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in creator/contributor: "Bliem, C.J."

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Geothermal heat cycle research supercritical cycle with counterflow condenser in different orientations

The Heat Cycle Research Program, which is conducted for the Department of Energy, has as its objective the development of the technology for effecting the improved utilization of moderate temperature geothermal resources. The current testing involves the investigation of binary power cycle performance utilizing mixtures of non-adjacent hydrocarbons as the working fluids, with supercritical vaporization and in-tube condensation of the working fluid. The utilization of these concepts verified her… more

Date: January 1, 1988

Creator: Bliem, C.J. & Mines, G.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Overview of recent supercritical binary geothermal cycle experiments from the Heat Cycle Research Program

The Heat Cycle Research Program, which is being conducted for the Department of Energy, has as its objective the development of the technology for effecting improved utilization of moderate temperature geothermal resources. Testing at the Heat Cycle Research Facility located at the DOE Geothermal Test Facility East Mesa, California involves supercritical vaporization and counterflow in-tube condensing in an organic Rankine cycle. Results of the experiments are given for both pure and mixed-hydr… more

Date: January 1, 1986

Creator: Demuth, O.J.; Bliem, C.J.; Mines, G.L. & Swank, W.D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Preliminary performance estimates of binary geothermal cycles using mixed-halocarbon working fluids

The performance of Rankine cycle binary systems for power generation using a hydrothermal resource has been investigated as a part of the DOE/GTD Heat Cycle Research Program. To date mixtures of paraffin-type hydrocarbons and water-ammonia mixtures have been investigated. This report gives the first results of the consideration of mixtures of halocarbons as working fluids in these power cycles. The performance of mixtures of Refrigerant-114 (R-114) and Refrigerant-22 (R-22) in combinations from… more

Date: July 1, 1986

Creator: Bliem, C.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Preliminary performance estimates and value analyses for binary geothermal power plants using ammonia-water mixtures as working fluids

The use of ammonia-water mixtures as working fluids in binary geothermal power generation systems is investigated. The available thermodynamic data is discussed and the methods of extrapolating this data to give the quantities needed to perform analyses of the system is given. Results indicated that for a system without a recuperator and with a working fluid which is 50 percent by mass of each constituent, the geofluid effectiveness (watt-hr/lbm geofluid) is 84 percent of that for the 50MW Hebe… more

Date: December 1, 1983

Creator: Bliem, C.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Quick look report on the startup tests for the Raft River 5-MW(e) pilot geothermal power plant

A preliminary analysis was made of the initial startup data taken between October 20 and November 2, 1981 for the 5 MW(e) Pilot Geothermal Power Plant located at the Raft River Site in southeast Idaho. This plant utilizes a dual-boiling isobutane binary cycle. Two test conditions were selected for analysis: (1) a thermal loop test with 94% of the design geofluid flow, and (2) a test at about three-fourths of the design geofluid flow in which one megawatt was generated from working-fluid flow th… more

Date: December 1, 1981

Creator: Bliem, C.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Vaporization at supercritical pressures and counterflow condensing of pure and mixed-hydrocarbon working fluids for geothermal power plants

The Heat Cycle Research Program has as its objective the development of the technology for effecting improved utilization of moderate temperature geothermal resources. Current testing involves supercritical vaporization and counterflow in-tube condensing in an organic Rankine cycle. Results of the experiments are given for both pure and mixed-hydrocarbon working fluids. The heater and condenser behavior predicted by the Heat Transfer Research, Inc. computer codes used for correlation of the dat… more

Date: January 1, 1986

Creator: Bliem, C.J.; Demuth, O.J.; Mines, G.L. & Swank, W.D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Aspects of the Kalina technology applied to geothermal power production

This report contains the results of studies conducted at the Idaho National Engineering Laboratory (INEL) concerning the applicability of the Kalina technology to geothermal (hydrothermal) power production. This report represents a correction and addition to that report. The Heat Cycle Research Program (HCRP) has as its primary goal the cost-effective production of electric power from moderate temperature hydrothermal resources. Recent work has included the study of supercritical cycles with co… more

Date: September 21, 1989

Creator: Bliem, C.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Overview of recent activities in the Heat Cycle Research Program

