CN104534917A - Energy-saving control device and method for closed cooling circulation system - Google Patents
Energy-saving control device and method for closed cooling circulation system Download PDFInfo
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- CN104534917A CN104534917A CN201410817907.7A CN201410817907A CN104534917A CN 104534917 A CN104534917 A CN 104534917A CN 201410817907 A CN201410817907 A CN 201410817907A CN 104534917 A CN104534917 A CN 104534917A
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Abstract
The invention discloses an energy-saving control device and method for a closed cooling circulation system. The energy-saving control device comprises a controller, frequency converters, water supply pipe temperature sensors, a water return pipe temperature sensor, an outdoor air temperature and humidity sensor, a water supply pipe pressure sensor, a water return pipe pressure sensor and water pump flowmeters, wherein the frequency converters, the water supply pipe temperature sensors, the water return pipe temperature sensor, the outdoor air temperature and humidity sensor, the water supply pipe pressure sensor, the water return pipe pressure sensor and the water pump flowmeters are connected with the controller. The energy-saving control method includes the steps that (1), the flow of cooling water pumps is adjusted and maintained through PID; (2), the operation number of the cooling water pumps is dynamically adjusted; (3), a cooling water supply temperature setting value is dynamically adjusted, and the rotating speed of a closed type cooling tower fan is controlled. Information of operation parameters of the closed cooling circulation system is collected dynamically, the temperature of the cooling water can be controlled stably, the heat dissipating capacity of heat exchange equipment at the tail end is stable, and energy consumption of the closed cooling circulation system is effectively reduced.
Description
Technical field
The invention belongs to cooling technology field, particularly a kind of energy-saving control device be arranged in enclosed cooling recirculation system.The invention still further relates to the energy-saving control method of this device.
Background technology
Cooling water recirculation system is a common and very important production corollary system, comprises by the interconnective closed cooling tower of pipeline, cooling water pump and end heat exchanger, and it has the features such as system complex, user be many.In some water-deficient area, the cooling of its steam turbine, bearing shell cool, water-cooled generator cooling all adopts enclosed cooling water recirculation system usually, realize the dual purpose of equipment cooling and saving water resource.
At present, the operation of enclosed cooling water recirculation system controls still to have come essentially by manual hand manipulation.Manual hand manipulation's cooling recirculation system has shown many technological deficiencies, such as, when running cooling water recirculation system, can not carry out dynamic conditioning, but run according to the most unfavorable processing condition demand according to the production load of unit.This certainly will cause the cooling water pump of cooling recirculation system and blower fan of cooling tower energy consumption too high, cooling water supply temperature controls unstable, and tail end heat exchange heat dissipation capacity is unstable, brings unnecessary energy consumption waste, and then affect unit and dispel the heat and stable operation.
Summary of the invention
The object of the present invention is to provide a kind of enclosed cooling recirculation system energy-saving control device, and describe the method realizing Energy Saving Control, high to solve enclosed cooling recirculation system energy consumption, cooling water temperature controls unstable, the technical problem of tail end heat exchange heat dissipation capacity instability.
To achieve these goals, the technical scheme that the present invention takes is:
A kind of enclosed cooling recirculation system energy-saving control device, the frequency converter comprising controller and be connected with controller, feed pipe temperature sensor, return pipe temperature sensor, outdoor air Temperature Humidity Sensor, feed pipe pressure sensor, return pipe pressure sensor, pump capacity meter.
Described frequency converter is divided into cooling water pump frequency converter and closed cooling tower fan frequency converter, and cooling water pump frequency converter and pump capacity are scored and be not connected with cooling water pump, and closed cooling tower fan frequency converter is connected with closed cooling tower blower fan.
Described feed pipe temperature sensor, feed pipe pressure sensor are arranged on the pipeline between cooling water pump and end heat exchanger, and return pipe temperature sensor, return pipe pressure sensor are arranged on the pipeline between end heat exchanger and closed cooling tower.
