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VAPOR COMPRESSION REFRIGERATION EQUIPMENTS

VAPOR COMPRESSION REFRIGERATION EQUIPMENTS  Equipments of vapor compression systems include compressors, condensers, evaporators & expansion valves. These also include piping and various controls. COMPRESSORS (i)  Reciprocating compressors: used with (a) lower boiling temperature (much below 00C) refrigerants (ii)  low specific volume at – 150C, (c) (pcond – –pevap) > 3.5 atm (  R-22, NH3, etc.)….

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OPEN & HERMETICALLY SEALED UNITS

  https://www.mesubjects.net/wp-admin/post.php?post=5067&action=edit      Refrigeration equipment-2 https://www.mesubjects.net/wp-admin/post.php?post=5065&action=edit      Refrigeration equipment-1 https://www.mesubjects.net/wp-admin/post.php?post=4198&action=edit      MCQ Vapor Compression Refrigeration https://www.mesubjects.net/wp-admin/post.php?post=4194&action=edit       MCQ non-conventional refrigeration OPEN & HERMETICALLY SEALED UNITS Open units are used in large cooling requirements. In this, motor & compressor is connected by a belt drive. RPM of compressor & motor are different. Hermetically units are used in small cooling requirements….

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TYPES OF COOLING TOWERS CLASS NOTES FOR ENGINEERING

TYPES OF COOLING TOWERS CLASS NOTES FOR ENGINEERING  Cooling towers cool the hot water from the condenser for reuse. A cooling tower reduces the cost of water used in condenser. Use of water in the condenser is for condensing refrigerant for medium cooling plants. Cooling tower is a  special type of heat exchanger. In this, hot…

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REFRIGERATION CONDENSERS & EVAPORATORS MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

REFRIGERATION CONDENSERS & EVAPORATORS MULTIPLE CHOICE  QUESTIONS (MCQ) WITH ANSWERS   Condensers and evaporators are phase change equipment’s. Condensers change vapors into liquid on cooling. Evaporators convert liquid into vapors by consuming heat. Dry evaporators are used in domestic units. These ensure that only super heated vapor goes to the compressor for its safety. Flooded evaporators…

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REFRIGERATION COMPRESSORS MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

REFRIGERATION COMPRESSORS MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS  Compressors in refrigeration is the heart of the system. This increases the temperature and pressure of the refrigerant. It enables to loose heat to the surroundings. Basis of compressor selection are pressure rise and volume handled. 1. In refrigeration, compressor in a refrigeration system increases (a) Temperature…