Configuration method for refrigeration pump operation optimization of chilled water secondary pump system of central air conditioner
A central air-conditioning and operation optimization technology, applied in air-conditioning systems, heating and ventilation control systems, heating and ventilation safety systems, etc., to achieve the effects of wide promotion, high reliability, and reduced system energy consumption
Active Publication Date: 2019-10-29
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology
[0005] The present invention is aimed at the problem of energy-saving optimization of the refrigeration pump of the central air-conditioning refrigeration water secondary pump system. The secondary pump meets the user's chilled water delivery needs, and saves energy by rationally allocating the pressure loss borne by the primary pump and the secondary pump
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[0035] The refrigeration pump operation optimization configuration method of the central air-conditioning chilled water secondary pump system. The central air-conditioning chilled water secondary pump system meets the user’s chilled water delivery needs through the fixed frequency operation of the primary pump and the variable frequency operation of the secondary pump. The pressure loss borne by the pump and the secondary pump achieves the purpose of energy saving, such as figure 1 Shown in the flowchart, the method specifically includes the following steps:
[0036] Such as figure 2 The system schematic diagram of the central air-conditioning chilled water delivery circuit shown in the example, each chiller is equipped with a primary pump, the chilled water generated by the chiller is collected in the primary water supply loop, and then the chilled water is sent to the secondary water supply loop through the secondary pump group circuit, the chilled water in the secondary wat...
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The invention relates to a configuration method for refrigeration pump operation optimization of a chilled water secondary pump system of a central air conditioner. The method comprises the steps thata user's demand for conveying chilled water is satisfied by a first pump with constant-frequency operation and secondary pumps with variable-frequency operation; according to performance of the single first pump and the secondary pumps under rated frequencies, relations between flow rates and lifts and powers of the first pump and the secondary pumps under variable frequencies are determined respectively; a total pressure loss in a chilled water conveying loop and pressure losses which shall be borne by the corresponding secondary pumps in the chilled water conveying loop are determined; withsatisfaction of supply of the flow rates and the lifts as a constraint and with a minimum total power of the secondary pumps as a target, the number of the secondary pumps which are turned on is optimized; and with a minimum sum of a first pump power and a minimum total power of the corresponding secondary pumps during operation of the first pump under the different frequencies as a target, an optimum operation frequency of the first pump and an optimum mode of the number of the secondary pumps under the corresponding frequency are determined. The method disclosed by the invention has the beneficial effects that a ratio of the pressure losses borne by the first pump and the secondary pumps are rational; an energy saving rate is high; universality is high, etc.
Description
technical field [0001] The invention relates to an equipment configuration operation optimization technology, in particular to a refrigeration pump operation optimization configuration method of a central air-conditioning refrigeration water secondary pump system. Background technique [0002] With the progress of society and the improvement of people's living standards, people's requirements for the comfort of air conditioning systems are getting higher and higher, which is accompanied by high energy consumption. In order to enable energy-saving operation of the air-conditioning system, the central air-conditioning chilled water system has undergone changes from the primary pump system for the production and distribution of chilled water to the secondary pump system for the production and distribution of chilled water with their own loops. . At the same time, with the advancement and popularization of frequency control technology, the technology of changing the frequency o...
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IPC IPC(8): F24F5/00F24F11/46F24F11/64F24F11/65F24F11/85F24F11/88
CPCF24F5/0003F24F11/46F24F11/64F24F11/65F24F11/85F24F11/88
Inventor 张莉王龙朱勇军刘岗范进宇
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER