Central air-conditioning cold source system quota control method and system

Abstract

The invention discloses a central air-conditioning cold source system quota control method and system. The method includes the following steps: (1) a server stores system information in advance; (2) a refrigeration pump adopts a constant pressure difference control method capable of ensuring the worst working point pressure difference; (3) a cooling pump and a cooling tower fan adopt a constant temperature difference control manner and a constant outlet water temperature control manner respectively; (4) a system performs self-learning; (5) the system controls the total electricity consumption and the highest refrigeration water return water temperature after the system performs self-learning. The system includes the server, a controller, an outdoor temperature and humidity sensor, a refrigeration outlet water temperature sensor, a refrigeration return water temperature sensor, a cool outlet water temperature sensor, a cool return water temperature sensor, a refrigeration outlet and return water pressure difference sensor, a remote electricity meter, a water pump frequency converter, and a fan frequency converter. The method and the system can use energy consumption cost designated by a management worker as an operation target to control a cold source of a central air-conditioning, and ensure optimum allocation of refrigerating capacity at the quota.

Description

technical field [0001] The invention relates to central air-conditioning control technology, in particular to a method and system for quota control of a central air-conditioning cold source system. Background technique [0002] The central air-conditioning system is structurally divided into cold source system and terminal equipment. The cold source system includes refrigeration hosts, refrigeration pumps, cooling pumps, cooling towers and other equipment; terminal equipment includes air conditioning units, fresh air units, fan coils and other equipment. [0003] At present, there are many central air-conditioning cold source control systems using different control strategies on the market. Although the control algorithms used by these control systems are different, their essence is basically the same: the operating condition data and related environmental parameters of the air conditioner are obtained through sensors, and then these data are modeled and analyzed to generat...

AI Technical Summary

Problems solved by technology

[0004] The parameters that need to be set in the current central air-conditioning cold source control system generally include ambient temperature and humidity, refrigeration host load, water pump flow, etc. These parameters are directly related to the operating status of the air conditioner but lack intuitive economic meanings, making it difficult for managers to pass The system performs direct parameter setting to control the generation of energy consumption costs, and they often need to configure the operation plan based on past experience

Doing so is often inefficient and deviates from the desired control effects of managers

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