CN112797526A - Energy-saving industrial circulating water conveying technology with different water supply temperatures and different temperature differences - Google Patents
Energy-saving industrial circulating water conveying technology with different water supply temperatures and different temperature differences Download PDFInfo
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- CN112797526A CN112797526A CN202110149715.3A CN202110149715A CN112797526A CN 112797526 A CN112797526 A CN 112797526A CN 202110149715 A CN202110149715 A CN 202110149715A CN 112797526 A CN112797526 A CN 112797526A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0003—Exclusively-fluid systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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Abstract
The invention discloses a most energy-saving industrial circulating water conveying technology with different water supply temperatures and different temperature differences, which comprises the following steps: s1, acquiring real-time water supply temperature, water return temperature, temperature of the sensitive heat exchange area and pressure of the water supply tail end; s2, continuously reducing the operating frequency of the water pump at the current water supply temperature, increasing the backwater temperature until the temperature of the sensitive heat exchange area rises to the limit value, and stopping frequency modulation; and S3, acquiring the current temperature of supplied water, the temperature difference of supplied and returned water and the operating frequency of the water pump, and uploading the current temperature, the temperature difference of supplied and returned water and the operating frequency of the water pump to a database. The invention provides an industrial circulating water conveying technology which can select different temperature differences according to different water supply temperatures to control the operating frequency of a water pump, so that the change of output flow reaches continuous dynamic balance.
Description
Technical Field
The invention relates to the technical field of industrial or commercial circulating cooling water, in particular to an energy-saving industrial circulating water conveying technology with different water supply temperatures and different temperature differences.
Background
In the circulating cooling water for industrial production of chemical industry, steel, power generation and the like, the circulating cooling water is in open circulation, the cooling water is greatly influenced by the external environment, the temperature difference in each season in one year is very large, even the temperature difference between day and night is very large within one day, the water supply temperature can reach about 33 ℃ when the temperature is highest in summer, and the water supply temperature can be as low as about ten degrees when the temperature is lowest in winter. In the same production load, the effect of heat exchange is greatly different because the supply water temperature is different, and thus the amount of cooling water required on site is different.
On-the-spot circulating water equipment is opened the back and is generally all constant voltage or constant current operation, and after the water supply temperature is low to the uniform temperature, heat exchange efficiency increased, the enterprise generally all can select the manual work to close one or two cooling water pump, reaches the purpose that reduces the flow, for example: 4 circulating water pumps are needed to be started in the period of 4-10 months, and one or two pumps are closed to reduce the flow in the period of 11 months-the next year and 3 months. However, when 2-3-4 stations are opened, the flow rate change is in a step mode rather than a continuous mode, and therefore continuous conveying control cannot be achieved through the flow rate.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention provides an industrial circulating water conveying technology which can select different temperature differences according to different water supply temperatures to control the operating frequency of a water pump, so that the change of output flow reaches continuous dynamic balance.
2. Technical scheme
In order to solve the problems, the technical scheme provided by the invention is as follows:
the most energy-saving industrial circulating water conveying technology with different water supply temperatures and different temperature differences comprises the following steps: s1, acquiring real-time water supply temperature, water return temperature, temperature of the sensitive heat exchange area and pressure of the water supply tail end; s2, continuously reducing the operating frequency of the water pump at the current water supply temperature, increasing the backwater temperature until the temperature of the sensitive heat exchange area rises to the limit value, and stopping frequency modulation; and S3, acquiring the current temperature of supplied water, the temperature difference of supplied and returned water and the operating frequency of the water pump, and uploading the current temperature, the temperature difference of supplied and returned water and the operating frequency of the water pump to a database.
Optionally, the S1 further includes querying whether there is the same water supply temperature in the database by using the real-time water supply temperature as a logic judgment condition; if so, adjusting the supply and return water temperature difference and the water pump running frequency under the supply water temperature, and carrying out frequency conversion control on the water pump so as to enable the real-time supply and return water temperature difference to tend to the supply and return water temperature difference in the database; if not, S2 is executed.
