File Name: handbook of heat exchanger fouling mitigation and cleaning technologies .zip
Handbook of Thermal Science and Engineering pp Cite as. Fouling results in a significant cost to the process and power industry, and a better understanding of the fouling behavior and mitigating measures is of interest to both personnel in operating facilities and research organizations. Fouling reduces the heat transfer rate and increases the pressure drop of heat exchangers. Fouling mechanisms are broadly classified as sedimentation, chemical reaction, crystallization, and biological.
The last six terms have a more narrow meaning than fouling within the scope of the fouling science and technology, and they also have meanings outside of this scope; therefore, they should be used with caution. Keywords: heat exchanger, fouling, fouling mitigation, green technology, cleaning of heat exchangers 1. Only the pulse echo technique yielded promising results.
The loss of heat duty is extreme if local heat transfer coefficients are high at clean conditions. This leads to additional heat transfer resistance and constriction of fluid flow area. Defines the most critical variables and events that cause fouling Explains the consequences of fouling and its impact on operations, safety, and economics Provides the technical models available to better predict and eliminate the potential for fouling in any crude system.
Each invited contributor was asked to make an overall presentation covering his or her area of expertise. Create free account to access unlimited books, fast download and ads free! Another large section is designed to give information on both on-line and off-line cleaning of heat exchangers.
However, maintaining cooling effectiveness is paramount in most applications. Save my name, email, and website in this browser for the next time I comment. Bott This unique and comprehensive text considers all aspects of heat exchanger fouling from the basic science of how surfaces become fouled to very practical ways of mitigating the problem and from mathematical modelling of different fouling mechanisms to practical methods of heat exchanger cleaning.
In addition, topics such as adhesion and surface phenomena have not been properly taken into account up till now in the assessment of the fouling processes. The problems that restrict the efficient operation of equipment are described and the costs, some of them hidden costs, that are associated with the fouling of heat exchangers are discussed. Click Get Books and find your favorite books in the online library. Fouling, not only for preheat exchangers of crude distillation units, but also for other units, is one of the most serious operating problem and source for energy loss in oil refineries.
Fouling of heat exchangers. Fouling allowance: Provisions are during the design stage once fouling is anticipated. Figure 1. Heat exchangers are process equipment in which heat is continuously or semi-continuously transferred from a hot to a cold fluid directly or indirectly through a heat transfer surface that separates the two fluids. Scientific Essay from the year in the subject Physics - Thermodynamics, , language: English, abstract: This work is concerned with the effects of fouling on different fin tubes and exchangers cooled by air.
During fouling, the surface of a heat exchanger wall develops another layer of solid material. The fouling of heat exchangers, reactors and catalysts remains one of the most urgent problems facing the process industries.
Generally, the process medium flows on the tube internal side with air as coolant on the external fin side. For convenience, particularly in heat exchanger technology, the mechanisms involved have been subdivided into different subject areas. One of the difficulties faced by designers and operators of heat exchangers is anticipating the likely extent of fouling problems to be encountered with different flow streams.
This handbook presents the most important technologies concerning the reduction of fouling in heat exchangers and the appropriate technologies of removal and cleaning.
Fouling rate is a dominating factor in designing a particular heat exchanger. Heat exchangers are classified according to flow arrangement and type of construction.
It has extensive domestic and industrial applications. Different approaches are used to provide an allowance for fouling resistance. Written by experts from Germany, UK and the USA, this book is a reliable adviser for engineers, managers, technicians and students who want to have an overview concerning this field.
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The last six terms have a more narrow meaning than fouling within the scope of the fouling science and technology, and they also have meanings outside of this scope; therefore, they should be used with caution. Keywords: heat exchanger, fouling, fouling mitigation, green technology, cleaning of heat exchangers 1. Only the pulse echo technique yielded promising results. The loss of heat duty is extreme if local heat transfer coefficients are high at clean conditions. This leads to additional heat transfer resistance and constriction of fluid flow area. Defines the most critical variables and events that cause fouling Explains the consequences of fouling and its impact on operations, safety, and economics Provides the technical models available to better predict and eliminate the potential for fouling in any crude system. Each invited contributor was asked to make an overall presentation covering his or her area of expertise.
A heat exchanger is a system used to transfer heat between two or more fluids. Heat exchangers are used in both cooling and heating processes. The classic example of a heat exchanger is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air. Another example is the heat sink , which is a passive heat exchanger that transfers the heat generated by an electronic or a mechanical device to a fluid medium, often air or a liquid coolant.
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This handbook presents innovative knowledge concerning designs, preventive measures, maintenance services and monitoring. All authors are recruted from leading scientifical institutions, apparatus builders or leading main- tenance offeres. Content: 3. Introduction Cleaning 3.
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