摘要:

Coal samples from different Indian Permian (Gond-wana) basins were systematically examined by organic geochemical and petrological methods in order to ascertain the nature of the organic metamorphism and the kinds of source materials involved. The n-alkane distribution, the carbon preference index, the percentage of extracts (from 100 gms of coal), and the pristane/phytane and pristane/nC17ratios were found to be suitable parameters for geothermal changes. The maximum reflectance of vitrinite, volatile matter content (daf), and the content of bituminous macerals (bituminite, resinite, and so on) were also determined. Regression analysis showed a decreasing trend of percentage extracts and the liptinitic maceral content with increasing reflectance of vitrinite. A definite trend was also noticed when the n-alkane distribution pattern of the different coals of the world was compared with the Indian coals. Eventually all the parameters of organic geochemistry and coal petrology correlated with the introduction of several new parameters.

ISSN:0090-8312    

DOI:10.1080/00908317908908067

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

This paper reviews the status of underground pumped hydro storage (UPHS) for electric utility peaking and energy-storage applications. The salient features of major recent studies are reviewed. Turbomachinery options and advances in high-head pump/turbines are discussed. The effect of head, capacity, turbomachinery unit size and type, and other performance variables on die cost of a UPHS plant are presented. Market potential, siting criteria, lower reservoir construction, and geologically-related issues are addressed. The environmental impact of a UPHS plant is deduced from comparable facilities, and these issues and other safety concerns are presented. UPHS is an economically viable scheme for energy-storage and peaking applications in which considerable savings in premium fuels can be achieved through the replacement of combustion gas turbines. The technology for UPHS is available, but additional research and development are required for high-head turbomachinery, motor/generators, cavern geology, and system optimization.

ISSN:0090-8312    

DOI:10.1080/00908317908908068

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

Coalbed methane is the unconventional gas source that could perhaps be put into production most quickly and cheaply. In order to promote die development of this potentially large resource, government agencies can do three significant things: initiate a coring program for resource definition; cooperate in clarifying the status of the resource and in prescribing the rights of all interested parties; and establish incentive programs to speed production and use of die resource

ISSN:0090-8312    

DOI:10.1080/00908317908908069

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

ISSN:0090-8312    

DOI:10.1080/00908317908908070

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor