CN102345951A - Energy efficiency estimation online monitoring system for refrigerating system - Google Patents
Energy efficiency estimation online monitoring system for refrigerating system Download PDFInfo
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- CN102345951A CN102345951A CN2011102055537A CN201110205553A CN102345951A CN 102345951 A CN102345951 A CN 102345951A CN 2011102055537 A CN2011102055537 A CN 2011102055537A CN 201110205553 A CN201110205553 A CN 201110205553A CN 102345951 A CN102345951 A CN 102345951A
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Abstract
The invention discloses an energy efficiency estimation online monitoring system for a refrigerating system, which is used for online monitoring on temperature, pressure and energy consumption in the refrigerating system. The monitoring system comprises a data acquisition device, a room temperature-energy consumption modification and display device, a refrigerating coefficient modification and display device and a monitoring center. The monitoring center is connected with the data acquisition device via the Internet or the GPRS (General Packet Radio Service); the data acquisition device acquires the room temperature and temperature, pressure and energy consumption parameters of the refrigerating system; the room temperature-energy consumption modification and display device modifies the refrigerating system energy consumption acquired by the data acquisition device, and further outputs the modified data; the refrigerating coefficient modification and display device modifies the refrigerating coefficients, and further outputs the modified data; and the monitoring center finishes the works of analyzing the temperature, the pressure, the actual energy efficiency coefficient and the energy consumption of the refrigerating system, executing early warning, displaying, querying and the like, thereby realizing online monitoring and fault diagnosis, maintaining high-efficiency operation of the whole refrigerating system and facilitating the energy efficiency estimation on energy-saving reconstruction projects of the refrigerating system.
Description
Technical field
The present invention relates to a kind of efficiency and be evaluated at line monitoring system, more particularly, relate to a kind of refrigeration system efficiency and be evaluated at line monitoring system.
Background technology
In recent years, along with the pay attention to day by day of international community, start one after another for the reducing energy consumption project of the refrigeration system of high power consumption to energy-saving and emission-reduction.For this type of technological transformation project, one of them important problem is exactly the checking for energy-saving effect before and after transforming.At present, general method is that independent ammeter is installed in refrigeration system, through power consumption before and after the technological transformation to the energy-conservation situation of monitoring system recently.The method subject matter is, directly reads the energy consumption data through ammeter, does not consider that external environment changes the influence to refrigeration system.The variation of room temperature is to influence the main factor that the refrigeration system energy consumption changes.Existing monitoring system can not influence the room temperature variation to be taken into account system power dissipation; And can only be chosen at the more stable time period of room temperature; Or change the influence bring and carry out the power consumption contrast through ignoring room temperature, both reduced operating efficiency, influence the accuracy of reducing energy consumption compliance test result again.In addition, rely on merely power consumption contrast can not monitor the transformation of refrigeration system before and after running status change, be difficult to find the fault that possibly exist and occur, so be difficult to more effectively guidance system optimization with removal system.
Summary of the invention
The technical problem that the present invention will solve is, to the above-mentioned defective of prior art, provides a kind of refrigeration system efficiency to be evaluated at line monitoring system.
The technical solution adopted for the present invention to solve the technical problems is: a kind of refrigeration system efficiency is evaluated at line monitoring system, and it comprises:
Data acquisition unit (102) is used to gather temperature, pressure, the power consumption parameter of room temperature and refrigeration system (101);
Room temperature-power consumption correction display unit (103) receives the power consumption that data acquisition unit (102) is gathered, and according to the said power consumption of room temperature correction, and the output of the power consumption that will revise shows;
Coefficient of refrigerating performance correction display unit (104) receives the data that data acquisition unit (102) is gathered, and according to the compressor efficiency revised theory coefficient of refrigerating performance of Kano coefficient and refrigeration system, and the coefficient of refrigerating performance that will revise output demonstration.
