data of the quiescent dissipation and the chilled water temperature difference is equipped with multiple groups, respectively different water coolers
The associated data of quiescent dissipation and the chilled water temperature difference under rate of load condensate.
Preferably, the comparative evaluation step further include:
Intercept power consumption compared with lower part quiescent dissipation and the chilled water temperature difference associated data again with actual power loss and chilled water
The association numerical value comparative analysis of the temperature difference.
Further, the water cooler thermodynamical model calculation process is as follows:
Process 1: chilled water leaving water temperature, the chilled water temperature difference, chilled-water flow, cold in-water temperature and cooling are obtained
Water flow；
Process 2: assuming that outlet temperature when compressor progress isentropic Compression；
Process 3: condenser inlet parameter, condensator outlet parameter and evaporator parameter are calculated；
Process 4: assuming that cooling water leaving water temperature；
Process 5: assuming that the heat exchange amount of evaporator；
Process 6: evaporator refrigerant side heat exchange amount is calculated；
Process 7: judge whether evaporator refrigerant side heat exchange amount is equal with the heat exchange amount of evaporator；It is then to execute process
8；It is no, then execute process 5；
Process 8: cooling water side heat exchange amount is calculated；
Process 9: judge whether cooling water side heat exchange amount is equal with refrigerant side heat exchange amount；It is then to execute process 10, it is no,
Then execute process 4；
Process 10: the refrigerant flow and evaporator inner refrigerant flow in condenser are calculated；
Process 11: judge whether refrigerant flow in condenser and evaporator inner refrigerant flow are equal；It is then to execute
Process 12；It is no, then execute process 2；
Process 12: compressor power consumption is calculated.
Further, the water cooler thermodynamical model calculation formula is as follows:
Each parameter has following relationship in evaporator:
The refrigerant side coefficient of heat transfer:
The chilled water side coefficient of heat transfer:
The total heat transfer process of evaporator:
Each parameter has following relationship in condenser:
The refrigerant side coefficient of heat transfer:
The cooling water side coefficient of heat transfer:
Total heat transfer process in condenser；
A kind of power-economizing method using above-mentioned water cooler appraisal procedure, comprising: control module, control module is for controlling
Water cooler operation；And controller, the controller include memory, processor, are stored with computer on the memory
Program, the computer program can be realized following steps when being executed by processor:
Receiving step: control module receives the analysis data；
Rate-determining steps；The control module analysis data received generate control signal；
Set-up procedure；Water cooler receives the control signal of control module, and accordingly adjusts the chilled water temperature difference of its own
Or chilled-water flow data.
According to the present invention based on the water cooler appraisal procedure and power-economizing method of water cooler thermodynamical model, pass through foundation
The thermodynamical model of water cooler obtains water cooler operation power consumption and operating condition assessment benchmark.Further, it is also possible to establishing respectively
Assessment benchmark under the rate of load condensate of different water coolers, convenient for assessing the water cooler under different load rate, acquisition is real
Border runs the numerical value that is associated with of lower water cooler actual operation power consumption and the chilled water temperature difference under different load rate, by analyzing base
The numerical value of quasi- data and actual numerical value come judge assess water cooler operating status；Preferably, can also by quiescent dissipation with
The associated data of the chilled water temperature difference is depicted as curve graph, and actual operation power consumption and the chilled water temperature difference are associated with numerical value then with scattered
The form cloth of point judges the practical fortune of water cooler in the curve graph, by calculating scatterplot at a distance from reference data curve
The extent of deviation of row power consumption and benchmark operation power consumption, certain judgment basis is provided for water cooler fault diagnosis；Preferably, also
Reference data can be intercepted, intercept optimal reference data of the lower partial data of power consumption as more accurate science, lead to
It crosses and is compared with actual condition numerical value, it can be determined that the water cooler actual motion chilled water temperature difference is to the inclined of optimal reference data
From degree, water cooler operating condition is adjusted for user, makes water chilling unit energy-saving efficient operation, certain theoretical direction is provided；
And by the operating condition of analysis water cooler, the chilled water temperature difference of water cooler is adjusted, so that the operation of water cooler is more
The closely optimal reference data of adjunction, is conducive to the energy-saving and emission-reduction of water cooler.
