types of evaporators pdf

Rising Film Evaporators 3. !(!0*21/*.-4;K@48G9-.BYBGNPTUT3? Your name. %&'()*456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz�� The main advantage of this type of evaporators is higher heat transfer rate. 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. ��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��! 0000002400 00000 n Description . Heating may be either direct or indirect. 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��=~? 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. 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 … The first two are used for concentrating solutions where no precipitates are formed. %�� endobj 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. b) Long tube vertical (LTV) rising film type. Long-Tube Vertical Evaporators 2.4. They are useful for the evaporation of liquids at small scale. B) Equipment heated through a double wall. Unlike single-stage evaporators, these evaporators can be composed of up to seven evaporator stages (effects). Calandria Evaporator. In condensers the refrigerant vapor condenses by rejecting heat to an external fluid, which acts as a heat sink. Falling Film Evaporators 2.5. available today. Parallel feed 3. 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. TYPE OF EVAPORATORS 2.1. Email. Plate Evaporators 5. Direct heating is represented by solar evaporation and by submerged combustion of a fuel. Gasketed Plate Evaporator 3. 0000009478 00000 n startxref Report "Types of Evaporators" Please fill this form, we will try to respond as soon as possible. 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). c) Long tube vertical (LTV) falling film type. xref 0000039533 00000 n 0000011369 00000 n 0000015132 00000 n Mixed feed 3.4. Tube length usually varies from 20 to 65 ft. Short-Tube Vertical Evaporators 2.2. Types and Design In the evaporation process, concentration of a product is accomplished by boiling out a solvent, generally water. 0000012761 00000 n ��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��'. 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. 0000028469 00000 n 0000003492 00000 n We shall discuss here the most important types of evaporators which are of interest to the dairy industry. exchanger. 0000011282 00000 n The main advantage of this type of evaporators is higher heat transfer rate. Bare Tube Evaporators The bare tube evaporators are made up of copper tubing or steel pipes. They can operate under vacuum. Embed. Long-tube vertical evaporators — The three types of long-tube vertical evaporators are the most popular evaporators used today. ��"� �zTv�Q\�܎��+ F a�A-�Ț,�' �{W5z��iZ�S޽��嘓�� 4 0 obj 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. Evaporators are also used in oil fields to separate water and various other compounds from crude oil. <> These evaporators are necessarily precision machines and therefore are more expensive than other types, particularly so if compared strictly on equivalent heat transfer area. 251 30 evaporators and its types , mass transfer . The Plate Evaporators are also known as the gasketed plate and frame evaporators. It was observed that the total 0000012067 00000 n Evaporation Removal of water vapor from aqueous solution in the presence of heat, and more concentrated solution remains. Falling Film Evaporators 2. ]c\RbKSTQ�� C''Q6.6QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ�� , +" �� EVAPORATORS TYPES AND DESIGN In the evaporation process, concentration of a product is accomplished by boiling out a solvent, generally water. This is called a calandria. A refrigerant compressor is a machine used to compress the … 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. METHODS OF FEEDING OF EVAPORATORS 3.1. 5 0 obj Forced Circulation type. 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. While they are natural-circulation evaporators, they are also … The two general types of evaporators used in today’s refrigeration systems are floo and dry, or direct expansion (DX), evaporators. The most common evaporators fall into three types: rising film, falling film, and forced circulation flash. endobj The long-tube vertical (LTV) rising-film evaporator is commonly used to concentrate many non-salting liquors. The type of equipment used depends largely on the method of applying heat to the liquor and the method of agitation. In evaporators, the liquid refrigerant evaporates by extracting heat from an external fluid (low temperature heat source). 0000030899 00000 n 0 Forward feed 3.2. Types of evaporators. 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. 1. 0000017782 00000 n The energy consumption for single-effect evaporators is very high and is most of the cost for an evaporation system. Most of the industrial evaporators have tubular heating surfaces. endobj Two types of evaporators, rising film calendria type multieffect evaporator (Robert type) and Radial flow evaporator were analyzed. In indirect heating, the heat, generally provided by the condensation of steam, passes through the heating surface of the evaporator. Description Download Types of Evaporators Comments. Multiple-effect evaporators. 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. The flooded type evaporators are available in larger capacities ranging from 10 TR to thousands of TR. 