7 1 Process heating, power and incineration (energy applications in industry)

95103976 Analysis of absorption process In a smooth-tube heat exchanger with a porous medium Kang, Y. T. et al., Heat Transfer Engng., Oct.-Dec. 1994, 15, (4), 42-55. In this article the absorption process in a smooth-tube heat exchanger (GAX absorber) with a porous medium is analyzed and a countercurrent model for GAX absorber that includes an absorption process within the porous medium is proposed.

95103977 Analysis of an underground electric heating sys- tem with short-term energy storage . Ramadan, B. H. ASHRAE Trans., 1994, 100, (2), 3-13. The paper discusses the principal commercially-active heat storage appli- cation in which concrete is used as the storage medium in the use of subfloor electric heaters.

95103976 technology

Analysis of COREX process as a new lronmaking

Zhu, K. Shanghai Jinshu, 1994, 16, (6), l-8. (In Chinese) The paper reviews the progress of COREX ironmaking process during the last 10 years.

95103979 The auxlllary fuel Injection scene Luengen, H. B. 89-109.

Comm. Eur. Communities, Report EUR.15582, 1994,

Reports that there is no need in Germany to change from the iron blast furnace route to smelting reduction. Germany has sufficient modern coke oven facilities which ensure enough coke capacity for the next 15 years if a coke plant life time of 25 years after commissioning is assumed. The objectives are to decrease coke consumption in the blast furnace.

Blowlng of oxygen together wlth coal dust Into

Rossman, M. and Dell, G. Sievarenstvi, 1994, 42, (3), 1.53-158. (In Czech) Discusses how the introduction of different kinds of coal dust that are blown into the cupolas together with enriched oxygen makes it possible to reduce the amount of coke used. In dependence on the kind of coal dust, the blown dose, the grainsize, and other specific parameters it is possible to increase the oxygen and silicon content in cast iron and at simultaneous additional blowing of oxygen to increase the melting output too.

95103981 Building servlces maintenance BSRIA, Old Bracknell Lane West, Bracknell, Berkshire RGl2 7AH, UK,

f25.00, Feb. 1995, 72 pp. The publication is a guide to the literature of building services mainte- nance. An easy to use sourcebook, it will guide the reader through authori- tative tests, general discussion papers, educational texts, standards and specifications.

95103962 Calculating the cross-sectlon, of heat exchanger chimney stacks - I Munz, M. and Munz. W. Heiz. Luft. Haustech., Feb. 1995.46, (2). 61-67. (In German) The paper sets our various calculation-intensive procedures which can be used to determine the waste gas temperature and combustion air tempera- ture required for calculating the cross-section of heat exchanger chimney stacks.

95103963 Coke passlvation Mi, K. and Li, J. Huadong Yejin Xueyuan Xukbao, 1994, 11, (4). 22-26. (In Chinese) Discusses the mechanism of coke passivation limiting the coke gasification in ironmaking blast furnaces, and its impact on the technology and eco- nomic efficiency of pig iron smelting.

95103964 Decrease in fuel ratio In blast practice with pulver- lzed coal lnlection Sato, K. and ?amaoka, H. (Assigned to) Sumitomo Metal Ind., JAP. Pat. JP.O6,207,209, Jul. 1994. Describes a process to decrease the fuel ratio in the operation of blast furnaces with pulverized coal injection, the volatile components in the coal powder are controlled at 13-20%.

95/03965 Design correlations of an air-lift tube reactor Majeed, J. G. and Bekassy-Moinar, E. Gas Separation & Purification, 1995, 9, (2), 101-109. Air-lift reactors are important gas-liquid contactors for gas separation puri- fication, fermentation and waste water treatment on account of their simple construction and low energy consumption together with high mass and heat transfer rates. Apart from the improved liquid mixing, air-lift reactors have no moving elements and the power requirement comes only from the air supply. A new air-lift tube (ALT)-type reactor was investigated in labora- tory and pilot scale. A study was conducted to measure the effects of liquid properties (such as viscosity and density) on the hydrodynamics of the ALT reactor.

