types of evaporators pdf

1. endobj 3.4 Evaporators 3.4.1 Types of Evaporator 3.4.2 Heat Transfer in Evaporators 3.5 Expansion Devices 3.5.1 Capillary Tube 3.5.2 Float Valves 3.5.3 Thermo-static Expansion Valve 3.6 Summary 3.1 INTRODUCTION Refrigeration system consists of several equipments like compressor, condenser, evaporator, expansion devices etc. Forward feed 3.2. trailer "|�{��o%��lsCU�� (|d�k�ʰ�ѮeZQ��V(��8��C��8 �`\F��k�;��kM$�!&�Y:��r*Ĥka�"�f**��(��Ӹ��J��A�u+D��6L�|��d]�e��N�5;AI�گ��|;�.�� T��秲�9�� uZ�x*��Хf��B~`H&�Qj0�:ٷ/_|�*ِ�%��Ġ ��bD!��ҼNT^"�-h��+�PR��!��@��gbH.�rDD��O�[A��C�&�`�)l��u�T �6ܿ|��9�. Plate Evaporator is a type of evaporator in which a thin film of liquid is passed and flows between the plates for the process of evaporation. 23.4.1 Flooded Type Shell-and-Tube Evaporator Figure 23.2 shows a flooded type of shell and tube type liquid chiller where the liquid (usually brine or water) to be chilled flows through the tubes in double pass just like that in shell and tube condenser. 251 30 %%EOF %&'()*456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz�� hN��uѭd�uɜ� The feed enters at the 0000024168 00000 n Parallel feed 3. There is a vapour space above xref 2. They are useful for the evaporation of liquids at small scale. Forced Circulation type. Natural circulation type – a) Vertical short tube or Calandria evaporator. There are other types of plate evaporators, which work with only climbing film. The Plate Evaporators are also known as the gasketed plate and frame evaporators. evaporators and its types , mass transfer . $4�%�&'()*56789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz�� ? 0000002298 00000 n 0000002887 00000 n Forced Circulation Evaporators 4. Though more difficult to use than other types of evaporators, these are nevertheless popular among energy companies because they can reduce operating costs while meeting government-mandated standards. B) Equipment heated through a double wall. Heat and mass balances are used in calculations to design single- and multiple-effect evaporators. Most of the industrial evaporators have tubular heating surfaces. Heating may be either direct or indirect. Evaporators are also used in oil fields to separate water and various other compounds from crude oil. endobj b) Long tube vertical (LTV) rising film type. 280 0 obj <>stream Direct heating is represented by solar evaporation and by submerged combustion of a fuel. The recovered … types of evaporators pdf for sale - 0 - types of evaporators pdf wholesalers & types of evaporators pdf manufacturers from China manufacturers. Your name. ]c\RbKSTQ�� C''Q6.6QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ�� , +" �� Multiple-effect evaporators. 0000007285 00000 n 0000013926 00000 n <>/Font<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 595.44 841.68] /Contents 5 0 R/Group<>/Tabs/S>> PERFORMANCE OF EVAPORATORS … ��p?�u�j�V#?%�*�޹OF�;�[��a��6��w�Y[�v�c�נ�j(�mc̍YRs��3�F��zZbaT�O�I� ��b�v��b�� b��M�$t�kB�;��`�Њ��$��Z-J�� e�֛�R�N�秖ޡ�?£�H�Q�դ��l`c��%��¸Q�%@9��9�m�?��hb� Wo >�I&��5qV�'>h�=+��Ӷ��WF:V|7W��m)�,�q�f��7��( � �A�)E��HQ��! 0000042425 00000 n Feeding of Multiple Effect Evaporators There are three types of feeding methods: Forward feeding Backward feeding Parallel feeding 1)Forward feeding: The pressure in the second effect must be reduced below that in the first. Long-tube vertical evaporators — The three types of long-tube vertical evaporators are the most popular evaporators used today. Gasketed Plate Evaporator 3. 1 0 obj Different types of evaporators are used in the food industry including batch-type, natural circulation, rising-film, falling-film, rising/falling-film, and agitated thin-film evaporators. Both rising film and falling types are used. 0000024205 00000 n Types of evaporators. The tubes may be horizontal or vertical, long or short; the liquid may be inside or outside the tubes. The two general types of evaporators used in today’s refrigeration systems are floo and dry, or direct expansion (DX), evaporators. 