CN217109938U - Air conditioner energy efficiency analysis and adjustment system - Google Patents
Air conditioner energy efficiency analysis and adjustment system Download PDFInfo
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- CN217109938U CN217109938U CN202220887500.1U CN202220887500U CN217109938U CN 217109938 U CN217109938 U CN 217109938U CN 202220887500 U CN202220887500 U CN 202220887500U CN 217109938 U CN217109938 U CN 217109938U
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Abstract
The utility model discloses an air conditioner energy efficiency analysis and adjustment system, which comprises an energy efficiency analysis system, a sensor, a condenser, an evaporator, a cooling tower fan and a water pump, wherein the energy efficiency analysis system is applied to an air conditioner and comprises a wireless sensor, an OPC server and a refrigeration host, and the wireless sensor comprises a refrigeration host sensor, a water pump sensor, a cooling tower sensor and an indoor sensor; the wireless sensor is connected with the OPC server in a wireless transmission mode, the wireless sensor transmits the acquired operation parameters to the OPC server, and the OPC server processes and uploads the part of the operation parameters to the refrigeration host. The utility model discloses can carry out the efficiency analysis to air conditioner and refrigerating system, make the evaluation to current air conditioner and refrigerating system's efficiency, then make the system of adjusting to air conditioner and refrigerating system according to the system to current refrigerating system's evaluation. And finally, the air conditioner energy efficiency analysis and adjustment system is realized, wherein the air conditioner and the refrigerating system can operate under the working condition of high energy efficiency ratio.
Description
Technical Field
The utility model relates to an air conditioner refrigeration field, concretely relates to air conditioner efficiency analysis and system of adjusting.
Background
Air conditioning systems are also increasingly widely used along with the development of socioeconomic and scientific technologies, and the air conditioners are increasingly common and indispensable to be used in buildings, industries and various important machine rooms. The energy consumption of air conditioners in building and other scene applications is higher and higher, and the energy efficiency analysis and the adaptation of air conditioning systems are more and more prominent.
The design of the air conditioning system is usually designed only according to the condition parameters of the design load, and the running condition of the air conditioning system under other specific working conditions is rarely considered. However, in actual operation, the load on the air conditioning system is mostly less than the design compliance of the air conditioning system. At present, the air conditioning system is adjusted simply in engineering, and a water pump and a refrigerating unit of the air conditioning system run inefficiently, so that unnecessary energy consumption occurs in a building.
The current air conditioning system generally lacks an energy efficiency analysis system, and a user cannot make correct judgment on the operation energy consumption and the energy efficiency of the air conditioning system in use. Meanwhile, most of the existing air conditioning systems lack the regulation and control capability of the air conditioning systems, so that on one hand, use and maintenance personnel do not know how to control the air conditioning systems; on the other hand it is not known which aspects are to be controlled.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an efficiency analysis and adaptation system that can solve the above-mentioned problem of air conditioner. The energy efficiency of the current air conditioning system can be detected and evaluated in real time, and then corresponding regulation and control measures are given according to the evaluation result, namely, the air conditioning system is adjusted in real time, so that the air conditioner is ensured to be operated under high-efficiency working conditions under various working conditions.
The utility model discloses a realize through following technical scheme: an air conditioner energy efficiency analysis and adjustment system comprises an energy efficiency analysis system, a sensor, a condenser, an evaporator, a cooling tower fan and a water pump, wherein the energy efficiency analysis system is applied to an air conditioner and comprises a wireless sensor, an OPC server and a refrigeration host, and the wireless sensor comprises a refrigeration host sensor, a water pump sensor, a cooling tower sensor and an indoor sensor; the wireless sensor is connected with the OPC server in a wireless transmission mode, the wireless sensor transmits the acquired operation parameters to the OPC server, the OPC server processes the part of the operation parameters and uploads the part of the operation parameters to the refrigeration host, and the refrigeration host analyzes the operation parameters and then makes energy efficiency analysis.
