Refrigeration and Air Conditioning By R.S Khurmi

SIZE: 21 MB

575 PAGES

Introduction
1. Définition.
3. Derived Units.
5. S.L Units (International System oj Units).
7. Kilogram.
9, Kelvin.
11. Rules for S.L Units.
13. Force.
15. Tkermodynamic Systems.
17. Stateof a System.
19- Absobite Température.
21. Equality of Température.
23. Gauge Pressure and Absobite Pressure.
25. Standard Température and Pressure.
27. 7ype of Stored Energy.
29. Sensible Heat
31. Spécifie Heat
33. Hb/fc
35. ComparUon of Heat and Work.
37. £aw o/ Thermodynamies.
39. laies o/ JVi/ecf Gas<rÎ.
41. JouU'sLaw.
43. Spécifie Heats ofa Cas.
45. Ratio of Spécifie Heats.
47. Tkermodynamic Processes.
49. Application of First Law of Tkermo~
dynamics to a Non-Jlow Process.
51. Tkermodynamic Cycle.
53. FtoM» Processes.
1.1 Définition
The term Refrigeration may bc defined as the process of lemoving heat from a substance under controlled conditions.
It also includes the process of reducing and maintaining the température of a body below the gênerai température of ils surroundings.
In othcr words, the réfrigération mcans a continued extraction of heat from a body whose température is already below the température of its surroundings. For example.
if some spacc (say in cold storage) is to be kept at - 2°C (273 K), we must continuously extract heat which flows into it duc to leakage through the walls

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