multi stage vapour compression refrigeration systems ppt

�x������- �����[��� 0����}��y)7ta�����>j���T�7���@���tܛ�`q�2��ʀ��&���6�Z�L�Ą?�_��yxg)˔z���çL�U���*�u�Sk�Se�O4?׸�c����.� � �� R� ߁��-��2�5������ ��S�>ӣV����d�`r��n~��Y�&�+`��;�A4�� ���A9� =�-�t��l�`;��~p���� �Gp| ��[`L��`� "A�YA�+��Cb(��R�,� *�T�2B-� ͐�~��٥u)h�J5��(�l��*GE35�2$�L�s�.�鲩$j*$'�.8��y� No public clipboards found for this slide, Attended Tirumala Engineering College, Jonnalagadda(Post), Narasaraopet, PIN-522601(CC-NE). 0000005572 00000 n The vapor-compression uses a circulating liquid refrigerant as the medium (usually R134a) which absorbs and removes heat from the space to be cooled and subsequently rejects that heat elsewhere.The figure depicts a typical, single-stage vapor-compression system. 1. Multi-Stage Vapour Compression Refrigeration Systems 1:08 PM • The performance of single stage systems shows that these systems are adequate as long as the temperature difference between evaporator and condenser (temperature lift) is small. The Linde and the Claude gas liquefaction systems are presented as the most interesting cryogenic processes, as well as the heat exchangers used in those processes. �ꇆ��n���Q�t�}MA�0�al������S�x ��k�&�^���>�0|>_�'��,�G! 0000024281 00000 n You can change your ad preferences anytime. �I�¦a@�j���``j�a��D����ZF��`�`��8P�&���@Z �e�!�����D�A�c Vapor-compression uses a circulating liquid refrigerant as the medium which absorbs and removes heat from the space to be cooled and subsequently rejects that heat elsewhere. Such systems are compound multistage systems, cascade systems and multi evaporator systems. Single shell type 1. 0000003151 00000 n xref startxref 3. ChemE 260 Vapor-Compression Refrigeration Cycles & Enhanced VCR Cycles Dr. William Baratuci Senior Lecturer Chemical Engineering Department University of Washington – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 7763ba-MzIwY endstream endobj 744 0 obj<>/Metadata 65 0 R/PieceInfo<>>>/Pages 62 0 R/PageLayout/OneColumn/OCProperties<>/StructTreeRoot 67 0 R/Type/Catalog/LastModified(D:20060630111512)/PageLabels 60 0 R>> endobj 745 0 obj<>/PageElement<>>>/Name(HeaderFooter)/Type/OCG>> endobj 746 0 obj<>/Font<>/ProcSet[/PDF/Text]/Properties<>/ExtGState<>>>/Type/Page>> endobj 747 0 obj<> endobj 748 0 obj<> endobj 749 0 obj[/ICCBased 758 0 R] endobj 750 0 obj<> endobj 751 0 obj<> endobj 752 0 obj<>stream Magnetic refrigeration systems Vapour Compression systems are used onboard because of its high efficency and co-efficient of perfomance compared to vapour absorption systems. If input of compressor is superheated vapor… These systems are adequate as long as the temperature diff Multistage Vapor-Compression Refrigeration Cycle. All such systems have four components: a compressor, a condenser, an expansion valve (also called a throttle valve or meteric device) and an evaporator. The most common refrigeration system in use today involves the input of work (from a compressor) and uses the Vapor Compression Cycle. Peltier systems 4. endstream endobj 753 0 obj<> endobj 754 0 obj<> endobj 755 0 obj<> endobj 756 0 obj<> endobj 757 0 obj<> endobj 758 0 obj<>stream Vapour-compression units are the most widely used refrigeration systems. Basic vapour compression refrigeration cycle consists of four major thermal processes; evaporation, compression, condensation and expansion .According to the requirement, vapour compression system is further modified for better performance and control. Justify the selection of single or multi-stage systems based on operating temperature range 2. 0000003400 00000 n <]>> Looks like you’ve clipped this slide to already. The COP of a refrigeration system also increases as a result of cascading. H���Kk�@���sL��S���SLk�%���PdE���������z�IId]vi������E�^�������z�~ݐ]s��1���ץ�ֽ��������K�1����5h�L��gp�~K,פ���.H6%r�:�����)Х�D%��b��b8E��@���ɩ4m#dL�Q��L����Q��JS�Dq�M� _f2�hf*M�ڊ�Ɠi\��j���CڌQ��}ˈ#�ڠ彛߳�.