Be evaluated in the line monitoring system in refrigeration system efficiency of the present invention; Said room temperature-power consumption correction display unit (103) comprises room temperature-power consumption amending unit, actual power loss display unit; Said room temperature-power consumption amending unit is stored the corresponding power consumption correction value of each room temperature in advance, and said actual power loss display unit is used to show actual power loss.
Be evaluated in the line monitoring system in refrigeration system efficiency of the present invention; Said coefficient of refrigerating performance correction display unit (104) comprises coefficient of refrigerating performance amending unit, actual coefficient of refrigerating performance display unit; Said coefficient of refrigerating performance amending unit is used for the compressor efficiency revised theory coefficient of refrigerating performance according to Kano coefficient and refrigeration system, and said actual coefficient of refrigerating performance display unit is used to show the coefficient of refrigerating performance of having revised.
Be evaluated in the line monitoring system in refrigeration system efficiency of the present invention, said data acquisition unit (102) comprises temperature collecting cell, pressure acquisition unit, power consumption collecting unit.
Be evaluated in the line monitoring system in refrigeration system efficiency of the present invention; Said data acquisition unit (102) is connected with remote monitoring center (105) through internet or GPRS, and said room temperature-power consumption correction display unit (103), coefficient of refrigerating performance correction display unit (104) all are located at said monitoring center (105).
Be evaluated in the line monitoring system in refrigeration system efficiency of the present invention, said room temperature-power consumption correction display unit (103), coefficient of refrigerating performance correction display unit (104) are realized by same server.
Be evaluated in the line monitoring system in refrigeration system efficiency of the present invention, said monitoring center (105) also comprises:
Distributed-network monitoring platform (202) is real time operating system, the data base set on the platform of computer operating system, the set up user's application system of unifying, and is used for that user authority management, user basic information are safeguarded, the statistics of Monitoring Data and calculating, early warning processing etc.;
Network communication module (201) is connected with said distributed-network monitoring platform (202), is used for receiving the information of being sent through internet or GPRS by said data acquisition unit (102) and handles;
Service Management instrument (203) is connected with said distributed-network monitoring platform (202), is database management module and the system management facility of go up setting up at said distributed-network monitoring platform (202), is used for management, diagnosis, analysis etc. to system and device;
Website release unit (204) is connected with said distributed-network monitoring platform (202), is used to issue monitoring result.
Be evaluated in the line monitoring system compression ratio unit (2021), degree of supercooling unit (2022), degree of superheat unit (2023) that said distributed-network monitoring platform (202) comprises alarm unit (2024), is connected respectively with said alarm unit (2024) in refrigeration system efficiency of the present invention.
Be evaluated in the line monitoring system in refrigeration system efficiency of the present invention, it is on-the-spot that said room temperature-power consumption correction display unit (103), coefficient of refrigerating performance correction display unit (104) all are located at said refrigeration system.
The refrigeration system efficiency of embodiment of the present invention is evaluated at line monitoring system; Have following beneficial effect: refrigeration system is gathered the temperature of refrigeration system through data acquisition unit; Pressure; The power consumption parameter; Change for the influence of refrigeration system power consumption and the actual efficiency carried out after the energy-conservation technological transformation through coefficient of refrigerating performance correction display unit correction coefficient of refrigerating performance and real-time exhibition refrigeration system through room temperature-power consumption correction display unit correction room temperature; And show analysis result for the user through a website; Make the user can be online; Intuitively; In real time; Detect the ruuning situation of whole refrigeration system exactly; Therefore; Refrigeration system efficiency of the present invention is evaluated at line monitoring system and not only the checking of energy-saving effect before and after the refrigeration system transformation is had important effect; Can also find the fault that possibly exist and occur with removal system, more effective guidance system cooling system is optimized.
Description of drawings
To combine accompanying drawing and embodiment that the present invention is described further below, in the accompanying drawing:
Fig. 1 is the structure chart that refrigeration system efficiency of the present invention is evaluated at line monitoring system;
Fig. 2 is the structural representation that refrigeration system efficiency of the present invention is evaluated at monitoring center in the line monitoring system.