Optionally, the method further includes S4, obtaining the current flow rate of the circulating water, determining the number of the water pumps according to the flow rate of the circulating water, and uploading the number to the database.
Optionally, a control system is included, the control system comprising a circulation line; a plurality of cooling towers which are connected in parallel on the circulating pipeline; the variable frequency water pumps are connected in parallel on the circulating pipeline; a plurality of heat exchange devices connected in parallel on the circulating pipeline; a first temperature sensor for detecting a temperature of the supplied water; the second temperature sensor is used for detecting the return water temperature; the third temperature sensor is used for detecting the temperature of the heat exchange equipment in the sensitive area; the variable frequency water pump, the first temperature sensor, the second temperature sensor and the third temperature sensor are all electrically connected with the controller.
Optionally, the water supply system further comprises a pressure sensor for detecting the pressure at the tail end of the water supply, and the pressure sensor is electrically connected with the controller.
Optionally, the water circulation system further comprises a flow sensor for detecting the flow of the circulating water in the circulation pipeline, and the flow sensor is electrically connected with the controller.
Optionally, the heat exchange equipment is a heat exchanger or a reaction kettle.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) the invention realizes the continuous transmission control of the flow by intelligently controlling the water supply temperature and selecting different water supply and return temperature differences according to different water supply temperatures, not only can realize the dynamic balance of the cooling water quantity required on site, but also can save a large amount of electric power by intelligently controlling the water pump motor in real time.
(2) When the system runs, whether the same water supply temperature is used as a reference or not is preferentially inquired from the database, if so, the same water supply temperature can be directly called to save the calculation time, the control efficiency is improved, if not, the calculation is carried out, the calculated data is uploaded to the database to be used as supplement, the same water supply temperature only needs to be calculated once, and the influence on the control efficiency caused by repeated calculation is avoided.
(3) Judging through the flow, still can satisfying the circulating water flow demand under the condition that reduces one or more water pump work, then the water pump of corresponding quantity of self-closing compares control water pump operating frequency, closes unnecessary water pump more energy saving and consumption, and the water pump operation number of calculating also can be synchronous uploads to the database and uses as subsequent control data.
Drawings
Fig. 1 is a schematic flow chart of an energy-saving industrial circulating water conveying technique for selecting different temperature differences according to different water supply temperatures according to an embodiment of the present invention;
FIG. 2 is a schematic table showing the adjustment and optimization process control of different temperature differences at the same water supply temperature in the present invention;
FIG. 3 is a data summary table of different temperature difference control based on different water supply temperatures according to the present invention;
fig. 4 is a schematic flow chart of a most energy-saving industrial circulating water conveying technique for selecting different temperature differences for different water supply temperatures according to a second embodiment of the present invention;
fig. 5 is a schematic flow chart of a most energy-saving industrial circulating water conveying technique for selecting different temperature differences for different water supply temperatures according to a third embodiment of the present invention;
fig. 6 is a schematic structural diagram of an industrial circulating water control system which selects different temperature differences for different water supply temperatures and is most energy-saving according to a fourth embodiment of the present invention.
1. A circulation line; 2. a cooling tower; 3. a variable frequency water pump; 4. heat exchange equipment; 5. a first temperature sensor; 6. a second temperature sensor; 7. a third temperature sensor; 8. a pressure sensor; 9. a flow sensor.
Detailed Description
For a further understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings 1-6 and examples.
Example one
With reference to fig. 1-3, the most energy-saving industrial circulating water conveying technology with different water supply temperatures and different temperature differences according to the embodiment includes the following steps: s1, acquiring real-time water supply temperature, water return temperature, temperature of the sensitive heat exchange area and pressure of the water supply tail end; s2, continuously reducing the operating frequency of the water pump at the current water supply temperature, increasing the backwater temperature until the temperature of the sensitive heat exchange area rises to the limit value, and stopping frequency modulation; and S3, acquiring the current temperature of supplied water, the temperature difference of supplied and returned water and the operating frequency of the water pump, and uploading the current temperature, the temperature difference of supplied and returned water and the operating frequency of the water pump to a database.
