System and method for monitoring operation energy efficiency ratio of water chilling unit

Abstract

The invention relates to a system for monitoring energy efficiency ratio of operation of a water cooler set and a monitoring method thereof. The system comprises a controller for monitoring the energy efficiency ratio of operation of the water cooler set, a local monitoring computer, a remote monitoring computer and a frozen water supply temperature sensor of a cold supply pipe network, a frozen water return temperature sensor of the cold supply pipe network, a frozen water flowmeter of the cold supply network and a power sensor of a refrigeration compressor which are correspondingly connected with the water cooler set; the frozen water supply temperature sensor of the cold supply pipe network, the frozen water return temperature sensor of the cold supply pipe network, the frozen water flowmeter of the cold supply network and the power sensor of the refrigeration compressor are connected with the controller for monitoring the energy efficiency ratio of operation of the water cooler set respectively; and the local monitoring computer and the remote monitoring computer are connected with a signal of the controller for monitoring the energy efficiency ratio of operation of the water cooler set through a convertor I and a convertor II respectively. The system is suitable for the water cooler set of a central air conditioning system using electric power as primary drive energy; and the measured energy efficiency ratio of operation of the water cooler set is suitable for supervising daily energy-saving operation of the water cooler set.

Description

technical field [0001] The invention relates to an energy-saving technology for a central air-conditioning chiller, in particular to a monitoring system and a monitoring method for the energy-efficiency ratio of the chiller in operation. Background technique [0002] With the continuous improvement of people's living standards, central air-conditioning systems are widely used in various buildings, which consume a lot of energy while providing people with a comfortable living environment. The energy consumption of chillers accounts for more than 40% of the energy consumption of central air conditioners, and the cooling efficiency of chillers directly affects the energy consumption of central air conditioners. [0003] Usually, the energy efficiency ratio (EER, Energy Efficiency Ratio) of the chiller is the value measured under the rated working condition when the chiller leaves the factory, and refers to the net cooling capacity generated by unit input power under the rated w...

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Problems solved by technology

In addition, there may be inappropriate selection of the chiller or the mismatch between the chiller and the auxiliary machine, resulting in a low energy efficiency ratio of the actual operation of the chiller compared with the rated energy efficiency ratio. Therefore, the rated energy efficiency ratio can only be used as a measure The reference value of performance, for cent

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