The Heat Cycle Research Program, which is being conducted for the Department of Energy, has as its objective the development of the technology for effecting the improved utilization of moderate temperature geothermal resources. To meet this objective, the program has as one of its goals to improve the performance of geothermal binary cycles to levels approaching the practicable thermodynamic maximum. In pursuit of this goal, tests are being conducted at the Heat Cycle Research Facility located … more

Date: January 1, 1987

Creator: Bliem, C.J. & Mines, G.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Advanced binary geothermal power plants working fluid property determination and heat exchanger design

The performance of binary geothermal power plants can be improved through the proper choice of a working fluid, and optimization of component designs and operating conditions. This paper reviews the investigations at the Idaho National Engineering Laboratory (INEL) which are examining binary cycle performance improvements for moderate temperature (350 to 400 F) resources with emphasis on how the improvements may be integrated into design of binary cycles. These investigations are examining perf… more

Date: January 1, 1989

Creator: Bliem, C.J. & Mines, G.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Advanced binary geothermal power plants: Limits of performance

The Heat Cycle Research Program is investigating potential improvements to power cycles utilizing moderate temperature geothermal resources to produce electrical power. Investigations have specifically examined Rankine cycle binary power systems. Binary Rankine cycles are more efficient than the flash steam cycles at moderate resource temperature, achieving a higher net brine effectiveness. At resource conditions similar to those at the Heber binary plant, it has been shown that mixtures of sat… more

Date: January 1, 1991

Creator: Bliem, C.J. & Mines, G.L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Overview of the Heat Cycle Research project

The Heat Cycle Research project is developing the technology base that will permit a much greater utilization of the moderate- temperature, liquid-dominated geothermal resources, particularly for the generation of electrical power. The emphasis in the project has been the improvement of the performance of binary power cycles. The investigations have been examining concepts projected to improve the brine utilization by 20% relative to a Heber-type'' binary plant; these investigations are nearing… more

Date: January 1, 1991

Creator: Bliem, C.J. & Mines, G.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Relative performance of supercritical binary geothermal power cycles with in-tube condensors in different orientations

The Heat Cycle Research Program, which is conducted for the Department of Energy, has as its objective the development of the technology for effecting the improved utilization of moderate temperature geothermal resources. The current testing involves the investigation of the performance of binary power cycles utilizing mixtures of non-adjacent hydrocarbons as the working fluids, with supercritical vaporization and in-tube condensation. The utilization of these concepts will improve the net geof… more

Date: January 1, 1989

Creator: Bliem, C.J. & Mines, G.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Zeotropic mixtures of halocarbons as working fluids in binary geothermal power generation cycles

The performance of Rankine cycle binary systems for geothermal power generation using a hydrothermal resource has been investigated. To date, in addition to many pure fluids, mixtures of Paraffin-type hydrocarbons and water-ammonia mixtures have been investigated. This paper gives the results of consideration of mixtures of halocarbons as working fluids in these power cycles. The performance of mixtures of Refrigerant-114 (R-114) and Refrigerant-22 (R-22) in combinations from pure R-114 to pure… more

Date: January 1, 1987

Creator: Bliem, C.J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Performance and operability study of the Raft River 5 MW(e) pilot geothermal power plant steady-state behavior

Estimates of the steady-state performance of the Raft River 5 MW(e) Pilot Geothermal Power Plant have been made using an existing digital computer simulation which has been updated to reflect the individual performance of the actual components in the plant. The plant output (gross and net) has been obtained as a function of geothermal fluid inlet temperature and flow rate and isobutane preheater bypass (boiler inlet subcooling). The plant performance has been determined for two ambient conditio… more

Date: November 13, 1979

Creator: Bliem, C.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Supercritical binary geothermal cycle experiments with mixed-hydrocarbon working fluids and a vertical, in-tube, counterflow condenser

The objective is improved utilization of moderate temperature geothermal resources. Current testing involves supercritical vaporization and counterflow in-tube condensing in an organic Rankine cycle. This report presents a description of the test facility and results from a part of the program in which the condenser was oriented in a vertical attitude. Results of the experiments for the supercritical heaters and the countercurrent, vertical, in-tube condenser are given for both pure and mixed-h… more

Date: December 1, 1985

Creator: Demuth, O.J.; Bliem, C.J.; Mines, G.L. & Swank, W.D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Geothermal heat cycle research: Supercritical cycle with horizontal counterflow condenser

Date: January 1, 1987

Creator: Mines, G.L.; Swank, W.D. & Bliem, C.J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Raft River binary-cycle geothermal pilot power plant final report

The design and performance of a 5-MW(e) binary-cycle pilot power plant that used a moderate-temperature hydrothermal resource, with isobutane as a working fluid, are examined. Operating problems experienced and solutions found are discussed and recommendations are made for improvements to future power plant designs. The plant and individual systems are analyzed for design specification versus actual performance figures.

