The Experts below are selected from a list of 9 Experts worldwide ranked by ideXlab platform
Ramadhan Aidil - One of the best experts on this subject based on the ideXlab platform.
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Exergy Analysis of Deodorization Unit at Palm Oil Refinery
2016Co-Authors: Ramadhan AidilAbstract:Deodorization is one of processing unit in the palm oil refinery facilities. This unit serves to deprive the unwanted odor of Bleached Palm Oil (BPO) and separates BPO into Refined Bleach Deodorized (RBD) and Palm Fatty Acid Deodorized (PFAD). Deodorization process also reduce volatile compound such as Free Fatty Acid (FFA) and sterol (steroid alcohol or mostly known as cholesterol) [1]. In practice, there are several problem encountered related to the performance and the process of the equipment itself. Such as unnecessary heat loss, improper selection of equipment, inappropriate maintenance, and ineffective process flow. The aim of this thesis work is to analyze the performance of thermal equipment in deodorization unit using Exergy analysis. Stream records in this thesis taken from a local palm oil refinery in Padang. Condition of deodorization process assume with no leaked and the pressure drop is neglected. The study only focus on thermal Exergy. Changes in potential and Kinetic Exergy will be neglected. The results show that the equipment with the highest efficiency is spiral heat exchanger B with 98.95%. While the equipment with the lowest efficiency is deodorized equipment with only 51.49%. The highest losses in deodorization unit is deodorized equipment with 1081.24 kW or 84.70%. It can be selected several improvement methods such as waste heat recovery and cogeneration system. Waste heat recovery steps could be added using heat exchanger to retrieve excess heat from vacuum heat exchanger or process stripper. While using cogeneration system, the use of boiler could be reduced into only one.
Mikhail Sorin - One of the best experts on this subject based on the ideXlab platform.
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Exergy analysis of the flow process and exergetic optimization of counterflow vortex tubes working with air
International Journal of Heat and Mass Transfer, 2020Co-Authors: Junior Lagrandeur, Sergio Croquer, Sebastien Poncet, Mikhail SorinAbstract:Abstract Vortex tubes can separate a pressurized gas stream into a cold stream and a hot stream. However, their use is limited by the low efficiency of the device. In this article, the Exergy efficiency considering transiting Exergy is used to analyze the thermal Exergy production and Exergy destruction in vortex tubes using a thermodynamic model and experimental data from the literature. The vortex tube exergetic efficiency reaches a maximum (up to 2.88%) for a cold mass fraction around 0.7 when both the hot and the cold outlets are considered as useful. Interestingly, 45% of the available Exergy is lost downstream of the vortex tube through pressure losses at this condition. Inside the vortex tube, Kinetic Exergy destruction represents a great portion of the irreversibilities within the tube. Furthermore, the thermodynamic model is used to maximize the efficiency of a single vortex tube. The optimization process increases the exergetic efficiency of the vortex tube to 4.4%, corresponding to an increase of 53% compared to the best experimental values. Additionally, the analysis demonstrates that increasing the cold outlet pressure increases the vortex tube exergetic efficiency for the same pressure ratio. Finally, the thermodynamic model is used to identify the vortex tubes cascade which better uses a compressed air source at 6 bars. A cold cascade with an ejector is also investigated. Results show that the cascade configuration could benefit from unused pressure from the first tube to increase the system exergetic efficiency.
Junior Lagrandeur - One of the best experts on this subject based on the ideXlab platform.
