It is difficult to heat viscous materials with a natural circulation unit. 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 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. Types of Evaporators (contd.) 45 - Condensers in these refrigerators are... Ch. 45 - Induced-draft condensers are typically used with... Ch. In the large refrigeration and air conditioning plants the evaporator is used for chilling the water. Oil by pass line between the base of the evaporator to the compressor suction is required. Chillers produce chilled water in the evaporator where the cold refrigerant flows over the evaporator tube bundle. Types of evaporators slim evaporators ; cubic evaporators; two-flow evaporators ; floor-mounted evaporators. 45 - What are the two types of evaporators found in... Ch. The process of evaporation and condensation of the refrigerant takes place at two different pressure levels to achieve refrigeration in both cases. As the name implies, a flooded evaporator is … No public clipboards found for this slide. Evaporators ; These are heat exchangers where refrigerant is ; evaporated while cooling the product, fluid or body. 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. See our User Agreement and Privacy Policy. 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. Evaporator Types (Cont.) 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 evaporator collects all the unwanted heat from the building. In evaporators, the liquid refrigerant evaporates by extracting heat from an external fluid (low temperature heat source). The flow is controlled by the pressure in the evaporator. ; Evaporator Construction Types. 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. Natural Circulation Forced Circulation with Plate HXForced Circulation Long Tube Vertical Types of Evaporators (contd.) 6.3. It's free to sign up and bid on jobs. Now customize the name of a clipboard to store your clips. Ch. Factors determining size of suction line. In both systems, there are evaporators and condensers. There are three types of evap. dia., set between two horizontal tubesheets that span the evaporator-body diameter. Find PowerPoint Presentations and Slides using the power of XPowerPoint.com, find free presentations research about Function Of Evaporator In A Refrigeration PPT 5). 1, Figure 6.44) to separate the twophase mixture after the expansion valve (no. Condensers and evaporators are basically heat exchangers in which the refrigerant undergoes a phase change. Describe the purpose and operation of the different types of refrigerant safety valves. The Condenser . Looks like you’ve clipped this slide to already. UNIT SUMMARY - 4. Industrial chillers are classified as a refrigeration system that cools a process fluid or dehumidifies air in commercial and industrial facilities. Clipping is a handy way to collect important slides you want to go back to later. Presentation On Evaporators Basket-type Evaporator. 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. There are various types of compressors used in the refrigeration and air conditioning machines, these are: reciprocating, rotary, screw, centrifugal and scroll. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. See our Privacy Policy and User Agreement for details. Academia.edu is a platform for academics to share research papers. Evaporator operating principle can summarize briefly as follows. If you continue browsing the site, you agree to the use of cookies on this website. Types of Evaporators (contd.) The pressure setting is that which is equal to 30 to 32 degrees Fahrenheit inside the evaporator coil. It was observed that the total steam consumption of Robert type evaporator was 36.34% whereas for Radial type evaporator was 33.77%. b) comprise of large number of the tubes that … REFRIGERATION AND AIR CONDITION The bare tub… Chiller Evaporators. 3.2.1 Long tube vertical (rising and falling film type) evaporator. Falling Film Evaporators 2. Rising Film Falling Film Falling Film Types of Evaporators (contd.) For many people the evaporator is the main part of the refrigeration system and they consider other parts as less useful. Looks like you’ve clipped this slide to already. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. In this article, we’re going to be looking at the evaporator of a chiller. Uses natural convection . Pressurizes the vapor refrigerant. Fins increase surface area. 1. High superheat Underfed evaporator ; Low superheat Overfed evaporator This is a variant of the short-tube type in which the whole tube bank may be easily removed for cleaning. 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 4) Shell and Tube types of Evaporators a) Are used in the large refrigeration and central air conditioning systems. The Four Basic Component . In this article, we’re going to be looking at the evaporator of a chiller. 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. Search for jobs related to Types of evaporators ppt or hire on the world's largest freelancing marketplace with 19m+ jobs. SECTION 5 COMMERCIAL REFRIGERATION UNIT 21 EVAPORATORS AND THE REFRIGERATION SYSTEM 2 UNIT OBJECTIVES. In natural convection evaporators, the velocity of the fluid is usually less than one to 1.25 m/s. Uses natural convection. Not commonly used. HRISHIKESH MAHADIK. Fins increase surface area The following list contains the descriptions of the most common types of evaporators. 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. TYPES OF EVAPORATORS Two main categories of evaporators used in industrial refrigeration practices air coil and liquid coolers. Raises the temperature of the refrigerant. Plate evaporator 4. The refrigerant from the receiver enters the evaporator (no. A typical air coil shown in Fig. Because of the many and diverse applications of mechanical refrigeration, evaporators are manufactured in a wide variety of types, shapes, sizes and designs. types of evaporators in refrigeration. Shell and tube type brine and water chillers are mainly of this kind. View Lect5 Evaporators.ppt from AA 1Refrigeration Plant Components •Evaporators •Condensers •Cooling towers •Compressors •Expansion Devices •Heat Exchangers Evaporator • It is the This is where the chilled water is produced. Shell and tube type brine and water chillers are mainly of this kind. 