The specific embodiment
In order to make the object of the invention clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As shown in Figure 1, be evaluated in the line monitoring system in a kind of refrigeration system efficiency of the present invention, it comprises data acquisition unit 102, room temperature-power consumption correction display unit 103, coefficient of refrigerating performance correction display unit 104 and monitoring center 105.Data acquisition unit 102 is used to gather temperature, pressure, the power consumption parameter of room temperature and refrigeration system 101; Gather the suction temperature T of compressor
S, compressor exhaust temperature T
D, condenser cooling medium liquid fluid line temperature T
L, space temperature T is cooled
B, room temperature T
A, the compressor air suction pressure P
S, Compressor Discharge Pressure P
D, energy consumption of compressor W
C, total system power consumption W, evaporator evaporation temperature T
ERoom temperature-power consumption correction display unit 103 receives the power consumption that data acquisition unit 102 is gathered, and according to the said power consumption of room temperature correction, and the output of the power consumption that will revise shows; Coefficient of refrigerating performance correction display unit 104 receives the data that data acquisition unit 102 is gathered, and according to the compressor efficiency revised theory coefficient of refrigerating performance of Kano coefficient and refrigeration system, and the coefficient of refrigerating performance that will revise output demonstration.Data acquisition unit 102 is monitored the data to be monitored of refrigeration system according to designing requirement, and sends to monitoring center 105 by the time cycle of setting, by monitoring center 105 accomplish information reception, handle and be published to the website.Query site information comprises: evaporating temperature T
E, condensation temperature T
C, compressor pressure ratios R, degree of supercooling, the degree of superheat, actual coefficient of refrigerating performance COP, refrigeration system total energy consumption W, compressor air suction pressure P s, Compressor Discharge Pressure P
D, power consumption variation etc.The needed a series of data of user such as the early warning of monitoring center's 105 completion refrigeration system on-line monitorings, demonstration, system diagnostics, maintenance, inquiry, information issue, data forwarding, printing.
Fig. 2 is the concrete structure of monitoring center 105 of the present invention.Said monitoring center 105 comprises: distributed-network monitoring platform 202; Be real time operating system, the data base set on the platform of computer operating system, the set up user's application system of unifying, be used for that user authority management, user basic information are safeguarded, the statistics of Monitoring Data and calculating, early warning processing etc.; Network communication module 201 is connected with distributed-network monitoring platform 202, is used to receive the information of being sent through the internet by data acquisition unit and handles; Service Management instrument 203 is connected with distributed-network monitoring platform 202, is database management module and the system management facility of on distributed-network monitoring platform 202, setting up, and is used for management, diagnosis, analysis etc. to system and device; Website release unit 204 is connected with distributed-network monitoring platform 202, is used to issue monitoring result.Compression ratio unit 2021, degree of supercooling unit 2022, degree of superheat unit 2023 that distributed-network monitoring platform 202 comprises alarm unit 2024, is connected respectively with alarm unit 2024.
Database Systems of the present invention can be inquired about the suction temperature T of the compressor of refrigeration system
S, compressor exhaust temperature T
D, condenser cooling medium liquid fluid line temperature T
L, space temperature T is cooled
B, the compressor air suction pressure P
S, Compressor Discharge Pressure P
D, energy consumption of compressor W
C, the total energy consumption W of system etc., for the efficiency assessment of refrigeration system provides the analysis data.
The statistics of Monitoring Data and calculating comprise the evaporating temperature T of refrigeration system
E, condensation temperature T
C, compressor pressure ratios R, degree of supercooling, the degree of superheat, actual coefficient of refrigerating performance COP, refrigeration system total energy consumption W.
