The flow is controlled by the pressure in the evaporator. Presentation on evaporators 1. It is in the evaporators where the actual cooling effect takes place in the refrigeration and the air conditioning systems. Clipping is a handy way to collect important slides you want to go back to later. In natural convection evaporators, the velocity of the fluid is usually less than one to 1.25 m/s. The evaporators used for the refrigeration and the air conditioning applications have different types of construction depending on the application. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. There are two types of evap. In this form, there is no free surface in the evaporator (in contrast to the short-tube type—see Figure 3); the tubes are much longer and separation occurs in a separate vessel. types of evaporators in refrigeration & types of evaporators in refrigeration online Wholesalers - choose types of evaporators in refrigeration from 1471 list of China types of evaporators in refrigeration … BARE (PLAIN TUBE) TYPE: top: This type consists of a bank of tubes, copper or steel. It depends on the relative position of the source of a cold and the user of refrigeration, as well as on the type of refrigerant. The process of evaporation and condensation of the refrigerant takes place at two different pressure levels to achieve refrigeration in both cases. Bare tube coil evaporator 2. Search for jobs related to Types of evaporators ppt or hire on the world's largest freelancing marketplace with 19m+ jobs. Suction Line. In natural convection evaporators, … The Metering Device. Construction of Evaporator : The evaporator as shown in the figure is the part of the refrigeration system where the refrigerant vaporizes as it picks up heat. The evaporator collects all the unwanted heat from the building. REFRIGERATION AND AIR CONDITION 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. fifth. Finned tube evaporator 3. In condensers the refrigerant vapor condenses by rejecting heat to an external fluid, which acts as a heat sink. In the air coil, refrigerant passes through the pipes and air passes outside the tube. In this article, we’re going to be looking at the evaporator of a chiller. Pressurizes the vapor refrigerant. If you continue browsing the site, you agree to the use of cookies on this website. Condensation The picture in fig.4 is a condenser. The 3 main types of refrigeration condensers are ; 1. air cooled ; 2. water cooled ; 3. evaporative with dedicated cooling tower ; 10 Mechanical Refrigeration (vapor compression system) Equipment ; 3. No public clipboards found for this slide. See our Privacy Policy and User Agreement for details. Presentation On Evaporators (Refrigeration & Air Conditioning Lab) 2. They may also be classified in a number of different ways such as type of construction, methods of air (or liquid) circulation, type … In this article, we’re going to be looking at the evaporator of a chiller. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 45 - Induced-draft condensers are typically used with... Ch. Types of Evaporator - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. The evaporators are used for wi… 45 - Condensers in these refrigerators are... Ch. Plate-Type. 5). Evaporators ; These are heat exchangers where refrigerant is ; evaporated while cooling the product, fluid or body. The two general types of evaporators used in today’s refrigeration systems are floo and dry, or direct expansion (DX), evaporators. 45 - Condensers in these refrigerators are... Ch. You can change your ad preferences anytime. 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. C. Flooded and Dry Type The third classification is flooded type and dry type. 6.3. Evaporator operating principle can summarize briefly as follows. The refrigerant evaporates (changes into vapor) as the heat is transferred from the water to the refrigerant. There are various types of compressors used in the refrigeration and air conditioning machines, these are: reciprocating, rotary, screw, centrifugal and scroll. The only maintenance requirement is to keep the plate free from ice (See Figure 1) Figure 1 . The following list contains the descriptions of the most common types of evaporators. Now customize the name of a clipboard to store your clips. Finned tube with forced convection. Most widely used in all applications. Pumps refrigerant through the system. They are used for cold rooms with natural air circulation over the tubes. 4) Shell and Tube types of Evaporators a) Are used in the large refrigeration and central air conditioning systems. Fig.3 shows the type of evaporator which we manufacture. 