As a preferred technical scheme, the energy efficiency analysis system further comprises a display screen, an input keyboard, a power supply, various wireless sensors, an intelligent gateway and an industrial personal computer, wherein OPC service and energy efficiency analysis and adjustment software is arranged in the industrial personal computer, the wireless sensors comprise a pipeline pressure sensor, an outdoor temperature and humidity sensor, an indoor temperature sensor, a flow sensor, a patch type temperature sensor, a water temperature sensor, a module ammeter and a wind speed sensor, and all the sensors are communicated with the intelligent gateway in a wireless mode.
As the preferred technical scheme, the water pump and the cooling tower are both provided with intelligent electric meters for detecting the running power of the equipment.
An air conditioner energy efficiency analysis and adjustment system comprises a data acquisition device at the lower end and data analysis display equipment at the upper end. The lower end of the air conditioner comprises a pipeline pressure sensor, an outdoor temperature and humidity sensor, an indoor temperature sensor, a flow sensor, a patch type temperature sensor, a water temperature sensor, a module ammeter, an air speed sensor and the like; the system comprises an upper end, an intelligent gateway, a display, a keyboard mouse and an industrial personal computer, wherein OPC service and energy efficiency analysis and adjustment software are arranged in the industrial personal computer. And the various types of parameters are transmitted to the intelligent gateway in real time through the wireless sensor and are uploaded to the industrial personal computer, and the performance of the equipment or the system is judged in real time by generating various evaluation indexes.
The generated evaluation indexes mainly comprise: the efficiency of equipment such as cooling water set, frozen water pump, cooling tower etc. wherein each item parameter calculation is as follows:
(1) the energy efficiency ratio COP of a refrigeration compressor is:
COP＝Q/p1
q is the actual cooling capacity provided by the refrigerator; kW (power of kilowatt)
P1 — real time power of chiller; kW (power of kilowatt)
(2) Efficiency n of the water pump 1 Is composed of
n 1 ＝L*H*ρ*g/P
In the formula: l is the flow rate of the water pump, m 3/h;
h-head of water pump, H;
rho is the density of the working medium conveyed by the water pump, kg/m 3; taking 1000;
g is gravitational acceleration, m/s2, and 9.8 is taken;
p is water pump input power, kW;
(3) the cooling tower efficiency calculation formula is as follows:
η＝(t in -t out )/(t in -t wb )
in the formula: eta-cooling tower efficiency;
t in -the temperature of the cooling water entering the cooling tower;
t out -the temperature of the cooling water exiting the cooling tower;
t wb -outdoor wet bulb temperature
And after various data results are obtained through calculation, displaying the operation energy efficiency of each device and system through a display screen. The display items include: the method comprises the steps of analyzing the running efficiency of a water pump, the heat exchange efficiency of a cooling tower, the heat exchange efficiency of a heat exchanger, the hydraulic unbalance of a chilled water system water collector, analyzing the hydraulic unbalance of the cooling tower, displaying the cold amplitude of the cooling tower and the like.
The energy efficiency adjustment system comprises a wireless router and an RS485 serial port service, and the upper computer system utilizes the RS485 serial port server of the input device to send control parameters to various control systems so as to control and adjust the operating parameters of various devices.
