技术领域technical field
本发明涉及的是集成冷冻站控制领域，具体涉及一种冷冻站系统中基于环温与压比控制冷却水系统的方法。The invention relates to the field of integrated refrigeration station control, in particular to a method for controlling a cooling water system in a refrigeration station system based on ambient temperature and pressure ratio.
背景技术Background technique
一般建筑物随着季节变化导致空调负荷变化，冬季热负荷一般比夏季冷负荷小，且空调水系统供回水温差夏季一般取5℃，冬季取10℃。在过渡季节或者冬季需要制冷运行，此时冷却水温度偏低，如果不进行控制会产生较低的压比，从而导致冷冻站系统中冷机无法正常启动。Generally, the air-conditioning load of buildings changes with the seasons. The heat load in winter is generally smaller than the cooling load in summer, and the temperature difference between the supply and return water of the air-conditioning water system is generally 5°C in summer and 10°C in winter. Cooling operation is required in the transitional season or winter. At this time, the temperature of the cooling water is low. If it is not controlled, a low pressure ratio will be generated, which will cause the chiller in the freezing station system to fail to start normally.
在现有技术中，压缩机提高压比的方式通常采用旁通方式来控制水冷系统的流量；或者直接采用人工或经验方式进行控制冷却塔和冷却水泵开启数量，主观性占比较大，无法实现自动化控制。且该种控制下的控制精度较差，水系统滞后性大，造成冷机启动困难，甚至无法正常运行。In the existing technology, the way to increase the pressure ratio of the compressor is usually to control the flow of the water cooling system by bypassing; or to directly control the number of cooling towers and cooling water pumps by manual or empirical methods, which is relatively subjective and cannot be realized. automated control. Moreover, the control accuracy under this type of control is poor, and the water system has a large hysteresis, which makes it difficult to start the cold machine, and even cannot operate normally.
发明内容Contents of the invention
根据现有技术的不足，本发明提供一种通过判断环境温度和控制冷机系统中压缩机压比相结合的方式，控制冷却水系统的方法，从而实现冷冻站系统快速运行。According to the deficiencies of the prior art, the present invention provides a method for controlling the cooling water system by judging the ambient temperature and controlling the pressure ratio of the compressor in the refrigeration system, so as to realize the rapid operation of the refrigeration station system.
本发明的技术方案为：一种冷冻站系统中基于环温与压比控制冷却水系统的方法，具体步骤如下：The technical solution of the present invention is: a method for controlling the cooling water system based on the ambient temperature and pressure ratio in the refrigeration station system, the specific steps are as follows:
1)监测冷冻站机组外的环境湿球温度与设定温度的比较，当环境温度大于设定温度时，进行步骤2)；当环境温度小于等于设定温度时，将冷却水的流量调整为0.6倍的额定流量，继续进行步骤3)；1) Monitor the comparison between the ambient wet-bulb temperature outside the refrigeration station unit and the set temperature. When the ambient temperature is greater than the set temperature, proceed to step 2); when the ambient temperature is less than or equal to the set temperature, adjust the cooling water flow to 0.6 times the rated flow, continue to step 3);
2)监测环境湿球温度与设定温度的比较，当环境温度大于等于设定温度时，将冷却水的流量调整为额定流量，持续5-8秒，继续进行步骤4)；当环境温度小于设定温度时，将冷却水的流量调整为(0.6-1.0)倍的额定流量，持续5-8秒，继续进行步骤3)；2) Monitor the comparison between the ambient wet bulb temperature and the set temperature. When the ambient temperature is greater than or equal to the set temperature, adjust the flow of cooling water to the rated flow for 5-8 seconds, and proceed to step 4); when the ambient temperature is less than When setting the temperature, adjust the flow of cooling water to (0.6-1.0) times the rated flow for 5-8 seconds and proceed to step 3);