Detailed description of the invention
Fig. 1 is the curve graph of water cooler quiescent dissipation and the chilled water temperature difference under different load rate；
Fig. 2 is compressor power consumption calculation flow chart；
Fig. 3 is the curve graph of compressor power consumption and the chilled water temperature difference；
Fig. 4 is the curve graph of pump consumption and the chilled water temperature difference.
Specific embodiment
A kind of water cooler appraisal procedure and section based on water cooler thermodynamical model of the invention is described with reference to the drawings
It can method.
For the present invention, the first step is to establish the thermodynamical model of water cooler, according to the first law of thermodynamics, energy
In conversion process, total value remains unchanged amount.For a water cooler, then steamed in the three big components for constituting cold water water dispenser group
It sends out between device, condenser and compressor, the total value of energy transmission is conservation；And for the refrigerant circulation of water cooler,
The total system in the process of running of water cooler be it is closed, the material of closed system is also conservation, i.e. the amount of refrigerant is
Conservation.
Using water cooler common on the market as research object, it is easy to know its own nominal parameter and its use
Refrigerant model, can also know the thermodynamic parameter of refrigerant easily by inquiring.
It also needs to measure chilled water leaving water temperature, freezing temperature in water cooler by the common measuring tool such as sensor
Difference, chilled-water flow, cold in-water temperature and cooling water flow are as known amount.
Water cooler thermodynamical model is constructed, needs to carry out heating power to the evaporator, condenser and compressor of water cooler
Credit analysis.
For evaporator:
Diabatic process in evaporator includes: the boiling heat transfer of refrigerant side, chilled water side heat convection and by changing
Heat pipe wall and schmutzband it is thermally conductive.Pass through the convection transfer rate of refrigerant side, refrigerating capacity, the qualitative flow velocity of chilled water, freezing
Water side to fluidizing 9 control Coupled Variable equations such as hot coefficient, available evaporating temperature and refrigerating capacity, chilled-water flow,
The functional relation of chilled water leaving water temperature, chilled water inflow temperature.
Each parameter has following relationship in evaporator:
The refrigerant side coefficient of heat transfer:
The chilled water side coefficient of heat transfer:
The total heat transfer process of evaporator:
For condenser:
The diabatic process of condenser includes: the condensing heat-exchange of refrigerant, thermally conductive and cooling water the suction of metallic walls, dirty layer
Thermal process.It is refrigerant on the inside of general shell and tube condenser pipe, is chilled water on the outside of pipe.By the entire thermal resistance of diabatic process,
11 control Coupled Variable equations such as physical parameter of refrigeration machine, it is available evaporating temperature and refrigerating capacity, cooling water flow, cold
But the functional relation of water inflow temperature.
Each parameter has following relationship in condenser:
The refrigerant side coefficient of heat transfer:
The cooling water side coefficient of heat transfer:
Total heat transfer process in condenser；
For compressor:
Pass through 10 control Coupled Variables such as the total power consumption of compressor, the shaft power of compressor, theoretical power consumption of compressor
Equation, the relational expression of the available conservation of energy.Finally by the successive ignition to condensation temperature, the list under given operating condition is calculated
Platform machine runs power consumption.
