Energy
Ehsan Mehrabi Gohari; iman pishkar; ehsan omidian
Articles in Press, Accepted Manuscript, Available Online from 25 March 2024
Abstract
In this Research, the Energy and Exergy analysis of the Steam Power-plant of the ninth refinery of South Pars Complex has been studie. Fristly, according to the thermodynamic characteristics, pressure, temperature , flow rate and the type of fluid in terms of saturated water, dense liquid and super heat ...
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In this Research, the Energy and Exergy analysis of the Steam Power-plant of the ninth refinery of South Pars Complex has been studie. Fristly, according to the thermodynamic characteristics, pressure, temperature , flow rate and the type of fluid in terms of saturated water, dense liquid and super heat steam, enthalpy and entropy quantities were calculated and then using the Energy and Exergy balance relationships, the losses and efficiency of various equipments have been calculated. The results of Energy analysis showed that Boiler with 62.09 MW, Drum 107 with 17.75 MW and Deaerator with 14.17 MW have the highest energy loss and the efficiency of the first law is 41%. Also, based on the results of Exergy analysis, Boiler with 94 MW, Heat exchanger with 5.297 MW and Drum 107 with 5.233 have the highest amount of Exergy destruction and the efficiency of second law is 33%. Also, the results showed that due to the use of the steam output from the turbine in other operating units in the studied refinery, the condensers have less Exergy destruction and Energy losses compared to other power-plants. In addition, by using the solution proposed in this research to heat the input air of the combustion chamber through hot water coming out of the Continues Blow Down(CBD), it is possible to significantly increase the Exergy of the input air.
Energy
iman pishkar; Ehsan Mehrabi Gohari
Articles in Press, Accepted Manuscript, Available Online from 22 April 2024
Abstract
The present work is the first study of its kind aimed at minimizing the energy consumption of the RO system pump and then finding the optimal configuration of a microgrid based on renewable energy in off-grid and on-grid modes. Comparing with traditional methods of using the power grid and diesel generators ...
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The present work is the first study of its kind aimed at minimizing the energy consumption of the RO system pump and then finding the optimal configuration of a microgrid based on renewable energy in off-grid and on-grid modes. Comparing with traditional methods of using the power grid and diesel generators to supply the required power for the RO system prompts decision-makers and investors in this field to better advance the industry based on the energy-economic-environmental analyses of this work. In this research, the initial phase involved an examination using WAVE V.1.82q software to assess the viability of purifying surface water to provide a daily water supply of 3220 m3, employing BW30-400 modules. Subsequently, efforts were made to minimize operational pressure and thus lower the operational costs of the system through the utilization of low-energy modules like XLE-440i. Lastly, the evaluation of the power supply for the RO pump system was carried out across six different scenarios using HOMER V.2.81 software. The simulation results indicated that in the most favorable scenario, the energy required per m3 of water treatment stands at approximately 0.53 kWh. When a diesel generator serves as a backup, the lowest electricity production cost is associated with the solar system at $0.355 per kWh, with solar energy contributing to 91% of electricity generation. On the other hand, when grid electricity is the backup source, the lowest electricity production cost amounts to $0.024 per kWh, with only 1% of electricity generated from solar energy.
Energy
I. Pishkar; S. M. Beigi
Abstract
With sensitive and important systems in hospitals requiring an uninterrupted power supply, finding solutions for power outages is becoming increasingly crucial. Iran's favorable potential for renewable energy makes wind and solar energy viable options to support hospital electricity needs and contribute ...
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With sensitive and important systems in hospitals requiring an uninterrupted power supply, finding solutions for power outages is becoming increasingly crucial. Iran's favorable potential for renewable energy makes wind and solar energy viable options to support hospital electricity needs and contribute to sustainable development goals. The present work investigates, for the first time, the electricity supply of a part of the Parsian Hospital in Shahrekord using HOMER software. The use of real electricity exchange data with the national grid and the new generation of tree-shaped wind turbines are unique advantages. Results show that an optimal renewable energy-based system consisting of two 1-kW solar cells and a 1-kW electric converter costs $0.111 per kWh and solar cells generate 3% or 2999 kWh/year. The optimal scenario produces 55193 kg of CO2 annually due to national grid electricity use, highlighting the importance of renewable energy adoption in hospitals.