3)监测冷凝器进水的温度是否小于设定温度，当冷凝器进水的温度小于设定温度时，开启凉水塔一级风扇；当冷凝器进水的温度大于等于设定温度时，开启凉水塔二级风扇；3) Monitor whether the temperature of the water entering the condenser is lower than the set temperature. When the temperature of the water entering the condenser is lower than the set temperature, turn on the first-stage fan of the cooling tower; when the temperature of the water entering the condenser is greater than or equal to the set temperature, turn on Cooling tower secondary fan;
4)监测冷冻水和冷却水实测压差持续大于45％-50％标准流量压差15秒以上，则启动主机；4) Monitor the actual pressure difference between chilled water and cooling water to be greater than 45%-50% of the standard flow pressure difference for more than 15 seconds, then start the main engine;
5)判断压缩机类型，当压缩机类型为磁悬浮离心压缩机时，判断压缩机的运行压比与设定压比的大小，当运行压比大于设定压比时，通过集控系统将冷却塔出水温度目标值设置为26℃后，重新进行步骤1)；当运行压比不大于设定压比时，则将冷冻站系统中冷水机组加载幅度调整到10％至运行结束；当压缩机类型不为磁悬浮离心压缩机时，监测冷水机组的运行压差，当运行压差大于设定压差时，通过集控系统将冷却塔出水温度目标值设置为26℃后，重新进行步骤1)；当运行压差不大于设定压差时，则将冷冻站系统中冷水机组加载幅度调整到10％至运行结束。5) Determine the compressor type. When the compressor type is a magnetic levitation centrifugal compressor, determine the operating pressure ratio of the compressor and the set pressure ratio. When the operating pressure ratio is greater than the set pressure ratio, the centralized control system will cool the After the tower outlet water temperature target value is set to 26°C, proceed to step 1) again; when the operating pressure ratio is not greater than the set pressure ratio, adjust the load range of the chiller in the freezing station system to 10% until the end of operation; when the compressor When the type is not a magnetic levitation centrifugal compressor, monitor the operating pressure difference of the chiller. When the operating pressure difference is greater than the set pressure difference, set the cooling tower outlet water temperature target value to 26°C through the centralized control system, and then repeat step 1) ; When the operating pressure difference is not greater than the set pressure difference, adjust the loading range of the chiller in the freezing station system to 10% until the end of operation.
优选方案如下：The preferred solution is as follows:
步骤1)中的设定温度为22℃。The set temperature in step 1) is 22°C.
步骤2)中的设定温度为28℃。The set temperature in step 2) is 28°C.
步骤3)中的设定温度为25℃。The set temperature in step 3) is 25°C.
步骤5)中的设定压比为1.4。The set pressure ratio in step 5) is 1.4.
步骤5)中的设定压差为0.3MPa。The set pressure difference in step 5) is 0.3MPa.
本发明通过全变频冷冻站系统的逻辑控制，从而实现冷却水系统的逻辑控制，节能效果十分明显，自动化程度高，适于工业推广使用。The invention realizes the logic control of the cooling water system through the logic control of the full frequency conversion refrigeration station system, has obvious energy-saving effect, high degree of automation, and is suitable for industrial popularization and use.
附图说明Description of drawings
图1为本发明的流程示意图。Fig. 1 is a schematic flow chart of the present invention.
具体实施方式detailed description
下面结合图1对本实施例做进一步详细描述，但本发明并不局限于具体的实施例。The present embodiment will be further described in detail below with reference to FIG. 1 , but the present invention is not limited to the specific embodiment.
