Heat exchangers are used to transfer heat from one fluid to another.
The standard plate heat exchangers have a total of four inlet-outlet ports, two of which are the inlet and outlet of the heating fluid and the other two of the fluid to be heated. In counter flow heat exchangers the fluids enter the exchanger from opposite ends. It is also possible to produce heat exchangers with more than one heater or heating fluid with customized production.
Over the years, all parts of a commercial refrigerator, such as the compressor, heat exchangers, refrigerant, and packaging, have been improved considerably due to the extensive research and development efforts carried out by academia and industry. # F! " Counter flow heat exchangers 4. Heat exchangers are classified according to transfer processes into indirect- and direct-contact types. SHELL & TUBE HEAT EXCHANGERS, PART I – Instructor: Javier Tirenti Page 11 An alternative to the fatigue analysis according to the provisions of Part 5 Div.2 is FEA. • A very durable heat exchanger that excels at handling aggressive and fouling media. 1 Fluidized-bed heat exchanger.
18. 1 F !!! " Heat Exchangers DOE-HDBK-1018/1-93 TYPES OF HEAT EXCHANGERS. Effectiveness 5. The basic component of a heat exchanger can be viewed as a tube with one fluid running through it and another fluid flowing by on the outside. [PDF] Download Sadik Kakac, Hongtan Liu and Anchasa Pramuanjaroenkij by Heat Exchangers: Selection, Rating, and Thermal Design. A basic understanding of the % % Co u n t er %F l o w %H E %!!!!! 1.2.1 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. Heat exchangers are devices used to transfer heat between two or more fluid streams at different temperatures. 5 Heat Exchangers The general function of a heat exchanger is to transfer heat from one fluid to another. Heat exchangers are classified according to • Transfer process • Number of fluids • Degree of surface contact • Design features • Flow arrangements • Heat transfer mechanisms. The counter flow design is most efficient, in that it can transfer the most heat from the heat transfer medium. Heat Exchangers: Selection, Rating, and Thermal Design written by Sadik Kakac, Hongtan Liu and Anchasa Pramuanjaroenkij is very useful for Mechanical Engineering (MECH) students and also who are all having an interest to develop their knowledge in the field of … I only found out how important they were after covering a Fig. NTU 6. = 1 F ! " Parallel flow heat exchangers 3. # 1 F !! In almost any nuclear, chemical, or mechanical system, heat must be transferred from one place to another or from one fluid to another. # F! " Heat exchanger description 2. Though Heat Exchangers have very simple functioning, they are quintessential to most mechanical engines. Agenda 1. Phase Change
They work around us all the time: in cars, radiators, air conditioners, and so on. Fig. This latter method is being used more and more nowadays. SondBlock heat exchangers are also good choices as steam heaters or reboilers for non-cyclic duties, and a smooth and stable steam control system. TYPES OF HEAT EXCHANGERS. 2 Heat transfer surface area density spectrum of Able to handle aggressive media on both # 1
Combining each of these resistances in series gives: 1 UA = 1 (ηohA)i 1 Skw 1 (ηohA)o (5.7) where η0 is the surface efficiency of inner and outer surfaces, h is the heat transfer coefficients for the …
Heat Exchangers 73 individual thermal resistances of the system.