Combined cold supply system of cooling towers and water cooling unit and control method thereof

Abstract

The invention discloses a combined cold supply system of cooling towers and a water cooling unit, comprising a refrigeration unit, a heat exchanger, a plurality of cooling towers, a temperature detection device and a control device, wherein the refrigeration unit is used for supplying frozen water for an air conditioner end system; the heat exchanger is used for supplying cooling water for the airconditioner end system; the cooling towers are used for selectively supplying the cooling water for the heat exchanger and the refrigeration unit; the temperature detection device is at least used for detecting the water outlet temperature of the cooling towers and / or the temperature of the cooling water of the heat exchanger and the demand temperature and the water return temperature of the cooling water of the air conditioner end system; and the control device is used for controlling the cooling water of the cooling towers and simultaneously or individually supplying the cooling water for the heat exchanger and the refrigeration unit according to the relationship among all temperatures detected by the temperature detection device. The invention also discloses a control method of the combined cold supply system of the cooling towers and the water cooling unit. A combined cold supply mode of the cooling towers and the water cooling unit is adopted, and therefore, the combined cold supply system has the advantages of higher utilization ratio of the cold supply energy quantity of the cooling towers, longer cold supply time and better energy saving effect.

Description

technical field [0001] The invention relates to a cooling system of a central air-conditioning system of a building, in particular to a cooling system which achieves energy saving and consumption reduction through the combined cooling of a cooling tower and a water chiller, and a control method for the cooling system. Background technique [0002] The cooling tower cooling system (also known as free cooling, free cooling) is a system form used for energy saving and consumption reduction of the refrigeration station of the central air-conditioning system of the building. It is suitable for the cooling demand of the building air-conditioning system in the transition season and winter , and it is impossible or not suitable to use fresh air cooling source. [0003] For example, for a modern office building with a fan coil unit plus a fresh air system, the inner area of ​​the building often requires the air conditioning system to provide cooling throughout the year, and in the tr...

AI Technical Summary

Problems solved by technology

[0020]In short, the cooling tower cooling system commonly used in engineering needs to be further improved in terms of scheme design, operation adjustment, etc.

Images