Refrigerating system cooling water energy-saving control method, system and device
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An energy-saving control and refrigeration system technology, applied in heating and ventilation control systems, heating and ventilation safety systems, heating methods, etc. problems such as reduction
Active Publication Date: 2014-08-20
厦门立思节能科技有限公司
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Especially in autumn and winter, the output power of the air-conditioning and refrigeration system drops sharply, but the load of the cooling water pump cannot be reduced accordingly, resulting in a phenomenon of large flow and small temperature difference, wasting electric energy
However, if the frequency conversion control of the cooling water pump is implemented, the energy consumption of the cooling water pump will be reduced, and the cooling effect of the refrigerator will be deteriorated, resulting in a decrease in the efficiency COP of the refrigerator and an increase in the energy consumption of the refrigeration host
At this time, if the control is not good, the gain outweighs the gain or the maximum energy saving effect cannot be achieved. How to adjust the operating frequency of the cooling water pump and balance the energy consumption changes of the cooling water pump and the refrigerator is very important.
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Embodiment 1
[0088] Embodiment 1: Analyze the total power of the system according to the temperature difference between the inlet and outlet of the cooling water pump, that is, the parameters is the temperature difference ΔT between the inlet and outlet of the cooling water pump, and the step interval between it and the adjacent value is 0.2°C.
[0089] When the cooling host load is 72.0±0.2%, the cooling water inlet temperature is 29.0±0.2℃
[0090] The current working condition parameter of the air conditioning system is △T=5.2℃, and the corresponding total system power is 468kW;
[0091] The working condition parameters in the database that meet the current set temperature are as follows:
[0092] △T=5.0℃, the corresponding total system power is 471kW;
[0093] △T=5.2℃, the corresponding total system power is 469kW;
[0094] △T=5.4℃, the corresponding total system power is 467kW;
[0095] △T=5.6℃, the corresponding total system power is 470kW;
[0096] Then the analysis process is...
Embodiment 2
[0100] Embodiment 2: Analyze the total power of the system according to the flow rate of cooling water, that is, the parameters is the cooling water flow G, and the step interval between it and the adjacent value is .
[0101] When the load of the refrigeration main engine is 91.0±0.2%, and the cooling water inlet temperature is 31.0±0.2℃, the current working condition parameter of the air conditioning system is G=506 , the corresponding total system power is 939kW;
[0102] The working condition parameters in the database that meet the current set temperature are as follows:
[0103] G=434 , the corresponding total system power is 942kW;
[0104] G=506 , the corresponding total system power is 938kW;
[0105] G=578 , the corresponding total system power is 934kW;
[0106] Then the analysis process is:
[0107] 1) Set G=506 And the corresponding total system power of 939kW is stored in the database to replace the existing G=506 in the database And the corres...
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Abstract
The invention relates to the technical field of central air conditioner energy saving, in particular to a refrigerating system cooling water energy-saving control method. Under the conditions that the load of a refrigeration main machine is determined, and the cooling water inlet temperature of the refrigeration main machine is determined, the refrigerating system cooling water energy-saving control method comprises the steps that first, working condition parameter data, containing some parameter x, of an air conditioner system are obtained; second, the current system total power W[x] is obtained through calculation according to the working condition parameter data; third, the parameter x and the current system total power W[x] corresponding to the parameter x are stored in a database; fourth, system total power W[x<+>] and W[x<->] corresponding to two working condition parameters x<+> and x<-> respectively are obtained, the x<+> and the x<-> are adjacent to the numerical value of the parameter x, and the W[x<+>] and W[x<->] are compared with the W[x] to obtain an energy-saving working condition parameter; fifth, a corresponding device is adjusted to run according to the energy-saving working condition parameter. The invention further provides a refrigerating system cooling water energy-saving control system and device, and on the premise that it is ensured that the application performance requirement is met, an air conditioner refrigeration main machine and a cooling water pump run with the best overall efficiency, and the total system energy consumption is reduced.
Description
technical field [0001] The invention relates to the technical field of central air-conditioning energy saving, in particular to a method, system and device for energy-saving control of cooling water in a refrigeration system. Background technique [0002] my country is in a period of rapid economic development, and the process of urbanization is gradually accelerating. In order to meet people's work and living needs, a large number of new buildings need to be built. How to achieve sustainable development of buildings and create energy-saving and comfortable working and living environments for people, It is an important problem that the construction industry urgently needs to solve. [0003] With the development of intelligent building technology, automation systems such as central air-conditioning computer control, constant pressure water supply, and intelligent lighting create a comfortable working and living environment for buildings, but also bring huge energy consumption ...
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Application Information
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