The Experts below are selected from a list of 54474 Experts worldwide ranked by ideXlab platform
Mehmet Kanoglu - One of the best experts on this subject based on the ideXlab platform.
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performance and parametric investigation of a binary geothermal power Plant by exergy
Renewable Energy, 2008Co-Authors: Mehmet Kanoglu, Ali BolatturkAbstract:Exergy analysis of a binary geothermal power Plant is performed using Actual Plant data to assess the Plant performance and pinpoint sites of primary exergy destruction. Exergy destruction throughout the Plant is quantified and illustrated using an exergy diagram, and compared to the energy diagram. The sites with greater exergy destructions include brine reinjection, heat exchanger and condenser losses. Exergetic efficiencies of major Plant components are determined in an attempt to assess their individual performances. The energy and exergy efficiencies of the Plant are 4.5% and 21.7%, respectively, based on the energy and exergy of geothermal water at the heat exchanger inlet. The energy and exergy efficiencies are 10.2% and 33.5%, respectively, based on the heat input and exergy input to the binary Rankine cycle. The effects of turbine inlet pressure and temperature and the condenser pressure on the exergy and energy efficiencies, the net power output and the brine reinjection temperature are investigated and the trends are explained.
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exergy analysis of a dual level binary geothermal power Plant
Geothermics, 2002Co-Authors: Mehmet KanogluAbstract:Exergy analysis of a 12.4 MW existing binary geothermal power Plant is performed using Actual Plant data to assess the Plant performance and pinpoint sites of primary exergy destruction. Exergy destruction throughout the Plant is quantified and illustrated using an exergy flow diagram, and compared to the energy flow diagram. The causes of exergy destruction in the Plant include the exergy of the working fluid lost in the condenser, the exergy of the brine reinjected, the turbine-pump losses, and the preheater–vaporizer losses. The exergy destruction at these sites accounts for 22.6, 14.8, 13.9, and 13.0% of the total exergy input to the Plant, respectively. Exergetic efficiencies of major Plant components are determined in an attempt to assess their individual performances. The exergetic efficiency of the Plant is determined to be 29.1% based on the exergy of the geothermal fluid at the vaporizer inlet, and 34.2% based on the exergy drop of the brine across the vaporizer–preheater system (i.e. exergy input to the Rankine cycle). For comparison, the corresponding thermal efficiencies for the Plant are calculated to be 5.8 and 8.9%, respectively.
Yunus Cerci - One of the best experts on this subject based on the ideXlab platform.
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exergy analysis of a combined ro nf and edr desalination Plant
Desalination, 2005Co-Authors: Nafiz Kahraman, Yunus A Cengel, Byard D. Wood, Yunus CerciAbstract:A brackish water desalination Plant in California that incorporates RO, NF, and EDR units was analyzed thermodynamically using Actual Plant operation data. Exergy flow rates were evaluated throughout the Plant, and the exergy flow diagrams were prepared. The rates of exergy destruction and their percentage are indicated on the diagram so that the locations of highest exergy destruction can easily be identified. The analysis shows that most exergy destruction occurs in the pump/motor and the separation units. The fraction of exergy destruction in the pump/motor units is 39.7% for the RO unit, 23.6% for the NF unit, and 54.1% for the EDR unit. Therefore, using high-efficiency pumps and motors equipped with VFD drives can reduce the cost of desalination significantly. The Plant was determined to have a Second Law efficiency of 8.0% for the RO unit, 9.7% for the NF unit, and 6.3% for the EDR unit, which are very low. This indicates that there are major opportunities in the Plant to improve thermodynamic performance by reducing exergy destruction and thus the amount of electrical energy supplied, making the operation of the Plant more cost effective.
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performance evaluation of a single flash geothermal power Plant in denizli turkey
Energy, 2003Co-Authors: Yunus CerciAbstract:The performance of an 11.4 MW single-flash geothermal power Plant in Denizli, Turkey, along with major Plant components, was evaluated by using exergy analysis based on Actual Plant operation data. The geothermal power Plant operation is described by following the flow of the geofluid, and the exergies of the geofluid at major Plant locations are calculated and presented in tables. Exergy destruction from the wellhead to the discharge of steam is quantified and illustrated using an exergy flow diagram. Major exergy destructions occurred due to the separation of steam from the geofluid, the discharge of the brine from the separator, turbine, generator and compressor inefficiencies, and the discharge of steam to the environment. The largest exergy destruction occurred during the discharge of the brine into the Menderes river. This amounted to 46.9% of the total energy input. The second law efficiency of the Plant was calculated to be 20.8%. The comparison of the efficiency with other geothermal power Plants revealed that the Plant efficiency is low, and therefore alternative designs were investigated to improve its performance.