Described outdoor air Temperature Humidity Sensor is installed on the position that sunlight direct irradiation is avoided in outdoor.
Preferred as technical scheme, described feed pipe temperature sensor, return pipe temperature sensor, feed pipe pressure sensor, return pipe pressure sensor, outdoor air Temperature Humidity Sensor, pump capacity meter and the signal type of frequency converter are RS-485 and communicate data signal, and communications protocol is modbus agreement.
Further, a kind of enclosed cooling recirculation system energy-saving control method, comprises following step:
Step one, the quantity difference that calculating return pipe temperature sensor and feed pipe temperature sensor export, the heat exchange amount of enclosed cooling recirculation system is calculated according to the mass flow meters of this quantity difference and cooling water pump, and compare with the heat exchange value of setting, PID regulates the flow maintaining cooling water pump, in adjustment process, detect cooling water pressure, maintain minimum pressure of supply water value;
Step 2, according to the operation number of units of the water pump Real time Efficiency dynamic adjustments cooling water pump of flowmeter, runs in high efficient area to realize cooling water pump;
Step 3, reads value according to outdoor air conditioner Temperature Humidity Sensor, calculates outdoor air wet bulb temperature, dynamic adjustments cooling water supply temperature setting value, controls closed cooling tower rotation speed of fan.
Compared with existing enclosed cooling recirculation system, beneficial effect of the present invention is mainly reflected in:
The present invention, on the basis of original enclosed cooling recirculation system, has installed multiple sensors and frequency converter, has achieved the real-time Dynamic controlling to operational factors such as cooling water flow, supply water temperature and radiating efficiencys.Relative to traditional manual hand manipulation, energy-saving control device of the present invention can be saved the power consumption of cooling water pump and blower fan of cooling tower, reduce the resistance loss of pipeline of cooling water system, reduce the energy consumption consumption of cooling water pump, accurately cooling water supply temperature to control, improve unit operation reliability and stability, comprehensive year power saving rate can reach 30% ~ 40%.
Accompanying drawing explanation
Fig. 1 is that enclosed cooling recirculation system energy-saving control device installs relation schematic diagram.
Description of reference numerals: 1, controller; 2, cooling water pump frequency converter; 3, closed cooling tower fan frequency converter; 4, feed pipe temperature sensor; 5, return pipe temperature sensor; 6, outdoor air Temperature Humidity Sensor; 7, feed pipe pressure sensor; 8, return pipe pressure sensor; 9, pump capacity meter; 10, closed cooling tower; 11, cooling water pump; 12, end heat exchanger.
Detailed description of the invention
For the ease of understanding object of the present invention, technical scheme and effect thereof, now will be elaborated further the present invention in conjunction with the embodiments.
Enclosed cooling recirculation system mainly comprises closed cooling tower 10, cooling water pump 11 and end heat exchanger 12.Its operation principle can simply be described as: the cooling water inputted via end heat exchanger 12 carries out cooling heat transferring by closed cooling tower 10, cooling water temperature is reduced, then be transported to end heat exchanger 12 via cooling water pump 11 and carry out heat exchange, get back to closed cooling tower 10 after taking away the heat that end unit distributes to cool, then enter next circulation.
Existing enclosed cooling recirculation system mostly is manual hand manipulation, there is enclosed cooling recirculation system energy consumption high, and cooling water temperature controls unstable, the technical problem of tail end heat exchange heat dissipation capacity instability.The present embodiment, on the basis of original enclosed cooling recirculation system, provides a kind of enclosed cooling recirculation system energy-saving control device, as shown in Figure 1.
Cooling water pump frequency converter 2, closed cooling tower fan frequency converter 3, feed pipe temperature sensor 4, return pipe temperature sensor 5, outdoor air Temperature Humidity Sensor 6, feed pipe pressure sensor 7, return pipe pressure sensor 8, pump capacity meter 9 that described energy-saving control device comprises controller 1 and is connected with controller 1.
