Unpowered phase change cooling system

Abstract

The invention discloses an unpowered phase change cooling system. A primary heat exchanger and a secondary heat exchanger are connected in series to form a closed loop, the closed loop is filled witha proper fluid thermodynamic medium, the thermodynamic medium is heated and evaporated in the primary heat exchanger to generate first-time phase change, after the pressure is increased, the thermodynamic medium enters the secondary heat exchanger, and then heat exchange with the external atmosphere and the cooling water is carried out, so that the thermodynamic medium is condensed into a liquid to generate a second phase change, the condensed thermodynamic medium flows back to the bottom of the primary heat exchanger under the action of differential pressure and gravity, the primary heat exchange period is completed, no external power supply is needed in the working period, and the system is more widely and more reliable to use are improved. According to the invention, a set of small-power external forced water cooling system is still backed up by the system, the system for selecting extreme working conditions, so that the flexibility of application of the system is further improved.

Description

technical field [0001] The invention relates to an unpowered phase-change cooling system, which belongs to the technical field of cooling systems, and in particular relates to an energy-saving cooling device. Background technique [0002] In heavy industries such as iron and steel, non-ferrous metals, etc., the circulating water cooling system for processes mostly adopts the operation mode of constant current and constant pressure central centralized water supply station, and process and equipment cooling users are often hundreds of meters or even thousands of meters away from the central water supply station. Although this water supply mode reduces the floor area, it brings problems such as high water supply pressure and serious excess water supply flow, which inevitably results in a large amount of energy consumption. [0003] The cooling towers of this centralized water supply cooling system have a common feature: the efficiency of the cooling tower is seriously affected ...

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Problems solved by technology

[0004] For most industrial circulating water cooling systems in operation, the above two reasons cause the energy waste rate of the system to be as high as 60%, and some systems even reach as high as 80%.

[0005] In view of the above problems, although there is now an energy-saving operation control system with the patent No. CN201310115024 named "A Circulating Water Temperature Control Energy-Saving Operation System", the system and operation mode provided by this invention are too complicated, the reliability is low, and the equipment The disadvantages of high cost and limited actual energy-saving effect are only suitable for energy-saving transformation of small and medium-sized cooling systems

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