CN103615866A - Method and device for measuring unit electricity consumption of ultra-efficient refrigeration station - Google Patents
Method and device for measuring unit electricity consumption of ultra-efficient refrigeration station Download PDFInfo
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Abstract
The invention relates to an energy consumption measurement technology and aims at providing a method and a device for measuring unit electricity consumption of an ultra-efficient refrigeration station. The device comprises a refrigerating unit, a chilled water pump, a cooling water pump and a cooling tower fan. Temperature sensors are respectively installed on a water supply pipe and a water return pipe of the refrigerating unit, a flow sensor is installed on the water supply pipe or the water return pipe of the refrigerating unit, and an intelligent electric meter is installed on the power supply side of a refrigeration station device. The method and the device has the advantages that the energy consumption of a measurement system is synthesized from the perspective of the system; considering the difference of demands for refrigeration capacity of the refrigeration station of users at different time periods and the influence of external environment change on the system operation efficiency, a concept of energy-saving unit electricity consumption is provided, the energy-saving effect during actual operation can be reflected scientifically and accurately, and the energy-saving effect evaluation can be performed.
Description
Technical field
The present invention relates to energy consumption measurement technology, particularly electric unit consumption measuring method and the device of a kind of ultra high efficiency refrigeration station.
Background technology
In energy-saving and emission-reduction industry, it is very necessary that the enterprise energy consumption science of carrying out is measured accurately.Existing metering method is mostly the mode of direct interior total energy consumption difference of employing a period of time, has ignored the effect of the fluctuation of system operating load and environmental change, lacks the concept of efficiency.
Dui refrigeration station system is saved energy and reduce the cost in transformation process, because each several part exists complicated coupling influence, therefore, merely the independent energy consumption that reduces each equipment might not realize best energy-saving effect, correct way is to consider the various factor ，Dui refrigeration stations that affect system energy consumption to carry out system energy efficiency optimal control.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes electric unit consumption measuring method and device that deficiency of the prior art provides a kind of ultra high efficiency refrigeration station.The whole refrigeration station system of take is main body, by considering the energy consumption of its difference ，Dui refrigeration station system of energy consumption the different refrigerating capacity demand in the situation that, measures and calculates.
For technical solution problem, solution of the present invention is:
The electric unit consumption measuring method that the invention provides a kind of ultra high efficiency refrigeration station, comprises the following steps:
(1) measure the following operational factor of refrigeration station: supply water temperature T
g, return water temperature T
h, unit: ℃; The flow L of chilled water in feed pipe or return pipe, unit: m
3/ h;
(2) at refrigeration station run duration, choose representative a period of time, as electric unit consumption measurement time t, unit: h; Described representative referring to: refrigeration station operation conditions is good in the selected time period, and can residing normal operating condition of representative system most of the time;
(3) according to following formula, calculate the accumulative total cold Qd， unit of refrigeration station within this period: degree or kWh:
Qd＝∫K·L·(T
h-T
g)dt (1)
Wherein K is hot water proportion and specific heat correction factor, and its numerical value is: 4.2 * 10
6, unit: J/ (m
3℃);
(3) by refrigeration station equipment supply side intelligent electric meter reading, obtain system accumulative total electric weight Ed， unit in the identical period: degree or kWh;
According to following formula, calculate the electric unit consumption Eq of refrigeration station:
Eq=Ed/Qd
(2)
Electricity unit consumption Eq i.e. the required power consumption of the unit's of generation cold, unit: kWh/kWh.
The present invention further provides for realizing the electric unit consumption measurement mechanism of the ultra high efficiency refrigeration station of preceding method, its current consuming apparatus comprises refrigeration unit, chilled water pump, cooling water pump and blower fan of cooling tower; On the water supply line of refrigeration unit and water return pipeline, temperature sensor is housed respectively, on the water supply line of refrigeration unit or water return pipeline, flow sensor ， refrigeration station equipment supply side is housed intelligent electric meter is housed; This device also comprises electric unit consumption measuring instrument, electricity unit consumption measuring instrument has display screen, supply water temperature measuring-signal interface, return water temperature measuring-signal interface, flow measurement signal interface, power consumption measuring-signal interface and host computer communication interface, by cable, is connected to respectively each temperature sensor, flow sensor, intelligent electric meter and host computer.