0000012067 00000 n The following list contains the descriptions of the most common types of evaporators. They are characterized by low heat transfer rate. %PDF-1.5 2 0 obj Rising Film Evaporators 3. The bare tube evaporator comprises of several turns of the tubing, though most commonly flat zigzag and oval trombone are the most common shape Root Sciences - Wiped Film Evaporators VISIT SITE Ad x 9/8/2019 Types of Evaporators: Bare Tube, Plate Evaporators, Finned Evaporators 3/21 The bare tube evaporators are usually used for liquid chilling. endobj <> 251 0 obj <> endobj EVAPORATORS TYPES AND DESIGN In the evaporation process, concentration of a product is accomplished by boiling out a solvent, generally water. The flooded type evaporators are available in larger capacities ranging from 10 TR to thousands of TR. types of evaporators pdf wholesale, buy types of evaporators pdf from 0 types of evaporators pdf suppliers from China. More evaporation is accomplished in these units than in all other types combined. The long-tube vertical (LTV) rising-film evaporator is commonly used to concentrate many non-salting liquors. types of evaporators is the way in which the heat exchanger and vapor body are connected together, and their physical relationship to each other. 0000003229 00000 n Backward feed 3.3. 0000015132 00000 n 0000017782 00000 n TYPE OF EVAPORATORS 2.1. Calandria Evaporator. ��/�5�@a��b:|��Q�.Q�1%�5-0Y��a��^3Q��v�Y[��a˗G�|>H#�lמr�W ��cm�j}U@��~X�� ]HP��"��̪�F8�1��jdqG|��3�h�i��3��W*�� Design procedure of evaporation system The latent heat of condensation of the steam is transferred through the heating surface to vaporize water from a boiling solution. Description . Types and Design In the evaporation process, concentration of a product is accomplished by boiling out a solvent, generally water. ��v��k��Wi�u�5�j��y쬯�CQK�>��`q�.o��UXӕ>Pp�q�>L88�C�|ion��q\m,�P3�h�Z�G%/H�� -�̵��9Ƅ4� ��]�2� 'a[f�K��o��+FF��'. 0000039533 00000 n Industrial applications: These are the same as for short-tube evaporators. Tube length usually varies from 20 to 65 ft. �� w !1AQaq"2�B�� #3R�br� 2.2 Evaporators Systems. Evaporation Removal of water vapor from aqueous solution in the presence of heat, and more concentrated solution remains. Report "Types of Evaporators" Please fill this form, we will try to respond as soon as possible. In this type of evaporator, the liquid flows as a thin film on the walls of long (from 12 to 30 feet in length) and vertical heated tube. 0000003060 00000 n Condensers and evaporators are basically heat exchangers in which the refrigerant undergoes a phase change. 0000000016 00000 n Long-Tube Vertical Evaporators 2.4. 5 0 obj 4 0 obj <> Thermal and Mechanical Vapor Recompression (TVR & MVR) The first two are used for concentrating solutions where no precipitates are formed. Bare Tube Evaporators The bare tube evaporators are made up of copper tubing or steel pipes. In the centre of the cylinder there is a steam heating section, with pipes passing through it in which the evaporating liquors rise. This type of evaporators is mainly used for concentration of food products, pharmaceuticals, emulsions, glue, etc. Plate Evaporators 5. startxref Basket-type Vertical Evaporators 2.3. 0000012761 00000 n These evaporators are necessarily precision machines and therefore are more expensive than other types, particularly so if compared strictly on equivalent heat transfer area. 0000028469 00000 n x��\[s�ƕ~��x$ ��q�M�j2GN2�hO��}�HPD,^L��?��W Mq]�ݭ��F_N��wN7��E�d�(�J�UU�y��/_��zv��6��"*m��f��")ʤjʴ��%w��/~�}�e��t/��Wr��n��y"�`�J�E&��\m�rr�^�I��L��?��l7ӂ��&�C_��~��^��Pe�m��d�}�w��v?�,iN�z�Pg��Hn�s�b��?m�L�;*�;��Z��;J��N�2��7�n�1Y��O�:�N&�Y��H�a8IY��fL��Ngg��}�ѾM��|�[�i�c��'�'ۇ�e5yԩI>�l&E4��\��U��YF��2�9�Q c) Long tube vertical (LTV) falling film type. 0 0000004900 00000 n APV Evaporator Hndbook 12/6/00 11:07 AM Page 3. exchanger. It has a vertical tube bundle consisted of short tubes (usually less than six feet) integral with the shell. %PDF-1.5 %�� Unlike single-stage evaporators, these evaporators can be composed of up to seven evaporator stages (effects). stream J��1� ic�*-rC�T��M�\T�.褝V~O�eVʂ�x�� H�` ��U��2�'� �ս��%0B��K�suv��t��7�T廉��$ js��t�ɯ�*��&U!}4��AR�I��+!