The main purpose of this paper is to analyze the sensitivity of system parameters to the performance of the Organic Rankine Cycle (ORC) system quantitatively. A thermodynamic model of the ORC system for binary-cycle geothermal power plants has been developed and verified. The system parameters, such as working fluid, superheat temperature, pinch temperature difference in evaporator and condense...

As part of the initial assessment of the geothermal power potential of Indonesia an electronic model, (IGSEP), Mahon, (1987), was developed to prioritise the most favourable resources and determine the least cost development scenarios for generating geothermal electricity. The model was tested and assessed using data from 100 different geothermal prospects in the country. This involved research...

This study deals with the life cycle assessment (LCA) and an exergo-environmental analysis (EEvA) of geothermal Power Plant Hellisheiði (Iceland), a combined heat power double flash plant, installed 303.3 MW for electricity 133 hot water. LCA approach is used to evaluate analyse environmental performance at plant global level. A more in-depth developed, components level, through EEvA. The emplo...

Since producing our first steam turbine in 1959, Fuji Electric has manufactured more than 464 steam turbines having a total combined output capacity that exceeds 23,619 MW, and has delivered these turbines to various countries throughout the world. In the industrial sector, Fuji Electric shipped Japan's first supercritical, pure transformation plant in 1973, achieving higher operating efficienc...

A series of various readily water soluble esters were synthesized by a very efficient procedure. These compounds can be useful as thermosensitive tracers for studying the cooling progress in a low enthalpy georeservoir exploitable by double flash geothermal power plant systems. The kinetics of their hydrolysis was investigated. Acylation of primary alcohols or phenols was carried out by a metho...

The widely renowned M.I.T. study “The Future of Geothermal Energy” (2006) determined recoverable EGS resources > 200,000 EJ alone for the USA, corresponding to 2,000 times the annual primary energy demand. To universally and globally utilize these immense resources exciting R&D problems need to be tackled: 1) Development of a technology to produce electricity and/or heat from a basically ubiqui...

A computer program, GeoSteamNet, for the numerical simulation of steam transport in geothermal pipeline networks is written in Visual Studio .NET. The program considers (a) internally consistent thermodynamic properties of water, and (b) a numerical algorithm based on the principles of conservation of mass, linear momentum (Newton’s second law), and energy (the first and second laws of thermody...

Perfect compatibility between geothermal plants and the development of the other resources of the territory (tourism, quality agriculture, etc.) is a key issue for the sustainability of the geothermal energy and its acceptance by the communities hosting the plants. Third Millennium geothermal projects are able to win this challenge. Integration in the landscape of power plants and related infra...

In this study, the chemical composition of the essential oils (EOs) extracted from aerial parts of native populations of Origanum vulgare ssp. vulgare from Iran was compared by GC and GC/MS. Plants were collected at bloom stage from their natural habitats located in Kaleybar, Sabalan, Meshkin Shahr and Chalus regions, respectively from East Azerbaijan, Ardabil, Ardabil and Mazandaran provinces....

The present study was carried out to assess and document ethnobotanical knowledge of the plants of Sabalan district in Ardabil Province, as the area has diverse flora and high ethnobotanical potential. Medicinal plants of Sabalan were studied through collections of plant specimens and by interviewing local informants from several villages. For Each plant species the scientific and vernacular na...