In the present invention, in-built electrical unit consumption measurement module in described electric unit consumption measuring instrument, can calculate the required power consumption of acquisition generation unit cold according to the refrigeration station operational factor recording and following formula:
Qd＝∫K·L·(T
h-T
g)dt (1)
Eq=Ed/Qd
(2)
In formula, each symbol is: supply water temperature T
g, return water temperature T
h, unit: ℃; The flow L of chilled water in feed pipe or return pipe, unit: m
3/ h; At refrigeration station run duration, choose representative a period of time, as electric unit consumption measurement time t, unit: h; Described representative referring to: refrigeration station operation conditions is good in the selected time period, and can residing normal operating condition of representative system most of the time; The accumulative total cold Qd， unit of refrigeration station within this period: degree or kWh:K are hot water proportion and specific heat correction factor, and its numerical value is: 4.2 * 10
6, unit: J/ (m
3℃); By refrigeration station equipment supply side intelligent electric meter reading, obtain system accumulative total electric weight Ed， unit in the identical period: degree or kWh; The electric unit consumption Eq of refrigeration station, i.e. the required power consumption of the unit's of generation cold, unit: kWh/kWh.
In the present invention, the display screen of described electric unit consumption measuring instrument can show data in real time, and can realize both-way communication with host computer.
Compared with prior art, beneficial effect of the present invention is:
The present invention is from the angle of system, the energy consumption of Integrated Measurement System integral body.Simultaneously, consider that user is in the difference of the confession refrigeration requirement of different time sections Nei Dui refrigeration station, and external environment condition changes the impact for running efficiency of system, the concept of proposition employing electricity-saving unit consumption, in agreement Measuring Time section, produce the power consumption of specific refrigerating effect Suo Hao refrigeration station equipment.The energy consumption that measures by this way refrigeration station more science reflects the energy-saving effect of realistic operation conditions exactly, is convenient to carry out energy-saving effect assessment and accounting.
Accompanying drawing explanation
Tu1Wei refrigeration station system schematic.
Fig. 2 is described electric unit consumption measuring instrument schematic diagram.
Each Reference numeral is: 1,3 be respectively back feed pipe temperature sensor, 2 is flow sensor, 4 is intelligent electric meter, and 5 is refrigeration unit, and 6 is refrigeration station equipment supply side, 7 is chilled water pump, 8 is cooling water pump, and 9 is cooling tower, and 10 is water knockout drum, 11 is water collector, and 12,13,14 are wisdom valve; 15 is electric unit consumption measuring instrument; 16 is display screen, and 17,18 are respectively supply and return water temperature measuring-signal interface, and 19 is flow measurement signal interface, and 20 is power consumption measuring-signal interface, and 21 is host computer communication interface.
The specific embodiment
Below in conjunction with accompanying drawing and the specific embodiment, the present invention is described in further detail:
First it should be noted that, the present invention relates to computer technology in a kind of application in control technology field.In implementation procedure of the present invention, can relate to the application of software function module.Applicant thinks, as reading over application documents, accurate understanding is of the present invention realize principle and goal of the invention after, in conjunction with existing known technology in the situation that, those skilled in the art can use the software programming technical ability of its grasp to realize the present invention completely.Aforementioned software functional module comprises but is not limited to: electric unit consumption measurement module etc., and this category of all genus that all the present patent application files are mentioned, applicant will not enumerate.