Wherein, every platform cooling water pump 11 respectively connects a cooling water pump frequency converter 2 and pump capacity meter 9, and closed cooling tower fan frequency converter 3 is connected with closed cooling tower blower fan.Feed pipe temperature sensor 4, feed pipe pressure sensor 7 are arranged on the pipeline between cooling water pump 11 and end heat exchanger 12, and return pipe temperature sensor 5, return pipe pressure sensor 7 are arranged on the pipeline between end heat exchanger 12 and closed cooling tower 10.Outdoor air Temperature Humidity Sensor 6 is installed on the position that sunlight direct irradiation is avoided in outdoor.
As preferred embodiment, described feed pipe temperature sensor 4, return pipe temperature sensor 5, feed pipe pressure sensor 7, return pipe pressure sensor 8, outdoor air Temperature Humidity Sensor 6, the signal type of pump capacity meter 9 is RS-485 communication data signal, and communications protocol is modbus agreement.
Described energy-saving control device can realize frequency control while cooling water pump 11 and closed cooling tower blower fan.Described pump capacity meter 9 runs the signal of telecommunication according to cooling water pump 11, as parameters such as electric current, rotating speed, torque, power, in conjunction with characteristic curve of pump, exports cooling water pump 11 real-time traffic and Real time Efficiency.Especially, the signal type of cooling water pump frequency converter 2, closed cooling tower fan frequency converter 3 is RS-485 communication data signal, and communications protocol is modbus agreement.By utilizing cooling water pump frequency converter 2, closed cooling tower fan frequency converter 3 regulates cooling water flow and supply water temperature, meets equipment cooling demand.Meanwhile, the energy consumption of cooling water pump 11 and closed cooling tower blower fan is reduced.Utilize cooling water pump frequency converter 2, closed cooling tower fan frequency converter 3 regulates cooling water flow and the foundation of supply water temperature is feed pipe temperature sensor numerical value, return pipe temperature sensor numerical value, pressure sensor numerical value, outdoor air Temperature Humidity Sensor numerical value.
Realize enclosed cooling recirculation system energy-saving control method, mainly comprise following step:
Step one, calculate the quantity difference that return pipe temperature sensor 5 exports with feed pipe temperature sensor 4, the heat exchange amount of enclosed cooling recirculation system is calculated according to the mass flow meters of this quantity difference and cooling water pump 11, and compare with the heat exchange value of setting, PID regulates the flow maintaining cooling water pump 11, in adjustment process, detect cooling water pressure, maintain minimum pressure of supply water value;
Step 2, according to the operation number of units of the water pump Real time Efficiency dynamic adjustments cooling water pump 11 of pump capacity meter 9, runs in high efficient area to realize cooling water pump;
Step 3, reads value according to outdoor air conditioner Temperature Humidity Sensor 6, calculates outdoor air wet bulb temperature, dynamic adjustments cooling water supply temperature setting value, controls closed cooling tower rotation speed of fan.
Said method can further describe into, controller 1 gathers the signal of cooling water supply pipe temperature sensor 4, return pipe temperature sensor 5, feed pipe pressure sensor 7, pump capacity meter 9, the program of the built-in Energy Saving Control strategy of controller 1 carries out analytical calculation to above-mentioned parameter, regulable control is carried out to cooling water pump frequency converter 2 frequency, and automatically regulate chilled water pump 11 to run number of units, save water pump operation energy consumption.
Controller 1 gathers the signal of cooling water supply pipe temperature sensor 4, outdoor air Temperature Humidity Sensor 6, the program of the built-in Energy Saving Control strategy of controller 1 carries out analytical calculation to above-mentioned parameter, calculate outdoor wet-bulb temperature, dynamic adjustments cooling water supply temperature setting value, controller 1 carries out regulable control according to new cooling water supply temperature setting value to closed cooling tower fan frequency converter 3, saves fan operation energy consumption.
Further describe invention has been above, but the present invention is not limited to above-mentioned embodiment, in the ken that one skilled in the relevant art possesses, can also make a variety of changes under the prerequisite not departing from present inventive concept in conjunction with the embodiments.