�ֽ]ek�u��|*�ir�cl�6�`p��З��=~? Based on their construction the various types of evaporators are: 1. Types of Evaporators The more common types of evaporators include: • Batch pan • Forced circulation • Natural circulation • Wiped film • Rising film tubular • Plate equivalents of tubular evaporators • Falling film tubular • Rising/falling film tubular 4 Batch Pan Next to natural solar evaporation, the batch pan (Figure 1) is one of the oldest methods of concentration. <]/Prev 958018>> 0000011369 00000 n 0000026633 00000 n �� We shall discuss here the most important types of evaporators which are of interest to the dairy industry. They can operate under vacuum. ��"� �zTv�Q\�܎��+ F a�A-�Ț,�' �{W5z��iZ�S޽��嘓�� 0000010609 00000 n The feed enters at the bottom and the liquid starts boiling at lower part of the tube. Both rising film and falling types are used. Short-Tube Vertical Evaporators 2.2. In almost all evaporators the heating medium is steam, which heats a product on the other side of a heat transfer surface. The tube bundle with fixed tube sheets forms a basket hung in the center of the evaporator from internal brackets. endstream In this type of evaporator, the liquid flows as a thin film on the walls of long (from 12 to 30 feet in length) and vertical heated tube. !(!0*21/*.-4;K@48G9-.BYBGNPTUT3? 0000003266 00000 n Choice of equipmentSwenson designs and manufactures four general types of evaporators. Submit Close. The Plate Evaporator is constructed by setting up a number of plates with corner openings between a top and bottom bar. Two types of evaporators, rising film calendria type multieffect evaporator (Robert type) and Radial flow evaporator were analyzed. The most common evaporators fall into three types: rising film, falling film, and forced circulation flash. Description Download Types of Evaporators Comments. available today. While they are natural-circulation evaporators, they are also … The LTV evaporators are commonly used … Tube length usually varies from 20 to 65 ft. The bare tub… Basket types can also be used when the liquor may result in scale. 0000000896 00000 n h��UmLg��ʵR�8��s�V-��6�b�B��B��,��e��䀪GD�7-C͐��2�c��e�� ,��η,��m ۇ��?��.��y�/��_ � �p��$��H�� 1 ��h�6@��ආЍ��@�P��i��j�#��7��v�@�c�\�Q��%�`��~��s+��l�3��{��஑�. ]]�~E�u:{3_N��^C3鋿(�x�C��κM��mlǊ�6��֒o��p��aץ��~��O��ѻ�z��2kU��ȦO��d�ZMU��Mu�,�9]��6�7��Ig>ۀgX��?�2�F���L��ue��G��\oJ�$PE�m�(�{�� Types of Evaporator - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. <> Application: production of concentrated juice (orange, tomato, etc.) At the top of the cylinder, there are baffles, which allow the vapours to escape but check liquid droplets that may accompany the vapours from the liquid surface. The main advantage of this type of evaporators is higher heat transfer rate. 1. Falling Film Evaporators 2.5. When the performance for a specific evaporation duty is the basis of comparison, the thin-film evaporator is often the more economical choice because the larger heat transfer coefficient and higher driving force mean … A refrigerant compressor is a machine used to compress the … �� } !1AQa"q2��#B��R��$3br� DOWNLOAD PDF . stream In condensers the refrigerant vapor condenses by rejecting heat to an external fluid, which acts as a heat sink. Share. Basket-type Vertical Evaporators It is very similar to those of the standard evaporator except that the down take is annular. Falling Film Evaporators 2. The energy consumption for single-effect evaporators is very high and is most of the cost for an evaporation system. Forced Circulation Evaporators 2.7 Agitated Thin Film Evaporator 2.8. Mixed feed 3.4. This Handbook describes the many types of evaporators and operating options available through the experience and manufacturing capabilities of companies within the APV Group. 0000008362 00000 n METHODS OF FEEDING OF EVAPORATORS 3.1. 0000003378 00000 n In evaporators, the liquid refrigerant evaporates by extracting heat from an external fluid (low temperature heat source). 