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A Method of Obtaining the Head of a Water Pump According to the State of a Valve

A water pump and state technology, which is applied in the field of HVAC closed circulating water system, can solve problems that are difficult to achieve and require very high intelligence in network management, and achieve the effect of judging real and effective

Active Publication Date: 2021-12-24
SUZHOU IBEST LOW CARBON ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, all control valves in the existing pipeline network use communication methods to obtain the pump status, which requires very high intelligence for the entire network management, and it is difficult to achieve

Method used

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  • A Method of Obtaining the Head of a Water Pump According to the State of a Valve

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Embodiment Construction

[0029] Such as figure 1 and figure 2 As shown in Fig. 1, a method to obtain the pump head through the valve state, according to the basic equation of the hydraulic characteristics of the pipe network and Kirchhoff's pipe network law, the following basic inferences can be obtained:

[0030] H=SG 2 (1)

[0031] Among them, H——pipe network pressure difference;

[0032] S——pipe network impedance;

[0033] G——Pipeline network flow;

[0034] According to fluid mechanics

[0035] Pipelines can be connected in series and in parallel. The impedance calculation formula is as follows:

[0036] The formula for calculating the resistance of series pipes is:

[0037]

[0038] Parallel pipeline impedance calculation formula:

[0039]

[0040] built as attached figure 1 The equivalent pipe network series model shown is that all pipe network impedances except the research pipeline are equivalent to S ot , the impedance of the regulating valve of the research regulating branch...

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Abstract

The invention relates to a method for estimating water head through valve state, belongs to the field of heating, ventilation and air conditioning, and is suitable for a closed circulating water system. This method is based on the basic principle of fluid mechanics and the basic principle of pipe network resistance calculation. Through the monitoring of the state of the intelligent control valve itself, according to the equivalent model of the pipe network in series, the relationship between the pump head, the pipe network and the control valve can be used to estimate the valve state. Get the equivalent head of the pump. Based on the estimation of the pump head by this method, each branch of a pipe network can be effectively adjusted and controlled for this branch. Because the method does not require each branch to obtain the pump status through wired or wireless communication, and has low computational complexity, it is suitable for online monitoring and estimation, and is used for actual control valve control, which can improve the control valve control accuracy and enhance the stability of the pipeline network.

Description

technical field [0001] The invention belongs to the technical field of HVAC closed circulating water systems, and in particular relates to a method for obtaining the lift of a water pump through the state of a valve. Background technique [0002] HVAC is an energy delivery system, and closed-loop heating network water systems and closed-loop air-conditioning water pipe networks are widely used. The pressure distribution of the water system pipe network is significantly different depending on the pipe network pump, pipe network connection form, location, etc. Among them, for a given pipe network, the pressure parameter distribution of the network pipe is mainly closely related to the head of the pipe network pump and the regulating valves distributed throughout the pipe network. The head adjustment of the pipe network pump is usually oriented to the whole network, which is centralized and holistic. The purpose of its adjustment is mainly to ensure the pressure parameter requ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 朱宏耀
Owner SUZHOU IBEST LOW CARBON ENERGY TECH