The electric unit consumption measurement mechanism of the ultra high efficiency refrigeration station in the present embodiment, its current consuming apparatus comprises refrigeration unit 5, chilled water pump 7, cooling water pump 8 and blower fan of cooling tower; On the water supply line of refrigeration unit and water return pipeline, temperature sensor 3,1 is housed respectively, flow sensor 3 ， refrigeration station equipment supply sides is housed on the water supply line of refrigeration unit intelligent electric meter 4 is housed; This device also comprises electric unit consumption measuring instrument 15, electricity unit consumption measuring instrument 15 has display screen, supply water temperature measuring-signal interface 17, return water temperature measuring-signal interface 18, flow measurement signal interface 19, power consumption measuring-signal interface 20 and host computer communication interface 21, by cable, is connected to respectively temperature sensor 3,1, flow sensor 2, intelligent electric meter 4 and host computer.The display screen of electricity unit consumption measuring instrument 15 can show data in real time, and can realize both-way communication with host computer.
In-built electrical unit consumption measurement module in electricity unit consumption measuring instrument 15, can calculate the required power consumption of acquisition generation unit cold according to the refrigeration station operational factor recording and following formula.
Based on aforementioned means, the measuring method of the electric unit consumption of ultra high efficiency refrigeration station, comprises the following steps:
(1) measure the following operational factor of refrigeration station: supply water temperature T
g, return water temperature T
h, unit: ℃; The flow L of chilled water in feed pipe or return pipe, unit: m
3/ h;
(2) at refrigeration station run duration, choose representative a period of time, as electric unit consumption measurement time t, unit: h; Described representative referring to: refrigeration station operation conditions is good in the selected time period, and can residing normal operating condition of representative system most of the time;
(3) according to following formula, calculate the accumulative total cold Qd， unit of refrigeration station within this period: degree or kWh:
Qd＝∫K·L·(T
h-T
g)dt (1)
Wherein K is hot water proportion and specific heat correction factor, and its numerical value is: 4.2 * 10
6, unit: J/ (m
3℃);
(3) by refrigeration station equipment supply side intelligent electric meter reading, obtain system accumulative total electric weight Ed， unit in the identical period: degree or kWh;
According to following formula, calculate the electric unit consumption Eq of refrigeration station:
Eq=Ed/Qd
(2)
Electricity unit consumption Eq i.e. the required power consumption of the unit's of generation cold, unit: kWh/kWh.
What more than enumerate is only specific embodiments of the invention.Obviously, the invention is not restricted to above embodiment, can also have many distortion.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention, all should think protection scope of the present invention.
Claims (3)
1. the electric unit consumption measuring method of ultra high efficiency refrigeration station, is characterized in that, comprises the following steps:
(1) measure the following operational factor of refrigeration station: supply water temperature T
g, return water temperature T
h, unit: ℃; The flow L of chilled water in feed pipe or return pipe, unit: m
3/ h;
(2) at refrigeration station run duration, choose representative a period of time, as electric unit consumption measurement time t, unit: h; Described representative referring to: refrigeration station operation conditions is good in the selected time period, and can residing normal operating condition of representative system most of the time;
(3) according to following formula, calculate the accumulative total cold Qd， unit of refrigeration station within this period: degree or kWh:
Qd＝∫K·L·(T
h-T
g)dt (1)
Wherein K is hot water proportion and specific heat correction factor, and its numerical value is: 4.2 * 10
6, unit: J/ (m
3℃);
(3) by refrigeration station equipment supply side intelligent electric meter reading, obtain system accumulative total electric weight Ed， unit in the identical period: degree or kWh;
According to following formula, calculate the electric unit consumption Eq of refrigeration station:
Eq=Ed/Qd
(2)
Electricity unit consumption Eq i.e. the required power consumption of the unit's of generation cold, unit: kWh/kWh.
