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06766 Modeling of waste heat recovery by looped water-in-steel heat pipes
18 Drlnum: ‘Wasting energy Is often easy to remedy’ 95106761 Raaiien, W. Gas (Nerherlan&J, Sep. 1995, 115, (9), 16-18. (In Flemish) The hei ‘Energy Performance Standard’ that is about to be ititroduced in the Netherlands can also be attained without much trouble in existing buildings. It would be possible to bring down energy consum tion in homes and public buildings by 50%. This is claimed by Henk fs.emum, technical supervisor with AKZO Nobel, who counts energy savings among his leisure activities. With a mere screwdriver he can save a lot of energy in buildings. ‘A proper tuning of central heating installations easily saves more energy than high-tech solutions’. Does the UK Govemment’a target to recycle 26% of 95106762 houaehold waate by the year 2000 represent an economic approach to recycling? A case study of plastic Singer, J. Resources, Conservation & Recycling, Aug. 1995, 14, (2), 133-15s. The UK Government has set a target for the recycling of domestic waste. There are already some regulations in effect that aim to improve the condition of the market, but the market for recycled materials still remains fragmented and inefficient. When private and social costs and benefits are taken into account, the benefits of recycling in certain sectors may not stack in its favour. The paper examines how current policies place incentives on the various players in the market for recycled plastics and it queries the effectiveness of the target for recycling of domestic waste. It also discusses the roles of incineration and landfill in this context, and suggests an alternative policy initiative. Evaluatlon of scale-formlng tendency and Its appll95106763 catlon to scale rrvrntlon for ash-water recovering and reuse system In coal- Rred power plant LI, X. Shuichuli Jishy 1995, 21, (l), 52-57. (In Chinese) In this naner the index of CaCO, urecinitation is introduced and its criteria are prdpdsed for evaluation -o
Energy conversion and recycling
95106766 Modellng of waste heat recovery by looped waterln+teel heat plper Akyurt, M. et al., Inr. J. Hear & Fluid Flow, Aug. 1995,16, (4). 263-271. Modelling and simulation of a water-in-steel heat pipe heat recovery system is undertaken in this paper. The heat recovery system consists of a looped two-phase thermosyphon that received heat from the stack of a gas turbine engine and delivers it to the generator of an NH,-H,O absorption chiller. Variations in the o erating temperature as well as evaporator geometry are investigated, anB the consequences on system effectiveness are studied. It is concluded that the model for the water-in-steel looped thermosyphon overcomes drawbacks of the water-in-copper thermosyphon, and that the steel system is simpler in design, lower in cost, and more competent in performance. 95106767 Reuse of coal mlnlng wastes In clvll englneerlng Part 2: Utlllzatlon of mlneatone Skarzynska, K. M. Waste Management, 1995, 15, (2), 83-126. The oldest method of minestone utilization is reclamation of spoil heaps by adapting them to the landscape by afforestation or agricultural management. The best method is, however, complete removal of the wastes. Hence, for many years research has been carried out to find new ways of minestone utilization to minimize disposal cost and harmful environmental effects. Earth structures offer the best possibilities of minestone utilization. Investigations conducted in recent years in Germany, the United Kingdom, France, Belgium, the Netherlands, and also in Poland have led to the use of many tonnes of wastes in the construction of road and railroad banks, river embankments, dykes and dams, tilling of land depressions and open pits, as well as for sea wharfs and land reclamation. Presents descriptions of minestone applications to hydraulic, harbour and road engineering and mine backfilling. 95106766 Thermal proceaalng of unused waste products: The Saaol perspective Slaghuis, J. H. et al., Preps. Pap.-Am. Chim. Sot., Div. Fuel Chem., 1995, 40, (l), 87-91. Describes h&w thermal coprocessing wastes with coal can be used to II;;;~: the waste to liquid and gaseous products with no additional toxic 95106769 Vltrlflcatlon. A process for treatment of realdues from the Incineration of donieatlc wastes Finet, C. Tech. Sci. Methodes; Genie V&in-Genie Rural, 1994, (4). . ,. 196-198. (In French) The oaoer describes how flv ash from a municioal waste incinerator in Fran&,‘was mixed with ironbxide and coal and he’ated with a plasma torch at 1370C to produce a vitrified material lower in heavy metals and resistant to leaching, B secondary fly ash rich in heavy rdetali, and a small amount of byproducts of incomplete combustion. Scale-up to 60,000 ton/yr capacity was discussed, using a 10 MW plasma torch and reactor, a cyclone for separating vitrified material and gas, a pneumatic injection system for fly ash, a fuel injector for coal or gas, and a dry treatment system for the flue gas produced.
Fuel and Energy Abstracts November 1996 477
Energy conversion and recycling
95106766 Modellng of waste heat recovery by looped waterln+teel heat plper Akyurt, M. et al., Inr. J. Hear & Fluid Flow, Aug. 1995,16, (4). 263-271. Modelling and simulation of a water-in-steel heat pipe heat recovery system is undertaken in this paper. The heat recovery system consists of a looped two-phase thermosyphon that received heat from the stack of a gas turbine engine and delivers it to the generator of an NH,-H,O absorption chiller. Variations in the o erating temperature as well as evaporator geometry are investigated, anB the consequences on system effectiveness are studied. It is concluded that the model for the water-in-steel looped thermosyphon overcomes drawbacks of the water-in-copper thermosyphon, and that the steel system is simpler in design, lower in cost, and more competent in performance. 95106767 Reuse of coal mlnlng wastes In clvll englneerlng Part 2: Utlllzatlon of mlneatone Skarzynska, K. M. Waste Management, 1995, 15, (2), 83-126. The oldest method of minestone utilization is reclamation of spoil heaps by adapting them to the landscape by afforestation or agricultural management. The best method is, however, complete removal of the wastes. Hence, for many years research has been carried out to find new ways of minestone utilization to minimize disposal cost and harmful environmental effects. Earth structures offer the best possibilities of minestone utilization. Investigations conducted in recent years in Germany, the United Kingdom, France, Belgium, the Netherlands, and also in Poland have led to the use of many tonnes of wastes in the construction of road and railroad banks, river embankments, dykes and dams, tilling of land depressions and open pits, as well as for sea wharfs and land reclamation. Presents descriptions of minestone applications to hydraulic, harbour and road engineering and mine backfilling. 95106766 Thermal proceaalng of unused waste products: The Saaol perspective Slaghuis, J. H. et al., Preps. Pap.-Am. Chim. Sot., Div. Fuel Chem., 1995, 40, (l), 87-91. Describes h&w thermal coprocessing wastes with coal can be used to II;;;~: the waste to liquid and gaseous products with no additional toxic 95106769 Vltrlflcatlon. A process for treatment of realdues from the Incineration of donieatlc wastes Finet, C. Tech. Sci. Methodes; Genie V&in-Genie Rural, 1994, (4). . ,. 196-198. (In French) The oaoer describes how flv ash from a municioal waste incinerator in Fran&,‘was mixed with ironbxide and coal and he’ated with a plasma torch at 1370C to produce a vitrified material lower in heavy metals and resistant to leaching, B secondary fly ash rich in heavy rdetali, and a small amount of byproducts of incomplete combustion. Scale-up to 60,000 ton/yr capacity was discussed, using a 10 MW plasma torch and reactor, a cyclone for separating vitrified material and gas, a pneumatic injection system for fly ash, a fuel injector for coal or gas, and a dry treatment system for the flue gas produced.
Fuel and Energy Abstracts November 1996 477