Specifically glycol is a short form for propylene glycol that is an antifreeze. The liquid is evaporated at the outside of the tubes. Flooded Evaporators. – Identify cascade and multiple-staging refrigeration systems. This is a variant of the short-tube type in which the whole tube bank may be easily removed for cleaning. – List the main types of flooded evaporators. ... stamped evaporator, multicircuit, finned tube bare pipe, liquid heat exchangers, drum type evaporator, plate type evaporator in a tank, pipe in pipe evaporator. – Explain the process of secondary refrigeration. Types of Refrigeration • Vapour Compression Refrigeration (VCR): uses mechanical energy • Vapour Absorption Re frigeration (VAR): uses thermal energy Vapour Compression Refrigeration • Highly compressed flu ids tend to get colder when allowed to expand • If pressure high enough CLASSIFICATION OF REFRIGERATION SYSTEM. Description: ICE 59 Motors are primarily used in the evaporator of commercial refrigeration walk-in coolers and freezers, but can be used in many applications demanding high efficiency and dependability with output ratings up to 7.6 watts. In other words, the evaporator is a refrigerant. Forced Circulation Evaporators 4. 3.2 Different Types of Evaporators By evaporation Method: Natural evaporation: The solution at below the boiling point temperature evaporation, such as seawater drying, in this case, because solvents only on the surface of the solution vaporization, solvent vaporization rate is low. This lecture covers the various types of refrigeration that are available. It is here that the liquid refrigerant is expanded and evaporated. Evaporator. TYPES OF EVAPORATORS According to type of construction 1. Vapor Compression Cycle 2. (b) Finned tube or extended surface type evaporator. Liquid refrigerant (dark red), flows through the thermostatic valves for evaporators. Evaluate evaporator coil performance criteria. Expanding flow evaporator. Some commercial refrigeration systems have one condensing unit, associated with two or more evaporators, Fig. (f) Tube in tube evaporator. The absorber consists of a homogeneous mixture of ammonia and water known as aqua ammonia. Glycol Refrigeration Systems. the various types of refrigeration systems in common use along with their relative advantage and disadvantages, and to improve the performances of these systems. Flooded evaporator 2. Presentation On Evaporators (Refrigeration & Air Conditioning Lab) 2. The evaporators may be classified into a forced convection type or natural convection type, depending on whether the substance to be cooled lows naturally by difference in density through the heat transfer surfaces of the evaporator or forced by pump or fan. Shell and coil evaporator 6. However, the focus is on the most common type of refrigeration used in breweries: vapor compression refrigeration. Shell and tube evaporator 5. Glycol refrigeration system uses an external pump to deliver glycol solution to the evaporator coils to cool refrigerated cases. 1. It is connected between the receiver and the evaporator. Evaporators are manufactured in a wide variety of types, shapes, sizes and designs, and are classified in the following way:- ; Natural Convection Type has the liquid being cooled flows naturally to the evap. > As a professional refrigeration supplier, we manufacturer different types of evaporator and condenser, include the most popular ceiling type DD, DL, DJ evaporator, Dual discharge evaporator,small-sized evaporator, NH condenser, V type, U type, and W type condensers. The two general types of evaporators used in today’s refrigeration systems are flooded evaporators and dry, or direct expansion (DX), evaporators. (d) Shell and tube evaporator. Tube in tube evaporator According to the manner in which liquid refrigerant is fed 1. Evaporator operating principle can summarize briefly as follows. Plate Evaporators 5. Evaporator in a cooling system in which the liquid evaporates and this order is Refrigerant device that extracts heat from its environment. – Compare and contrast dry-expansion and flooded evaporators. – Define eutectic solution and eutectic temperature. The reason for refrigeration is to remove heat from air, water or other substance. 3-10, repeated (two or more) evaporator refrigeration systems are usually used in commercial refrigeration systems. In the thermosyphon evaporator design, the inside of the tubes are flooded with refrigerant, and the process fluid is on the shell side. Basket-type Evaporator. Horizontal Film Evaporators. Evaporator is an important component together with other major components in a refrigeration system such as compressor, condenser and expansion device. horizontal type, vertical shell-and-tube type evaporators require less floor area. Start studying Unit 21 Evaporators and the refrigeration system. The chilled water enters from the top and flows downwards due to gravity and is then taken to a pump, which circulates it to the refrigeration load. pressure side of a refrigeration system. This type of evaporator is used mainly in applications for seawater desalination and refrigeration technology. We can also customize the evaporator and condenser for you. The refrigeration cycle in a chiller consists of four key components: compressor, condenser, expansion valve, and evaporator as illustrated below. Plate evaporator 4. 5.2 VAPOUR COMPRESSION SYSTEMS The challenge in refrigeration and air conditioning is to remove heat from a low temperature source and dump it at a higher temperature sink. Learn vocabulary, terms, and more with flashcards, games, and other study tools. 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. Objectives After studying this unit, you should be able to describe various types of compressor, describe various types of condenser, describe various types of evaporator, and describe various types of expansion device. Dry expansion evaporator 6. Compared to horizontal type, vertical shell-and-tube type evaporators require less floor area. Thermosyphon Evaporator. Types of Evaporators Different types of evaporators are used in different types of refrigeration applications and accordingly they have different designs. 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. 2. The chilled water enters from the top and flows downwards due to gravity and is then taken to a pump, which circulates it to the refrigeration load. There are 2 types of Refrigeration cycles: 1. Due to various advantages and flexibility … Refrigeration and Air Conditioning Training Course Evaporators and System Components 38 hours, 38 NATE CEHs, 3.8 CEUs – 360 pages Page 1 of 4 Lesson 1 - Refrigeration Evaporators Objectives: Identify various types of evaporators. Long-tube Vertical Evaporator. Classification of Evaporators: There are many types of evaporator, these are classified as: (1) According to the type of construction : (a) Bare tube coil evaporator. Condenser is a heat exchanger that transfers heat from the refrigerant gas to an external cooling source (water or air are typical mediums). Beijer Refrigeration JSC represents manufacturers like Danfoss (we are the only one authorized Danfoss representative in refrigeration and air conditioning area), Bitzer, Carel, Armacell, Frascold, Carrier, Refco and many others factories and suppliers.. We offer a wide range of over 25,000 items of refrigeration equipment products. (c) Plate type evaporator. [1] Wide World of Refrigeration. Evaporator Types The two general types of evaporators used in today’s refrigeration systems are flooded evaporators and dry, or direct expansion (DX), evaporators. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The major use of this system is in beverage industry. As the name implies, a flooded evaporator is always filled with liquid refrigerant. : Forced Convection Type uses a fan or pump to force the liquid being cooled over the evap. ; Evaporator Construction Types. In the absorber, the vapor is absorbed and released from the absorbent, which … 1. Finned tube evaporator 3. There are two types of evap. Start studying Unit 21 Evaporators and the refrigeration system. construction that are commonly being used today: Thermosyphon evaporators (figure 3) are a common choice for large and small batch-type refrigeration loads where the process fluid is clean but viscous (viscosity greater than 6 cP). available today. Rising Film Evaporators 3. 9/8/2019 Types of Evaporators: Bare Tube, Plate Evaporators, Finned Evaporators 5/21 Sponsored Content Recommended by Plate types of evaporators provide excellent shelves in the freezers and similar applications. This type of refrigeration is generally used for small cooling loads that can be difficult to access, such as electronic systems. Bare tube coil evaporator 2. The following list contains the descriptions of the most common types of evaporators. They can be used as the as the partitions in the freezers, frozen food display cases, ice cream cabinets, soda fountains others. In this type of refrigeration system, the vapor produced in the evaporator passes into the absorber. due to the density differences of the chilled and warm liquid. The evaporator, the compressor, the condenser, and a flow-metering device such as an expansion valve. Falling Film Evaporators 2. In almost all evaporators the heating medium is steam, which heats a product on the other side of a heat transfer surface. 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 evaporators can be classified in various ways depending on the construction of the evaporator, the method of feeding the refrigerant, the direction of circulation of the air around the evaporator, etc. – Describe three types of multiple-evaporator systems. 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. Flooded Evaportators As the name implies, a flooded evaporator is always filled with liquid refrigerant. There are three types of evap. Absorption Cycle Vapor Compression Cycle During the compression cycle, the refrigerant passes through four major components within the chiller. 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). Evaporator Types. Mechanical Features: Type: 3.3” Presentation on evaporators 1. To satisfy the wide spectrum of process requirements, GEA designs solutions with all types of evaporators. (e) Shell and coil evaporator. Select proper fin spacing for a particular application. 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