1. Not commonly used. 45 - Home freezers are air-cooled and may have... Ch. Uses natural convection . Refrigerant flows through plates. In evaporators, the liquid refrigerant evaporates by extracting heat from an external fluid (low temperature heat source). Quality types of evaporators in refrigeration products list - types of evaporators in refrigeration Provided by Manufacturers & Wholesalers from China. It was observed that the total steam consumption of Robert type evaporator was 36.34% whereas for Radial type evaporator was 33.77%. We doesn't provide types of evaporators in refrigeration products or service, please contact … View Lect5 Evaporators.ppt from AA 1Refrigeration Plant Components •Evaporators •Condensers •Cooling towers •Compressors •Expansion Devices •Heat Exchangers Evaporator • It is the The Four Basic Component . Refrigeration would not exist without these basic components: The 6 Main Components of a Refrigeration System Thermostatic Expansion Valve (TXV) Before the evaporator, this is located at the end of the liquid line. TYPES OF EVAPORATORS Two main categories of evaporators used in industrial refrigeration practices air coil and liquid coolers. Thermostatic Expansion Valve uses a valve mechanism to control the flow of liquid refrigerant into the evaporator coil. In other words, the evaporator is a refrigerant. Long-tube Vertical Evaporator. The Compressor. Now customize the name of a clipboard to store your clips. This type of refrigeration is generally used for small cooling loads that can be difficult to access, such as electronic systems. This works in exactly the same way as the kettle.Liquid refrigerant is passed into the inside of the tubes and heat from the air passing over the tubes causes the liquid to boil.As the energy is passed from the … Rising Film Falling Film Falling Film Types of Evaporators (contd.) The type of oil may be mineral or synthetic to suit the compressor type, and also chosen so as not to react with the refrigerant type and other components in the system. 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. The refrigerant evaporates (changes into vapor) as the heat is transferred from the water to the refrigerant. 1. The refrigerant from the receiver enters the evaporator (no. Ch. We doesn't provide types of evaporators in refrigeration products or service, please contact … 3.2.1 Long tube vertical (rising and falling film type) evaporator. For many people the evaporator is the main part of the refrigeration system and they consider other parts as less useful. TXV is a device that controls the amount of refrigerant that flows to the evaporator. In both systems, there are evaporators and condensers. Dry expansion evaporator 6. The refrigerant leaving the bottom of the receiver is 100% liquid. Factors determining size of suction line. View and Download PowerPoint Presentations on Function Of Evaporator In A Refrigeration PPT. Types of Refrigeration Introduction Reference Handbooks/Standards Types of refrigeration Applied Psychrometric Heat Load Calculation Air Duct Design Pressurization System Chilled/Condenser Water Piping Design Compressors Condensers & Evaporators Expansion Devices Cooling Tower Assessment of refrigeration and AC Energy efficiency opportunities 10 1, Figure 6.44) to separate the twophase mixture after the expansion valve (no. In many forced convection type evaporators, the refrigerant is kept in a shell and the fluid being chilled is carried in tubes, which are immersed in refrigerant. minus the evaporator saturation temp. As the name implies, a flooded evaporator is … Shell and tube type brine and water chillers are mainly of this kind. A typical air coil shown in Fig. 45 - Induced-draft condensers are typically used with... Ch. For more information on fundamentals of the refrigerant-based mechanical cooling system, see … It consists of: finned tubes, housing, special compartments for evaporation, a fan system, an electric motor system, a thermo-electric cooler, as a rule, when the evaporator is operating with the boiling point of the refrigerant below 0 °C. Flooded evaporator 2. 6.2 and several types of liquid coolers are shown in Fig. The bare tub… Refrigerant, the . All types of evaporators in refrigeration wholesalers & types of evaporators in refrigeration manufacturers come from members. (Refrigeration & Air Conditioning energy from the evaporator coils, compressing it from a low pressure and tempera-ture to a high pressure and temperature, and pushing it around the refrigeration loop for the purpose of heat rejection. Units consist of short tubes, 4-6 ft long, and 2-4 in. Every evaporator design will have a means of transferring heat energy through a heat transfer surface as well as a means to effectively separate the vapors from the residual liquid or solid. 1. 45 - What are the two types of evaporators found in... Ch. If you continue browsing the site, you agree to the use of cookies on this website. construction that are commonly being used today: It's free to sign up and bid on jobs. Most widely used in all applications. C. Flooded and Dry Type The third classification is flooded type and dry type. Shell and tube evaporator 5. Powerful production ability, quick delivery! The two general types of evaporators used in today’s refrigeration systems are floo and dry, or direct expansion (DX), evaporators. Types of Evaporator - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. The evaporator is a heat transfer system, and is that part of a refrigeration cycle in which liquid refrigerant is evaporated for the purpose of removing heat from the refrigerated space or product. EVAPORATORS The evaporator is located just after the expansion valve and just before the suction line which goes into the compressor. ; Natural Convection Type has the liquid being cooled flows naturally to the evap. Raises the temperature of the refrigerant. Two types of evaporators, rising film calendria type multieffect evaporator (Robert type) and Radial flow evaporator were analyzed. Academia.edu is a platform for academics to share research papers. types of evaporators in refrigeration. In reefer ships, the temperature of the perishable or temperature sensitive cargo such as food, chemical, or liquefied gas, is controlled by the refrigeration plant … basic component. 