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Exergy analysis of the flow process and exergetic optimization of counterflow vortex tubes working with air
International Journal of Heat and Mass Transfer, 2020Co-Authors: Junior Lagrandeur, Sergio Croquer, Sebastien Poncet, Mikhail SorinAbstract:Abstract Vortex tubes can separate a pressurized gas stream into a cold stream and a hot stream. However, their use is limited by the low efficiency of the device. In this article, the Exergy efficiency considering transiting Exergy is used to analyze the thermal Exergy production and Exergy destruction in vortex tubes using a thermodynamic model and experimental data from the literature. The vortex tube exergetic efficiency reaches a maximum (up to 2.88%) for a cold mass fraction around 0.7 when both the hot and the cold outlets are considered as useful. Interestingly, 45% of the available Exergy is lost downstream of the vortex tube through pressure losses at this condition. Inside the vortex tube, Kinetic Exergy destruction represents a great portion of the irreversibilities within the tube. Furthermore, the thermodynamic model is used to maximize the efficiency of a single vortex tube. The optimization process increases the exergetic efficiency of the vortex tube to 4.4%, corresponding to an increase of 53% compared to the best experimental values. Additionally, the analysis demonstrates that increasing the cold outlet pressure increases the vortex tube exergetic efficiency for the same pressure ratio. Finally, the thermodynamic model is used to identify the vortex tubes cascade which better uses a compressed air source at 6 bars. A cold cascade with an ejector is also investigated. Results show that the cascade configuration could benefit from unused pressure from the first tube to increase the system exergetic efficiency.
Sergio Croquer - One of the best experts on this subject based on the ideXlab platform.
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Exergy analysis of the flow process and exergetic optimization of counterflow vortex tubes working with air
International Journal of Heat and Mass Transfer, 2020Co-Authors: Junior Lagrandeur, Sergio Croquer, Sebastien Poncet, Mikhail SorinAbstract:Abstract Vortex tubes can separate a pressurized gas stream into a cold stream and a hot stream. However, their use is limited by the low efficiency of the device. In this article, the Exergy efficiency considering transiting Exergy is used to analyze the thermal Exergy production and Exergy destruction in vortex tubes using a thermodynamic model and experimental data from the literature. The vortex tube exergetic efficiency reaches a maximum (up to 2.88%) for a cold mass fraction around 0.7 when both the hot and the cold outlets are considered as useful. Interestingly, 45% of the available Exergy is lost downstream of the vortex tube through pressure losses at this condition. Inside the vortex tube, Kinetic Exergy destruction represents a great portion of the irreversibilities within the tube. Furthermore, the thermodynamic model is used to maximize the efficiency of a single vortex tube. The optimization process increases the exergetic efficiency of the vortex tube to 4.4%, corresponding to an increase of 53% compared to the best experimental values. Additionally, the analysis demonstrates that increasing the cold outlet pressure increases the vortex tube exergetic efficiency for the same pressure ratio. Finally, the thermodynamic model is used to identify the vortex tubes cascade which better uses a compressed air source at 6 bars. A cold cascade with an ejector is also investigated. Results show that the cascade configuration could benefit from unused pressure from the first tube to increase the system exergetic efficiency.
Sebastien Poncet - One of the best experts on this subject based on the ideXlab platform.
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Exergy analysis of the flow process and exergetic optimization of counterflow vortex tubes working with air
International Journal of Heat and Mass Transfer, 2020Co-Authors: Junior Lagrandeur, Sergio Croquer, Sebastien Poncet, Mikhail SorinAbstract:Abstract Vortex tubes can separate a pressurized gas stream into a cold stream and a hot stream. However, their use is limited by the low efficiency of the device. In this article, the Exergy efficiency considering transiting Exergy is used to analyze the thermal Exergy production and Exergy destruction in vortex tubes using a thermodynamic model and experimental data from the literature. The vortex tube exergetic efficiency reaches a maximum (up to 2.88%) for a cold mass fraction around 0.7 when both the hot and the cold outlets are considered as useful. Interestingly, 45% of the available Exergy is lost downstream of the vortex tube through pressure losses at this condition. Inside the vortex tube, Kinetic Exergy destruction represents a great portion of the irreversibilities within the tube. Furthermore, the thermodynamic model is used to maximize the efficiency of a single vortex tube. The optimization process increases the exergetic efficiency of the vortex tube to 4.4%, corresponding to an increase of 53% compared to the best experimental values. Additionally, the analysis demonstrates that increasing the cold outlet pressure increases the vortex tube exergetic efficiency for the same pressure ratio. Finally, the thermodynamic model is used to identify the vortex tubes cascade which better uses a compressed air source at 6 bars. A cold cascade with an ejector is also investigated. Results show that the cascade configuration could benefit from unused pressure from the first tube to increase the system exergetic efficiency.