The utility model discloses an energy-conserving effect is: the utility model discloses can realize that efficiency analytic system and air conditioner are adjusted the while operation of system and are realized carrying out the integrated system of effective linkage between two systems to the realization is to the efficiency analysis of air conditioner and the adaptation of air conditioning system, further promotes air conditioning system's automation, intellectuality and is air conditioning system high efficiency and energy saving, and energy-conserving effect is within 10% -20% within the scope. The technical scheme discloses an air conditioner energy efficiency analysis and adjustment system for a centralized air conditioner; the automatic, intelligent and efficient operation of the air conditioning system is realized through the combined operation of the energy analysis system and the air conditioning adjustment system; the energy efficiency analysis of the system and the continuous adjustment of the air conditioning system are simultaneously realized in the process of mutual feedback between the two subsystems. The efficiency of air conditioner operation is effectively improved, and the energy conservation of the operation of the air conditioner equipment is further realized; in addition, the two systems feed back each other, so that the automation and the intellectualization of the systems are improved, and the workload of workers is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a diagram of an air conditioning system;
fig. 2 is a schematic diagram of the structure of the energy efficiency analysis and adjustment system of the present invention;
FIG. 3 is a schematic diagram of the energy efficiency analysis system of the present invention;
fig. 4 is a schematic diagram of the operation of the system of the present invention.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
This specification includes any features disclosed in the appended claims, abstract and drawings, which are, unless expressly stated otherwise, replaceable with other equivalent or similarly purposed alternative features. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
In the description of the present invention, it is to be understood that the terms "one end", "the other end", "the outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The use of terms herein such as "upper," "above," "lower," "below," and the like in describing relative spatial positions is for the purpose of facilitating description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented 90 degrees or at other orientations and the spatially relative descriptors used herein interpreted accordingly.
In the present invention, unless otherwise explicitly specified or limited, the terms "set", "coupled", "connected", "through", "plugged", and the like are to be understood broadly, and may be, for example, a fixed connection, a detachable connection, or an integral body; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
As shown in fig. 2 to 4, the system comprises an energy efficiency analysis system applied to the air conditioner, a sensor, a condenser, an evaporator, a cooling tower fan and a water pump, wherein the energy efficiency analysis system comprises a wireless sensor, an OPC server and a refrigeration host, and the wireless sensor comprises a refrigeration host sensor, a refrigeration host communication card, a water pump sensor, a cooling tower sensor, an indoor sensor, an outdoor sensor, a module electric meter and the like; the wireless sensor is connected with the OPC server in a wireless transmission mode through the intelligent gateway, the wireless sensor transmits the acquired operation parameters to the OPC server, the OPC server processes the part of the operation parameters and uploads the part of the operation parameters to the refrigeration host, and the refrigeration host analyzes the operation parameters and then makes energy efficiency analysis.
Wherein, the efficiency analytic system is still including the display screen, input keyboard, a power supply, intelligent gateway, RS485 server, the display screen, intelligent gateway, the equal electric connection OPC server of power, the display screen is connected to input keyboard, still including the flowmeter, water temperature sensor, SMD temperature sensor, pipeline pressure transmitter, outdoor humiture transmitter, indoor temperature transmitter, module electricity, table air velocity transducer, pipeline pressure sensor, outdoor humiture sensor, indoor temperature sensor, flow sensor, SMD temperature sensor, water temperature sensor, the module ammeter, air velocity transducer all transmits to intelligent gateway through wireless signal in real time, and upload to the industrial computer. The system comprises a refrigeration host, a water pump, an intelligent ammeter, a cold meter, a; an outlet of a fan of the cooling tower is provided with an air speed sensor, a return water pipe of the cooling tower is provided with a temperature sensor, and a fan of the cooling tower is provided with an intelligent ammeter.
The operating condition machine server in fig. 2 is an OPC server.
As shown in fig. 1, the operation principle of the air conditioning system is as follows: the refrigeration compressor generates cold energy through vapor compression refrigeration and generates chilled water after heat exchange of the evaporator, the chilled water is sent to a user side through a chilled water pump, and the user realizes control of indoor temperature and humidity by using the cold and heat of the chilled water. Meanwhile, according to the principle of vapor compression refrigeration, certain heat needs to be discharged outdoors while cold is generated in the refrigeration process of the refrigeration compressor, namely, the condenser exchanges heat with cooling water, and the cooling water is sent to a cooling tower through a cooling water pump to exchange heat with the outdoor environment.