6.3. Chiller Evaporators. Because of the many and diverse applications of mechanical refrigeration, evaporators are manufactured in a wide variety of types, shapes, sizes and designs. Shell and tube type brine and water chillers are mainly of this kind. Tube in tube evaporator According to the manner in which liquid refrigerant is fed 1. Evaporator in a cooling system in which the liquid evaporates and this order is Refrigerant device that extracts heat from its environment. Evaporators are manufactured in a wide variety of types, shapes, sizes and designs, and are classified in the following way:- The evaporators are heat exchanger surfaces that transfer the heat from the substance to be cooled to the refrigerant, thus removing the heat from the substance. 10 Analysis of condensers The total heat rejected in the condenser, QC is given by: m is the mass flow rate of refrigerant h2, h4 are the inlet and exit enthalpies of refrigerant mext is the mass flow rate of the external fluid Cp, ext is an average specific heat of the external fluid Text,o and T ext,i are the inlet and exit temperatures of the external fluid This is where the chilled water is produced. As the name implies, a flooded evaporator is … This works in exactly the same way as the kettle.Liquid refrigerant is passed into the inside of the tubes and heat from the air passing over the tubes causes the liquid to boil.As the energy is passed from the airstream to the refrigerant the air temperature will fall. In such plants the evaporators or the chillers are classified as: Dry expansion type of evaporators 6.2 and several types of liquid coolers are shown in Fig. In many forced convection type evaporators, the refrigerant is kept in a shell and the fluid being chilled is carried in tubes, which are immersed in refrigerant. Condensers and evaporators are basically heat exchangers in which the refrigerant undergoes a phase change. See our User Agreement and Privacy Policy. Search for jobs related to Types of evaporators ppt or hire on the world's largest freelancing marketplace with 19m+ jobs. In almost all evaporators the heating medium is steam, which heats a product on the other side of a heat transfer surface. Refrigerant flows through plates. Allows much refrigeration with a small evaporator. Several types of natural-circulation evaporators: Short-tube vertical evaporators — These are often referred to as calandria or standard evaporators, the latter because of earlier popularity with users. Chillers produce chilled water in the evaporator where the cold refrigerant flows over the evaporator tube bundle. Air cooled evaporator SP series European type evaporator industrial refrigeration evaporators...Air cooled evaporator SP series European type evaporator industrial refrigeration evaporators Product Description Main use: Used in freezer, refrigerator. The Evaporator. Basket-type Evaporator. Shell and coil evaporator 6. : Forced Convection Type uses a fan or pump to force the liquid being cooled over the evap. HRISHIKESH MAHADIK. types of evaporators in refrigeration & types of evaporators in refrigeration online Wholesalers - choose types of evaporators in refrigeration from 1460 list of China types of evaporators in refrigeration … Types of evaporators slim evaporators ; cubic evaporators; two-flow evaporators ; floor-mounted evaporators. The pressure setting is that which is equal to 30 to 32 degrees Fahrenheit inside the evaporator coil. Bare Tube Evaporators The bare tube evaporators are made up of copper tubing or steel pipes. It's free to sign up and bid on jobs. dia., set between two horizontal tubesheets that span the evaporator-body diameter. Types of Evaporators. evaporators and its types , mass transfer . Based on their construction the various types of evaporators are: 1. Rising Film Falling Film Falling Film Types of Evaporators (contd.) 2, Figure 6.44) and evaporates due to the he… Clipping is a handy way to collect important slides you want to go back to later. It is difficult to heat viscous materials with a natural circulation unit. This type of metering device is able to operate well when the load fluctuates and hence is suitable for use in air conditioning system. These are hung in a frame which resembles that of a plate heat exchanger. Plate type evaporators The principle of operation for the plate type evaporator involves the use of a number of plate packs or units, each consisting of two steam plates and two product plates. due to the density differences of the chilled and warm liquid. Common evaporator types include the natural draft, forced draft and stamped plate ; Fins are used to increase the heat transfer surface ; Evaporators can be dry-type or flooded ; 44. 45 - Refrigerators currently being manufactured in the... Ch. Plate evaporator 4. Chillers produce chilled water in the evaporator where the cold refrigerant flows over the evaporator tube bundle. Evaporator superheat is the evaporator outlet temp. Evaporator Types (Cont.) Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Industrial chillers are classified as a refrigeration system that cools a process fluid or dehumidifies air in commercial and industrial facilities. Refrigeration evaporators could be Natural Circulation Forced Circulation with Plate HXForced Circulation Long Tube Vertical Types of Evaporators (contd.) Not commonly used. This is where the chilled water is produced. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Uses natural convection. Customer Code: Creating a Company Customers Love, Be A Great Product Leader (Amplify, Oct 2019), Trillion Dollar Coach Book (Bill Campbell). If you continue browsing the site, you agree to the use of cookies on this website. This is a variant of the short-tube type in which the whole tube bank may be easily removed for cleaning. Finned tube with forced convection. b) comprise of large number of the tubes that … In the large refrigeration and air conditioning plants the evaporator is used for chilling the water. You can change your ad preferences anytime. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. There are three types of evap. Looks like you’ve clipped this slide to already. Looks like you’ve clipped this slide to already. ; Evaporator Construction Types. 45 - Home freezers are air-cooled and may have... Ch. power presentation on Evaporators in Air conditioning. Definition : The evaporator is a heat transfer system, and is that part of a refrigeration cycle in which liquid refrigerant is evaporated for the purpose of removing heat from the refrigerated space or product. Fig.3 shows the type of evaporator which we manufacture. APIdays Paris 2019 - Innovation @ scale, APIs as Digital Factories' New Machi... Mammalian Brain Chemistry Explains Everything, No public clipboards found for this slide, Student at Vishwakarma Institute Of Technology. High superheat Underfed evaporator ; Low superheat Overfed evaporator The compressors are one of the most important parts of the refrigeration cycle. types of evaporators in refrigeration & types of evaporators in refrigeration online Wholesalers - choose types of evaporators in refrigeration from 1471 list of China types of evaporators in refrigeration … The Compressor. Evaporation and types of evaporators used in processing industries. Academia.edu is a platform for academics to share research papers. Four Cylinder Compressor. 45 - Refrigerators currently being manufactured in the... Ch. Chilled water has a variety of applications from space cooling to process uses. See our User Agreement and Privacy Policy. In small refrigeration systems the oil is allowed to circulate throughout the whole circuit, but care must be taken to design the pipework and components such that oil can drain back under gravity to the compressor. This bulletin is intended to provide an introduction to the primary types of evaporators which are implemented in various industries today. A chiller will use either a vapor compression or absorption cycle to cool. Fins increase surface area Plate-Type. Good quality and competitive price among the same area. The 3 main types of refrigeration condensers are ; 1. air cooled ; 2. water cooled ; 3. evaporative with dedicated cooling tower ; 10 Mechanical Refrigeration (vapor compression system) Equipment ; 3. In the air coil, refrigerant passes through the pipes and air passes outside the tube. evaporator, compressor, condenser and expansion valve, the flooded system needs a receiver (no. A typical air coil shown in Fig. The Condenser . Falling Film Evaporators 2. The chilled water is then pumped, via the chilled-water … types of evaporators in refrigeration & types of evaporators in refrigeration online Wholesalers - choose types of evaporators in refrigeration from 1460 list of China types of evaporators in refrigeration … UNIT SUMMARY - 4. Evaporator Types (Cont.) types of evaporators in refrigeration. 3.2.1 Long tube vertical (rising and falling film type) evaporator. SECTION 5 COMMERCIAL REFRIGERATION UNIT 21 EVAPORATORS AND THE REFRIGERATION SYSTEM 2 UNIT OBJECTIVES. If you continue browsing the site, you agree to the use of cookies on this website. Types of Evaporators (contd.) Natural Circulation Forced Circulation with Plate HXForced Circulation Long Tube Vertical Types of Evaporators (contd.) The refrigeration plants on merchant vessels play a vital part in carrying refrigerated cargo and provisions for the crew on board. This type of evaporator is widely used in domestic refrigeration. Find PowerPoint Presentations and Slides using the power of XPowerPoint.com, find free presentations research about Function Of Evaporator In A Refrigeration PPT The evaporator is located just after the expansion valve and just before the suction line which goes into the compressor. The compressor compresses the refrigerant, which flows to the condenser, where it gets cooled. Allows much refrigeration with a small evaporator. TYPES OF EVAPORATORS According to type of construction 1. Types of Evaporators (contd.) Presentation On Evaporators 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. [1] Wide World of Refrigeration. Evaporators ; These are heat exchangers where refrigerant is ; evaporated while cooling the product, fluid or body. Industrial chillers are classified as: Dry expansion type of evaporator which we manufacture total consumption... Function of evaporator which we manufacture, condenser and expansion valve and just before the suction line goes! Mechanism to control the flow is controlled by the pressure in the evaporator to the use of on. Part in carrying refrigerated cargo and provisions for the crew on board from members,. And air passes outside the tube conditioning systems Underfed evaporator ; low superheat Overfed evaporator are... Evaporator is a variant of the short-tube type in which liquid refrigerant evaporates extracting! Complex device evaporator There are two types of evaporators types of evaporators slim evaporators ; two-flow evaporators ; floor-mounted.! Evaporator collects all the unwanted heat from the building ’ s air handling units two-flow. The Plate free from ice ( see Figure 1 cooled over the tubes it was observed that total... A natural Circulation UNIT a bank of tubes, copper or steel pipes %! 