Efficient centrifugal water cooling unit output energy saving adjusting system and method

Abstract

The invention relates to an efficient centrifugal water cooling unit output energy saving adjusting system and method. A centrifugal water cooling unit is provided with a cooling tower and a condenser. The cooling tower and the condenser form a cooling hoop through a water inlet pipe and a water outlet pipe. The adjusting system comprises a variable water pump, a frequency converter, a first temperature sensor, a second temperature sensor and a temperature controller. Both the variable water pump and the first temperature sensor are arranged on the water inlet pipe. The second temperature sensor is arranged on the water outlet pipe. The input end of the temperature controller is connected with the output end of the first temperature sensor and the output end of the second temperature sensor. The input end of the frequency converter is connected with the output end of the temperature controller. The output end of the frequency converter is connected with the control end of the variable water pump. Compared with the prior art, the frequency converter is controlled through temperature difference, accordingly the flow of the water cooling loop is changed, a good energy saving effect is saved, consumption of cooled water can be obviously lowered, meanwhile the rotating speed is lowered, and the service life of the water pump and a motor can be prolonged.

Description

technical field [0001] The invention relates to the field of energy-saving control, in particular to a high-efficiency energy-saving adjustment system and method for output energy of a centrifugal chiller. Background technique [0002] With the shortage of energy resources in the world and the increasing environmental pressure brought about by global warming, saving energy and protecting the environment have become major issues that cannot be ignored by countries all over the world. The energy consumption of the central air-conditioning system accounts for more than half of the energy consumption of buildings, of which the energy consumption of equipment such as cooling water pumps accounts for a large part. [0003] The working condition of the centrifugal chiller depends not only on the characteristics of the centrifugal compressor, but also on the working condition of the condenser and evaporator. Only by keeping the condenser, evaporator and centrifugal compressor well m...

AI Technical Summary

Problems solved by technology

[0005] like figure 2 As shown, in the past, the flow of cooling water was provided by quantitative water pumps. When the load changes, the temperature difference between the inlet and outlet of cooling water often changes greatly, and there is a small temperature difference phenomenon. This is the defect of quantitative water pumps.

Images