Method for obtaining lift according to state of valve
A water pump and status technology, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems that are difficult to implement and require very high intelligent network management, and achieve the effect of judging real and effective
Active Publication Date: 2018-10-09
SUZHOU IBEST LOW CARBON ENERGY TECH
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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
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[0029] Such as figure 1 with 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 branc...
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The invention provides a method for estimating the lift according to the state of a valve, and belongs to the field of heating and ventilation air conditioners. The method is suitable for a closed type circulating water system. The method is based on the hydrodynamic basic principle and the pipe network resistance calculation basic principle, the state of the intelligent valve is monitored, and the equivalent lift of a water pump can be estimated according to the state of the valve and the relationship between a pipe network series equivalent model, the lift of the water pump, a pipe network and the adjusting valve. The lift of the water pump is estimated on the basis of the method, and each branch of the pipe network can effectively adjust and control the branch. According to the method,each branch can obtain the state of the water pump without wired or wireless communication, so that the calculation complexity is low, the method is suitable for on-line monitoring and estimation andis used for actually controlling the adjusting valve, the control precision of the adjusting valve can be improved, and the stability of the pipe network is enhanced.
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 the adjustment is mainly to ensure the pressure parameter requ...
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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 朱宏耀
Owner SUZHOU IBEST LOW CARBON ENERGY TECH