Wealth Post – Daily Question on Refrigeration Compressor Units

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This post was last edited by Zhang Xinlin from Binglun Environment on 2019-11-12 at 21:16. [There are 10 points of wealth in the comments to this post.] I. Introduction: Refrigeration units are widely used in our chemical processes. Based on the type of cooling mechanism, they can be divided into direct refrigeration and indirect refrigeration. 1. Indirect cooling units mainly include: chiller units (5°C water, 7°C water), brine-based cooling units (below zero temperature), and cascade units. 2. Direct cooling units include compression-condensation units; the types of compressors include screw, piston, and centrifugal types. Screw refrigeration compressors are currently the most widely used. II. The purpose of the daily question 1. Since refrigerators are widely used in chemical plants, for newly built facilities it is necessary to consider the selection of cooling equipment solutions, choosing the most suitable option based on the process requirements. For example: direct cooling, indirect cooling, single-stage compression, two-stage compression, cascade refrigeration, and so on. . . When the equipment configurations of different manufacturers are similar, factors such as the safety and reliability of the compressor, initial investment, energy savings to recoup costs, and environmental regulations should be taken into consideration. Therefore, the first goal is to learn to understand the key aspects of equipment selection and configuration comparisons, so as to purchase equipment that offers the best cost-performance ratio. 2. After the equipment is in use, maintenance becomes necessary, just like with cars – refrigeration units also require maintenance over time, including the replacement of filters and refrigerant oil as well as the cleaning of the condenser; this constitutes minor maintenance. Major maintenance involves the disassembly and inspection of the compressor, the replacement of bearings, seals, the repair of rotor geometry, shaft seals, slide valves, sliders, and the chamber itself, among other things. . The compressor is the heart of the entire refrigeration system. Common major system failures include leaks in the heat exchangers, compressor seizure, oil leakage, etc., while minor failures consist of various alarms. . . Temperature, pressure, overcurrent: Equipment maintenance personnel must not only learn how to operate the equipment manually but also possess the relevant theoretical knowledge. Only by combining theory with practice can accidents caused by improper operations be avoided, ensuring the safe and reliable operation of the equipment and preventing disruptions to production. III. Scope of topics for the daily question: 1. Section 1: Maintenance of refrigeration equipment – Structure and functions of refrigeration equipment, analysis of common faults. 2. Section 2: Selection criteria for refrigeration equipment. IV. Conclusion: Please pay attention to the daily questions, as they are like books; some books contain valuable experiences gained over a lifetime. This daily question also contains some useful insights from my brief career in refrigeration. If it’s helpful, please learn from it; if not, feel free to offer your criticism. After all, no one is perfect, so let’s approach learning with a mindset of seeking knowledge and truth! Take the essence and discard the dross! I hope this will be helpful to all the marine enthusiasts. V. Content organization (the last three items offer financial rewards and were published recently)
Basic refrigeration section:
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