Date: April 1, 1983

Creator: Bliem, C.J. & Walrath, L.F.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Simple strategies for minimization of cooling water usage in binary power plants

The geothermal resources which could be used for the production of electrical power in the United States are located for the most part in the semi-arid western regions of the country. The availability of ground or surface water in the quantity or quality desired for a conventional wet'' heat rejections system represents a barrier to the development of these resources with the binary cycle technology. This paper investigates some simple strategies to minimize the cooling water usage of binary po… more

Date: January 1, 1989

Creator: Bliem, C.J. & Mines, G.L. (EG and G Idaho, Inc., Idaho Falls, ID (USA))

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

The Kalina cycle and similar cycles for geothermal power production

This report contains a brief discussion of the mechanics of the Kalina cycle and ideas to extend the concept to other somewhat different cycles. A modified cycle which has a potential heat rejection advantage but little or no performance improvement is discussed. Then, the results of the application of the Kalina cycle and the modified cycle to a geothermal application (360/degree/F resource) are discussed. The results are compared with published results for the Kalina cycle with high temperatu… more

Date: September 1, 1988

Creator: Bliem, C.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Initial results for supercritical cycle experiments using pure and mixed-hydrocarbon working fluids

The Heat Cycle Research Program, which is being conducted for the Department of Energy, has as its objective the development of the technology for effecting improved utilization of moderate temperature geothermal resources. Testing at the Heat Cycle Research Facility (HCRF) located at the DOE Geothermal Test Facility (GTF), East Mesa, California, is presently being conducted to meet this objective. Current testing involves a supercritical vaporization and countercurrent in-tube condensing syste… more

Date: January 1, 1984

Creator: Bliem, C.J. & Mines, G.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Second law analysis of advanced power generation systems using variable temperature heat sources

Many systems produce power using variable temperature (sensible) heat sources. The Heat Cycle Research Program is currently investigating the potential improvements to such power cycles utilizing moderate temperature geothermal resources to produce electrical power. It has been shown that mixtures of saturated hydrocarbons (alkanes) or halogenated hydrocarbons operating with a supercritical Rankine cycle gave improved performance over boiling Rankine cycles with the pure working fluids for typi… more

Date: January 1, 1990

Creator: Bliem, C.J. & Mines, G.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Heat Cycle Research Experimental Program, FY-1985

The Heat Cycle Research Program, which is being conducted for the Department of Energy, has as its objective the development of the technology for effecting improved utilization of moderate temperature geothermal resources. Testing at the Heat cycle Research Facility located at the DOE Geothermal Test Facility, East Mesa, California is presently being conducted to meet this objective. Current testing involves a supercritical vaporization and counterflow in-tube condensing system. The paper pres… more

Date: January 1, 1985

Creator: Bliem, C.J.; Demuth, O.J.; Mines, G.L. & Whitbeck, J.F.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Supercritical binary geothermal cycle experiments with mixed-hydrocarbon working fluids and a near-horizontal in-tube condenser

The Heat Cycle Research Program, which is being conducted for the Department of Energy, has as its objective the development of the technology for effecting improved utilization of moderate temperature geothermal resources. Testing at the Heat Cycle Research Facility which was located at the DOE Geothermal Test Facility, East Mesa, California is presently being conducted to meet this objective. The testing effort discussed in this interim report involves a supercritical vaporization and counter… more

Date: December 1, 1989

Creator: Bliem, C.J. & Mines, G.L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Advanced binary geothermal power plants: Limits of performance

The Heat Cycle Research Program is currently investigating the potential improvements to power cycles utilizing moderate temperature geothermal resources to produce electrical power. Investigations have specifically examined Rankine cycle binary power systems. Binary Rankine cycles are more efficient than the flash steam cycles at moderate resource temperatures, achieving a higher net brine effectiveness. At resource conditions similar to those at the Heber binary plant, it has been shown that … more

Date: January 1, 1990

Creator: Bliem, C.J. & Mines, G.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department