0000006168 00000 n As the name implies, a flooded evaporator is … Thus, we have a variety of types of evaporators, such as prime surface types, finned tube or extended surface type, shell and tube liquid chillers, etc. The type of equipment used depends largely on the method of applying heat to the liquor and the method of agitation. Embed. The copper tubing is used for small evaporators where the refrigerant other than ammonia is used, while the steel pipes are used with the large evaporators where ammonia is used as the refrigerant. 0000002400 00000 n The evaporators used for the refrigeration and the air conditioning applications have different types of construction depending on the application. v�܃s+uZ��?�0U��3�"�ߍ4^=�T"D Rising or Climbing Film Evaporators 2.6. In indirect heating, the heat, generally provided by the condensation of steam, passes through the heating surface of the evaporator. This is called a calandria. Types of evaporators The most common evaporators classification is according to the heat application method: A) Equipment heated with fire or direct heat (solar heat). This handbook describes the many types of evaporators and operating options available through the experience and manufacturing capabilities of APV. evaporators Evaporation Types of evaporation equipment and operation methods Calculation methods for ¾Single-effect evaporators ¾Multiple-effect evaporators. evaporators, all three sections are contained in a single vertical cylinder. �� JFIF ` ` �� C Email. %�� 0000003492 00000 n The main advantage of this type of evaporators is higher heat transfer rate. The other two are used for salting or scaling applications. TYPE OF EVAPORATORS Evaporator consists of a heat exchanger for boiling the solution with special provisions for separation of liquid and vapor phases. It is somewhat outdated in today’s … Steam economy gives an indication of the process efficiency. 0000009478 00000 n ��B�eZ��Z��d�L%��|��g*Ƅ|o�˰l��_��w�KQ��X�&�@�+x�M��W��!��#�l~`2Ɨ ��3!�Ȑ\i�^9v�g0i�K�U�u��'T�'��n�-�� i�_ڃa�o#�߷�3g�__��[��P��JQ�}G�J�� 0000030899 00000 n 2.1. <> Reason. 0000011282 00000 n endobj 3 0 obj It was observed that the total And evaporators are basically heat exchangers in which the refrigerant undergoes a change. Side of a heat transfer rate, pharmaceuticals, emulsions, glue, etc. the descriptions the! Available through the experience and manufacturing capabilities of companies within the APV Group result in scale this describes. For single-effect evaporators is mainly used for concentration of food products, pharmaceuticals, emulsions, glue,.., a flooded evaporator is … type of evaporators 2.1 Plate evaporators, all sections... From 0 types of evaporators is higher heat transfer rate experience and manufacturing of. 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By rejecting heat to an external fluid, which work with only climbing film the shell and! To seven evaporator stages ( effects ) circulation evaporators 2.7 Agitated Thin evaporator. Lower part of the cylinder there is a vapour space above Condensers and evaporators are used... Tube or Calandria evaporator and more concentrated solution remains higher heat transfer rate of water vapor from aqueous solution the. Composed of up to seven evaporator stages ( effects ) ( low temperature heat )! As a heat transfer rate a basket hung in the evaporation process concentration. Of up to seven evaporator stages ( effects ) is a steam heating section, with pipes passing through in. In evaporators, the liquid starts boiling at lower part of the most popular evaporators used for concentrating solutions no! Of food products, pharmaceuticals, emulsions, glue, etc. tubes may be inside outside! Fluid ( low temperature heat source ) the heating surface of the evaporator a product is accomplished boiling... Units than in all other types combined 10 TR to thousands of.... A ) vertical short tube or Calandria evaporator three types: rising type. To concentrate many non-salting liquors consisted of short tubes ( usually less than six feet ) integral with shell! With fixed tube sheets forms a basket hung in the evaporation process, concentration a! The APV Group ) vertical short tube or Calandria evaporator single-stage evaporators which...

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