The thermodynamical model of water cooler is established according to relation above, calculation process includes: as shown in Figure 2
Process 1: chilled water leaving water temperature, the chilled water temperature difference, chilled-water flow, cold in-water temperature and cooling are obtained
Water flow；
Process 2: assuming that outlet temperature when compressor progress isentropic Compression；
Process 3: condenser inlet parameter, condensator outlet parameter and evaporator parameter are calculated；
Process 4: assuming that cooling water leaving water temperature；
Process 5: assuming that the heat exchange amount of evaporator；
Process 6: evaporator refrigerant side heat exchange amount is calculated；
Process 7: judge whether evaporator refrigerant side heat exchange amount is equal with the heat exchange amount of evaporator；It is then to execute process
8；It is no, then execute process 5；
Process 8: cooling water side heat exchange amount is calculated；
Process 9: judge whether cooling water side heat exchange amount is equal with refrigerant side heat exchange amount；It is then to execute process 10, it is no,
Then execute process 4；
Process 10: the refrigerant flow and evaporator inner refrigerant flow in condenser are calculated；
Process 11: judge whether refrigerant flow in condenser and evaporator inner refrigerant flow are equal；It is then to execute
Process 12；It is no, then execute process 2；
Process 12: compressor power consumption is calculated.
Rate of load condensate=refrigerating capacity/rated cooling capacity alleged by the present invention
At this point, only calculate compressor power consumption, when calculating the quiescent dissipation of water cooler it should also be taken into account that the power consumption of water pump,
The calculation formula of pump consumption is as follows:
Frictional resistance when chilled water flow pervaporation device are as follows:
Coefficient of frictional resistance are as follows:
ξ=0.457Re_o -0.211
Local resistance when chilled water flow pervaporation device are as follows:
Chilled water passes through drag overall when evaporator:
ΔpHost=Δ p1+Δp2
Water pump pressure difference:
ΔpWater pump=Δ pBypass+ΔpHost
Pump head:
By taking the water cooler of 1000RT on the market as an example, refrigerant R134a calculates cold water according to above-mentioned thermodynamical model
Unit quiescent dissipation, calculating process are as follows:
Working condition is calculated with set structure parameter respectively at lower shown:
Unit working condition:
Set structure parameter:
1, evaporator Work condition analogue
Diabatic process in evaporator includes the boiling heat transfer of refrigerant side, chilled water side heat convection and passes through heat exchange
Tube wall and schmutzband it is thermally conductive.Dirtiness resistance RfoTake 0.00011m2K/W, therefore the Composite Walls of heat transfer process are as follows:
Assuming that an evaporating temperature to, fin inned coefficient takes 1.5 to evaporator tube outside, and parallel (2), formula (3) can must be made
Cryogen side coefficient of heat transfer hR134a。
Parallel (4), (5), (6), (7) can obtain chilled water side coefficient of heat transfer ho。
Parallel (8), (9) can obtain actual evaporation temperature to_act。
Qo=AoKoΔt (8)
Compare toWith to_actSize assumes t when deviation amplitude is greater than 0.001 againo, it is iterated, it is inclined until calculating
Difference is less than 0.001, (when deviation amplitude is less than 0,001, then it is assumed that toWith to_actEssence is equal).
2, condenser and working conditions of compressor are simulated
Diabatic process in condenser includes the boiling heat transfer of refrigerant side, chilled water side heat convection and passes through heat exchange
Thermally conductive, the dirtiness resistance R of tube wall and schmutzbandfkTake 0.00015m2K/W, the entire thermal resistance of heat transfer process are as follows:
Assuming that the outlet pressure p of a compressorout, the condensation temperature t of condenser can be obtained by looking into physical parameter tablek, it is assumed that one
A cooling water leaving water temperature tcool_ex, the logarithm heat transfer temperature difference △ t of condenser can be calculated by formula (11)k:
Assuming that a condenser heat exchange amount Qk, parallel (12), (13), (14) can obtain condenser inner refrigerant side heat exchange system
Number hR134a_k, the wherein thermal coefficient λ of refrigerantR134a, density pR134a, dynamic viscosity νR134aCondensation temperature t can be passed throughkInquire object
Property parameter list obtain.
