Presentation on theme: "Type of Heat Exchangers By Cao Yu, Marcus, Ray Yan."— Presentation transcript:
Type of Heat Exchangers By Cao Yu, Marcus, Ray Yan
What is heat exchanger?
Common uses space heating refrigeratio n air conditionin g power plants chemical plants Petroche mical plants petroleum refineries natural gas processin g
Type of Heat Exchanger Type of Heat Exchanger 1 Shell and tube heat exchanger 2 Plate heat exchanger 3 Regenerative heat exchanger 4 Adiabatic wheel heat exchanger 5 Plate Fin heat exchanger 6 Fluid heat exchangers
Type of Heat Exchangers 7 Waste Heat Recovery Units 8 Dynamic scraped surface heat exchanger 9 Phase-change heat exchangers
Shell and tube heat exchanger
It is the most common type of heat exchanger in oil refineries and other large chemical processes, is suited for higher-pressure applications. consists of a shell with a bundle of tubes inside it.
Shell and tube heat exchanger One fluid runs through the tubes, and another fluid flows over the tubes to transfer heat between the two fluids. The set of tubes is called a tube bundle, and may be composed by several types of tubes: plain, longitudinally finned, etc. For more details, please kindly refer to group 2 presentation. :D
Plate heat exchanger
uses metal plates to transfer heat between two fluids. major advantage is that fluids are exposed to a much larger surface area because the fluids spread out over the plates. need well-sealed gaskets to prevent the fluids from escaping
Regenerative heat exchanger more commonly known as regenerator
Regenerative heat exchanger the flow through the heat exchanger is cyclical and periodically changes direction. a regenerator mixes the two fluid flows. The temperature profile remains at a nearly constant temperature, and this includes the fluid entering and exiting each end.
Adiabatic wheel heat exchanger
uses an intermediate fluid or solid store to hold heat, which is then moved to the other side of the heat exchanger to be released. it is acceptable for a small amount of mixing to occur between the two streams
Plate Fin heat exchanger
This type of heat exchanger uses "sandwiched" passages containing fins to increase the effectivity of the unit. The designs include crossflow and counterflow coupled with various fin configurations such as straight fins, offset fins and wavy fins.
Fluid heat exchangers
This is a heat exchanger with a gas passing upwards through a shower of fluid, and the fluid is then taken elsewhere before being cooled. This is commonly used for cooling gases whilst also removing certain impurities, thus solving two problems at once.
Waste Heat Recovery Units
recovers heat from a hot gas stream while transferring it to a working medium, typically water or oils. The hot gas stream can be the exhaust gas from a gas turbine or a diesel engine or a waste gas from industry or refinery.
Dynamic scraped surface heat exchanger can be used either to heat a liquid to evaporate (or boil) it or used as condensers to cool a vapor and condense it to a liquid
Dynamic scraped surface heat exchanger
Direct Contact Heat Exchangers
Direct contact heat exchangers involve heat transfer between hot and cold streams of two phases in the absence of a separating wall. can be classified as: –Gas – liquid –Immiscible liquid –liquid –Solid-liquid or solid- gas
References ^ Sadik Kakaç and Hongtan Liu (2002). Heat Exchangers: Selection, Rating and Thermal Design (2nd Edition ed.). CRC Press. ISBN ^ISBN ^ Saunders, E. A. (1988). Heat Exchanges: Selection, Design and Construction. New York: Longman Scientific and Technical.^ ^ Kister, Henry Z. (1992). Distillation Design (1st Edition ed.). McGraw-Hill. ISBN ^Distillation DesignISBN ^ Perry, Robert H. and Green, Don W. (1984). Perry's Chemical Engineers' Handbook (6th Edition ed.). McGraw-Hill. ISBN ^Perry's Chemical Engineers' HandbookISBN ^ Air Pollution Control Orientation Course from website of the Air Pollution Training Institute^Air Pollution Control Orientation Course ^ Energy savings in steam systems Figure 3a, Layout of surface condenser (scroll to page 11 of 34 PDF pages)^Energy savings in steam systems ^ Patent 2,046,968 John C Raisley^Patent 2,046,968 John C Raisley ^ Sentry Equipment Corp Spiral tube Heat Exchangers^Sentry Equipment Corp Spiral tube Heat Exchangers ^ a b Alfa Laval Spiral Heat Exchangers a bAlfa Laval Spiral Heat Exchangers ^ Cooling Text^Cooling Text ^ E.A.D.Saunders (1988). Heat Exchangers:Selection Design And Construction Longman Scientific and Technical ISBN ^ISBN