05068 Exergy analysis of combined-cycle integrated coal-gasification (GICC) plants

05068 Exergy analysis of combined-cycle integrated coal-gasification (GICC) plants

10 Engines (power gensrarion and propulsion, electric vehicles) Q!mQ64 DLE combustor exceeds performance guarantees Davidson, J. and Leonard, G. MPS...

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Engines (power gensrarion and propulsion, electric vehicles)

Q!mQ64 DLE combustor exceeds performance guarantees Davidson, J. and Leonard, G. MPS, Modern Power Systems, May 1995, 15, (5). 37, 39, 41. Reports that the Dry Low Emission (DLE) combustion system developed b GE Marine and Industrial Engines, Evandale, Ohio, USA, for its hi@ e&* lciency LM6000 aeroderivative gas turbine is now a commercial realty. The system ls exceeding performance arantees at its first world application, the combined-cycle cogeneration !-?* c&ty at the Ghent power station in Belgium. 95lO6Q66 Electrlclty market shapes new gas turbine strategies Touchton, G. and Cohn, A. MPS, Modern Power Syskms, May 1995,15, (S), 17, 19-20. As the structure of the power generation market changes, new strategies like distributed generation and intermediate load operation offer the means for plant operators to improve their efficiency and competitiveness. Initiatives such as the Collaborative Advanced Gas Turbine programme are aimed at developing combustion turbines suited lo these new demands. Emlsslons and power characterlstlcs of diesel 96lO6066 engines on methyl aoyate and diesel fuel blends Ali, Y. et aL, Bioresource TechnoL, 1995, 52, (2), 185-195. A Detroit 6V-92 TA coach diesel engine and a Cummins NTA-855-C diesel engine were operated on fuels produced by blending methyl soyate with No. 2 diesel fuel. Specific gravity, viscosity, and heating values of seven fuel blends were determined. Power developed by the engine, brake specific fuel consumption, and emissions analyses includin brake specific hydrocarbon, brake specific oxides of nitrogen, brake specs*f lc carbon monoxide and smoke were measured. The performance of the engine was found to be satisfactory without a significant reduction in power output on methyl soyate blends up to 30%. 96lQ6067 An envlronmental guide to small-scale combined heat and power. Beat practice programme GoodPractice Guide 115, DOE 1995, Building Research Establishment. 6 PP. The guide explains the environmental benefits and requirements of a cc&-

effective technolo

combined heat and power, which provides an altemaescribes how significant environmental improvements achieved by installing gas-engine CHP.

96lO!io66 Exer anal als of combined-cycle Integrated coalgasiflcatlon (GlCZlrplan!s IS;;Ss, F. P. et al, Ing. Quim. (Madrid), 1994, 26, (300), 53-58. (In tiiscuss& the exerpv analvsis of a GICC oower olant which indicates that the overall efficiegb of ihe plant is enh’anced by integration of the gas turbine and the air fractionation unit. Integration also contributes to abatement of NO, emissions. Air compressors with inter-stage cooling have higher exergy efficiency than heat-sink cooling. 95/05069 Feaslblllty of gas oxpanalon turbines utlllzatlon In the as lnduatry RUlXI, J. Plyn, 1994, 74, (7), 11-14. (In Czech) After a short theoretical discussion the article pursues two applications of expansion turbines in Canada (Cochrane extraction plant) and m the Czech Republic (preregulator station Velke Nemcice). 95lO5Q70 Flrat decade of large-power gas turbines in Nlgerls Hart, H. I. Applied Energy, 1995,51, (3). 213-222. This paper is an ap raisal of the performance of the four 75 MW gas turbines (GTs), i.e. t1e first large-power generatine GTs installed in Nigeria. All the major parameters considered-availability, utilization and capability factors-were much lower than acceptable. The frequency of failures of some vital components of the machines is also higher than normal. The general low performance is linked to some peculiar environmental conditions of the place and circumstances of the country, which make the design of certain parts of the GTs inadequate. 95/05071 Gas turbine blade materials: The next steps Czech, N. et aL, MPS, Modern Power Systems, May 1995. 15, (5), 43, 45-46. As the demand for larger and more efficient gas turbines continues, turbine blade materials will be subjected lo even higher loads and increased thermal stress. To meet the requirements of to&orrow’s even more efficient machines, development ls focused on new cooling techniques, radical materials concepts and improved manufacturing technolo ‘es. The article takes a brief look at some of the more salient innovations 8 at will mrne to fruition during the next decade or so. 95105072 The heat reslatant new ?? ustenltlc stainless steel NAR-AH-4 Uno, H. et aL, Sumitomo Kinwk~, 1994, 46, (5), P87-91. (In Japanese) The pa r describes the development of heat-resistant austentic stainless steel Np” AR-AH-4 and its properties. The stainless steel is developed to substitute higher- rice SUS 310s stainless steel for use as heat-resistant parts, e.g. for co a!-fIred power plants.