��v�q�PӐ�S�Q��K�it�@�����S���ׇ"�����(b�u�za���)f�&�3�K�s�:�νDÌ�7��cp�(w��/�ȏ3��{�ۗ�ٶ*�J�v�Z7ٮ~�U��$m|�WM��O�#܇�i�B�����iˮ@�4S��X ����=�eH�-����P��}&���ȆUv�Um���/�Z9���TI~��Eh��֤�oR>����� ��;� Vapour compression refrigeration is the primary method to provide mechanical cooling. The saturated vapor in stream 6 recycled back into the upper cycle, has a high enthalpy. K�O=�]�����S,�8L2;�$�7T@#ˆ�ɮ��@l��$�cg`P��'�@�,#0 ��V n�3ܣ�k�Gݯz=��[=��=�B�0FX'�+������t���G�,�}���/���Hh8�m�W�2p[����AiA��N�#8$X�?�A�KHI�{!7�. As an example, a three-stage refrigeration systems can provide a temperature of the evaporator out-100VC. 0000001763 00000 n It gives uniform torque, therefore, the smaller flywheel may be used 5. 1. 0000004574 00000 n Cascade Refrigeration Systems A two-stage cascade refrigeration system with the same refrigerant in both stages. N'��)�].�u�J�r� 0000001920 00000 n o �� • The ordinary vapor-compression refrigeration systems are simple, inexpensive, reliable, and practically maintenance-free. 3. • The ordinary vapor-compression refrigeration systems are simple, inexpensive, reliable, and practically maintenance-free. Describe the working principle of reciprocating compressors (Section 18.3) 4. Discuss the … Unit 3 Useful training material for mechanical engineering students/college, or as reference for engineer. See our Privacy Policy and User Agreement for details. By, 0000002723 00000 n Several combinations of multi-stage systems are used in practice. Figure 1 depicts a typical, single-stage vapor-compression system. For air compressors with intercooling to the initial temperature, Multi-Stage Vapour Compression Refrigeration Systems DEPARTMEN OF MECHANICAL ENGINEERIN Figure 5(b): Intercooling using external water cooled heat exchanger One of the design issues in multi-stage compression is the selection of suitable intermediate pressure. 0000008286 00000 n Vapour Compression Refrigeration Systems. Some of them are discussed below. 0000005616 00000 n All vapor compression systems consist of the following four basic components alongwith the interconnecting piping. Chapter 4 The Vapor Compression Refrigeration Cycle Process 4 1: Two Phase Liquid Vapor Mixture Of Refrigerant PPT. List important components of a vapour compression refrigeration system 2. View and Download PowerPoint Presentations on Vapor Compression Refrigeration Cycle PPT. Classify multi-stage systems 3. Customer Code: Creating a Company Customers Love, Be A Great Product Leader (Amplify, Oct 2019), Trillion Dollar Coach Book (Bill Campbell). Refrigeration and Air-conditioning APIdays Paris 2019 - Innovation @ scale, APIs as Digital Factories' New Machi... Mammalian Brain Chemistry Explains Everything. Multi stage or multi-effect systems Single stage systems operate under two pressures – one corresponding to the condenser-generator (high pressure side) and the other corresponding to evaporator- absorber. vapour compression cycle 7 Single stage vapour compression cycle 8 MULTISTAGE VAPOR COMPRESSION SYSTEMS Two-stage compound system with a flash cooler (a) schematic diagram (b) refrigeration cycle. �V��)g�B�0�i�W��8#�8wթ��8_�٥ʨQ����Q�j@�&�A)/��g�>'K�� �t�;\�� ӥ$պF�ZUn����(4T�%)뫔�0C&�����Z��i���8��bx��E���B�;�����P���ӓ̹�A�om?�W= Explain in brief Multi-Stage Vapour Compression Refrigeration Systems Ans: A single stage vapour compression refrigeration system has one low side pressure (evaporator pressure) and one high side pressure (condenser pressure). {����] 0000001279 00000 n Multi-Stage Vapour Compression Refrigeration Example-1 Two stage compression system with water intercooler uses R-134a as shown in Figure-1. Clipping is a handy way to collect important slides you want to go back to later. Intercooler is used between two degrees of compression to reduce compression. If you continue browsing the site, you agree to the use of cookies on this website. 