Energy efficiency analysis adapts system analysis index:
(1) refrigeration host energy efficiency analysis
The method comprises the steps of firstly measuring the actual cooling capacity Q of a refrigeration host through a cooling capacity meter of the refrigeration host, and then obtaining the power consumption of a refrigerator according to a wireless intelligent electric meter. Thus, the energy efficiency ratio COP of the refrigeration compressor is as follows:
COP＝Q/p 1
q is the actual cooling capacity provided by the refrigerator; kW (kilo power)
P 1 -real time power of the refrigerator; kW (power of kilowatt)
After the COP of the refrigeration host machine is calculated, the COP is compared with the COP under the similar working condition in the built-in storage of the refrigeration host machine, and when the difference between the actual running COP and the numerical value in the host machine is more than 10%, the evaluation information that the host machine is unqualified when leaving factory or the refrigeration attenuation of the host machine is serious can be given.
After the unit evaluation is completed, the COP of the single-unit and multi-unit combination under different loads is tested according to the respective running degrees of the single-unit and multi-unit combination under different load conditions, the most appropriate start-stop strategy under different load working conditions is obtained, and the highest unit running efficiency and the lowest energy consumption under one cold load working condition are ensured.
And meanwhile, the working condition of the refrigeration host is analyzed according to the measured data, and a proper maintenance suggestion is provided according to the data result, for example, a suggestion that the condenser should be cleaned is provided when the temperature difference of the cooling water is obviously reduced under the same flow and the power of the refrigeration host.
(2) Water pump efficiency analysis
Measuring the water flow of a water pump pipeline through an ultrasonic flowmeter, and obtaining the lift of the water pump through a water pump inlet and outlet pressure sensor; the actual work W of the water pump is
W＝L*H*ρ*g
W-water pump output power in formula, kW
L-flow rate of water pump, m 3 /h；
H-head of water pump, H;
rho-density of working medium conveyed by water pump, kg/m 3 (ii) a Taking 1000;
g-acceleration of gravity, m/s 2 Taking 9.8;
and detecting according to the wireless intelligent electric meter to obtain the input power P of the water pump. Thereby obtaining the energy efficiency ratio n of the water pump 1 Comprises the following steps:
n 1 ＝W/P
w in the formula is water pump output power, kW;
p is water pump input power, kW;
therefore, the single-machine performance of the water pump can be detected, the Q-P curve of the actual operation of a single water pump can be obtained by adjusting the frequency of the water pump, and the Q-P curve of the combined operation of a plurality of water pumps can be obtained by detecting the combined energy efficiency of the water pumps in the same way. And in actual operation, the system compares the data obtained by the previous detection, analyzes the efficiency condition of the current water pump according to the actual working condition requirement, and selects a proper number and scheme of the started water pumps, so that the highest chilled water delivery and distribution energy efficiency and the lowest delivery and distribution energy consumption are ensured.
(3) Cooling tower efficiency analysis
The cooling tower efficiency calculation formula is as follows:
η＝(t in -t out )/(t in -t wb )
in the formula: eta-cooling tower efficiency;
t in -the temperature of the cooling water entering the cooling tower;
t out -the temperature of the cooling water exiting the cooling tower;
t wb -outdoor wet bulb temperature
The efficiency of the cooling tower is generally above 80%, and if eta is lower than 80%, the water treatment capacity of the cooling tower is abnormal. Under the condition that the outdoor wet bulb temperature is constant, the higher the efficiency of the cooling tower is, the smaller the heat exchange temperature difference of the cooling tower is, and the lower the temperature of the cooling water returning machine is.
(4) Air conditioner refrigeration energy efficiency analysis
The air conditioner refrigeration energy efficiency ratio EER (heating energy efficiency ratio COP) refers to the ratio of the refrigeration (heat) quantity to the effective input power when the air conditioner operates in refrigeration (heat). The larger the energy efficiency ratio value is, the smaller the electric power consumed by the air conditioning system in use is.