The coefficient of heat transfer calculation of cooling water side with evaporator chilled water side calculation, it can thus be concluded that cooling water side
Coefficient of heat transfer hk.The practical heat exchange amount Q of condenser can be calculated by formula (15)k_act。
Qk_act=AkKkΔt (15)
Compare Qk_actWith QkSize assumes Q when deviation amplitude is greater than 0.001 againk, it is iterated, it is inclined until calculating
Difference is less than 0.001.Practical cooling water leaving water temperature t can be calculated by formula (16)cool_ex_act。
Compare tcool_ex_actWith tcool_exSize assumes t when deviation amplitude is greater than 0.001 againcool_ex, change
Generation, until calculating deviation less than 0.001.Pass through poutInquiry physical parameter table can obtain evaporator enthalpy heva_in, in 1.
Calculated evaporating temperature to_actInquiry physical parameter table can obtain evaporator outlet enthalpy heva_out, evaporation can be calculated by formula (17)
Device refrigerant flow qma_o。
Pass through poutWith to_actInquiry physical parameter table can obtain compressor outlet enthalpy hcom_out_actWith compressor inlet enthalpy
Value hcom_in, parallel (18), (19) can obtain compressor actual power loss.
ηs=0.28168+1.14249 (φ -0.2)
-0.59051·(φ-0.2)2-0.69255·(φ-0.2)3
+1.42011·(φ-0.2)4-0.83229·(φ-0.2)5 (19)
The outlet enthalpy h compressed under isentropic Compression can be obtained by formula (20)com_out, i.e. the import enthalpy of condenser.
hcom_out=W-hcom_in(20)
Condenser refrigerant flow q can be obtained by formula (21)ma_k。
Compare qma_oWith qma_kxSize assumes p when deviation amplitude is greater than 0.001 againout, it is iterated, Zhi Daoji
Deviation is calculated less than 0.001.Model is closed at this time, calculates convergence.Compressor power consumption can be calculated by following formula:
Pe=qma_k·(hcom_out-hcom_in) (22)
3, pump consumption calculates
Parallel (23), (24), (25), (26) can obtain drag overall △ p when chilled water passes through evaporatorHost。
ΔpHost=Δ p1+Δp2 (26)
Known bypass circulation is for return water pressure difference, water pump pressure difference are as follows:
ΔpWater pump=Δ pBypass+ΔpHost (27)
Pump head can be acquired as a result:
Inquiry characteristic curve of pump can obtain efficiency of pump η.Therefore pump consumption are as follows:
Under rate of load condensate φ is 40%, 60%, 80%, 100%, compressor of the chilled water temperature difference from 1 DEG C to 7 DEG C.
Power consumption calculation data are as follows:
Such as Fig. 3, the compressor power consumption obtained-freezing temperature difference data is depicted as curve.
Calculate pump consumption-freezing temperature difference data is as follows:
Such as Fig. 4, pump consumption-freezing temperature difference data is depicted as curve.
Calculate water cooler quiescent dissipation-freezing temperature difference data is as follows:
Such as Fig. 1, water cooler quiescent dissipation-freezing temperature difference data will be calculated and be depicted as curve graph, according to Fig. 1 and Fig. 3-
Known to curve map analysis shown in 4:
1, such as Fig. 3, with the increase of chilled water disengaging water temperature difference, the power consumption of compressor is also increased with it；Such as Fig. 4, with
Chilled water passes in and out the increase of water temperature difference, and the power consumption of water pump starts to reduce.
2, such as Fig. 1, with the increase of chilled water disengaging water temperature difference, the total quiescent dissipation of water cooler constantly reduces.This be because
To be constantly increasing with the increase of the chilled water water inlet temperature difference, host power consumption, the power consumption of water pump is steadily decreasing, and pump consumption
Reduced amplitude will be far longer than the increased amplitude of host power consumption, so the reduction of whole unit total energy consumption is resulted in, in curve
Second half section, since the reduction amplitude of the power consumption of water pump slows down；The reduction amplitude for eventually leading to total power consumption slows down, also, theoretical
Upper (practical chilled water disengaging water temperature difference may and be unable to satisfy ideal situation), with being gradually increased for the temperature difference, total power consumption curve
Tendency will raise up, i.e., total energy consumption increase.
