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【Daily Question】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, while those who provide correct answers will get 10-15 points. The rewards are valid for two days, and the answers will be announced after that period. Basics of Refrigeration section — Pressure-enthalpy diagrams — Refrigeration calculations (4). I. Overview In refrigeration calculations, pressure-enthalpy diagrams are used; for example, when selecting a throttle valve, it is necessary to know the flow rate of the refrigerant, and when choosing an evaporative cooler, it is necessary to know the heat rejection capacity, among other things. Here are several basic terms used in pressure-enthalpy diagram calculations: 1. Cooling capacity per unit mass, KJ/KG; 2. Cooling capacity per unit volume, KJ/m3; 3. Mass flow rate of the refrigerant, KG/h; 4. Volume flow rate of the refrigerant, m3/h; 5. Condensation heat load per unit mass, KJ/KG; 6. Theoretical compression work per unit mass, KJ/KG; 7. Coefficient of Performance, COP. These 7 parameters will be discussed in the upcoming daily questions related to cooling calculations. Question 1: Based on the refrigeration calculations from the previous three phases, discuss the relationship among the cooling capacity, compression work, and condensation heat. https://attach01.hcbbs.com/forum/201912/21/003130zr7178e81nj764yd.png ============================== High-quality promotion: Daily questions on mechanical equipment – refrigeration sector; their value and significance 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