2. for realizing the electric unit consumption measurement mechanism of the ultra high efficiency refrigeration station of method described in claim 1, its current consuming apparatus comprises refrigeration unit, chilled water pump, cooling water pump and blower fan of cooling tower; It is characterized in that, on the water supply line of refrigeration unit and water return pipeline, temperature sensor is housed respectively, on the water supply line of refrigeration unit or water return pipeline, flow sensor ， refrigeration station equipment supply side is housed intelligent electric meter is housed; This device also comprises electric unit consumption measuring instrument, electricity unit consumption measuring instrument has display screen, supply water temperature measuring-signal interface, return water temperature measuring-signal interface, flow measurement signal interface, power consumption measuring-signal interface and host computer communication interface, by cable, is connected to respectively each temperature sensor, flow sensor, intelligent electric meter and host computer;
In-built electrical unit consumption measurement module in described electric unit consumption measuring instrument, can calculate the required power consumption of acquisition generation unit cold according to the refrigeration station operational factor recording and following formula:
Qd＝∫K·L·(T
h-T
g)dt (1)
Eq=Ed/Qd
(2)
In formula, each symbol is: supply water temperature T
g, return water temperature T
h, unit: ℃; The flow L of chilled water in feed pipe or return pipe, unit: m
3/ h; At refrigeration station run duration, choose representative a period of time, as electric unit consumption measurement time t, unit: h; Described representative referring to: interior refrigeration station operation conditions of selected time period is good and can represent residing normal operating condition of its most of the time; The accumulative total cold Qd， unit of refrigeration station within this period: degree or kWh:K are hot water proportion and specific heat correction factor, and its numerical value is: 4.2 * 10
6, unit: J/ (m
3℃); By refrigeration station equipment supply side intelligent electric meter reading, obtain system accumulative total electric weight Ed， unit in the identical period: degree or kWh; The electric unit consumption Eq of refrigeration station, i.e. the required power consumption of the unit's of generation cold, unit: kWh/kWh.
3. device according to claim 2, is characterized in that, the display screen of described electric unit consumption measuring instrument can show data in real time, and can realize both-way communication with host computer.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105116723A (en) * | 2015-06-26 | 2015-12-02 | 上海电器科学研究院 | Energy consumption reduction assessment algorithm used for demand response |
| CN105972756A (en) * | 2016-05-19 | 2016-09-28 | 无锡汇能达科技有限公司 | Method for testing COP value of central air conditioner |
| CN105972710A (en) * | 2016-04-28 | 2016-09-28 | 广州南鸥电子科技有限公司 | Multifunctional environment-friendly energy-saving ice storage movable air conditioner and refrigerating method thereof |
| CN112611141A (en) * | 2020-12-24 | 2021-04-06 | 上海能誉科技股份有限公司 | Energy-saving control method and system for refrigeration host and computer readable storage medium |
| CN113803642A (en) * | 2021-09-18 | 2021-12-17 | 深圳市富能新能源科技有限公司 | Compressed gas distribution method and system |
| CN115507613A (en) * | 2021-06-22 | 2022-12-23 | 青岛海尔电冰箱有限公司 | Control method of ice making device and ice making device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116723A (en) * | 2015-06-26 | 2015-12-02 | 上海电器科学研究院 | Energy consumption reduction assessment algorithm used for demand response |
| CN105972710A (en) * | 2016-04-28 | 2016-09-28 | 广州南鸥电子科技有限公司 | Multifunctional environment-friendly energy-saving ice storage movable air conditioner and refrigerating method thereof |
| CN105972756A (en) * | 2016-05-19 | 2016-09-28 | 无锡汇能达科技有限公司 | Method for testing COP value of central air conditioner |
| CN112611141A (en) * | 2020-12-24 | 2021-04-06 | 上海能誉科技股份有限公司 | Energy-saving control method and system for refrigeration host and computer readable storage medium |
| CN112611141B (en) * | 2020-12-24 | 2021-11-02 | 上海能誉科技股份有限公司 | Energy-saving control method and system for refrigeration host and computer readable storage medium |
| CN115507613A (en) * | 2021-06-22 | 2022-12-23 | 青岛海尔电冰箱有限公司 | Control method of ice making device and ice making device |
| CN115507613B (en) * | 2021-06-22 | 2024-03-12 | 青岛海尔电冰箱有限公司 | Control method of ice making device and ice making device |
| CN113803642A (en) * | 2021-09-18 | 2021-12-17 | 深圳市富能新能源科技有限公司 | Compressed gas distribution method and system |
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