359

Fuel and Energy Abstracts September 1995

95iO5073 Nordjylland

Highest

supercrltlcallty

for

Skaerbaek

and

MPS, Modern Power Systems, Mar. 1995, 15. (3). 41. 43-44. Reports that double reheat ste& turbine &its.& &crate on steam conditions of 285 bar and 580°C supplied to two ELSAM CHP power plants in Denmark have been described as the highest cycle efficien steam units in the World. Under construction for the IS Skaerbaek and 7 S Nordjyllandsvaerket power plants, the first unit is scheduled to commence commercial service in 1997 and the second in 1998.

95lQ5074 An lnveatlgatlon of the factors that determlne the attractiveness of cogeneratlon Roy-A&ins,J. E. Hear Recovery Sys. CHP, Jul. 1995, 15, (5), 473-480. The author discusses the factors which determine the value of electricity generated by a cogeneration plant, and hence the attractiveness of cogeneration. 95/05075

Kuala Langat uaea 13E2s on a fasttrack to 667 MW

MPS, Modern Power Systems, May 1995, 15, (5), 27, 29, 31, 33-34.

Reports that a number of independent power producers are developing projects to help meet Malaysia’s electricity demand - a demand which is growing by more than 8% per year. One of the fmt projects to come on line as a result of this activity is a combined cycle power station built by Genting Sanyen Power at Kuala Langat. 95105076 Long-term performance of CHP systems Mine& S. T. Proc. Inst. Med. Eng., IMechE Co& 1994, (8), 25-32. Discusses how a recent analysis of the long-term performance of three industrial gas-turbine combined heat and wer systems has shown that, after the resolution of initial difficulties, p” ew problems have been experienced. Each system has achieved high levels of availability and thermal efficient and both actual and projected payback penods compare favourabTy with those currently bemg achieved by other industrial gas turbine rejects where the electricity generated replaces that from the public suppPy. Natural gas vehicles - A reallstlc alternatlvo 95lQ5077 C$ky D. C. and Fricker, N. Petroleum Review, May 1995.49, (580). -

.

The authors discuss how road vehicles are now the principal source of air pollution in urban areas in the UK Environmental concerns over road tram art are no longer restricted to the control of impacts at the use. P.t IS now reco@sed that the impacts are local, re nature. A wmparision of the impacts that different romnent must therefore recognise the scale over which they occur. 95105076

New turbines eve the lndustrlal cho market

MPS, Modern Power Sysrems, &I. 1995, 15. (a), 35, 57-38.

Reports that ABB have introduced two small R8S turbines specifically aimed at the industrial sector. The machines are &cd a1 providing industries with standardized, cost-effective turnkey chp installations. Important features of the machines are heavy duty construction and ease of maintenance. Performance of s heat-pipe based waste-heat 95lO5079 recovery and utlllaatlon system for a gas-turblne engine Akyurt, M. et aL, J. InMule of Energy, Jun. 1995, (475), 80-84. The results of a modelling and simulation study on the combined performance of a power system are presented. 95lQ5060 Perlod of reflection on CHP forces the Envlronmental Action Plan 11year result down Kaljee, R. Gas (Nelherlandr), Jul.-Aug. 1995, 119. (7). 40-41. (In Flemish) Four years of EAP (Environmental Action Plan) should reduce CO, production by 5.5 million ton by the year 2000, 1.2 million ton of which were achieved m 1994. The results of the energy generation sector (0.75 million ton) were strongly affected by the period of reflection on CHP. Aa a result the installed CHP capacity will be u 215 MW by the year 2000, whereas in 1993 990 MW was projected. -I! e achievements in the coosumption sector (0.45 million ton) tie corn arable lo previous years. In partrdar incentive schemes for insulation, 1.@-efficiency boilers and low-energy lighting were very successful. In 1994 major efforts were made in preparina the implementation of EAP II. that will boost the effecta of the mea&es invohl in the next few years. Rye House - A further step In the use of gas for 95105061 power generation &&, A. R. and Sharpe, M. Power Engineering J., Feb. 1995, 9, (l), Repok on the opening of Rye House power station near Hoddesdon in Hertfordshire, the second of PowerGen s combined-cycle plants built by Siemens. The article discusses this increasingly imporiant $ower generaiing technology and its application at Rye House.