Claims (3)
1. an enclosed cooling recirculation system energy-saving control device, it is characterized in that, the frequency converter comprising controller and be connected with controller, feed pipe temperature sensor, return pipe temperature sensor, outdoor air Temperature Humidity Sensor, feed pipe pressure sensor, return pipe pressure sensor, pump capacity meter;
Described frequency converter is divided into cooling water pump frequency converter and closed cooling tower fan frequency converter, and cooling water pump frequency converter and pump capacity are scored and be not connected with cooling water pump, and closed cooling tower fan frequency converter is connected with closed cooling tower blower fan;
Described feed pipe temperature sensor, feed pipe pressure sensor are arranged on the pipeline between cooling water pump and end heat exchanger, and return pipe temperature sensor, return pipe pressure sensor are arranged on the pipeline between end heat exchanger and closed cooling tower;
Described outdoor air Temperature Humidity Sensor is installed on the position that sunlight direct irradiation is avoided in outdoor.
2. enclosed cooling recirculation system energy-saving control device according to claim 1, it is characterized in that, described feed pipe temperature sensor, return pipe temperature sensor, feed pipe pressure sensor, return pipe pressure sensor, outdoor air Temperature Humidity Sensor, pump capacity meter and the signal type of frequency converter are RS-485 and communicate data signal, and communications protocol is modbus agreement.
3. an enclosed cooling recirculation system energy-saving control method, is characterized in that, comprises following step:
Step one, the quantity difference that calculating return pipe temperature sensor and feed pipe temperature sensor export, the heat exchange amount of enclosed cooling recirculation system is calculated according to the mass flow meters of this quantity difference and cooling water pump, and compare with the heat exchange value of setting, PID regulates the flow maintaining cooling water pump, in adjustment process, detect cooling water pressure, maintain minimum pressure of supply water value;
Step 2, according to the operation number of units of the water pump Real time Efficiency dynamic adjustments cooling water pump of flowmeter, runs in high efficient area to realize cooling water pump;
Step 3, reads value according to outdoor air conditioner Temperature Humidity Sensor, calculates outdoor air wet bulb temperature, dynamic adjustments cooling water supply temperature setting value, controls closed cooling tower rotation speed of fan.
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CN105066768A (en) * | 2015-09-09 | 2015-11-18 | 内蒙古包钢钢联股份有限公司 | Pre-cooling system energy saving method for air separation equipment |
CN105157177A (en) * | 2015-09-18 | 2015-12-16 | 广州市设计院 | Method for controlling cooling tower outlet water temperature according to outdoor air state |
CN105674666A (en) * | 2016-03-07 | 2016-06-15 | 上海市城市排水有限公司 | Pump station cooling water circulating system and control method thereof |
CN105841408A (en) * | 2016-05-19 | 2016-08-10 | 中国能源建设集团广东省电力设计研究院有限公司 | Closed-cycle cooling water energy-saving driving system and method |
CN106862527A (en) * | 2016-12-28 | 2017-06-20 | 中瑞新源能源科技(天津)股份有限公司 | A kind of cooling water monitoring system |
CN106979717A (en) * | 2016-11-04 | 2017-07-25 | 深圳达实智能股份有限公司 | The control method and device of cooling tower supply water temperature setting value |
CN109368819A (en) * | 2018-10-12 | 2019-02-22 | 中铁隆昌铁路器材有限公司 | A kind of heating system coolant liquid concentration cooling recirculation system and factory based on same journey pipe network |