95103986 Effect of gas flow on simultaneous carburization and reduction of iron ore Motlagh, M. Ironmaking Steelmaking, 1994, 21, (4), 291-302. Experimental results for direct reduction of Australian lump iron ore using a gas mixture with CO to CO, ratio of 70 and partial pressure pm of 0.1 atmosphere at various gas flowrates are reported. It was found that carbon deposition does not occur in the absence of iron or a catalyst, irrespective of the gas flow or heating rate of the gas mixture. However, in the presence of metallic iron, the rates of reduction and carbon deposition are directly related to the gas flowrate. The results are compared with those at various CO to CO ratios, up to 25%H, in the coal gas, and the industrial implica- tions of al f the findings are discussed.

95103997 The effective length of a flat plate heat pipe cov- ered partially by a strip heater on the evaporator section Sun, K. H. er al., Heat Recovery Sys. CHP, May 1995, 15, (4), 383-388. Discusses the suitability of flat plate heat pipes for cooling electronic devices owing to their superior geometric configurations. An approximate method for calculating the effective length of a flat plate heat pipe when a strip heater is partially covering the evaporator section is described.

95/03999 The effective pore radius of screen wicks Imura, H. et al., Heat Transfer Engng., Oct.-Dec. 1994, 15, (4), 24-32. The effective pore radius in screen-wick heat pipes was investigated, which is very important for the prediction of maximum heat transfer rates due to capillary hmitations. An equation for the effective pore radius of the screen wicks was derived based on the model of the screen geometry. The capil- lary height for stainless steel and phosphor bronze screens was measured using water, ethyl alcohol, and Freon 113 as the test liquids. The effect of surface treatment (acid cleaning and oxidation) on the capillary height was also examined.

95103989 production

Energy economy optlmlzation of plg iron

Peters, K. H. and Reinitzhuber, F. Schriftenr GDMB, 1994, 72, 127-141. (In German) Describes metallurgical, blast furnace design and energy-technical improvements that has allowed the decrease in energy consumption for pig iron production by l/3 compared to the level observed 30 years ago.

95103990 Energ Ing industrles In Y

utlllratlon In the clay and pottery process- N gerla

Akinbode, F. 0. Energy, Jun. 1995, 20, (6), 585-587. The authors describe the patterns of energy use in the clay process indus- tries. Suggestions are offered on energy conservation measures.

95103991 Engineering materlals 1. An lntroductlon to thelr propertles and appllcatlons Ashby, M. F. and Jones, D. R. Reed Book Services Ltd., PO Box 56, Rushden, Northants NNIO 9vX, UK, fl7.50. This book is a course for engineering students with no previous back- ground in the subject. Each chapter is designed to cover the content of one 50-minute lecture, 27 in all, and allows time for demonstration and illustra- tive slides. The text contains sets of worked case studies which apply the material of the proceeding block of lectures.

95/03992 Feature - plped services Stewart, C. et al., Bldg. Serv. Environ. Engr., Feb. 1995, 18, (6), 18-26. Five short aticles dealing with different aspects of pipes and piped services.

95103993 Flow mechanisms In gas-fired furnaces Copin, C. et al., Gaz d’aujourd’hui, Mar. 1995, 119, (3) 153-155. (In French) The determination of combustion product flow profiles in gas-fired indus- trial ovens and furnaces particularly through residence time distribution is of paramount importance for optimizing furnace design and operation. A method developed by Gaz de France and the technical University of Com- piegne, France, is described in this article.

;:;;;:94 Gas-fired high-pressure cleaner: An impeccable

Smith, P. Gas (Netherlands), Apr. 1995, 115, (4), 36-38. (In Flemish) The gas-fired high-pressure cleaner can now be supplied with a capacity of 500 to 1000 litres of warm water per hour, working pressures between 30 and 200 bar and heating capacity between 50 and 100 kW. A number of manufacturers have started to supply gas-fired high-pressure cleaners with state-of-the-art burner and control technology. Advantages: clean, no fuel storage necessary, no mess, no stench, no de-aeration. While the gas-fired high-pressure cleaner may be expensive to purchase (the price difference amounts to a few thousand guiiders), it easily pays its way in operational savings: a good three thousand guilders annually.

284 Fuel and Energy Abstracts July 1995