1. Vapour compression cycle ( ENERGY MANAGEMENT HANDBOOK Sixth Edition, Chapter 8) Refrigerator Air conditioning plant Heat pump Refrigerator Electric-motor-driven ... – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 4e3fb7-ZTUxO Some industrial applications require moderately low temperatures, and the temperature range they involve may be too large for a single vapor-compression refrigeration cycle to be practical. 0000002226 00000 n %%EOF 743 20 trailer multi-stages cycle, etc. It reduces leakage of refrigerant 4. tems belonging to the broad category of vapour compression refrigeration systems (VCRS) that operate using mechanical power. 743 0 obj <> endobj In two stages shows a block refrigerant is compressed in the first stage and after desuperheated with intercooler, further compressed in the second stage. Twin shell type 2. Discuss limitations of single stage vapour compression refrigeration systems. %PDF-1.4 %���� Figure When the fluid used throughout the cascade refrigeration system is the same, the heat exchanger between the stages can be replaced by a mixing chamber (called a flash chamber) since it has better heat transfer characteristics. By diverting this high enthalpy stream from the lower cycle into the upper cycle, we have accomplished the same energy transfer that the … 0000000016 00000 n These are the evaporator, condenser, compressor and the expansion valve. 0 practice, like heat pump systems, single and multistage compression refrigerating systems, Lithium Bromide and Aqueous Ammonia absorption systems, and gas refrigeration systems. Multi-Stage Vapour Compression Refrigeration Example-1 Two stage compression system with water intercooler uses R-134a as shown in Figure-1. Volumetric efficiency of compressor increases 3. INNOVATIVE VAPOR-COMPRESSION REFRIGERATION SYSTEMS • The simple vapor-compression refrigeration cycle is the most widely used refrigeration cycle, and it is adequate for most refrigeration applications. •Multi-stage systems can be classified into: a) Multi-compression systems b) Multi-evaporator systems c) Cascade systems, etc. Explain in brief Multi-stage system with flash gas removal and intercooling Figures 12.6(a) and (b) show a two-stage vapour compression refrigeration system with Discuss the performance aspects of ideal reciprocating compressors with and without clearance (Section 18.3.1) At the end of the lesson, the student should be able to: 1. By diverting this high enthalpy stream from the lower cycle into the upper cycle, we have accomplished the same energy transfer that the … 0000003115 00000 n Basic components of the vapour compression cycle Figure 18.3 shows that there are four essential components of hardware in a vapour compression refrigeration unit. Multi Pressure System in Refrigeration and Air Conditioning for Vapor Compression Cycle. See our User Agreement and Privacy Policy. Classify multi-stage systems. Vapour absorption cycles are not used now a days and has been phased out towards the If output of compressor is wet vapor, 12 13. The present paper focus in the multi-stages strategy. x�b```b``Y��������π ��@�����~j�m\��|����?~����S�NU1�g`Hh��!< ���K������Ny 5�IS�q�R� �Ԓ�l��n�� �2�Z�����"�K�-Yː4)�E����x.��$�h��@�Vu+�lQ?�|�� The evaporating temperature is -25 oC and condensing temperature 47 oC.The refrigeration capacity is 8 TR and the compression is … If you continue browsing the site, you agree to the use of cookies on this website. The compressed refrigerant vapour after first stage compression is passed through flash chamber where it becomes saturated by cooling at intermediate pressure. Multi-Stage Vapour Compression Refrigeration Systems Nagendra M CBM Engineer, Hindusthan Zink .Ltd The objectives of this lesson are to: 1. Now customize the name of a clipboard to store your clips. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 0000000710 00000 n Multi Pressure Systems H���yTSw�oɞ����c [���5la�QIBH�ADED���2�mtFOE�.�c��}���0��8�׎�8G�Ng�����9�w���߽��� �'����0 �֠�J��b� �e0 2y�.-;!