4 research outputs found
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Method for evaluating the potential of geothermal energy in industrial process heat applications
A method is presented for evaluating the technical and economic potential of geothermal energy for industrial process heat applications. The core of the method is a computer program which can be operated either as a design analysis tool to match energy supplies and demands, or as an economic analysis tool if a particular design for the facility has already been selected. Two examples are given to illustrate the functioning of the model and to demonstrate that results reached by use of the model closely parallel those that have been determined by more traditional techniques. Other features of interest in the model include: (1) use of decision analysis techniques as well as classical methods to deal with questions relating optimization; (2) a tax analysis of current regulations governing percentage depletion for geothermal deposits; and (3) development of simplified correlations for the thermodynamic properties of salt solutions in water
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Thermodynamic properties of pure and saline (geothermal) water
In order to evaluate the performance of proposed processes utilizing geothermal energy, it is essential to determine the thermodynamic properties of fluid streams at various points in the system. The method described ascertains the values of these properties for either pure water or salt solution, correlating temperature, pressure, enthalpy, and entropy in the liquid, two-phase, and vapor regions. The corresponding FORTRAN computer formulation is coded in one subroutine and twenty-six function subprograms, sixteen of which represent correlations of the properties of pure water. The subroutine chooses the appropriate correlations, validates input data, and embodies a large fraction of the salt solution algorithms. Including nonexecutable comment lines, the entire formulation requires less than 910 lines of code. (MHR
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Process applications for geothermal energy resources. Final report
The principal goal of the program was to demonstrate economical and technical suitability of geothermal energy as a source of industrial process heat through a cooperative program with industrial firms. To accomplish that: a critical literature survey in the field was performed; a workshop with the paper and pulp industry representatives was organized; and four parallel methods dealing with technical and economical details of geothermal energy use as a source of industrial process heat were developed
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Economic value of geothermal resource assessment information
The potential of decision analysis for the evaluation of resource assessment expenditures is discussed. Calculations are shown for the expected value of information - both perfect and imperfect information. (MHR