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Deposition from combustion gases
Heat Recovery Systenu d ClIP Vol. 10, No. 3, p. 297, 1990
0890-4332/90 $3.00 + .00 Pergamon Press p|c
Printed in Great Britain
BOOK REVIEW A. R..lo~res (Editor). Depeel~ion from Combustion GMes, IOP Short Meetings Series No. 23, Institute of Physics, published
by IOP Publishing Ltd. (1989) 160pp. £20.00. This publication is the Proceedings of a one-day meeting of the Combustion Physics Group of the Institute of Physics at Marchwood, Southampton, on 4 October 1989 at which some of the latest findings of research into deposition or fouling of surfaces and passageways were presented. Almost invariably, build-up of deposits imposes significant limitations, both technical and economic on performance of all sorts of power plant and equipment. Examples of the adverse effects of deposits on surfaces include deterioration of the effectiveness of heat transfer surfaces, obstruction of flow passageways with attendant reduction in flow rate and increase in pressure drop and pumping power, while uncontrolled shedding of deposits can lead to erosion, or damage to plant and ancillary equipment. The overall consequences include reduction in plant availability shut-downs for cleaning, or installation of/n-situ cleaning equipment, or provision of extra surface area or pumping power to compensate for deteriorating performance. Thus, maintenance costs, capital costs and inconvenience all increase. Yet despite such penalties, deposition has been widely regarded as unglamorous and something to be lived with and consequently comparatively little research has been devoted to the study of how deposits form, how best to control their build-up, alleviate the effects and to predict fouling rates. In these days of increasingly stringent environmental regulations governing emissions of pollutants in combustion gases discharged into the atmosphere, the measures required to ensure that the regulations are met can influence the nature of deposits and in some instances give rise to new problems, remedies for which may involve treatment of fuels and lubricants and use of different construction materials. The Proceedings cover these and several other important matters and provide a welcome step forward in elucidation of deposition from combustion gases. Space does not permit comment on individual papers in the Proceedings, but the following list of titles of papers therein indicates the scope of the meeting. The role of the liquid phase in the formation of fireside deposits from low-rank coals. A deposition model for pulverised coal firing. Diagnosis and effect of ash deposition on the operation of large P.F.-fired boilers. Ash deposition in fluidized bed combustion systems. Boiler tube deposition during combustion of refuse-derived fuel. Carbon deposition in gas turbine combustors. Deposits in internal combustion engines. The deposition behaviour of the products of combustion of orimulsion with an MgO-based fuel additive on steam-cooled tubes---report of a 1000 hour trial. The contributions are authoritative, well-written and printed. It should be required reading for anyone who is starting research into fouling and anyone who designs, manufactures or operates combustion plant will find this a well worth-while addition to their technical libraries. At £20.00 a copy it is good value. J. R. HOWARD
297
0890-4332/90 $3.00 + .00 Pergamon Press p|c
Printed in Great Britain
BOOK REVIEW A. R..lo~res (Editor). Depeel~ion from Combustion GMes, IOP Short Meetings Series No. 23, Institute of Physics, published
by IOP Publishing Ltd. (1989) 160pp. £20.00. This publication is the Proceedings of a one-day meeting of the Combustion Physics Group of the Institute of Physics at Marchwood, Southampton, on 4 October 1989 at which some of the latest findings of research into deposition or fouling of surfaces and passageways were presented. Almost invariably, build-up of deposits imposes significant limitations, both technical and economic on performance of all sorts of power plant and equipment. Examples of the adverse effects of deposits on surfaces include deterioration of the effectiveness of heat transfer surfaces, obstruction of flow passageways with attendant reduction in flow rate and increase in pressure drop and pumping power, while uncontrolled shedding of deposits can lead to erosion, or damage to plant and ancillary equipment. The overall consequences include reduction in plant availability shut-downs for cleaning, or installation of/n-situ cleaning equipment, or provision of extra surface area or pumping power to compensate for deteriorating performance. Thus, maintenance costs, capital costs and inconvenience all increase. Yet despite such penalties, deposition has been widely regarded as unglamorous and something to be lived with and consequently comparatively little research has been devoted to the study of how deposits form, how best to control their build-up, alleviate the effects and to predict fouling rates. In these days of increasingly stringent environmental regulations governing emissions of pollutants in combustion gases discharged into the atmosphere, the measures required to ensure that the regulations are met can influence the nature of deposits and in some instances give rise to new problems, remedies for which may involve treatment of fuels and lubricants and use of different construction materials. The Proceedings cover these and several other important matters and provide a welcome step forward in elucidation of deposition from combustion gases. Space does not permit comment on individual papers in the Proceedings, but the following list of titles of papers therein indicates the scope of the meeting. The role of the liquid phase in the formation of fireside deposits from low-rank coals. A deposition model for pulverised coal firing. Diagnosis and effect of ash deposition on the operation of large P.F.-fired boilers. Ash deposition in fluidized bed combustion systems. Boiler tube deposition during combustion of refuse-derived fuel. Carbon deposition in gas turbine combustors. Deposits in internal combustion engines. The deposition behaviour of the products of combustion of orimulsion with an MgO-based fuel additive on steam-cooled tubes---report of a 1000 hour trial. The contributions are authoritative, well-written and printed. It should be required reading for anyone who is starting research into fouling and anyone who designs, manufactures or operates combustion plant will find this a well worth-while addition to their technical libraries. At £20.00 a copy it is good value. J. R. HOWARD
297