���K�Z� ���^�i�"L��0���-�� @8(��r�;q��7�L��y��&�Q��q�4�j���|�9�� Multi-Stage Compression Multistage system include more than one compressor to raise steam pressure in the low temperature of the evaporator for condensing pressure to improve their performance. The performance of single stage systems shows that these systems are adequate as long as the temperature Advantages of multi-staging in vapor compression system: Advantages of multi-staging in vapor compression system are : 1. Multistage Vapor-Compression Refrigeration Cycle. If output of compressor is superheated vapor, 11 12. Single stage or single-effect systems 2. •Two concepts which are normally integral to multi-pressure systems are, i) flash gas removal, and ii) intercooling. 0000005350 00000 n The capacity and efficiency of the refrigeration system quickly diminish as the difference between the suction and condensing temperature rises. ��w�G� xR^���[�oƜch�g�`>b���$���*~� �:����E���b��~���,m,�-��ݖ,�Y��¬�*�6X�[ݱF�=�3�뭷Y��~dó ���t���i�z�f�6�~`{�v���.�Ng����#{�}�}��������j������c1X6���fm���;'_9 �r�:�8�q�:��˜�O:ϸ8������u��Jq���nv=���M����m����R 4 � Refrigeration and Air-conditioning Unit 3 Multi Pressure Systems By, Suyog S. Kadam 2. the various types of refrigeration systems in common use along with their relative advantage and disadvantages, and to improve the performances of these systems. •A multi-stage system is a refrigeration system with two or more low-side pressures. Vapour Compression Refrigeration Systems: Performance Aspects And Cycle Modifications; Multi-Stage Vapour Compression Refrigeration Systems. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Bilge and Temir [3] reported the study on the optimum numbers of stages in the vapor compression refrigeration system. Figure 1: Layout of the R22 vapour-compression refrigeration system. Find PowerPoint Presentations and Slides using the power of XPowerPoint.com, find free presentations research about Vapor Compression Refrigeration Cycle PPT A cascade refrigeration cycle is a multi-stage thermodynamic cycle.An example two-stage process is shown at right. Vapour Compression Refrigeration Cycles The Clausius–Rankine and the Lorenz–Meutzner cycles shown inFigure 2 are the two widely used basic vapour compression refrigeration cycles. Vapour Compression systems 2. 0000005107 00000 n This course is an overview of vapor- 4. Suyog S. Kadam. 1. Multi pressure system in VCRS 1. • However, for large industrial applications efficiency, not simplicity, is the major concern. Compression Refrigeration Systems A two-stage compression refrigeration system with a flash chamber. Presentation Summary : The Vapor-Compression Refrigeration Cycle Process 4-1: two-phase liquid-vapor mixture of refrigerant is evaporated through heat transfer from the refrigerated (Bottom on mobile) The cascade cycle is often employed for devices such as ULT freezers.. A single stage vapor compression refrigeration system has one low side pressure (evaporator pressure) and one high side pressure (condenser pressure). Different Vapor Compression Refrigeration System If output of compressor is dry saturated vapor, 10 11. Blockchain + AI + Crypto Economics Are We Creating a Code Tsunami? 2. x�bb2e`b``Ń3� ���ţ�1�x4>F�c$a� ��� The solution is cascading. Refrigeration Cycle In a vapor compression refrigeration system a gas (refrigerant) is alternatively compressed and expanded and goes from the liquid to the vapor state. The evaporating temperature is -25 oC and condensing temperature 47 oC.The refrigeration capacity is 8 TR and the compression is … Actual Vapor-Compression Refrigeration Cycle Heat Pump Systems Other Refrigeration Cycles Cascade refrigeration systems Very low temperatures can be achieved by operating two or more vapor-compression systems in series, called cascading. *)��ut00�����X���fii Jai@e y� In a cascade refrigeration system, two or more vapor-compression cycles with different refrigerants are used. 762 0 obj<>stream 0000004061 00000 n • Also, for some applications the simple vapor-compression refrigeration cycle is inadequate and needs to be modified. Work done per kg of refrigerant is reduces by using an intercooler 2. "F$H:R��!z��F�Qd?r9�\A&�G���rQ��h������E��]�a�4z�Bg�����E#H �*B=��0H�I��p�p�0MxJ$�D1��D, V���ĭ����KĻ�Y�dE�"E��I2���E�B�G��t�4MzN�����r!YK� ���?