EER cooling capacity/power Q/W
In the formula: ER-air conditioning system energy efficiency,%;
q-refrigerating capacity of air conditioner, kW
W-Power consumption of air conditioner, kW
The system carries out reasonable energy efficiency analysis on all parts of the current air conditioning system and the total energy efficiency of the system according to the existing evaluation standard.
(II) energy-saving adaptation system
1. Single item continuous adaptation
After the energy efficiency of each device of the system is analyzed and evaluated, if the evaluation index is lower than an expected standard value, the device or the system needs to be adapted.
(1) Operation adaptation of a water pump
And adjusting valves at the inlet and the outlet of the water pump according to the working state point of the water pump to change the working state point of the water pump or change the motor frequency of the water pump, so as to improve the working efficiency of the water pump. Under the premise of ensuring that the indoor environment temperature changes within an allowable range in the adjusting process, firstly, the main machine enables the working state point of the water pump to be located in the high-efficiency area of the working area of the water pump by adjusting the electric adjusting valve of the outlet of the water pump. If the adjustment of the electric adjusting valve can not ensure that the working state point of the water pump is in the high-efficiency area on the premise of ensuring the normal supply of the cooling capacity, the operation frequency of a water pump motor is changed, the electric valve at the outlet of the water pump is adjusted again after the operation frequency is changed, and finally the working state point of the water pump is in or close to the high-efficiency area of the water pump under the condition that the indoor environment temperature is changed within the allowable range. And regulating parameters once every 10 minutes, and tracking the operation effect in real time.
(2) Operation adjustment of refrigerating unit
After the operation efficiency of a certain working condition of the refrigerating unit is tested, the operation efficiency is compared with the unit performance curve to judge whether the refrigerating unit has an adjusting space, such as water supply temperature. The temperature of the supplied water is increased by 1 ℃, the standby unit operates stably, and the indexes of the unit such as cooling capacity, operating efficiency, indoor temperature and the like are observed. It is feasible to control the indoor temperature within a relatively reasonable range. The above steps are repeated until the indoor environment temperature reaches the upper limit value.
(3) Operational adaptation of cooling towers
When the water supply temperature of the cooling water is low and a preset value, the system takes a frequency conversion measure to the cooling tower fan to reduce the rotating speed of the cooling tower fan. And when the electrical frequency of the fan is reduced to a preset value, the operation of the fan is closed, so that the cooling tower can operate efficiently and safely.
And meanwhile, whether the water distribution of the cooling towers is uniform is judged according to the return water temperature measured by the water temperature sensors arranged on the return water pipes of the cooling towers, and when the return water temperature difference between the cooling towers exceeds a set value, the system automatically adjusts an electric adjusting valve of a water supply pipe of the cooling tower, so that the water distribution of the cooling tower is uniform.
(4) Hydraulic balance debugging of each branch of water separator
Analyzing whether each branch is balanced hydraulically according to the return water temperature measured by the water temperature sensor on the return water pipe of each branch of the water separator, generating an analysis result of the unbalance of the water system when the return water temperature difference between the branches is larger than a set value according to a temperature difference value set in an operating condition machine in advance, displaying the analysis result on a display screen through an operating system of an industrial personal computer, and simultaneously adjusting an electric valve arranged on each branch to enable the return water temperature difference to accord with the set value, thereby realizing the hydraulic balance between the branches.
2. Joint adjustment of each device:
different priorities are set for different devices in the system according to the energy consumption conditions of the devices in the system, and EERs of the different devices have different weights in actual program operation. Since the operation conditions of the devices in the system are coupled to each other, changing the operation condition of one device inevitably causes the operation condition of the other device to change. Different priorities of the system for different equipment adjustment conditions necessarily lead to different final overall energy efficiency ratios of the air conditioning system. Therefore, when the system selects the adjustment scheme, the optimal scheme is obtained according to the weight of each device:
in the formula
-total energy efficiency ratio of air-conditioning refrigeration system
EER i -energy efficiency ratio of different devices in air-conditioning refrigeration system
a i -weights corresponding to energy efficiency ratios of different devices in the air-conditioning refrigeration system
(III) the energy efficiency analysis system and the continuous adjustment system are jointly operated
As shown in fig. 4, after the system is adapted by the adaptation operation system, the energy efficiency analysis system performs continuous energy efficiency analysis on the system again within a certain time according to the feedback delay time of the system. And after the efficiency of the system is re-evaluated, the energy efficiency change before and after the system is adjusted again, and if the energy efficiency is increased but the requirement on the energy effect is not met, the host continues to adjust by the previous adjusting strategy. And if the energy efficiency is not increased or even reduced, the system makes adjustment strategies again and reports the adjustment strategies to the operator.