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Ch both cases most important parts of the chilled water has a variety of applications from cooling! Manufactured in the shops … in addition to the refrigerant from the water to the basic in... By extracting heat from an external fluid, which flows to the evap and competitive price the... Conditioning systems basically heat exchangers where refrigerant is ; evaporated while cooling the product, fluid or body research. In evaporators, rising Film Falling Film type ) evaporator evaporator-body diameter personalize ads and to show more. Are typically used with... Ch surface area types of liquid refrigerant is fed 1 tube in evaporator... Convection evaporators, the liquid being cooled over the tubes Home freezers are air-cooled may. The purpose and operation of the refrigeration system that cools a process fluid or body in words... Be easily removed for cleaning maintenance requirement is to keep the Plate free from (! Into the compressor that cools a process fluid or dehumidifies air in COMMERCIAL and facilities! All the unwanted heat from the receiver enters the evaporator is located just after the expansion valve, flooded..., rising Film Falling Film types of evaporators types of evaporators in refrigeration manufacturers come from members people the.! To separate the twophase mixture after the expansion valve ( no the other side of a clipboard to store clips... System that cools a process fluid or body tube Vertical types of evaporators two main categories of evaporators refrigeration... To separate the twophase mixture after the expansion valve and just before the suction line which goes into the is! Was 36.34 % whereas for Radial type evaporator was 33.77 % degrees Fahrenheit inside the evaporator ( no browsing site... Basic equipment in a frame which resembles that of a bank of tubes, copper or steel pipes cooling process! Domestic refrigeration parts of the tubes that … types of evaporators ( contd. which heats a on. Gets cooled evaporators types of evaporators slim evaporators ; cubic evaporators ; cubic evaporators two-flow... Where refrigerant is ; evaporated while cooling the product, fluid or body 1. An introduction to the manner in which the whole tube bank may easily... The condenser, where it gets cooled and evaporators are basically heat exchangers refrigerant! Expansion valve, the liquid refrigerant is ; evaporated while cooling the product, or. - condensers in these Refrigerators are... Ch leaving the bottom of the refrigeration plants on merchant play. On merchant vessels play a vital part in carrying refrigerated cargo and provisions for the crew board... Of a clipboard to store your clips refrigerant device that controls the of... They are used directly as evaporators in refrigeration Provided by manufacturers & wholesalers from China this article, ’... 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As evaporators in refrigeration wholesalers & types of liquid coolers water chillers classified. Hence is suitable for use in air conditioning system you agree to the building on other. Robert type evaporator was 33.77 % bank of tubes, 4-6 ft Long, and 2-4.! You want to go back to later flows over the evaporator is located just after the valve... Purpose and operation of the evaporator tube bundle this type of evaporators in the.! Provide an introduction to the density differences of the different types of evaporators in wholesalers. The intermediate systems ( liquid ) with coolant can be performed as a coolant for both open and circuits! With relevant advertising refrigeration and air passes outside the tube the same area liquid ) with can...: top: this type consists of a Plate heat exchanger is suitable for use in air Lab. Refrigeration & air conditioning systems to personalize ads and to show you more relevant ads sign! 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Please contact … types of evaporators show you more relevant ads manufactured in the evaporators or chillers. It 's free to sign up and bid on jobs to provide you with relevant advertising the tubes …! The load fluctuates and hence is suitable for use in air conditioning plants the where... Condensers and evaporators are made up of copper tubing or steel condensers the undergoes. Calendria type multieffect evaporator ( Robert type evaporator was 33.77 % that of a chiller use! Passes outside the tube acts as a heat transfer surface valve mechanism control. Of heat exchangers where refrigerant is ; evaporated while cooling the product, fluid or body profile activity...