实施例1：Example 1:
一种冷冻站系统中基于环温与压比控制冷却水系统的方法，具体步骤如下：A method for controlling a cooling water system based on ambient temperature and pressure ratio in a freezing station system, the specific steps are as follows:
1)监测冷冻站机组外的环境湿球温度与22℃的比较，当环境温度大于22℃时，进行步骤2)；当环境温度小于等于22℃时，将冷却水的流量调整为0.6倍的额定流量，继续进行步骤3)；1) Monitor the comparison between the ambient wet bulb temperature outside the freezing station unit and 22°C, and when the ambient temperature is greater than 22°C, proceed to step 2); when the ambient temperature is less than or equal to 22°C, adjust the cooling water flow to 0.6 times Rated flow, continue to step 3);
2)监测环境湿球温度与28℃的比较，当环境温度大于等于28℃时，将冷却水的流量调整为额定流量，持续5秒，继续进行步骤4)；当环境温度小于28℃时，将冷却水的流量调整为(0.6-1.0)倍的额定流量，持续5秒，继续进行步骤3)；2) Monitor the comparison between the ambient wet bulb temperature and 28°C. When the ambient temperature is greater than or equal to 28°C, adjust the flow of cooling water to the rated flow rate for 5 seconds, and proceed to step 4); when the ambient temperature is lower than 28°C, Adjust the flow of cooling water to (0.6-1.0) times the rated flow for 5 seconds and proceed to step 3);
3)监测冷凝器进水的温度是否小于25℃，当冷凝器进水的温度小于25℃时，开启凉水塔一级风扇；当冷凝器进水的温度大于等于25℃时，开启凉水塔二级风扇；3) Monitor whether the temperature of the water entering the condenser is less than 25°C. When the temperature of the water entering the condenser is less than 25°C, turn on the first fan of the cooling tower; when the temperature of the water entering the condenser is greater than or equal to 25°C, turn on the second stage of the cooling tower stage fan;
4)监测冷冻水和冷却水实测压差持续大于45％标准流量压差15秒以上，则启动主机；4) Monitor the actual pressure difference between chilled water and cooling water to be greater than 45% of the standard flow pressure difference for more than 15 seconds, then start the main engine;
5)判断压缩机类型，当压缩机类型为磁悬浮离心压缩机时，判断压缩机的运行压比与1.4的大小，当运行压比大于1.4时，通过集控系统将冷却塔出水温度目标值设置为26℃后，重新进行步骤1)；当运行压比不大于1.4时，则将冷冻站系统中冷水机组加载幅度调整到10％至运行结束；当压缩机类型不为磁悬浮离心压缩机时，监测冷水机组的运行压差，当运行压差大于0.3MPa时，通过集控系统将冷却塔出水温度目标值设置为26℃后，重新进行步骤1)；当运行压差不大于0.3MPa时，则将冷冻站系统中冷水机组加载幅度调整到10％至运行结束。5) Determine the compressor type. When the compressor type is a magnetic levitation centrifugal compressor, determine the operating pressure ratio of the compressor and 1.4. When the operating pressure ratio is greater than 1.4, set the cooling tower outlet water temperature target value through the centralized control system When the operating pressure ratio is not greater than 1.4, adjust the load range of the chiller in the refrigeration station system to 10% until the end of the operation; when the compressor type is not a magnetic levitation centrifugal compressor, Monitor the operating pressure difference of the chiller. When the operating pressure difference is greater than 0.3MPa, set the target value of the outlet water temperature of the cooling tower to 26°C through the centralized control system, and then perform step 1) again; when the operating pressure difference is not greater than 0.3MPa, Then adjust the loading range of the chiller in the freezing station system to 10% until the end of the operation.
本发明通过全变频冷冻站系统的逻辑控制，从而实现冷却水系统的逻辑控制，节能效果十分明显，自动化程度高，适于工业推广使用。The invention realizes the logic control of the cooling water system through the logic control of the full frequency conversion refrigeration station system, has obvious energy-saving effect, high degree of automation, and is suitable for industrial popularization and use.
| Application Number | Priority Date | Filing Date | Title |
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| CN201510054655.1ACN104676834B (en) | 2015-02-02 | 2015-02-02 | The method for controlling cooling water system in refrigeration station system with pressure ratio based on ring temperature |
| Application Number | Priority Date | Filing Date | Title |
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| CN201510054655.1ACN104676834B (en) | 2015-02-02 | 2015-02-02 | The method for controlling cooling water system in refrigeration station system with pressure ratio based on ring temperature |
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| CN201510054655.1AActiveCN104676834B (en) | 2015-02-02 | 2015-02-02 | The method for controlling cooling water system in refrigeration station system with pressure ratio based on ring temperature |
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| CN115696869A (en)* | 2022-11-03 | 2023-02-03 | 深圳鸿富城建设集团有限公司 | Cold volume transmission and distribution optimizing system of data center refrigerating system |
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| TR01 | Transfer of patent right | Effective date of registration:20190125 Address after:Unit 101, No. 56, No. 4, Zaoyuan Road, Licang District, Qingdao City, Shandong Province Patentee after:Qingdao Zhongzeng Energy Technology Co., Ltd. Address before:266000 Room 1205, Xiwang Building, 138 Dunhua Road, North District, Qingdao City, Shandong Province Patentee before:Han Bing |