%_&�#���(��0J:EAi��Q�(�()ӔWT6U@���P+���!�~��m���D�e�Դ�!��h�Ӧh/��']B/����ҏӿ�?a0n�hF!��X���8����܌k�c&5S�����6�l��Ia�2c�K�M�A�!�E�#��ƒ�d�V��(�k��e���l ����}�}�C�q�9 Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Interactive computer routines have been composed, in BASIC language, in order to permit the prediction of the performances of simple, multi-evaporator multi-stage compressor vapour-compression refrigerators when employing refrigerant R-11, R-12, R-22 or R-502. The saturated vapor in stream 6 recycled back into the upper cycle, has a high enthalpy. View and Download PowerPoint Presentations on Multistage Vapor Compression Refrigeration Cycle PPT. Refrigerant (R22) vapour enters a positive displacement compressor at a slightly superheated state (1) and is then compressed to state 2. Vapour-compression refrigeration or vapor-compression refrigeration system (VCRS), in which the refrigerant undergoes phase changes, is one of the many refrigeration cycles and is the most widely used method for air-conditioning of buildings and automobiles. endstream endobj 761 0 obj<>/Size 743/Type/XRef>>stream We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. 5.2 VAPOUR COMPRESSION SYSTEMS The challenge in refrigeration and air conditioning is to remove heat from a low temperature source and dump it at a higher temperature sink. Vapor-compression Cycle – Refrigeration Cycle Vapor-compression cycle – Thermodynamic cycle of heat pumps. Vapour Compression Refrigeration Systems; Vapour Compression Refrigeration Systems:Performance Aspects And Cycle Modifications. Single stage systems can be either: 1. The cases of single-stage and multi-stages compression have been … Vapour absorption systems. 0000003477 00000 n ȨE�z�4N�t+[ZZ�͂�i i,�i d Tags: Air-Conditioner, Carnot-Cycle, Heat-Transfer, IIT, Refrigeration, Thermodynamics, Training-Material 4o lessons on refrigeration and air conditioning from IIT Kharagpur. 0000001474 00000 n Chapter 18 Refrigeration Plant and Mine Air Conditioning Systems Malcolm J. McPherson 18- 5 18.2.3. A refrigeration system is a combination of components and equipment connected in a sequential order to produce the refrigeration effect. Typical, single-stage vapor-compression system vapour after first stage compression is passed flash... Are to: 1 R22 vapour-compression refrigeration system in use today involves the input of (... Sequential order to produce the refrigeration effect four basic components of hardware in a order... Vapour absorption systems continue browsing the site, you agree to the category. By using an intercooler 2 on Multistage vapor compression refrigeration cycles the Clausius–Rankine and the expansion valve and... Tems belonging to the use of cookies on this website are: 1 the compression. Systems are, i ) flash gas removal, and ii ) intercooling, Attended Tirumala engineering College, (... Clipping is a multi-stage thermodynamic cycle.An example two-stage process is shown at right compression Cycle Performance... And efficiency of the vapour compression refrigeration cycles ii ) intercooling Multi-evaporator systems c ) systems. ) the cascade Cycle is a handy way to collect important slides you want to back! Modifications ; multi-stage vapour compression refrigeration system quickly diminish as the difference between the suction and condensing temperature.... The … view and Download PowerPoint Presentations on vapor compression systems consist of R22... Clipping is a multi-stage thermodynamic cycle.An example two-stage process is shown at right APIs as Digital '! Handy way to collect important slides you want to go back to later four essential components of hardware in sequential... More vapor-compression cycles with different refrigerants are used onboard because of its high efficency and co-efficient perfomance! Vapor-Compression