So the lower the water cooler chilled water temperature difference not the better, it is applicable in section there is best, in Fig. 1 curve
Concave point；At low load, it is necessary to the temperature difference is reduced lower, can be only achieved the energy-saving effect under high load capacity, and this will certainly increase
Add energy-efficient financial burden, so wanting to make temperature difference section fall most preferably applicable section shown in Fig. 1 by controlling chilled-water flow
Energy consumption is reduced, then, keep water cooler to run under higher load condition.
The present invention gives several quiescent dissipation-freezing temperature difference datas that how to intercept and forms the side for being most preferably applicable in section
Method.
A quiescent dissipation value is arranged in embodiment 1, and directly interception, which is less than quiescent dissipation, is worth data as optimal use area
Between；
Embodiment 2 finds most preferably applicable point, i.e. concave point in Fig. 1 curve in Fig. 1, calculates the slope of the point, and with
Slopes of other points on homologous thread are analyzed, take with the slope float up and down 5% constant interval as best suitable
Use section.
Take actual operation power consumption and the chilled water temperature difference be associated with numerical value then in the form of scatterplot cloth in the curve graph
Judge that water cooler actual motion power consumption runs the inclined of power consumption with benchmark at a distance from reference data curve by calculating scatterplot
Poor degree provides certain judgment basis for water cooler fault diagnosis；As the actual motion power consumption and benchmark of water cooler are transported
Row power consumption deviation is excessive, it can be determined that water cooler runs abnormal needs maintenance or water cooler and aging.
A kind of power-economizing method using above-mentioned water cooler appraisal procedure, passes through quiescent dissipation and chilled water temperature difference incidence number
According to the comparative analysis with actual power loss and chilled water temperature difference incidence number value, analysis data are generated, control module is correspondingly arranged, are received
It analyzes data and generates control signal, water cooler and is accordingly adjusted its own freezing temperature by the control signal of control module
Difference or chilled-water flow data.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is modified.Therefore, the invention is not limited to the specific embodiments disclosed and described above, to of the invention
Some modifications and changes should also be as falling into the scope of the claims of the present invention.In addition, although being used in this specification
Some specific terms, these terms are merely for convenience of description, does not limit the present invention in any way.
Claims (8)
1. a kind of water cooler appraisal procedure based on water cooler thermodynamical model, which comprises the following steps:
DATA REASONING step: measurement water cooler in chilled water leaving water temperature, the chilled water temperature difference, chilled-water flow, cooling water into
Coolant-temperature gage and cooling water flow；
Building water cooler thermodynamical model step: pass through the thermodynamics of the evaporator of water cooler, condenser and compressor
The thermodynamical model of water cooler can be constructed；
Model calculates step: by chilled water leaving water temperature, the chilled water temperature difference, chilled-water flow, cold in-water temperature and cold
But water flow inputs the thermodynamical model and the quiescent dissipation of water cooler and the associated data of the chilled water temperature difference is calculated；
Comparative evaluation step: by the actual power loss and chilled water temperature difference incidence number value and quiescent dissipation in water cooler actual motion
With the associated data comparative analysis of the chilled water temperature difference, analysis data are generated, the actual operating state of water cooler is assessed.
2. water cooler appraisal procedure according to claim 1, which is characterized in that the step further include:
It draws curve graph step: drawing the associated data curve graph of quiescent dissipation and the chilled water temperature difference.
3. water cooler appraisal procedure according to claim 2, which is characterized in that the comparative evaluation step replacement are as follows:
By the associated data song for being associated with numerical value and substituting into the quiescent dissipation and the chilled water temperature difference of actual power loss and the chilled water temperature difference
Line chart comparative analysis generates analysis data, assesses the actual operating state of water cooler.
4. water cooler appraisal procedure according to claim 1-3, which is characterized in that the quiescent dissipation with it is cold
The associated data for freezing water temperature difference is equipped with multiple groups, the quiescent dissipation and the chilled water temperature difference under respectively different water cooler rate of load condensates
Associated data.
