Secondary network balance system for heat supply metering based on most unfavorable loop differential pressure control

Abstract

Provided is a secondary network balance system for heat supply metering based on the most unfavorable loop differential pressure control. The system comprises a variable speed circulating water pump (1), a heat supply pipe network (2) and heat users (3), wherein flow meters (4) and self-operated differential pressure control valves (5) are installed at the heating power inlets of the heat users (3); a flow meter (4), a self-operated differential pressure control valve (5) and a differential pressure sensor (7) are installed at the heating power inlet of each suspected most unfavorable loop heat user (6); the flow meter (4) and the differential pressure sensor (7) installed on each suspected most unfavorable loop heat user (6) are connected with a data transmitter (8); the data transmitters(8) wirelessly upload flow data and differential pressure data to an upper computer (9); and the upper computer (9) is connected with the variable speed circulating water pump (1) and controls the rotating speed of the variable speed circulating water pump (1). Under the cold operation state, the most unfavorable loop heat users of a circulating system and the minimum circulating differential pressure values delta P required by the most unfavorable loop heat users can be determined conveniently. When the heat supply metering circulating system operates at the variable flow rate, the upper computer (9) controls the variable speed circulating water pump (1) to make the differential pressure of the most unfavorable loop heat users be constant for delta P, the flow and differential pressure requirements of all heat users (3) can be met, need-based heat supply is realized, and the power consumption of the variable speed circulating water pump (1) is greatly saved.

Description

technical field [0001] The invention relates to a heating metering secondary network balance system based on the most unfavorable loop pressure difference control for a centralized heating system. Background technique [0002] In the central heating system that implements heat supply metering, the temperature adjustment device is installed in the residential room of the heat user, which can adjust the circulation flow into the indoor heat dissipation system according to the heat consumed by the user, so as to achieve the purpose of adjusting the room temperature. The circulating water pump of the heat exchange station is for The variable flow operation that meets the needs of heat users also adopts variable speed water pumps, and the constant pressure difference operation is generally used, that is, the constant pressure difference between the supply and return water of the external network. The problems that exist in this method in practical applications are: 1. Due to the d...

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Problems solved by technology

[0003] In order to overcome the problem that the existing heating metering system cannot reasonably set the rotating speed of the circulating water pump and supply heat on demand, the purpose of the present invention is to provide a system based on the most unfavorable loop pressure difference with reasonable structure, convenient operation and stronger implementability. Controlled heating metering secondary network balance system, adjusts the circulating water pump speed according to the actual circulating pressure difference required by the most unfavorable loop heat users, and achieves the purpose of heating on demand. This invention is more suitable for my country's central heating metering system

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