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Method for determining optimal operation number of draught fans of open type ventilation system of large lamp bulb tubular pump unit

A technology of light bulb through-flow pump and ventilation system, applied in cooling/ventilation devices, electromechanical devices, electric components, etc., can solve the problems of high ventilation cost, excessive ventilation, serious problems, etc.

Inactive Publication Date: 2014-05-14
YANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the operating environment temperature is lower than the design temperature most of the time, and the motor temperature is far lower than the design operating temperature most of the time, the phenomenon of excessive ventilation is serious and the ventilation cost is high

Method used

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  • Method for determining optimal operation number of draught fans of open type ventilation system of large lamp bulb tubular pump unit
  • Method for determining optimal operation number of draught fans of open type ventilation system of large lamp bulb tubular pump unit
  • Method for determining optimal operation number of draught fans of open type ventilation system of large lamp bulb tubular pump unit

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Embodiment Construction

[0036] Adopt technical scheme of the present invention, below in conjunction with attached Figures 2 to 4 The present invention will be further described with examples, but examples should not be construed as limiting the present invention.

[0037]The main parameters of large bulb tubular pump unit I: the rated power of the motor is 2200kW, the motor efficiency is 95.5%, the rated speed is 125r / min, the rated voltage, current and phase resistance are 6.6kV, 183A, 0.26Ω respectively, excitation voltage, current They are 200V and 120A respectively, and the inner diameter of the stator is 3.1m. The flow of a single pump is 33.4m 3 / s.

[0038] (1) The temperature of the stator winding of the motor when the ventilation volume is designed

[0039] The ventilation ambient air and the design temperature of the stator winding are 40°C and 100°C respectively. After calculation, the design ventilation flow is 4.1m 3 / s, the temperature of the stator winding changes with the ambie...

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Abstract

The invention belongs to the field of operation optimization and energy conservation of engineering systems, and discloses a method for determining the optimal operation number of draught fans of an open type ventilation system of a large lamp bulb tubular pump unit. The cooling function of water currents inside a runner outside a lamp bulb shell of a motor of the large lamp bulb tubular pump unit is considered, and through the heat exchange calculation on ventilation cooling, the relation between the operation temperature of the motor and the environment air temperature and between the operation temperature of the motor and the ventilation quantity is researched, and the design flow of the draught fans is determined reasonably; on the premise that the motor is not overheated, the lowest cost of ventilation is the target, and the operation number of fixed-speed draught fans is optimized; the economical efficiency of the optimization mode of the operation number of the fixed-speed draught fans is calculated and analyzed. The open type ventilation system of the large lamp bulb tubular pump unit operates according to the optimal number of the draught fans, so that not only is the ventilation requirement of the unit met, but also the aim of saving the operation expenses is achieved, and any equipment is not needed. The method can be applied to optimal operation of the open type ventilation system of the large lamp bulb tubular pump unit. According to the calculation result of an example, the ventilation operation expenses can be saved by about 12%, and greater economical benefits are achieved.

Description

technical field [0001] The invention relates to a method for optimizing the operation of the ventilation system of a pump unit, in particular to a method for determining the optimal number of fans in the open ventilation system of a large bulb tubular flow pump unit, belonging to the field of energy-saving engineering system operation optimization. Background technique [0002] The large-scale bulb tubular pump unit has a smooth and smooth inlet and outlet water flow, small hydraulic loss, and low pump station cost. It is a more reasonable pump unit form for low-lift pump stations. The motor of the large-scale bulb tubular pump unit is located in the almost airtight bulb body, and the temperature of the water flow outside the bulb body is about 3-5°C lower than the ambient temperature. For the open ventilation and cooling system, the heat generated by the motor is transferred to the ventilation cooling air and the water flow outside the bulb shell through a certain temperatu...

Claims

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Application Information

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IPC IPC(8): H02K9/04
Inventor 仇宝云申剑冯晓莉
Owner YANGZHOU UNIV
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