Energy-saving optimized control system and method for refrigerator room

Abstract

The invention relates to an energy-saving optimized control system and an energy-saving optimized control method for a refrigerator room. The energy-saving optimized control system comprises an industrial control computer, a flow sensor, a temperature sensor, an outdoor temperature and humidity sensor, a three-phase active power transmitter, a water pump frequency converter and a cooling tower fan frequency converter which are connected with a programmable logic controller respectively, wherein the programmable logic controller communicates with the industrial control computer through an industrial Ethernet; and an RS485 communication interface module is connected with a water cooling unit and communicates with the industrial control computer through a ModBus protocol. A mathematical model of relationships between the energy consumption and running parameters of each equipment in the refrigerator room is established to regulate the running state of each equipment in combination with real-time refrigeration loads and weather parameters, thereby fulfilling the aim of making the lowest running energy consumption of the whole refrigerator room at the premise of meeting the refrigeration loads.

Description

Technical field: [0001] The invention relates to an energy-saving system and method, in particular to a refrigeration machine room system. Background technique: [0002] In the energy consumption of the entire building, the energy consumption of the air conditioning system occupies a large proportion, generally around 40-50%. In the energy consumption of the air conditioning system, the refrigeration room equipment (including chillers, chilled water pumps, cooling water pumps and cooling towers) accounts for about 60-70%. In an office building using electric cooling, the annual electricity consumption of the air-conditioning cold source (refrigeration machine room)-chillers, freezing and cooling water pumps, and cooling towers accounts for 30-35% of the annual electricity consumption of the entire building. [0003] The cooling operation process in the air conditioning system is: the chiller prepares chilled water at a certain temperature, sends it to the terminal equipment...

AI Technical Summary

Problems solved by technology

[0005] In the existing technology, some methods may be feasible under stable laboratory conditions, but in the actual operation process, since all the equipment in the refrigeration room is in continuous operation, the cooling load and weather parameters will also change at any time, which will As a result, the actual values ​​of the collected parameters are not regular, and the above-mentioned method cannot be used to optimize the operating conditions of the equipment in the refrigeration room, and may even produce the opposite effect. Therefore, in actual operation, the above-mentioned method is used to find the highest operating efficiency of the equipment in the entire refrigeration room. operating point is unrealistic

In addition, in the prior art, the cooling tower heat transfer model is not established at the same time, which will inevitably reduce the effect of its energy consumption control

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