Types Of Heat Exchangers Pdf
The ratio of the heat transfer surface area of a heat exchanger to its volume is called the area density β. In static regenerators also known as fixed bed regenerators the heat exchanger material and components remains stationary as fluids flow through the device while in dynamic regenerators the material and components move throughout the heat transfer process.
1 UA 1 ηohAi 1 Skw 1 ηohAo 57 where η0 is the surface efficiency of inner and outer surfaces h is the heat transfer coefficients for the inner and outer surfaces and S is a shape factor for the wall.
Types of heat exchangers pdf. In parallel flow both the hot and cold fluids enter the heat exchanger at the same end and move in the same direction. Figure 1 Tube and Shell Heat Exchanger. Surface condenser is a type of heat exchanger mostly used in thermal power stations.
A plate type heat exchanger as illustrated in Figure 2 consists of plates instead of tubes to separate the hot and cold fluids. Fixed tube-sheet exchanger non-removable tube bundle. They allow high heat transfer rates between fluids in a small volume.
There are two main types of regenerative heat exchangersstatic heat exchangers and dynamic heat exchangers. 121 Indirect-Contact Heat Exchangers In an indirect-contact heat exchanger the fluid streams remain separate and the heat transfers continuously through an impervious dividing wall or into and out of a wall in a transient manner. The common types of shell and tube exchangers are.
This heat exchanger consists of two concentric pipes of different diameters. Baffles direct the flow of fluid between plates. Parallel Flow Heat Exchanger 2.
Heat exchangers are classified according to transfer processes into indirect- and direct-contact types. Heat Exchangers DOE-HDBK-10181-93 TYPES OF HEAT EXCHANGERS. Double-pipe heat exchanger one fluid flows through the smaller pipe while the other fluid flows through the annular space between the two pipes.
Configuration Typical value K Wm 2 K Typical range K Wm 2 K Gas-to-gas heat exchanger at normal pressure 20 550 Gas-to-gas heat exchanger at high pressure 200 50500 Liquid-to-gas or gas-to-liquid heat exchanger 50 10100 Liquid-to-liquid tubular heat exchanger 1000 2002000 Liquid-to-liquid plate heat exchanger 2500 5005000 Condenser to a gas 50 10100 Condenser to a liquid 3000 5006000 Vaporiser to a gas 50 10100 Vaporiser to a liquid 5000 50010 000 Vaporiser. Heat exchangers are typically classified according to flow arrangement and type of construction. Counter Flow Heat Exchanger.
Heat Exchangers 73 individual thermal resistances of the system. This type of heat exchanger is designed to allow a large heat transfer surface area per unit volume. Data are available for.
The simplest and cheapest type of shell and tube exchanger is with fixed tube sheet design. The hot and cold fluids alternate between each of the plates. The two main types of heat exchangers that exist.
Heat exchangers have widespread industrial and domestic applications. Combining each of these resistances in series gives. In this type of exchangers the tube sheet is welded to the shell and no relative movement between the.
The simplest heat exchanger is one for which the hot and cold fluids move in the same or opposite directions. Plate heat exchangers also differ in the types of plates that are used and in the configurations of those plates. Process Design of Heat Exchanger.
There are many types of permanently bonded plate heat exchangers such as dip-brazed vacuum-brazed and welded plate varieties and they are often specified for closed-loop applications such as refrigeration. Car radiator human lung am0ongest others. Chap 23 Heat Exchangers 23-1 Chapter 23 HEAT EXCHANGERS Types of Heat Exchangers 23-1C Heat exchangers are classified according to the flow type as parallel flow counter flow and cross-flow arrangement.
This type of heat exchanger consists of a set of tubes in a container called a shell. Heat exchangers have widespread industrial and domestic applications. These are water cooled condensers and.
C Plate heat exchangers with stainless steel titanium or Hastelloy plates. SHELL AND TUBE HEAT EXCHANGER. Types of heat exchangers Shell and tube type The most basic and the most common type of heat exchanger construction is the shell and tube type.
Parallel Flow Heat Exchanger In parallel flow heat exchangers the two mediums enter the exchanger at the same end and travel in parallel to one another to the other side. Types of Heat exchanger process design of shell and tube heat exchanger condenser and reboilers Ranjeet Khebude Both the tube bundle and the shell side can be inspected and cleaned mechanicallyTo provide the floating-head cover it is necessary to bolt it to the tube sheet. A heat exchanger is a heat transfer device that exchanges heat between two or more process fluids.
A heat exchanger is a heat transfer device that exchanges heat between two or more process fluids. DIFFERENT TYPES OF HEAT EXCHANGER. AParallel flow the hot and cold fluids enter the same end flow in the same direction and leave at the same end.
A Shell and tube exchangers with a variety of materials of construction including graphite tubes. Heat exchangers with β 700 are classified as compact heat exchanger eg. Double-pipe heat exchanger parallel flow.
Amongst of all type of exchangers shell and tube exchangers are most commonly used heat exchange equipment. B Air cooled heat exchangers with a variety of tube materials.
.jpg)
