【Mechanical Equipment Technology Edition】Daily Question 20191113: Basics of Refrigeration – Refrigeration Pressure-Humidity Diagrams – Refrigeration Cycles (2)

Thread Content

This post was last edited by Zhang Xinlin from Binglun Environment on 2019-11-18 at 00:03. [Daily Question] is divided into three sections: fundamentals of refrigeration, equipment selection options, and maintenance of refrigeration equipment. [Reward Rules] Those who comment on this post will receive 1–3 wealth points, while those who provide accurate answers will get 10–15 points; the rewards are valid for two days, and the answers will be announced after those two days. Fundamentals of Refrigeration section – Pressure-enthalpy diagram – Refrigeration cycle (2) I. Overview In a refrigeration cycle, the refrigerant undergoes changes in temperature, pressure, and phase (gas/liquid) as it passes through the four main components. Question: Before entering the compressor, the refrigerant is a low-temperature, low-pressure gas coming from the evaporator. (1) What is the state of the refrigerant after it exits the compressor but before entering the condenser? Answer: High-temperature and high-pressure gas. (2) What is the state of the refrigerant in the condenser? Answer: Gas at medium temperature and high pressure (with sensible heat removed). (3) What is the state of the refrigerant after it passes through the throttle valve but before entering the evaporator? Answer: Liquids at low temperatures and pressures will also produce some vaporization gas. ============================== Premium promotion: Daily questions on mechanical equipment – refrigeration sector; its value and functions: https://bbs.hcbbs.com/thread-2848974-1-1.html. Internal training materials for manufacturers of screw refrigeration compressors related to mechanical equipment: https://bbs.hcbbs.com/thread-2850090-1-1.html