P B Deshpandey - One of the best experts on this subject based on the ideXlab platform.
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modelling and simulation of a multistage flash msf desalination Plant
Desalination, 1994Co-Authors: Asghar Husain, A. Woldai, Adel Airadif, A Kesou, H Sultan, R. Borsani, P B DeshpandeyAbstract:Abstract The paper describes the work done on modelling and simulation of a multistage flash desalination Plant containing 15 recovery and 3 rejection stages. Both the steady-state and dynamic simulations have been carried out through the use of SPEEDUP package. In addition, a specifically written FORTRAN program is used for the steady-state simulation based on tridiagonal matrix formulation. Good agreement is achieved by comparing with the vendor supplied as well as Actual Plant data.
Ali Bolatturk - One of the best experts on this subject based on the ideXlab platform.
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performance and parametric investigation of a binary geothermal power Plant by exergy
Renewable Energy, 2008Co-Authors: Mehmet Kanoglu, Ali BolatturkAbstract:Exergy analysis of a binary geothermal power Plant is performed using Actual Plant data to assess the Plant performance and pinpoint sites of primary exergy destruction. Exergy destruction throughout the Plant is quantified and illustrated using an exergy diagram, and compared to the energy diagram. The sites with greater exergy destructions include brine reinjection, heat exchanger and condenser losses. Exergetic efficiencies of major Plant components are determined in an attempt to assess their individual performances. The energy and exergy efficiencies of the Plant are 4.5% and 21.7%, respectively, based on the energy and exergy of geothermal water at the heat exchanger inlet. The energy and exergy efficiencies are 10.2% and 33.5%, respectively, based on the heat input and exergy input to the binary Rankine cycle. The effects of turbine inlet pressure and temperature and the condenser pressure on the exergy and energy efficiencies, the net power output and the brine reinjection temperature are investigated and the trends are explained.
Ibrahim Dincer - One of the best experts on this subject based on the ideXlab platform.
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Exergetic performance analysis of Dora II geothermal power Plant in Turkey
Energy, 2012Co-Authors: Hadi Ganjehsarabi, Atilla Gungor, Ibrahim DincerAbstract:An exergy analysis of the Dora II geothermal power Plant (DGPP) with 9.5 MW net power output is carried out by using Actual Plant data to evaluate Plant performance and pinpoint the locations of exergy destructions/losses. It aims to determine exergy efficiencies, and exergy destructions in each component of the Plant. Exergy destructions in each of the components of the whole Plant are determined and illustrated based on the Actual data. The exergy destructions/losses take place through losses in the vaporizer, preheater, turbines, pumps and cooling tower, and the re-injection of the geothermal fluid. The exergy destruction ratios for these units and processes accounts for 7.97%, 1.25%, 11.93%, 1.3%, 14.92% and 32.18% of the total exergy input to the Plant, respectively. Among the observed components in the Plant, the most efficient equipment is found to be the preheater with an exergy efficiency value of 98%. The overall energetic and exergetic efficiencies of the Plant are calculated to be 10.7% and 29.6%, respectively. The results show that geothermal energy can make a significant contribution toward reducing the emissions of greenhouse gases. © 2012.
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Performance evaluations of a geothermal power Plant
Applied Thermal Engineering, 2011Co-Authors: C. Coskun, Zuhal Oktay, Ibrahim DincerAbstract:Abstract Thermodynamic analysis of an operational 7.5 MWe binary geothermal power Plant in Tuzla-Turkey is performed, through energy and exergy, using Actual Plant data to assess its energetic and exergetic performances. Eight performance-related parameters, namely total exergy destruction ratio, component exergy destruction ratio, dimensionless exergy destruction, energetic renewability ratio, exergetic renewability ratio, energetic reinjection ratio, exergetic reinjection ratio and improvement potential are investigated. Energy and exergy losses/destructions for the Plant and its units are determined and illustrated using energy and exergy flow diagrams. The largest energy and exergy losses occur in brine reinjection unit. The variation of the Plant energy efficiency is found between 6% and 12%. Exergy efficiency values change between 35 and 49%. The annual average energy and exergy efficiencies are found as 9.47% and 45.2%, respectively.
