By T.R. Bott

ISBN-10: 0080531903

ISBN-13: 9780080531908

ISBN-10: 0444821864

ISBN-13: 9780444821867

This specific and accomplished textual content considers all elements of warmth exchanger fouling from the elemental technology of ways surfaces develop into fouled to very sensible methods of mitigating the matter and from mathematical modelling of alternative fouling mechanisms to functional tools of warmth exchanger cleansing. the issues that limit the effective operation of apparatus are defined and the prices, a few of them hidden bills, which are linked to the fouling of warmth exchangers are mentioned. a few uncomplicated innovations and versions of the fouling techniques are offered as a part of the advent to the subject.Advice at the choice, layout, set up and commissioning of warmth exchangers to minimise fouling is given. a wide a part of the textual content is dedicated to using chemical and different ingredients to lessen or put off the matter of fouling. one other huge part is designed to offer info on either online and off-line cleansing of warmth exchangers. one of many problems confronted by means of designers and operators of warmth exchangers is looking ahead to the most likely quantity of fouling difficulties to be encountered with assorted circulation streams. one other huge part addresses the query and describes tools which were utilized in trying to outline fouling power. The ebook concludes with a bankruptcy on how fouling details might be received utilizing plant information, box exams and laboratory experiences.

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Additional info for Fouling of Heat Exchangers (Chemical Engineering Monographs 026)

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Editions Europ6ennes Thermique et Industrie, Paris. L. M. M. eds. Fouling in Heat Exchange Equipment. HTD, Vol. 17, ASME. A. et al, 1985, Fouling of Heat Exchangers, Characteristics, Costs, Prevention, Control, Removal. Noyes Publications, New Jersey. H. C. G. eds. Fouling of Heat Transfer Equipment. Hemisphere Publishing Corp. Washington. , 1979, The cost of fouling in heat exchanger plant, in: Fouling Science or Art? Inst. Corrosion Science and Technology and Inst. Chem. Engineers, Guildford.

2 A SIMPLE GENERAL MODEL The simplest model is that of Curve A in Fig. 1 but ignoring the induction period and would have the form dr xI =-~-. 7) where xI is the thickness of deposit at time t. 8) The difficulty of course in using this model is that without experimental work is unknown and the use of xI to determine the fouling resistance to heat transfer is also a problem since the thermal conductivity of the foulant is not usually known (see Chapter 2). 10) where x~ is the thickness and time t Even in this form the model is difficult to use unless dR/dt is known from experimental determinations the conditions of which can also be applied to the fouling problem in hand.

51,377. C. G. eds. Fouling of Heat Transfer Equipment. Hemisphere Publishing Corp. Washington. W. , 1972, Predictive methods for fouling behaviour. Chem. Eng. Prog. 68, No. 7, 69 78. 1 INTRODUCTION Heat exchangers are designed to handle fluids, either gases or liquids. It is to be expected therefore, that the flow of the fluids through the exchanger will influence to a lesser or greater degree, the laying down of deposits on the surfaces of heat exchangers. In particular the behaviour of fluids in respect of the transport of material, whether it be particles, ions, microbes or other contaminating component, will affect the extent and the rate of deposit accumulation.

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Fouling of Heat Exchangers (Chemical Engineering Monographs 026) by T.R. Bott


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