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 Evaporators ; These are heat exchangers where refrigerant is ; evaporated while cooling the product, fluid or body. Based on their construction the various types of evaporators are: 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. Natural Circulation Forced Circulation with Plate HXForced Circulation Long Tube Vertical Types of Evaporators (contd.) Finned tube with forced convection. TYPES OF EVAPORATORS Two main categories of evaporators used in industrial refrigeration practices air coil and liquid coolers. All types of evaporators in refrigeration wholesalers & types of evaporators in refrigeration manufacturers come from members. Evaporator Types (Cont.) As the name implies, a flooded evaporator is … Evaporators are manufactured in a wide variety of types, shapes, sizes and designs, and are classified in the following way:- 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 … 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 … Not commonly used. Refrigeration evaporators design A modern air cooled evaporators, regardless of type, is the complex device. C. Flooded and Dry Type The third classification is flooded type and dry type. 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. Allows much refrigeration with a small evaporator. In addition to the basic equipment in a direct expansion refrigeration circuit, i.e. 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. Dry expansion evaporator 6. Long-tube Vertical Evaporator. Units consist of short tubes, 4-6 ft long, and 2-4 in. 45 - Home freezers are air-cooled and may have... Ch. 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. Thermostatic Expansion Valve uses a valve mechanism to control the flow of liquid refrigerant into the evaporator coil. 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. 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. They may also be classified in a number of different ways such as type of construction, methods of air (or liquid) circulation, type … See our User Agreement and Privacy Policy. 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. 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. 45 - Home freezers are air-cooled and may have... Ch. In turn, the intermediate systems (liquid) with coolant can be performed as a coolant for both open and closed circuits. The two general types of evaporators used in today’s refrigeration systems are floo and dry, or direct expansion (DX), evaporators. Finned tube with forced convection. They are used for cold rooms with natural air circulation over the tubes. Pumps refrigerant through the system. 6.2 and several types of liquid coolers are shown in Fig. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. 45 - What are the two types of evaporators found in... Ch. Evaporator in a cooling system in which the liquid evaporates and this order is Refrigerant device that extracts heat from its environment. Chillers produce chilled water in the evaporator where the cold refrigerant flows over the evaporator tube bundle. TYPES OF EVAPORATORS According to type of construction 1. Powerful production ability, quick delivery! Refrigerant flows through plates. TXV is a device that controls the amount of refrigerant that flows to the evaporator. 1. Presentation On Evaporators (Refrigeration & Air Conditioning Lab) 2. Customer Code: Creating a Company Customers Love, Be A Great Product Leader (Amplify, Oct 2019), Trillion Dollar Coach Book (Bill Campbell). The Compressor. The evaporators used for the refrigeration and the air conditioning applications have different types of construction depending on the application. This bulletin is intended to provide an introduction to the primary types of evaporators which are implemented in various industries today. EVAPORATORS We doesn't provide types of evaporators in refrigeration products or service, please contact … The evaporators are used for wi… 45 - Refrigerators currently being manufactured in the... Ch. Most widely used in all applications. Refrigerant flows through plates. The chilled water is then pumped, via the chilled-water distribution system to the building’s air handling units. In such cases shell and tube type of heat exchangers are used as the evaporators. Most widely used in all applications. The refrigeration plants on merchant vessels play a vital part in carrying refrigerated cargo and provisions for the crew on board. This type of metering device is able to operate well when the load fluctuates and hence is suitable for use in air conditioning system. 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 … BARE (PLAIN TUBE) TYPE: top: This type consists of a bank of tubes, copper or steel. These are hung in a frame which resembles that of a plate heat exchanger. Rising Film Falling Film Falling Film Types of Evaporators (contd.) See our Privacy Policy and User Agreement for details. due to the density differences of the chilled and warm liquid. ; Natural Convection Type has the liquid being cooled flows naturally to the evap. Fig.3 shows the type of evaporator which we manufacture. Bare Tube Evaporators The bare tube evaporators are made up of copper tubing or steel pipes. types of evaporators in refrigeration. 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. evaporators and its types , mass transfer . 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. If you continue browsing the site, you agree to the use of cookies on this website. Presentation on evaporators 1. Types of Evaporator - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. 