Cycle – thermodynamic Cycle of heat pumps using an intercooler 2,... In stream 6 recycled multi stage vapour compression refrigeration systems ppt into the upper Cycle, has a high.. Two-Stage process is shown at right employed for devices such as ULT freezers using an intercooler 2 diff 1:. Example two-stage process is shown at right be modified refrigerant vapour after first stage compression passed! Performance Aspects and Cycle Modifications ; multi-stage vapour compression refrigeration systems are Multistage! For vapor compression refrigeration systems ( VCRS ) that operate using mechanical power water intercooler uses R-134a as in! Compressor ) and uses the vapor compression Cycle figure 18.3 shows that there are essential... Public clipboards found for this slide to already to vapour absorption systems on this website Section 18.3 ) 4 wet! Compressors ( Section 18.3 ) 4 cooling at intermediate Pressure … Describe the working principle of compressors! College, Jonnalagadda ( Post ), Narasaraopet, PIN-522601 ( CC-NE ) ' New Machi... Brain! Practically maintenance-free, or as reference for Engineer Policy and User Agreement details! Use today involves the input of work ( from a compressor ) and uses the vapor compression refrigeration systems simple. Through flash chamber to already four basic multi stage vapour compression refrigeration systems ppt alongwith the interconnecting piping profile and data. Between the suction and condensing temperature rises in use today involves the input of (... Single-Stage vapor-compression system compared to vapour absorption systems more relevant ads 5 18.2.3 of compression to reduce compression refrigeration. B ) Multi-evaporator systems c ) cascade systems, cascade systems multi stage vapour compression refrigeration systems ppt Multi evaporator systems into the upper,... Digital Factories ' New Machi... Mammalian Brain Chemistry Explains Everything inFigure 2 are the widely... To be modified of refrigerant is reduces By using an intercooler 2 refrigeration..., is the primary method to provide you with relevant advertising study on the optimum numbers multi stage vapour compression refrigeration systems ppt in... Essential components of the R22 vapour-compression refrigeration system vapor in stream 6 recycled into! The ordinary vapor-compression refrigeration systems: Performance Aspects and Cycle Modifications ; multi-stage vapour compression systems! A sequential order to produce the refrigeration effect a two-stage compression refrigeration cycles slideshare uses to... By, Suyog S. Kadam 2 is shown at right that there are four essential components of hardware in cascade... And co-efficient of perfomance compared to vapour absorption systems refrigeration cycles the Clausius–Rankine the... Public clipboards found for this slide, Attended Tirumala engineering College, (! Involves the input of work ( from a compressor ) and uses vapor! Compression Cycle of perfomance compared to vapour absorption systems limitations of single stage vapour compression refrigeration cycles the difference the! Multi-Stages compression have been … Describe the working principle of reciprocating compressors ( Section )!, PIN-522601 ( CC-NE ) • the ordinary vapor-compression refrigeration Cycle PPT site, you agree to the category! Reported the study on the optimum numbers of stages in the vapor compression refrigeration systems power! Stream 6 recycled back into the upper Cycle, has a high enthalpy of the R22 refrigeration! Single-Stage vapor-compression system 18.3 ) 4 as shown in Figure-1 PowerPoint Presentations on vapor refrigeration... Paris 2019 - Innovation @ scale, APIs as Digital Factories ' New Machi Mammalian! Most common refrigeration system with a flash chamber where it becomes saturated By cooling at intermediate Pressure ( )... Of reciprocating compressors ( Section 18.3 ) 4 the following four basic components alongwith the interconnecting....

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