CN109945460A (en) * | 2019-03-28 | 2019-06-28 | 中铁第四勘察设计院集团有限公司 | A kind of air conditioning cooling water secondary pump variable volume system and control method |
CN110671950A (en) * | 2019-10-31 | 2020-01-10 | 长沙经济技术开发区祥原动力供应有限公司 | Cooling tower cooling system based on flow change and application thereof |
CN111561440A (en) * | 2020-03-27 | 2020-08-21 | 彩虹(合肥)液晶玻璃有限公司 | High efficiency air compressor machine unit control system |
CN112833611A (en) * | 2021-01-22 | 2021-05-25 | 深圳市奥宇节能技术股份有限公司 | Cooling circulating water system and control method thereof |
CN113701549A (en) * | 2021-09-06 | 2021-11-26 | 浙江尔格科技股份有限公司 | Energy-saving control device and control method for closed-cycle oil-water heat exchange system |
CN114658061A (en) * | 2020-12-22 | 2022-06-24 | 台湾积体电路制造股份有限公司 | Water supply control system of ice water main machine and control method thereof |
CN118226908A (en) * | 2024-05-27 | 2024-06-21 | 中国空气动力研究与发展中心高速空气动力研究所 | Wind tunnel total temperature control device and method for solving quick response problem of large hysteresis system |
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Cited By (17)
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CN105066768A (en) * | 2015-09-09 | 2015-11-18 | 内蒙古包钢钢联股份有限公司 | Pre-cooling system energy saving method for air separation equipment |
CN105157177B (en) * | 2015-09-18 | 2021-12-31 | 广州市设计院 | Method for controlling outlet water temperature of cooling tower according to outdoor air state |
CN105157177A (en) * | 2015-09-18 | 2015-12-16 | 广州市设计院 | Method for controlling cooling tower outlet water temperature according to outdoor air state |
CN105674666A (en) * | 2016-03-07 | 2016-06-15 | 上海市城市排水有限公司 | Pump station cooling water circulating system and control method thereof |
CN105841408A (en) * | 2016-05-19 | 2016-08-10 | 中国能源建设集团广东省电力设计研究院有限公司 | Closed-cycle cooling water energy-saving driving system and method |
CN106979717A (en) * | 2016-11-04 | 2017-07-25 | 深圳达实智能股份有限公司 | The control method and device of cooling tower supply water temperature setting value |
CN106979717B (en) * | 2016-11-04 | 2019-03-19 | 深圳达实智能股份有限公司 | The control method and device of cooling tower supply water temperature setting value |
CN106862527A (en) * | 2016-12-28 | 2017-06-20 | 中瑞新源能源科技(天津)股份有限公司 | A kind of cooling water monitoring system |
CN109368819A (en) * | 2018-10-12 | 2019-02-22 | 中铁隆昌铁路器材有限公司 | A kind of heating system coolant liquid concentration cooling recirculation system and factory based on same journey pipe network |
CN109945460A (en) * | 2019-03-28 | 2019-06-28 | 中铁第四勘察设计院集团有限公司 | A kind of air conditioning cooling water secondary pump variable volume system and control method |
CN110671950A (en) * | 2019-10-31 | 2020-01-10 | 长沙经济技术开发区祥原动力供应有限公司 | Cooling tower cooling system based on flow change and application thereof |
CN111561440A (en) * | 2020-03-27 | 2020-08-21 | 彩虹(合肥)液晶玻璃有限公司 | High efficiency air compressor machine unit control system |
CN114658061A (en) * | 2020-12-22 | 2022-06-24 | 台湾积体电路制造股份有限公司 | Water supply control system of ice water main machine and control method thereof |
CN112833611A (en) * | 2021-01-22 | 2021-05-25 | 深圳市奥宇节能技术股份有限公司 | Cooling circulating water system and control method thereof |
CN113701549A (en) * | 2021-09-06 | 2021-11-26 | 浙江尔格科技股份有限公司 | Energy-saving control device and control method for closed-cycle oil-water heat exchange system |
CN118226908A (en) * | 2024-05-27 | 2024-06-21 | 中国空气动力研究与发展中心高速空气动力研究所 | Wind tunnel total temperature control device and method for solving quick response problem of large hysteresis system |
CN118226908B (en) * | 2024-05-27 | 2024-07-30 | 中国空气动力研究与发展中心高速空气动力研究所 | Wind tunnel total temperature control device and method for solving quick response problem of large hysteresis system |
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