Method for manually adjusting static hydraulic balance of centralized heating pipe network based on impedance

Abstract

The invention discloses a method for manually adjusting the static hydraulic balance of a centralized heating pipe network based on impedance, which is divided into two processes: rough adjustment andfine adjustment. The coarse adjustment process can be carried out in a non-operational state of a heating system. Based on the results of the pipe network hydraulic calculation, the calculated impedance of a static regulating valve required for static balance is calculated, and the opening is adjusted to be corresponding to the impedance and locking is performed; and the fine adjustment is carried out in such a way that in any operation state of the heating system, results are tested according to users' flow, users needing to fine adjustment are screened according to users' imbalance rate, the impedance of the users is recalculated according to a set formula, and the regulating value is readjusted to a valve opening corresponding to the impedance. The method has no special requirements for operating conditions, and is simple and convenient in operation, and the adjustment process does not affect the normal operation of the pipe network.

Description

technical field [0001] The invention relates to the field of central heating, in particular to the field of hydraulic balance of the central heating system. Background technique [0002] The hydraulic imbalance of central heating pipe network includes static hydraulic imbalance and dynamic hydraulic imbalance. Static hydraulic imbalance is due to the mismatch between the impedance of each user branch and its resource pressure, resulting in a mismatch between its flow and its load; dynamic hydraulic imbalance is due to changes in the hydraulic conditions of the system or certain user branches or main pipelines The local adjustment of the network leads to the phenomenon that the user flow does not match its load. These two imbalance phenomena often exist at the same time in the same central heating system, so corresponding technical measures should be taken to eliminate them. Usually, the static hydraulic imbalance is solved by the static hydraulic balance method, and the dy...

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Problems solved by technology

The common limitation of these methods is that the static adjustment process must be carried out in the dynamic operating state of the pipeline network, and the pipeline network must be in a specific operating condition suitable for the adjustment method before and after adjustment, so as to determine the flow through the regulating valve. At the same time, these adjustment methods have different limitations: some calculation processes are complicated and require special calculation software to complete, such as scheduled planning method, computer method, simulation analysis method, simulation resistance method, etc.; some measurement And the adjustment process is complicated, and some control valves need to be adjusted repeatedly, such as proportional method, compensation method, resistance coefficient method, etc.; some adjustment processes are completed by experience and cannot adapt to larger systems, such as simple and fast methods

The root cause of most current hydraulic imbalances in heating systems lies in the limitations of traditional static hydraulic balance methods

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