5. water cooler appraisal procedure according to claim 4, which is characterized in that the comparative evaluation step further include:
Intercept power consumption compared with lower part quiescent dissipation and the chilled water temperature difference associated data again with actual power loss and the chilled water temperature difference
Association numerical value comparative analysis.
6. water cooler appraisal procedure according to claim 1, which is characterized in that the water cooler thermodynamical model meter
Calculating process includes:
Process 1: chilled water leaving water temperature, the chilled water temperature difference, chilled-water flow, cold in-water temperature and cooling water flow are obtained
Amount；
Process 2: assuming that outlet temperature when compressor progress isentropic Compression；
Process 3: condenser inlet parameter, condensator outlet parameter and evaporator parameter are calculated；
Process 4: assuming that cooling water leaving water temperature；
Process 5: assuming that the heat exchange amount of evaporator；
Process 6: evaporator refrigerant side heat exchange amount is calculated；
Process 7: judge whether evaporator refrigerant side heat exchange amount is equal with the heat exchange amount of evaporator；It is then to execute process 8；It is no,
Then execute process 5；
Process 8: cooling water side heat exchange amount is calculated；
Process 9: judge whether cooling water side heat exchange amount is equal with refrigerant side heat exchange amount；It is then to execute process 10, it is no, then it holds
Row process 4；
Process 10: the refrigerant flow and evaporator inner refrigerant flow in condenser are calculated；
Process 11: judge whether refrigerant flow in condenser and evaporator inner refrigerant flow are equal；It is then to execute process
12；It is no, then execute process 2；
Process 12: compressor power consumption is calculated.
7. water cooler appraisal procedure according to claim 6, which is characterized in that the water cooler thermodynamical model meter
Calculating formula includes:
Each parameter has following relationship in evaporator:
The refrigerant side coefficient of heat transfer:
The chilled water side coefficient of heat transfer:
The total heat transfer process of evaporator:
Each parameter has following relationship in condenser:
The refrigerant side coefficient of heat transfer:
The cooling water side coefficient of heat transfer:
Total heat transfer process in condenser；
8. a kind of power-economizing method using any one of claim 1 to the 7 water cooler appraisal procedure, comprising: control module,
Control module is for controlling water cooler operation；And controller, the controller include memory, processor, the storage
Computer program is stored on device, the computer program can be realized following steps when being executed by processor:
Receiving step: control module receives the analysis data；
Rate-determining steps；The control module analysis data received generate control signal；
Set-up procedure；Water cooler receives the control signal of control module, and accordingly adjusts the chilled water temperature difference or cold of its own
Freeze water flow data.
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Cited By (4)
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| CN113281074A (en) * | 2021-05-17 | 2021-08-20 | 青岛海信日立空调系统有限公司 | Performance degradation diagnosis method for condenser and evaporator of water chilling unit |
| CN114383875A (en) * | 2021-12-16 | 2022-04-22 | 深圳市前海能源科技发展有限公司 | Dual-working-condition water chilling unit performance testing method and system and storage medium |
| CN115207395A (en) * | 2022-07-21 | 2022-10-18 | 武汉雄韬氢雄燃料电池科技有限公司 | Evaluation method for intercooler of fuel cell system |
| WO2023125853A1 (en) * | 2021-12-31 | 2023-07-06 | 华南理工大学 | Thermodynamic model calculation method and equipment for multi-equipment operation of refrigeration source system |
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| CN114383875A (en) * | 2021-12-16 | 2022-04-22 | 深圳市前海能源科技发展有限公司 | Dual-working-condition water chilling unit performance testing method and system and storage medium |
| CN114383875B (en) * | 2021-12-16 | 2024-02-09 | 深圳市前海能源科技发展有限公司 | Dual-working-condition water chiller performance test method, system and storage medium |
| WO2023125853A1 (en) * | 2021-12-31 | 2023-07-06 | 华南理工大学 | Thermodynamic model calculation method and equipment for multi-equipment operation of refrigeration source system |
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