In condensers the refrigerant vapor condenses by rejecting heat to an external fluid, which acts as a heat sink. 0000006168 00000 n They are useful for the evaporation of liquids at small scale. 0000002887 00000 n Most of the industrial evaporators have tubular heating surfaces. ��"� �zTv�Q\�܎��+ F a�A-�Ț,�' �{W5z��iZ�S޽��嘓�� 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. The evaporators used for the refrigeration and the air conditioning applications have different types of construction depending on the application. Parallel feed 3. The tubes may be horizontal or vertical, long or short; the liquid may be inside or outside the tubes. Tube length usually varies from 20 to 65 ft. 251 30 0000010609 00000 n c) Long tube vertical (LTV) falling film type. ��/�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*��� The feed enters at the bottom and the liquid starts boiling at lower part of the tube. �� � w !1AQaq"2�B���� #3R�br� 0000015132 00000 n Choice of equipmentSwenson designs and manufactures four general types of evaporators. Forced Circulation Evaporators 4. 0000009478 00000 n The main advantage of this type of evaporators is higher heat transfer rate. 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����=~? It has a vertical tube bundle consisted of short tubes (usually less than six feet) integral with the shell. stream 0000003266 00000 n types of evaporators is the way in which the heat exchanger and vapor body are connected together, and their physical relationship to each other. 2.1. The LTV evaporators are commonly used … Forced Circulation type. As the name implies, a flooded evaporator is … Forward feed 3.2. available today. PERFORMANCE OF EVAPORATORS … Industrial applications: These are the same as for short-tube evaporators. The two general types of evaporators used in today’s refrigeration systems are floo and dry, or direct expansion (DX), evaporators. DOWNLOAD PDF . ���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��'. Unlike single-stage evaporators, these evaporators can be composed of up to seven evaporator stages (effects). Heating may be either direct or indirect. exchanger. This type of evaporators is mainly used for concentration of food products, pharmaceuticals, emulsions, glue, etc. Types and Design In the evaporation process, concentration of a product is accomplished by boiling out a solvent, generally water. Report "Types of Evaporators" Please fill this form, we will try to respond as soon as possible. types of evaporators pdf wholesale, buy types of evaporators pdf from 0 types of evaporators pdf suppliers from China. 2 0 obj ���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�� In indirect heating, the heat, generally provided by the condensation of steam, passes through the heating surface of the evaporator. These evaporators are necessarily precision machines and therefore are more expensive than other types, particularly so if compared strictly on equivalent heat transfer area. startxref Your name. A refrigerant compressor is a machine used to compress the … The recovered … 3 0 obj %PDF-1.5 %%EOF The type of equipment used depends largely on the method of applying heat to the liquor and the method of agitation. They are characterized by low heat transfer rate. The main advantage of this type of evaporators is higher heat transfer rate. 0000013926 00000 n 0 Reason. 2. Thermal and Mechanical Vapor Recompression (TVR & MVR) METHODS OF FEEDING OF EVAPORATORS 3.1. 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 … �� Rising Film Evaporators 3. 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. 0000026633 00000 n 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. APV Evaporator Hndbook 12/6/00 11:07 AM Page 3. 0000017782 00000 n 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. 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. 0000003060 00000 n B) Equipment heated through a double wall. 251 0 obj <> endobj Steam economy gives an indication of the process efficiency. endobj ��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��! b) Long tube vertical (LTV) rising film type. evaporators, all three sections are contained in a single vertical cylinder. 0000012761 00000 n trailer In almost all evaporators the heating medium is steam, which heats a product on the other side of a heat transfer surface. Gasketed Plate Evaporator 3. It was observed that the total <> $4�%�&'()*56789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz�������������������������������������������������������������������������� ? <> 0000012067 00000 n 5 0 obj TYPE OF EVAPORATORS Evaporator consists of a heat exchanger for boiling the solution with special provisions for separation of liquid and vapor phases. The bare tub… endobj endobj Based on their construction the various types of evaporators are: 1. Tube length usually varies from 20 to 65 ft. �� � } !1AQa"q2���#B��R��$3br� There are other types of plate evaporators, which work with only climbing film. The other two are used for salting or scaling applications. Multiple-effect evaporators. Direct heating is represented by solar evaporation and by submerged combustion of a heat sink of vertical! Heat source ) lower part of the cylinder there is a vapour space above and... And Design in the centre of the evaporator evaporator except that the down is. 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