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This paper presents an experimental investigation of the combustion characteristics of palm methyl ester (PME), also known as palm oil-based biodiesel, in an oil burner system. The performance of conventional diesel fuel (CDF) and various percentages of diesel blended with palm oil-based biodiesel is also studied to evaluate their performance. The performance of the various fuels is evaluated based on the temperature profile of the combustor’s wall and emissions, such as nitrogen oxides (NOx) and carbon monoxide (CO). The combustion experiments were conducted using three different oil burner nozzles (1.25, 1.50 and 1.75 USgal/h) under lean (equivalence ratio (Φ) = 0.8), stoichiometric (Φ = 1) and rich fuel (Φ = 1.2) ratio conditions. The results show that the rate of emission formation decreases as the volume percent of palm biodiesel in a blend increases. PME combustion tests present a lower temperature inside the chamber compared to CDF combustion. High rates of NOx formation occur under lean mixture conditions with the presence of high nitrogen and sufficient temperature, whereas high CO occurs for rich mixtures with low oxygen presence.
Abdolsaeid Ganjehkaviri; Mohammad Nazri Mohd Jaafar; Seyed Ehsan Hosseini; Anas Basri Musthafa. Performance Evaluation of Palm Oil-Based Biodiesel Combustion in an Oil Burner. Energies 2016, 9, 97 .
AMA StyleAbdolsaeid Ganjehkaviri, Mohammad Nazri Mohd Jaafar, Seyed Ehsan Hosseini, Anas Basri Musthafa. Performance Evaluation of Palm Oil-Based Biodiesel Combustion in an Oil Burner. Energies. 2016; 9 (2):97.
Chicago/Turabian StyleAbdolsaeid Ganjehkaviri; Mohammad Nazri Mohd Jaafar; Seyed Ehsan Hosseini; Anas Basri Musthafa. 2016. "Performance Evaluation of Palm Oil-Based Biodiesel Combustion in an Oil Burner." Energies 9, no. 2: 97.
In this paper, a RSORC (regenerative solar organic rankine cycle) is optimized. For this purpose, hourly analysis is considered and evaporator pressure, condenser pressure, refrigerant mass flow rate, number of solar panel (solar collector), storage capacity and regenerator effectiveness are selected as design parameters. Then RPGA (Real Parameter Genetic Algorithm) is used to find the maximum value of a new objective function named the RAB (relative annual benefit). The optimization is separately performed for three working fluids including R123, R245fa and isobutane. The optimization results reveal that the best studied working fluid is isobutane with 258810 $/year as relative annual benefit and follow by R245fa and R123 with 68173 and 64028 $/year as the RAB. The hourly analysis shows that in the optimum situation, a plant with isobutane as a working fluid produces higher electricity in the day hours while no electricity is produced in the night hours. Furthermore, a plant with isobutane needs the higher evaporator pressure, mass flow rate and number of solar panels with the lower condenser pressure, storage tank capacity and regenerator effectiveness compared with R245fa and R123. Finally the sensitivity analysis on simulation time step is performed and results are reported
Hassan Hajabdollahi; Abdolsaeid Ganjehkaviri; Mohammad Nazri Mohd Jaafar. Thermo-economic optimization of RSORC (regenerative solar organic Rankine cycle) considering hourly analysis. Energy 2015, 87, 369 -380.
AMA StyleHassan Hajabdollahi, Abdolsaeid Ganjehkaviri, Mohammad Nazri Mohd Jaafar. Thermo-economic optimization of RSORC (regenerative solar organic Rankine cycle) considering hourly analysis. Energy. 2015; 87 ():369-380.
Chicago/Turabian StyleHassan Hajabdollahi; Abdolsaeid Ganjehkaviri; Mohammad Nazri Mohd Jaafar. 2015. "Thermo-economic optimization of RSORC (regenerative solar organic Rankine cycle) considering hourly analysis." Energy 87, no. : 369-380.
A comprehensive thermodynamic study is conducted of a diesel based Combined Heat and Power (CHP) system, based on a diesel engine and an Organic Rankine Cycle (ORC). Present research covers both energy and exergy analyses along with a multi-objective optimization. In order to determine the irreversibilities in each component of the CHP system and assess the system performance, a complete parametric study is performed to investigate the effects of major design parameters and operating conditions on the system’s performance. The main contribution of the current research study is to conduct both exergy and multi-objective optimization of a system using different working fluid for low-grade heat recovery. In order to conduct the evolutionary based optimization, two objective functions are considered in the optimization; namely the system exergy efficiency, and the total cost rate of the system, which is a combination of the cost associated with environmental impact and the purchase cost of each component. Therefore, in the optimization approach, the overall cycle exergy efficiency is maximized satisfying several constraints while the total cost rate of the system is minimized. To provide a better understanding of the system under study, the Pareto frontier is shown for multi-objective optimization and also an equation is derived to fit the optimized point. In addition, a closed form relationship between exergy efficiency and total cost rate is derived.
Abdolsaeid Ganjehkaviri; Mohammad Nazri Mohd Jaafar. Energy Analysis and Multi-Objective Optimization of an Internal Combustion Engine-Based CHP System for Heat Recovery. Entropy 2014, 16, 5633 -5653.
AMA StyleAbdolsaeid Ganjehkaviri, Mohammad Nazri Mohd Jaafar. Energy Analysis and Multi-Objective Optimization of an Internal Combustion Engine-Based CHP System for Heat Recovery. Entropy. 2014; 16 (11):5633-5653.
