Control method, device and air-conditioning system for increasing/decreasing machine of air-conditioning host

Abstract

The invention discloses an air conditioner host machine increase and decrease control method and device as well as an air conditioner system. The air conditioner host machine increase and decrease control method comprises the following steps that a calculation model of the operation power and the refrigeration / heating quantity of a host machine is obtained; the practical load demand Q0 of the air conditioner tail end is obtained; the corresponding first operation power Ni when the refrigeration / heating quantity of the single host machine is Q0 / i is respectively calculated according to the calculation model, wherein the i is a natural number not equal to zero, and is 1, 2, 3 to T, and the T is the total host machine number; the first total power consumed when i host machines are started under the first operation power Ni is respectively calculated, so that T first total powers are obtained; the host machine number corresponding to the minimum first total power in the T first total powers is determined to be the operation number of the practical host machines. The practical operation number of the host machines is controlled according to the principle that the power sum of the parallel connection host machines is the minimum, and the goal of maximizing the energy saving effect is realized, so that the energy saving effect of a cold station reaches the maximization.

Description

technical field [0001] The invention relates to the field of air-conditioning control, in particular to a control method, device and air-conditioning system for the increase and decrease of air-conditioning host machines. Background technique [0002] The energy consumption of the mainframe accounts for about 60% to 70% of the energy consumption of the cold station system. The energy-saving operation of the mainframe is very important to the improvement of the energy efficiency of the entire system. In most air-conditioning systems, multiple hosts operate in parallel. Therefore, the actual running number of hosts and the load rate of each host determine the energy consumption of the entire parallel group of hosts. [0003] The inherent performance curves of different brands and types of hosts are different, and the highest energy efficiency point is not necessarily near the full load condition. However, in the traditional air-conditioning control system, in order to simpli...

AI Technical Summary

Problems solved by technology

However, in the traditional air-conditioning control system, in order to simplify the complexity of the control, the control method usually adopted is: when the online host cannot meet the cooling / heating load demand of the air-conditioning terminal, the next host is turned on, that is, the host as much as possible Running at full load, this method is obviously not the most energy-efficient

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