Energy efficiency evaluation method of canned motor pump for heating

Abstract

The invention relates to an energy efficiency evaluation method of a canned motor pump for heating, in particular to an energy utilization efficiency fine evaluation method of a canned motor pump forheating when conveyed liquid is used for cooling a canned motor pump motor. The energy efficiency evaluation method is technically characterized in that the sum of the internal energy increment of thecooling liquid for cooling the motor part of the canned motor pump and the mechanical energy increment of the conveyed liquid serves as effective work, and the efficiency of the canned motor pump forheating is calculated according to the ratio of the effective work in unit time to the input power of the motor. According to the energy efficiency evaluation method, the efficiency of the canned motor pump for heating is directly calculated according to factors such as operation flow, a pump performance curve, a motor efficiency curve and cooling flow channel design of a motor part; the energy efficiency index of the canned motor pump for heating can be evaluated objectively and scientifically; a technical basis is provided for operation state monitoring and safe operation control of the canned motor pump in a municipal heating and ventilation system in actual engineering; and application and popularization of the canned motor pump are facilitated.

Description

technical field [0001] The invention relates to an energy efficiency evaluation method of a shielded electric pump for heating, in particular to a refined evaluation method for the energy utilization efficiency of a shielded electric pump when the conveyed liquid is used to cool the motor of the shielded electric pump, which can be widely used in municipal, petrochemical and other fields Energy efficiency assessment of various liquid pumping systems, as well as equipment condition monitoring and safe operation. Background technique [0002] In a large number of water delivery systems, ordinary centrifugal pumps are usually used as power equipment. However, ordinary centrifugal pumps have large noise and vibration during operation, and their operation reliability is poor. In order to improve the operation stability of the liquid conveying system and greatly reduce the vibration and noise of the equipment, it has become a development trend to replace the ordinary centrifugal ...

AI Technical Summary

Problems solved by technology

However, the traditional calculation method of energy conversion efficiency of canned motors does not consider the energy change of the internal energy of the pumped liquid when evaluating the energy efficiency of canned electric pumps for heating. It can be seen that the traditional calculation method of energy conversion efficiency of canned motors is used to evaluate the energy efficiency of heating pumps. The energy efficiency of canned electric pumps is not accurate

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