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 It has a vertical tube bundle consisted of short tubes (usually less than six feet) integral with the shell. The bare tub… 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. �� } !1AQa"q2��#B��R��$3br� Basket-type Vertical Evaporators It is very similar to those of the standard evaporator except that the down take is annular. 0000024205 00000 n Forced Circulation Evaporators 4. 1 0 obj More evaporation is accomplished in these units than in all other types combined. 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. 1. 0000008362 00000 n %PDF-1.5 0000006168 00000 n Both rising film and falling types are used. stream �� 2.1. <> $4�%�&'()*56789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz�� ? Condensers and evaporators are basically heat exchangers in which the refrigerant undergoes a phase change. 0000000016 00000 n The other two are used for salting or scaling applications. trailer Backward feed 3.3. �� w !1AQaq"2�B�� #3R�br� There are other types of plate evaporators, which work with only climbing film. The tubes may be horizontal or vertical, long or short; the liquid may be inside or outside the tubes. 0000003266 00000 n DOWNLOAD PDF . As the name implies, a flooded evaporator is … ��/�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*�� 0000010609 00000 n It is somewhat outdated in today’s … Submit Close. Choice of equipmentSwenson designs and manufactures four general types of evaporators. 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. 0000026633 00000 n The recovered … Share. 0000013926 00000 n evaporators, all three sections are contained in a single vertical cylinder. The evaporators used for the refrigeration and the air conditioning applications have different types of construction depending on the application. <>/Font<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 595.44 841.68] /Contents 5 0 R/Group<>/Tabs/S>> Basket types can also be used when the liquor may result in scale. The LTV evaporators are commonly used … types of evaporators is the way in which the heat exchanger and vapor body are connected together, and their physical relationship to each other. Application: production of concentrated juice (orange, tomato, etc.) Both rising film and falling types are used. stream Heat and mass balances are used in calculations to design single- and multiple-effect evaporators. <> The following list contains the descriptions of the most common types of evaporators. This handbook describes the many types of evaporators and operating options available through the experience and manufacturing capabilities of APV. 280 0 obj <>stream Steam economy gives an indication of the process efficiency. endobj types of evaporators pdf for sale - 0 - types of evaporators pdf wholesalers & types of evaporators pdf manufacturers from China manufacturers. 0000003229 00000 n Based on their construction the various types of evaporators are: 1. 2.2 Evaporators Systems. Basket-type Vertical Evaporators 2.3. 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. 0000024168 00000 n Types of Evaporator - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. <> Rising or Climbing Film Evaporators 2.6. This type of evaporators is mainly used for concentration of food products, pharmaceuticals, emulsions, glue, etc. The feed enters at the 3 0 obj ]]�~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�(�{�� There is a vapour space above 0000002298 00000 n 0000000896 00000 n TYPE OF EVAPORATORS Evaporator consists of a heat exchanger for boiling the solution with special provisions for separation of liquid and vapor phases. This Handbook describes the many types of evaporators and operating options available through the experience and manufacturing capabilities of companies within the APV Group. Reason. Industrial applications: These are the same as for short-tube evaporators. Natural circulation type – a) Vertical short tube or Calandria evaporator. <]/Prev 958018>> They are characterized by low heat transfer rate. 2. "|�{��o%��lsCU�� (|d�k�ʰ�ѮeZQ��V(��8��C��8 �`\F��k�;��kM$�!&�Y:��r*Ĥka�"�f**��(��Ӹ��J��A�u+D��6L�|��d]�e��N�5;AI�گ��|;�.�� T��秲�9�� uZ�x*��Хf��B~`H&�Qj0�:ٷ/_|�*ِ�%��Ġ ��bD!��ҼNT^"�-h��+�PR��!��@��gbH.�rDD��O�[A��C�&�`�)l��u�T �6ܿ|��9�. types of evaporators pdf wholesale, buy types of evaporators pdf from 0 types of evaporators pdf suppliers from China. ��B�eZ��Z��d�L%��|��g*Ƅ|o�˰l��_��w�KQ��X�&�@�+x�M��W��!��#�l~`2Ɨ ��3!�Ȑ\i�^9v�g0i�K�U�u��'T�'��n�-�� i�_ڃa�o#�߷�3g�__��[��P��JQ�}G�J�� h��UmLg��ʵR�8��s�V-��6�b�B��B��,��e��䀪GD�7-C͐��2�c��e�� ,��η,��m ۇ��?��.��y�/��_ � �p��$��H�� 1 ��h�6@��ආЍ��@�P��i��j�#��7��v�@�c�\�Q��%�`��~��s+��l�3��{��஑�. �hN��uѭd�uɜ� evaporators Evaporation Types of evaporation equipment and operation methods Calculation methods for ¾Single-effect evaporators ¾Multiple-effect evaporators. Forced Circulation Evaporators 2.7 Agitated Thin Film Evaporator 2.8. Tube length usually varies from 20 to 65 ft. endstream 0000007285 00000 n %%EOF 0000004900 00000 n 0000003060 00000 n 0000003378 00000 n v�܃s+uZ��?�0U��3�"�ߍ4^=�T"D Thermal and Mechanical Vapor Recompression (TVR & MVR) In the centre of the cylinder there is a steam heating section, with pipes passing through it in which the evaporating liquors rise. 0000002887 00000 n %PDF-1.5 %�� PERFORMANCE OF EVAPORATORS … The feed enters at the bottom and the liquid starts boiling at lower part of the tube. 251 0 obj <> endobj The Plate Evaporator is constructed by setting up a number of plates with corner openings between a top and bottom bar. 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. 2 0 obj �� JFIF ` ` �� C APV Evaporator Hndbook 12/6/00 11:07 AM Page 3.