According to the formula Q ═ C × L (T1-T2), Q: producing the required cold quantity; l: circulating water flow rate; c: the specific heat capacity of water; t1: the return water temperature; t2: the temperature of the supplied water; it can be known that under the condition of unchanging cold quantity required by production, the circulating water flow and the temperature difference of supply and return water are in inverse proportion, the circulating water flow is in direct proportion to the running frequency of water pump, when the load required by production is unchanging, the flow can be reduced by enlarging the temperature difference, and the energy-saving effect can be achieved by establishing dynamic balance, and the running frequency of water pump can be controlled by selecting different temperature differences under different water supply temperatures and recording different water supply temperatures in real time, so that the output flow change can reach continuous dynamic balance, and the energy-saving purpose can be achieved by variable flow control, and the problem of selecting different temperature differences of supply and return water according to different water supply temperatures by intelligent control can be solved, so as to implement continuous conveying control of flow, not only the dynamic balance of cooling water quantity required on site, but also by real-time intelligent control of water pump, a large amount of power is also saved.
The most energy-saving industrial circulating water conveying technology with different water supply temperatures selects different temperature differences to realize self-learning through the mode, so that the water supply and return temperature differences and the water pump running frequency under different water supply temperatures are supplemented into the database and are updated in real time to form a more perfect database, so that the subsequent direct calling and use aiming at different water supply temperatures are facilitated, the calculation process of S1-S3 is not needed, and more intelligent control is realized.
Regarding the concept of the temperature of the sensitive heat exchange area, for example, if the temperatures of a plurality of heat exchange areas are changed at the same time, the heat exchange area with the temperature reaching the limit value first is the sensitive heat exchange area, and the temperature of the sensitive heat exchange area is the temperature of the sensitive heat exchange area, so that the most sensitive heat exchange area is in a safe state.
When the pressure at the tail end of the water supply is lower than a safety value, the adjustment of the temperature difference is stopped, and the production safety is ensured.
For example, a circulating water station system of a certain factory consists of 4 circulating water pumps and 3 cooling towers, wherein the rated power of a water pump motor is 110kw, the lift is 50 meters, and the flow rate is 600m3/h。
Assuming that the circulating water flow is adjusted by controlling the operating frequency of the water pump when the water supply temperature is 33 ℃ which is the highest all year round, the circulating water supply and return water temperature difference is changed until the temperature difference reaches the maximum temperature difference during normal production, in the adjusting process, the maximum temperature difference is mainly used as a reference value, and the operating frequency of the water pump can generate certain fluctuation in the actual production process so as to ensure that the supply and return water temperature difference reaches an ideal value as soon as possible.
Example two
With reference to fig. 4, the most energy-saving industrial circulating water conveying technology with different water supply temperatures and different temperature differences according to the present embodiment includes the following steps, compared with the first embodiment: s1, acquiring real-time water supply temperature, water return temperature, temperature of the sensitive heat exchange area and pressure of the water supply tail end, and inquiring whether the same water supply temperature exists in a database by taking the real-time water supply temperature as a logic judgment condition; if so, adjusting the supply and return water temperature difference and the water pump running frequency under the supply water temperature, and carrying out frequency conversion control on the water pump so as to enable the real-time supply and return water temperature difference to tend to the supply and return water temperature difference in the database; if not, go to S2; s2, continuously reducing the operating frequency of the water pump at the current water supply temperature, increasing the backwater temperature until the temperature of the sensitive heat exchange area rises to the limit value, and stopping frequency modulation; and S3, acquiring the current temperature of supplied water, the temperature difference of supplied and returned water and the operating frequency of the water pump, and uploading the current temperature, the temperature difference of supplied and returned water and the operating frequency of the water pump to a database.