Evaporating temperature T
EWith condensation temperature T
CObtain in the following manner, the pressure-temperature storage of every kind of cold-producing medium in the DBM of distributed-network monitoring platform 202, the compressor air suction pressure P that measures through pressure acquisition unit
SFinding corresponding refrigerant temperature is exactly the evaporating temperature T of system
ESimilarly, Compressor Discharge Pressure P
DCorresponding refrigerant temperature is exactly condensation temperature T
C
Degree of supercooling unit 2022 is used to calculate degree of supercooling, and degree of supercooling is defined as corresponding saturated liquid temperature (the condensation temperature T of condenser condenses pressure
D) and condensator outlet liquid actual temperature T
LDifference.During the refrigeration system normal circulation, the outlet of condenser generally all can have certain degree of supercooling.According to the T that collects
DAnd T
L, calculate degree of supercooling=T in real time
D-T
L, when degree of supercooling was low, the alarm unit 2024 in the monitoring system sent alarm signal.
Degree of superheat unit 2023 is used to calculate the degree of superheat, and the degree of superheat is meant the suction temperature T of refrigerating plant
SThe evaporating temperature T that is higher than the evaporimeter under the corresponding evaporating pressure
EDifference.In order to guarantee the safe handling of compressor, prevent to produce liquid hit phenomenon, require suction temperature a bit than evaporating temperature height, promptly should have certain degree of superheat.According to the T that collects
SAnd T
E, calculate degree of supercooling=T in real time
S-T
E, when the degree of superheat was low, the alarm unit 2024 in the monitoring system sent alarm signal.
The process that coefficient of refrigerating performance correction display unit 104 is obtained actual coefficient of refrigerating performance COP is following:
A) the refrigeration system temperature and pressure parameter that arrives through the monitoring system real-time collecting; Database software through distributed-network monitoring platform is drawn out refrigeration cyclic graph on the pressure heat content figure of corresponding cold-producing medium; Can accurately calculate the theoretical refrigerating capacity and the theoretical compressor power consumption of system, thereby draw theoretical coefficient of performance of refrigerating.
COP (theory)=theoretical refrigerating capacity/theoretical compressor power consumption
B) go out real coefficient of performance of refrigerating through the Kano coefficient calculations:
COP (Kano)=COP (theory) * Kano coefficient
C) calculate actual efficiency coefficient through the applied compression engine efficiency, the degree of accuracy that further improves coefficient of performance of refrigerating:
COP (reality)=COP (Kano) * compressor efficiency
=(theoretical refrigerating capacity/theoretical compressor power consumption) * Kano coefficient * compressor efficiency
D) can also further calculate
Actual refrigerating capacity=compressor actual power loss * COP (reality)
=compressor actual power loss * (calculating refrigerating capacity/calculating compressor power consumption) * Kano coefficient * compressor efficiency
Through showing the improvement of coefficient of refrigerating performance COP, allow the user is directly perceived, science see the energy-saving effect that technological transformation brings.
Room temperature-power consumption correction display unit 103 utilization baseline revised laws calculate, revise room temperature and change the influence to power consumption.The algorithm of revising is through the data acquisition in the validation period, calculates the mean value of the variation of per 1 ℃ of room temperature to the system power dissipation influence.The data that collect are divided equally into some groups, variation of temperature value and corresponding change of power consumption value are contrasted, therefrom draw the changing value that system power dissipation changes corresponding to unit temperature, i.e. kWh/ ℃ of value.These data can be used for extrapolating the warm proportional-non-linear relation that changes system power dissipation in measuring temperature range.The data that validation period is gathered are many more, and the correction factor that calculates is just accurate more.Through revising, after undergoing technological transformation, can simulate the power consumption before not have to transform of refrigeration system under the different room temperature conditions, thereby and the power consumption after the technological transformation compare, obtain the amount of energy saving of reality.For refrigeration system, when the cooled region situation was identical, room temperature was low more, and the power consumption of refrigeration system is just more little.
