[Mechanical Equipment Technology Edition] Daily Question 20191119: Basics of Refrigeration – Refrigeration Pressure-Humidity Diagrams – Refrigeration Cycles (4)

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This post was last edited by Zhang Xinlin from Binglun Environment on 2019-11-21 at 00:08. [Daily Question] is divided into three sections: Basics of Refrigeration, Equipment Selection Solutions, and Maintenance of Refrigeration Equipment. [Reward Rules] Those who comment on this post will receive 1–3 wealth points; those who give correct answers will receive 10–15 points. The rewards are valid for two days, and the answers will be announced after those two days. Basics of Refrigeration section – Pressure-enthalpy diagram – Refrigeration cycle (4). I. Overview: During a refrigeration cycle, the enthalpy value keeps changing. Under ideal conditions, please answer: (1) During the compression process, does the enthalpy value increase or decrease? (2) During the condensation process, does the enthalpy value increase or decrease? (3) During the throttling process, does the enthalpy value increase or decrease? (4) During the evaporation process, does the enthalpy value increase or decrease? Answer: Increase, Decrease, Unchanged, Increase. ============================== Recommended content: Daily Questions related to mechanical equipment in the field of refrigeration – their value and significance: https://bbs.hcbbs.com/thread-2848974-1-1.html. Internal training materials for screw refrigeration compressor manufacturers: https://bbs.hcbbs.com/thread-2850090-1-1.html