Syllabus ,R AND AC ,R & AC , RAC , Question papers, Answers, important Question REFRIGERATION & AIR CONDITIONING, R13 Regulation, B.Tech , JNTUK,Syllabus, download,
INTRODUCTION TO REFRIGERATION: Necessity and applications – unit of refrigeration and C.O.P. – Mechanical refrigeration – types of ideal cycles of refrigeration. air refrigeration: bell coleman cycle - open and dense air systems – refrigeration systems used in air crafts and problems.
VAPOUR COMPRESSION REFRIGERATION: Working principle and essential components of the plant – simple vapour compression refrigeration cycle – COP – representation of cycle on T-S and p-h charts – effect of sub cooling and super heating – cycle analysis – actual cycle influence of various parameters on system performance – use of p-h charts – numerical problems.
REFRIGERANTS – Desirable properties – classification - refrigerants used – nomenclature – ozone depletion – global warming. VCR SYSTEM COMPONENTS: Compressors – general classification – comparison – advantages and disadvantages. condensers – classification – working principles evaporators – classification – working principles expansion devices – types – working principles.
VAPOR ABSORPTION SYSTEM: Calculation of maximum COP – description and working of NH3 – water system and Li Br –water ( Two shell & Four shell) System, principle of operation three fluid absorption system, salient features. STEAM JET REFRIGERATION SYSTEM: Working Principle and basic components. principle and operation of (i) thermoelectric refrigerator (ii) vortex tube.
INTRODUCTION TO AIR CONDITIONING: Psychometric properties & processes – characterization of sensible and latent heat loads –– need for ventilation, consideration of infiltration – load concepts of RSHF, GSHFproblems, concept of ESHF and ADP temperature. Requirements of human comfort and concept of effective temperaturecomfort chart –comfort air conditioning – requirements of industrial air conditioning, air conditioning load calculations.
AIR CONDITIONING SYSTEMS: Classification of equipment, cooling, heating humidification and dehumidification, filters, grills and registers, fans and blowers. heat pump – heat sources – different heat pump circuits.