Room temperature-power consumption correction display unit 103 also can be arranged at monitoring center 105 with coefficient of refrigerating performance correction display unit 104, is realized by same server.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a refrigeration system efficiency is evaluated at line monitoring system, it is characterized in that, comprising:
Data acquisition unit (102) is used to gather temperature, pressure, the power consumption parameter of room temperature and refrigeration system (101);
Room temperature-power consumption correction display unit (103) receives the power consumption that data acquisition unit (102) is gathered, and according to the said power consumption of room temperature correction, and the output of the power consumption that will revise shows;
Coefficient of refrigerating performance correction display unit (104) receives the data that data acquisition unit (102) is gathered, and according to the compressor efficiency revised theory coefficient of refrigerating performance of Kano coefficient and refrigeration system, and the coefficient of refrigerating performance that will revise output demonstration.
2. refrigeration system efficiency according to claim 1 is evaluated at line monitoring system; It is characterized in that; Said room temperature-power consumption correction display unit (103) comprises room temperature-power consumption amending unit, actual power loss display unit; Said room temperature-power consumption amending unit is stored the corresponding power consumption correction value of each room temperature in advance, and said actual power loss display unit is used to show actual power loss.
3. refrigeration system efficiency according to claim 1 is evaluated at line monitoring system; It is characterized in that; Said coefficient of refrigerating performance correction display unit (104) comprises coefficient of refrigerating performance amending unit, actual coefficient of refrigerating performance display unit; Said coefficient of refrigerating performance amending unit is used for the compressor efficiency revised theory coefficient of refrigerating performance according to Kano coefficient and refrigeration system, and said actual coefficient of refrigerating performance display unit is used to show the coefficient of refrigerating performance of having revised.
4. refrigeration system efficiency according to claim 1 is evaluated at line monitoring system, it is characterized in that, said data acquisition unit (102) comprises temperature collecting cell, pressure acquisition unit, power consumption collecting unit.
5. refrigeration system efficiency according to claim 1 is evaluated at line monitoring system; It is characterized in that; Said data acquisition unit (102) is connected with remote monitoring center (105) through internet or GPRS, and said room temperature-power consumption correction display unit (103), coefficient of refrigerating performance correction display unit (104) all are located at said monitoring center (105).
6. refrigeration system efficiency according to claim 5 is evaluated at line monitoring system, it is characterized in that, said room temperature-power consumption correction display unit (103), coefficient of refrigerating performance correction display unit (104) are realized by same server.
7. be evaluated at line monitoring system according to claim 5 or 6 described refrigeration system efficiencies, it is characterized in that said monitoring center (105) also comprises:
Distributed-network monitoring platform (202) is real time operating system, the data base set on the platform of computer operating system, the set up user's application system of unifying, and is used for that user authority management, user basic information are safeguarded, the statistics of Monitoring Data and calculating, early warning processing etc.;
Network communication module (201) is connected with said distributed-network monitoring platform (202), is used for receiving the information of being sent through internet or GPRS by said data acquisition unit (102) and handles;
Service Management instrument (203) is connected with said distributed-network monitoring platform (202), is database management module and the system management facility of go up setting up at said distributed-network monitoring platform (202), is used for management, diagnosis, analysis etc. to system and device;
Website release unit (204) is connected with said distributed-network monitoring platform (202), is used to issue monitoring result.
8. refrigeration system efficiency according to claim 7 is evaluated at line monitoring system; It is characterized in that compression ratio unit (2021), degree of supercooling unit (2022), degree of superheat unit (2023) that said distributed-network monitoring platform (202) comprises alarm unit (2024), is connected respectively with said alarm unit (2024).
9. refrigeration system efficiency according to claim 8 is evaluated at line monitoring system, it is characterized in that, it is on-the-spot that said room temperature-power consumption correction display unit (103), coefficient of refrigerating performance correction display unit (104) all are located at said refrigeration system.
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| CN110741212A (en) * | 2017-04-25 | 2020-01-31 | 艾默生零售解决方案公司 | Dynamic coefficient of performance calculation for refrigeration systems |
| CN110741212B (en) * | 2017-04-25 | 2021-09-07 | 艾默生零售解决方案公司 | Dynamic coefficient of performance calculation for refrigeration systems |
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