When the system runs, whether the same water supply temperature is used as a reference or not is preferentially inquired from the database, if so, the same water supply temperature can be directly called to save the calculation time, the control efficiency is improved, if not, the calculation is carried out, the calculated data is uploaded to the database to be used as supplement, the same water supply temperature only needs to be calculated once, and the influence on the control efficiency caused by repeated calculation is avoided.
For example, a circulating water station system of a certain factory consists of 4 circulating water pumps and 3 cooling towers, wherein the rated power of a water pump motor is 110kw, the lift is 50 meters, and the flow rate is 600m3/h。
Supposing that when the water supply temperature is 18 ℃, the system performs table lookup to judge according to the water supply temperature, and selects the water supply and return temperature difference and the water pump operation frequency when the water supply temperature is 18 ℃ to control.
EXAMPLE III
With reference to fig. 5, the most energy-saving industrial circulating water conveying technology with different water supply temperatures and different temperature differences according to the embodiment includes the following steps: s1, acquiring real-time water supply temperature, water return temperature, temperature of the sensitive heat exchange area and pressure of the water supply tail end, and inquiring whether the same water supply temperature exists in a database by taking the real-time water supply temperature as a logic judgment condition; if so, adjusting the supply and return water temperature difference and the water pump running frequency under the supply water temperature, and carrying out frequency conversion control on the water pump so as to enable the real-time supply and return water temperature difference to tend to the supply and return water temperature difference in the database; if not, go to S2; s2, continuously reducing the operating frequency of the water pump at the current water supply temperature, increasing the backwater temperature until the temperature of the sensitive heat exchange area rises to the limit value, and stopping frequency modulation; s3, acquiring the current temperature of supplied water, the temperature difference of supplied and returned water and the operating frequency of a water pump, and uploading the current temperature, the temperature difference of supplied and returned water and the operating frequency of the water pump to a database; and S4, acquiring the current circulating water flow, judging the number of the working pumps according to the circulating water flow, and uploading the number to a database.
Judging through the flow, still can satisfying the circulating water flow demand under the condition that reduces one or more water pump work, then the water pump of corresponding quantity of self-closing compares control water pump operating frequency, closes unnecessary water pump more energy saving and consumption, and the water pump operation number of calculating also can be synchronous uploads to the database and uses as subsequent control data.
For example, when the water supply temperature is 18 ℃, the system performs judgment by looking up a table according to the water supply temperature, and selects and controls the supply and return water temperature difference, the number of water pump operation units and the water pump operation frequency when the water supply temperature is 18 ℃.
Example four
With reference to fig. 6, the most energy-saving industrial circulating water control system with different water supply temperatures and different temperature differences according to the present embodiment includes a circulating pipeline 1; a plurality of cooling towers 2 connected in parallel to the circulation pipeline 1; the variable frequency water pumps 3 are connected in parallel on the circulating pipeline 1; the heat exchange devices 4 are connected in parallel on the circulating pipeline 1; the cooling towers 2, the variable frequency water pumps 3 and the heat exchange devices 4 are sequentially arranged along the path of the circulating pipeline 1, the variable frequency water pumps 3 are used for controlling circulating cooling water to enter the cooling towers 2, and the heat exchange devices 4 are used for carrying out heat exchange and temperature reduction on the circulating cooling water from the cooling towers 2 for recycling; the first temperature sensor 5 is used for detecting the temperature of supplied water, and the first temperature sensor 5 is arranged on a pipeline between the heat exchange equipment 4 and the variable-frequency water pump 3; the second temperature sensor 6 is used for detecting the temperature of return water, and the second temperature sensor 6 is arranged on a pipeline between the cooling tower 2 and the heat exchange equipment 4; the third temperature sensor 7 is used for detecting the temperature of the heat exchange device 4, the third temperature sensor 7 is only arranged on the heat exchange device 4 which is most sensitive to the change of the water temperature (namely the heat exchange device 4 in the sensitive area), and the adjustment of the temperature difference is stopped as long as the temperature of the heat exchange device 4 reaches the limit value; the variable frequency water pump 3, the first temperature sensor 5, the second temperature sensor 6 and the third temperature sensor 7 are all electrically connected with the controller.
