Control method of central air-conditioning machine room under energy consumption limit

Abstract

The invention discloses a central air conditioning machine room control method under energy consumption limit. Firstly, energy consumption limit information is set; after a system receives the energy consumption limit, the system predicts according to an energy consumption limit operating state, and outputs an energy consumption limit answer; within the time from the preprocessing beginning time to the energy consumption limit beginning time, a building is in an energy storage state or a maintenance state; after the energy consumption limit beginning time is reached, the building is in an energy consumption limit state; a total power capable of being distributed at present is calculated; the total power distributed at present is distributed among a central air conditioning unit, a freezing water pump, a cooling water pump and a cooling tower; and after the energy consumption limit beginning time is reached, the cooling water pump, the cooling tower, the freezing water pump and the unit are recovered to a non-energy consumption limit state for operation. The method can control the energy consumption of a central air conditioning system of the building in a limit range to meet the comfort requirements as far as possible; on the one hand, the power supply pressure of a power grid can be relieved; and on the other hand, the influence on the operation of the building is reduced to guarantee ordered operation of economic activities.

Description

technical field [0001] The invention relates to a control method for a central air-conditioning machine room under an energy consumption limit, and belongs to the technical field of air-conditioning system control. Background technique [0002] With the development of urbanization and industrialization in our country, the scale and number of public buildings and industrial buildings are increasing, and the energy consumption of buildings is constantly rising. The central air conditioner is a large energy consumer in buildings, generally occupying 40% to 60% of the building's energy consumption. When the power supply capacity cannot meet the electricity demand, if the central air-conditioning system of the building can control the energy consumption within the limit and meet the comfort requirements as much as possible, on the one hand, it can reduce the power supply pressure of the power grid, and on the other hand, it can reduce the impact on building operation , to ensure...

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Problems solved by technology

However, planned power outages generally require a rigid power outage plan to be made several days in advance based on forecasts of grid power supply capacity and electricity demand, and there is a possibility of excessive power outages. Secondly, during the planned power outage, the central air-conditioning system of the building is completely shut down, and building functions are greatly affected

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