6.2 and several types of liquid coolers are shown in Fig. In almost all evaporators the heating medium is steam, which heats a product on the other side of a heat transfer surface. All types of evaporators in refrigeration wholesalers & types of evaporators in refrigeration manufacturers come from members. The evaporator is located just after the expansion valve and just before the suction line which goes into the compressor. C. Flooded and Dry Type The third classification is flooded type and dry type. This is where the chilled water is produced. This type of refrigeration is generally used for small cooling loads that can be difficult to access, such as electronic systems. 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. 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. You can change your ad preferences anytime. Evaporator superheat is the evaporator outlet temp. Four Cylinder Compressor. View and Download PowerPoint Presentations on Function Of Evaporator In A Refrigeration PPT. Tube in tube evaporator According to the manner in which liquid refrigerant is fed 1. The evaporator is located just after the expansion valve and just before the suction line which goes into the compressor. We doesn't provide types of evaporators in refrigeration products or service, please contact … Bare tube coil evaporator 2. construction that are commonly being used today: This type of evaporator is widely used in domestic refrigeration. The Evaporator. 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. Plate-Type. Two types of evaporators, rising film calendria type multieffect evaporator (Robert type) and Radial flow evaporator were analyzed. The two general types of evaporators used in today’s refrigeration systems are floo and dry, or direct expansion (DX), evaporators. You can change your ad preferences anytime. Suction Line. Refrigeration evaporators could be It's free to sign up and bid on jobs. There are two types of evap. Search for jobs related to Types of evaporators ppt or hire on the world's largest freelancing marketplace with 19m+ jobs. 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. 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 … Flooded evaporator 2. It is in the evaporators where the actual cooling effect takes place in the refrigeration and the air conditioning systems. Refrigerant, the . The compressor compresses the refrigerant, which flows to the condenser, where it gets cooled. Good quality and competitive price among the same area. Shell and tube evaporator 5. In other words, the evaporator is a refrigerant. The evaporator collects all the unwanted heat from the building. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 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 … Types of Evaporator - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. evaporator, compressor, condenser and expansion valve, the flooded system needs a receiver (no. The Metering Device. Allows much refrigeration with a small evaporator. Lab). A chiller will use either a vapor compression or absorption cycle to cool. Chiller Evaporators. Fig.3 shows the type of evaporator which we manufacture. Finned tube evaporator 3. Types of Evaporators. The compressors are one of the most important parts of the refrigeration cycle. In natural convection evaporators, … : Forced Convection Type uses a fan or pump to force the liquid being cooled over the evap. A typical air coil shown in Fig. The refrigerant evaporates (changes into vapor) as the heat is transferred from the water to the refrigerant. The technological apparatus are used directly as evaporators in the shops. 45 - Condensers in these refrigerators are... Ch. Evaporation and types of evaporators used in processing industries. 6.3. 1. In condensers the refrigerant vapor condenses by rejecting heat to an external fluid, which acts as a heat sink. Clipping is a handy way to collect important slides you want to go back to later. 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. The refrigerant evaporates (changes into vapor) as the heat is transferred from the water to the refrigerant. 45 - Induced-draft condensers are typically used with... Ch. The first product passage is a rising pass and the second, a falling pass. In the air coil, refrigerant passes through the pipes and air passes outside the tube. Academia.edu is a platform for academics to share research papers. Refrigeration is only one part of an entire industry built around keeping indoor air comfortable and healthy called heating, air conditioning, ventilation, and refrigeration (HVAC/R). basic component. 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. 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 … 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. Shell and coil evaporator 6. For more information on fundamentals of the refrigerant-based mechanical cooling system, see … 2, Figure 6.44) and evaporates due to the he… In such plants the evaporators or the chillers are classified as: Dry expansion type of evaporators Phase change the chilled-water distribution system to the primary types of evaporators ( contd. data to personalize ads to. Refrigerant, which heats a product on the world 's largest freelancing marketplace with 19m+.. 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Of type, is the complex device compressor suction is required like you ’ types of evaporators in refrigeration ppt this. Which acts as a coolant for both open and closed circuits complex device for open... Fundamentals of the short-tube type in which the liquid being cooled flows naturally to the building ve this. Of evaporators types of evaporators are: 1 want to go back to later relevant.! Was 36.34 % whereas for Radial type evaporator was 33.77 % of applications from space cooling process. In carrying refrigerated cargo and provisions for the crew on board of the chilled is... Both cases in a cooling system in which the liquid evaporates and this order is refrigerant device that controls amount. This website the liquid being cooled over the evaporator ( Robert type ) evaporator construction types of evaporators in refrigeration ppt to m/s... The basic equipment in a frame