Chicago/Turabian StyleAbdolsaeid Ganjehkaviri; Mohammad Nazri Mohd Jaafar. 2014. "Energy Analysis and Multi-Objective Optimization of an Internal Combustion Engine-Based CHP System for Heat Recovery." Entropy 16, no. 11: 5633-5653.
A narrow path exists to a sustainable solution which passes through careful steps of efficiency improvement (resource management) and provides environmental friendly energies. Thermal power plants are more common in many power production sites around the world. Therefore, in this current research study a comprehensive thermodynamic modeling of a combined cycle power plant with dual pressure heat recovery steam generator is presented. Since the steam turbine outlet quality is a restrictive parameter, optimization of three cases with different steam quality are conducted and discussed. In other hand, energy and exergy analysis of each components for these three different cases estimated and compared. Obtained results show that it is really important to keep the quality of the vapor at turbine outlet constant in 88% for the results to be more realistic and also optimization and data are more technically feasible and applicable.
A. Ganjehkaviri; M.N. Mohd Jaafar; Seyed Ehsan Hosseini. Optimization and the effect of steam turbine outlet quality on the output power of a combined cycle power plant. Energy Conversion and Management 2014, 89, 231 -243.
AMA StyleA. Ganjehkaviri, M.N. Mohd Jaafar, Seyed Ehsan Hosseini. Optimization and the effect of steam turbine outlet quality on the output power of a combined cycle power plant. Energy Conversion and Management. 2014; 89 ():231-243.
Chicago/Turabian StyleA. Ganjehkaviri; M.N. Mohd Jaafar; Seyed Ehsan Hosseini. 2014. "Optimization and the effect of steam turbine outlet quality on the output power of a combined cycle power plant." Energy Conversion and Management 89, no. : 231-243.
This research paper presents a study on a comprehensive thermodynamic modelling of a combined cycle power plant (CCPP). The effects of economic strategies and design parameters on the plant optimization are also studied. Exergoeconomic analysis is conducted in order to determine the cost of electricity and cost of exergy destruction. In addition, a comprehensive optimization study is performed to determine the optimal design parameters of the power plant. Next, the effects of economic parameters variations on the sustainability, carbon dioxide emission and fuel consumption of the plant are investigated and are presented for a typical combined cycle power plant. Therefore, the changes in economic parameters caused the balance between cash flows and fix costs of the plant changes at optimum point. Moreover, economic strategies greatly limited the maximum reasonable carbon emission and fuel consumption reduction. The results showed that by using the optimum values, the exergy efficiency increases for about 6%, while CO2 emission decreases by 5.63%. However, the variation in the cost was less than 1% due to the fact that a cost constraint was implemented. In addition, the sensitivity analysis for the optimization study was curtailed to be carried out; therefore, the optimization process and results to two important parameters are presented and discussed.
A. Ganjehkaviri; M.N. Mohd Jaafar; P. Ahmadi; Hasan Barzegaravval. Modelling and optimization of combined cycle power plant based on exergoeconomic and environmental analyses. Applied Thermal Engineering 2014, 67, 566 -578.
AMA StyleA. Ganjehkaviri, M.N. Mohd Jaafar, P. Ahmadi, Hasan Barzegaravval. Modelling and optimization of combined cycle power plant based on exergoeconomic and environmental analyses. Applied Thermal Engineering. 2014; 67 (1-2):566-578.
Chicago/Turabian StyleA. Ganjehkaviri; M.N. Mohd Jaafar; P. Ahmadi; Hasan Barzegaravval. 2014. "Modelling and optimization of combined cycle power plant based on exergoeconomic and environmental analyses." Applied Thermal Engineering 67, no. 1-2: 566-578.
In this study, a comprehensive thermodynamic modeling of a dual pressure combined cycle power plant is modeled. Also, to ensure the developed code, results are compared with an actual data taken from one of the Iranian power plant. The combined cycle power plant is equipped with a duct burner. In second part, by considering number of decision variables, the objective function is optimized. To have a better understanding and optimal design of the system, an optimization is performed. In our multi-objective optimization, first objective function comprises a set of component costs, the fuel cost injected into the combustion chamber, duct burner cost and the cost of exergy destruction. Second objective function is cycle exergy efficiency. Therefore, multi-objective optimization of this cycle is carried out using a computer simulation code written by using the genetic algorithm approach. Finally, the effect of cycle key parameters on these two objective functions is investigated. The results show that gas turbine temperature, compressor pressure ratio and pinch point temperatures are significant design parameters. It means that any changes in these design parameters lead to a drastic change in objective functions.
Abdolsaeid Ganjeh Kaviri; Mohammad Nazri Mohd. Jaafar; Tholudin Mat Lazim. Modeling and multi-objective exergy based optimization of a combined cycle power plant using a genetic algorithm. Energy Conversion and Management 2012, 58, 94 -103.
AMA StyleAbdolsaeid Ganjeh Kaviri, Mohammad Nazri Mohd. Jaafar, Tholudin Mat Lazim. Modeling and multi-objective exergy based optimization of a combined cycle power plant using a genetic algorithm. Energy Conversion and Management. 2012; 58 ():94-103.
Chicago/Turabian StyleAbdolsaeid Ganjeh Kaviri; Mohammad Nazri Mohd. Jaafar; Tholudin Mat Lazim. 2012. "Modeling and multi-objective exergy based optimization of a combined cycle power plant using a genetic algorithm." Energy Conversion and Management 58, no. : 94-103.