In this embodiment, the heat exchange device 4 is a heat exchanger or a reaction kettle.
The working principle of the most energy-saving industrial circulating water control system with different water supply temperatures by selecting different temperature differences is as follows: the method comprises the steps that a first temperature sensor 5 obtains real-time water supply temperature, a second temperature sensor 6 obtains real-time water return temperature, a third temperature sensor 7 obtains real-time temperature of the heat exchange equipment 4 in the sensitive area, the running frequency of a water pump is continuously adjusted down under the condition that the water supply temperature is kept unchanged, the water return temperature is increased until the temperature of the heat exchange equipment 4 in the sensitive area rises to a limit value, frequency adjustment is stopped, and the water supply temperature, the water supply and return temperature difference and the running frequency of the water pump at the moment are used as standard values of the water supply temperature and are uploaded to a controller so as to be directly called next time.
According to the formula Q ═ C × L (T1-T2), Q: producing the required cold quantity; l: circulating water flow rate; c: the specific heat capacity of water; t1: the return water temperature; t2: the temperature of the supplied water; it can be known that under the condition of unchanging cold quantity required by production, the circulating water flow and the temperature difference of supply and return water are in inverse proportion, the circulating water flow is in direct proportion to the running frequency of water pump, when the load required by production is unchanging, the flow can be reduced by enlarging the temperature difference, and the energy-saving effect can be achieved by establishing dynamic balance, and the running frequency of water pump can be controlled by selecting different temperature differences under different water supply temperatures and recording different water supply temperatures in real time, so that the output flow change can reach continuous dynamic balance, and the energy-saving purpose can be achieved by variable flow control, and the problem of selecting different temperature differences of supply and return water according to different water supply temperatures by intelligent control can be solved, so as to implement continuous conveying control of flow, not only the dynamic balance of cooling water quantity required on site, but also by real-time intelligent control of water pump, a large amount of power is also saved.
As an alternative of the present invention, a pressure sensor 8 for detecting the pressure at the end of the water supply is further included, the pressure sensor 8 is installed on a pipeline between the heat exchange device 4 and the variable frequency water pump 3, and can also be directly installed at the water outlet end of the heat exchange device 4, the pressure sensor 8 is electrically connected with the controller, because the lower the flow rate, the lower the pressure at the end of the water supply is, when the temperature of the water supply is the lowest, the required flow rate is also the least, in the modeling process of adjusting the temperature difference, the end pressure will be lower, and the pressure sensor 8 is used for ensuring that the pressure at the end of the water supply is not lower than the safety value in the process.
As an alternative of the present invention, the present invention further comprises a flow sensor 9 for detecting a flow rate of circulating water in the circulating pipeline 1, wherein the flow sensor 9 is installed on a pipeline between the cooling tower 2 and the heat exchange device 4, and is used for detecting a flow rate flowing from the cooling tower 2 to the heat exchange device 4, the flow sensor 9 is electrically connected to the controller, the flow sensor 9 performs judgment through the flow rate, and can meet a circulating water flow demand under a condition that one or more water pumps are reduced to work, and then the corresponding number of water pumps are automatically turned off, so that energy consumption is saved more compared with controlling an operation frequency of the water pumps and turning off the redundant water pumps, and the calculated number of the water pumps can also be synchronously uploaded to a database to be used as subsequent control data.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (7)
1. Different water supply temperature select different difference in temperature most energy-conserving industrial circulating water transport technology, its characterized in that: the method comprises the following steps:
s1, acquiring real-time water supply temperature, water return temperature, temperature of the sensitive heat exchange area and pressure of the water supply tail end;
s2, continuously reducing the operating frequency of the water pump at the current water supply temperature, increasing the backwater temperature until the temperature of the sensitive heat exchange area rises to the limit value, and stopping frequency modulation;
and S3, acquiring the current temperature of supplied water, the temperature difference of supplied and returned water and the operating frequency of the water pump, and uploading the current temperature, the temperature difference of supplied and returned water and the operating frequency of the water pump to a database.