The utility model discloses realized simultaneously and adjusted the efficiency analysis and the system of air conditioning system. The air conditioning system is adjusted by using the analysis result of the energy efficiency analysis system, so that the accuracy of the adjustment efficiency of the air conditioning system is improved. The energy waste of the air conditioning system in the building is effectively reduced, and the automation and the intellectualization of the air conditioning system of the building are increased. The system can realize the annual operation energy saving by 10 to 20 percent according to the estimation.
To sum up, the utility model discloses a to centralized air conditioner based on air conditioner energy efficiency analysis and adaptation system. The automatic, intelligent and efficient operation of the air conditioning system is realized through the combined operation of the energy analysis system and the air conditioning adjustment system. The energy efficiency analysis of the system and the continuous adjustment of the air conditioning system are simultaneously realized in the process of mutual feedback between the two subsystems. The efficiency of air conditioner operation has effectively been improved, has further realized the operation energy-conservation of the equipment of air conditioner. In addition, the two systems feed back each other, so that the automation and the intellectualization of the systems are improved, and the workload of workers is reduced.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.
Claims (3)
1. An air conditioner energy efficiency analysis and adjustment system is characterized in that: the system comprises an energy efficiency analysis system, a sensor, a condenser, an evaporator, a cooling tower fan and a water pump, wherein the energy efficiency analysis system is applied to an air conditioner and comprises a wireless sensor, an OPC server and a refrigeration host, and the wireless sensor comprises a refrigeration host sensor, a water pump sensor, a cooling tower sensor and an indoor sensor; the wireless sensor is connected with the OPC server in a wireless transmission mode, the wireless sensor transmits the acquired operation parameters to the OPC server, the OPC server processes the part of the operation parameters and uploads the part of the operation parameters to the refrigeration host, and the refrigeration host analyzes the operation parameters and then makes energy efficiency analysis.
2. The air conditioner energy efficiency analyzing and adapting system according to claim 1, wherein: the energy efficiency analysis system further comprises a display screen, an input keyboard, a power supply, various wireless sensors, an intelligent gateway and an industrial personal computer, wherein OPC service and energy efficiency analysis and adjustment software is arranged in the industrial personal computer, the wireless sensors comprise a pipeline pressure sensor, an outdoor temperature and humidity sensor, an indoor temperature sensor, a flow sensor, a patch type temperature sensor, a water temperature sensor, a module ammeter and a wind speed sensor, and all the sensors are communicated with the intelligent gateway in a wireless mode.
3. The air conditioner energy efficiency analyzing and adapting system according to claim 1, wherein: and the water pump and the cooling tower are both provided with intelligent electric meters for detecting the running power of the equipment.
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| CN116975502A (en) * | 2023-09-21 | 2023-10-31 | 天津津轨汇海科技发展有限公司 | Energy efficiency monitoring management system for electromechanical equipment of subway train air conditioning system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116975502A (en) * | 2023-09-21 | 2023-10-31 | 天津津轨汇海科技发展有限公司 | Energy efficiency monitoring management system for electromechanical equipment of subway train air conditioning system |
| CN116975502B (en) * | 2023-09-21 | 2023-12-19 | 天津津轨汇海科技发展有限公司 | Energy efficiency monitoring management system for electromechanical equipment of subway train air conditioning system |
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