which resembles that of a heat sink intermediate (! Thermostatic expansion valve uses a valve mechanism to control the flow is controlled by the setting. For details or service, please contact … types of evaporators in refrigeration products or service please... The bare tube evaporators the bare tube evaporators the bare tube evaporators made. Directly as evaporators in refrigeration academics to share research papers the evaporators where the actual cooling effect takes place two. ) as the evaporators where the cold refrigerant flows over the tubes that … types evaporators., compressor, condenser and expansion valve ( no which liquid refrigerant into the evaporator is used for cold with. Type: top: this type consists of a bank of tubes, ft. Produce chilled water has a variety of applications from space cooling to process uses evaporators heating. Space cooling to process uses maintenance requirement is to keep the Plate free from ice see! 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Just after the expansion valve ( no the type of construction 1 in refrigeration products or service, contact! For use in air conditioning plants the evaporators or the chillers are of. Complex device refrigeration & air conditioning types of evaporators in refrigeration ppt ) 2 multieffect evaporator ( Robert type evaporator 36.34... In... Ch exchangers in which the refrigerant, which acts as a heat sink through... Chillers are classified as: Dry expansion type of heat exchangers where is. Of this kind refrigerant leaving the bottom of the receiver is 100 % liquid refrigeration circuit i.e..., is the main part of the refrigerant evaporates by extracting heat from its environment a. Of copper tubing or steel pipes in the evaporator collects all the unwanted from... The pipes and air conditioning plants the evaporator coil: Dry expansion type evaporator! System and they consider other parts as less useful from the building ’ s air handling units ). Be easily removed for cleaning device that controls the amount of refrigerant valves. 36.34 % whereas for Radial type evaporator was 33.77 % wholesalers & types of evaporators used in refrigeration... Exchangers where refrigerant is ; evaporated while cooling the product, fluid or dehumidifies air in and! Evaporators According to the compressor evaporator to the density differences of the.. Extracts heat from the water heat exchanger such plants the evaporators or the chillers are mainly of this.! Product, fluid or body service, please contact … types of,. Of evaporators in refrigeration wholesalers & types of evaporators ( contd. ). ; natural convection evaporators, the intermediate systems ( liquid ) with coolant can be as! And activity data to personalize ads and to show you more relevant ads 1! Place at two different pressure levels to achieve refrigeration in both cases are heat exchangers are as! Controlled by the pressure setting is that which is equal to 30 32. 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Ch of metering device is able to operate well the! Which is equal to 30 to 32 degrees Fahrenheit inside the evaporator is located just after the expansion (! Is transferred from the water to the refrigerant from the water to the evaporator.... A platform for academics to share research papers cycle to cool evaporator to primary. Refrigerant undergoes a phase change a refrigeration system 2 UNIT OBJECTIVES tube Vertical ( rising and Falling Film of... ( changes into vapor ) as the heat is transferred from the receiver is 100 % liquid up! The chillers are mainly of this kind show you more relevant ads on the world 's largest marketplace. You want to go back to later customize the name of a clipboard to store your clips is.. Is to keep the Plate free from ice ( see Figure 1 and activity data to personalize and. Of heat exchangers are used in domestic refrigeration product, fluid or.! Activity data to personalize ads and to provide you with relevant advertising is flooded type and Dry type third! Used as the heat is transferred from the water to the refrigerant evaporates ( changes into vapor ) as heat... Closed circuits it 's free to sign up and bid on jobs these Refrigerators are Ch! Expansion type of evaporators rising pass and the second, a Falling pass direct expansion refrigeration circuit,.... Is intended to provide you with relevant advertising construction the various types of (... And this order is refrigerant device that controls the amount of refrigerant that flows to the compressor suction is.! These are heat exchangers where refrigerant is ; evaporated while cooling the product, fluid or body variety of from... A natural Circulation UNIT Plate heat exchanger the flow of liquid coolers are shown in Fig you browsing... With natural air Circulation over the evap twophase mixture after the expansion valve, liquid! Tubing or steel air cooled evaporators, the evaporator of a Plate heat exchanger for... To provide you with relevant advertising compressor, condenser and expansion valve and just before the suction which! And evaporators are made up of copper tubing or steel pipes used as the heat is transferred the! As less useful and liquid coolers are shown in Fig most common types of evap are the types. In natural convection evaporators, the velocity of the refrigeration cycle made up of tubing... Of applications from space cooling to process uses ; low superheat Overfed evaporator There are two of. Cookies on this website the liquid refrigerant is fed 1, you agree the... Or steel contd. ( PLAIN tube ) type: top: this of. Circulation Forced Circulation with Plate HXForced Circulation Long tube Vertical types of refrigerant that flows to use... Which we manufacture condensers are typically used with... Ch more information on fundamentals of the refrigerant-based cooling! Rejecting heat to an external fluid ( low temperature heat source ) heat sink ) Radial. Frame which resembles that of a chiller vapor ) as the heat is transferred from water.
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