2. The most energy-saving industrial circulating water conveying technology adopting different water supply temperatures and different temperature differences according to claim 1, is characterized in that: the S1 further includes inquiring whether there is the same water supply temperature in the database with the real-time water supply temperature as a logical judgment condition; if so, adjusting the supply and return water temperature difference and the water pump running frequency under the supply water temperature, and carrying out frequency conversion control on the water pump so as to enable the real-time supply and return water temperature difference to tend to the supply and return water temperature difference in the database; if not, S2 is executed.
3. The most energy-saving industrial circulating water conveying technology adopting different water supply temperatures and different temperature differences according to claim 1 or 2, is characterized in that: and S4, acquiring the current circulating water flow, judging the number of the working pumps according to the circulating water flow, and uploading the number to a database.
4. The most energy-saving industrial circulating water conveying technology adopting different water supply temperatures and different temperature differences according to claim 1, is characterized in that: comprises a control system including
A circulation line;
a plurality of cooling towers which are connected in parallel on the circulating pipeline;
the variable frequency water pumps are connected in parallel on the circulating pipeline;
a plurality of heat exchange devices connected in parallel on the circulating pipeline;
a first temperature sensor for detecting a temperature of the supplied water;
the second temperature sensor is used for detecting the return water temperature;
the third temperature sensor is used for detecting the temperature of the heat exchange equipment in the sensitive area;
the variable frequency water pump, the first temperature sensor, the second temperature sensor and the third temperature sensor are all electrically connected with the controller.
5. The most energy-saving industrial circulating water conveying technology adopting different water supply temperatures and different temperature differences according to claim 4, is characterized in that: the water supply system also comprises a pressure sensor for detecting the pressure at the tail end of the water supply, and the pressure sensor is electrically connected with the controller.
6. The most energy-saving industrial circulating water conveying technology adopting different water supply temperatures and different temperature differences according to claim 4, is characterized in that: the water circulation system also comprises a flow sensor for detecting the flow of circulating water in the circulating pipeline, wherein the flow sensor is electrically connected with the controller.
7. The most energy-saving industrial circulating water conveying technology adopting different water supply temperatures and different temperature differences according to claim 4, is characterized in that: the heat exchange equipment is a heat exchanger or a reaction kettle.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432370A (en) * | 2021-07-05 | 2021-09-24 | 蔚海建 | Circulating water system with balanced supply and demand under different loads and water supply temperatures and control method |
| CN114353289A (en) * | 2021-12-21 | 2022-04-15 | 山东省煤田地质局第四勘探队 | Rock-soil heat exchanger circulating water pump control device and control method |
| CN114577026A (en) * | 2022-03-02 | 2022-06-03 | 湖南万盟环境科技有限公司 | Unmanned on duty circulating water station cloud intelligence accuse economizer system |
| CN114909771A (en) * | 2022-05-09 | 2022-08-16 | 南京亚派软件技术有限公司 | Air conditioner cooling water operation control system |
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2021
- 2021-02-03 CN CN202110149715.3A patent/CN112797526A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432370A (en) * | 2021-07-05 | 2021-09-24 | 蔚海建 | Circulating water system with balanced supply and demand under different loads and water supply temperatures and control method |
| CN114353289A (en) * | 2021-12-21 | 2022-04-15 | 山东省煤田地质局第四勘探队 | Rock-soil heat exchanger circulating water pump control device and control method |
| CN114577026A (en) * | 2022-03-02 | 2022-06-03 | 湖南万盟环境科技有限公司 | Unmanned on duty circulating water station cloud intelligence accuse economizer system |
| CN114577026B (en) * | 2022-03-02 | 2024-03-12 | 湖南万盟环境科技有限公司 | Unmanned on duty circulating water station Yun Zhi accuse economizer system |
| CN114909771A (en) * | 2022-05-09 | 2022-08-16 | 南京亚派软件技术有限公司 | Air conditioner cooling water operation control system |
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