2009-10 JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY ANANTAPUR III Year B.Tech. M.E. - II Semester T P C 4 0 4 (9A03604) REFRIGERATION AND AIR CONDITIONING UNIT I – Introduction to Refrigeration: Necessity and applications Unit of refrigeration and C.O.P. – – Different refrigeration methods - Air Refrigeration: Ideal and Actual cycles, Open and Dense air systems problems Refrigeration needs of Air crafts. –- – UNIT II – Vapour compression refrigeration Basic cycle - working principle and essential components of the – plant COP Representation of cycle on T-S and p-h charts Expander vs. Throttling, effect of sub – – – cooling and super heating cycle analysis Actual cycle- Influence of various parameters on system – – performance Construction and Use of P-h charts numerical Problems. – – UNIT III Desirable properties classification of refrigerants used Nomenclature- secondary Refrigerants – – – refrigerants- lubricants Ozone Depletion Global Warming- newer refrigerants. – – UNIT IV Vapor Absorption Refrigeration System description and working of NH3 water system and Li Br – – ( Two shell & Four shell) System -Calculation of max COP. Principle of operation of three Fluid absorption system. UNIT V Working Principle and Basic Components-estimation of motive steam Steam Jet Refrigeration System: required. Principle and operation of: (i) Thermo-electric refrigerator (ii) Vortex tube or Hilsch tube.
2009-10 JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY ANANTAPUR III Year B.Tech. M.E. - II Semester T P C 4 0 4 (9A03604) REFRIGERATION AND AIR CONDITIONING UNIT – I Introduction to Refrigeration: Necessity and applications – Unit of refrigeration and C.O.P. – Different refrigeration methods - Air Refrigeration: Ideal and Actual cycles, Open and Dense air systems –- problems – Refrigeration needs of Air crafts. UNIT – II Vapour compression refrigeration – Basic cycle - working principle and essential components of the plant – COP – Representation of cycle on T-S and p-h charts – Expander vs. Throttling, effect of sub cooling and super heating – cycle analysis – Actual cycle- Influence of various parameters on system performance – Construction and Use of P-h charts – numerical Problems. UNIT III Refrigerants – Desirable properties – classification of refrigerants used – Nomenclature- secondary refrigerants- lubricants – Ozone Depletion – Global Warming- newer refrigerants. UNIT IV Vapor Absorption Refrigeration System – description and working of NH3 – water system and Li Br ( Two shell & Four shell) System -Calculation of max COP. Principle of operation of three Fluid absorption system. UNIT V Steam Jet Refrigeration System: Working Principle and Basic Components-estimation of motive steam required. Principle and operation of: (i) Thermo-electric refrigerator (ii) Vortex tube or Hilsch tube.
R09%20me%20syllabus.docx