The Experts below are selected from a list of 102 Experts worldwide ranked by ideXlab platform
Seok Won Hong - One of the best experts on this subject based on the ideXlab platform.
-
water deoxygenation using a hollow fiber membrane contactor to prevent pipe corrosion for sustainable management of district heating systems a pilot scale study
Journal of Cleaner Production, 2020Co-Authors: Jiho Lee, Soomin Baek, Chanhee Boo, Aseom Son, Hoseok Jung, Sung Soo Park, Seok Won HongAbstract:Abstract Dissolved oxygen (DO) is a key factor affecting pipe corrosion in district heating systems (DHS). This study demonstrated effective deoxygenation of water in a DHS using a hollow fiber membrane contactor (HFMC) via systematic investigation from lab-to Pilot-Scale. First, deoxygenation efficiency was evaluated in a lab-scale HFMC with varying operating parameters including an effective membrane area, flow rate and feedwater temperature. Based on the results from the lab-scale investigation, a pilot HFMC system was designed with capacity of 1 m3 per day. To achieve a permeate DO concentration below 10 μg L−1 at feedwater temperatures of 20–60 °C, the vacuum degree needed to be lower than the saturated water vapor pressure of 10–120 Torr. In addition, the primary foulant for membrane fouling was organic matter in the make-up and district heating (DH) return water. A significant change in corrosion response was observed for pipe steel in the DHS after deoxygenation. Immersion tests for 14 days indicated that weight loss values had greatly reduced by the deoxygenation process from 39.3 to 1.3 mg cm−2 and from 21.9 to 2.1 mg cm−2 for steel pipe samples immersed in the make-up water and the DH return water of the DHS, respectively. This improved corrosion resistance from deoxygenation was interpreted by electrochemical analysis. As such, this study offers a Pilot-Scale Demonstration of the feasibility of a hollow fiber membrane-based deoxygenation process as an effective tool to prevent the corrosion of steel pipes.
Aldo Steinfeld - One of the best experts on this subject based on the ideXlab platform.
-
pilot scale Demonstration of advanced adiabatic compressed air energy storage part 1 plant description and tests with sensible thermal energy storage
Journal of energy storage, 2018Co-Authors: Lukas Geissbuhler, Giw Zanganeh, Simone Zavattoni, Maurizio Barbato, Viola Becattini, Andreas Haselbacher, Aldo SteinfeldAbstract:Abstract Experimental and numerical results from the world's first advanced adiabatic compressed air energy storage (AA-CAES) Pilot-Scale plant are presented. The plant was built in an unused tunnel with a diameter of 4.9 m in which two concrete plugs delimited a mostly unlined cavern of 120 m length. The sensible thermal-energy storage (TES) with a capacity of 12 MWhth was placed inside the cavern. The pilot plant was operated with charging/discharging cycles of various durations, air temperatures of up to 550 °C, and maximum cavern gauge pressures of 7 bar. Higher pressures could not be reached because of leaks that were traced mainly to the concrete plugs. Simulations using a coupled model of the TES and cavern showed good agreement with measurements. Cycle energy efficiencies of the TES were determined to lie between 76% and 90%. The estimated round-trip efficiency of the pilot plant was based on the measured TES performance and estimated performances of the other components, yielding values of 63–74%, which compares favorably with the usually quoted values of 60–75% for prospective AA-CAES plants.
-
pilot scale Demonstration of a 100 kwth solar thermochemical plant for the thermal dissociation of zno
Journal of Solar Energy Engineering-transactions of The Asme, 2014Co-Authors: W Villasmil, Daniel Wuillemin, Anton Meier, Marija Brkic, Aldo SteinfeldAbstract:A solar-driven thermochemical pilot plant for the high-temperature thermal dissociation of ZnO has been designed, fabricated, and experimentally demonstrated. Tests were conducted at the large-scale solar concentrating facility of PROMES-CNRS by subjecting the solar reactor to concentrated radiative fluxes of up to 4477 suns and peak solar radiative power input of 140 kWth. The solar reactor was operated at temperatures up to 1936 K, yielding a Zn molar fraction of the condensed products in the range 12–49% that was largely dependent on the flow rate of Ar injected to quench the evolving gaseous products.
-
packed bed thermal storage for concentrated solar power pilot scale Demonstration and industrial scale design
Solar Energy, 2012Co-Authors: Giw Zanganeh, Andrea Pedretti, Simone Zavattoni, Maurizio Barbato, Aldo SteinfeldAbstract:A thermal energy storage system, consisting of a packed bed of rocks as storing material and air as high-temperature heat transfer fluid, is analyzed for concentrated solar power (CSP) applications. A 6.5 MWhth Pilot-Scale thermal storage unit immersed in the ground and of truncated conical shape is fabricated and experimentally demonstrated to generate thermoclines. A dynamic numerical heat transfer model is formulated for separate fluid and solid phases and variable thermo-physical properties in the range of 20–650 °C, and validated with experimental results. The validated model is further applied to design and simulate an array of two industrial-scale thermal storage units, each of 7.2 GWhth capacity, for a 26 MWel round-the-clock concentrated solar power plant during multiple 8 h-charging/16 h-discharging cycles, yielding 95% overall thermal efficiency.
Aseom Son - One of the best experts on this subject based on the ideXlab platform.
-
water deoxygenation using a hollow fiber membrane contactor to prevent pipe corrosion for sustainable management of district heating systems a pilot scale study
Journal of Cleaner Production, 2020Co-Authors: Jiho Lee, Soomin Baek, Chanhee Boo, Aseom Son, Hoseok Jung, Sung Soo Park, Seok Won HongAbstract:Abstract Dissolved oxygen (DO) is a key factor affecting pipe corrosion in district heating systems (DHS). This study demonstrated effective deoxygenation of water in a DHS using a hollow fiber membrane contactor (HFMC) via systematic investigation from lab-to Pilot-Scale. First, deoxygenation efficiency was evaluated in a lab-scale HFMC with varying operating parameters including an effective membrane area, flow rate and feedwater temperature. Based on the results from the lab-scale investigation, a pilot HFMC system was designed with capacity of 1 m3 per day. To achieve a permeate DO concentration below 10 μg L−1 at feedwater temperatures of 20–60 °C, the vacuum degree needed to be lower than the saturated water vapor pressure of 10–120 Torr. In addition, the primary foulant for membrane fouling was organic matter in the make-up and district heating (DH) return water. A significant change in corrosion response was observed for pipe steel in the DHS after deoxygenation. Immersion tests for 14 days indicated that weight loss values had greatly reduced by the deoxygenation process from 39.3 to 1.3 mg cm−2 and from 21.9 to 2.1 mg cm−2 for steel pipe samples immersed in the make-up water and the DH return water of the DHS, respectively. This improved corrosion resistance from deoxygenation was interpreted by electrochemical analysis. As such, this study offers a Pilot-Scale Demonstration of the feasibility of a hollow fiber membrane-based deoxygenation process as an effective tool to prevent the corrosion of steel pipes.
Kristin Syverud - One of the best experts on this subject based on the ideXlab platform.
-
cellulose nanofibrils as rheology modifier in mayonnaise a pilot scale Demonstration
Food Hydrocolloids, 2020Co-Authors: Ellinor Baevre Heggset, Ragnhild Aaen, Trinelise Veslum, Marielle Henriksson, Sebastien Simon, Kristin SyverudAbstract:Abstract The applicability of cellulose nanofibrils (CNFs) as viscosifying agent in a starch-reduced low-fat mayonnaise and in an oil-reduced full-fat mayonnaise has been considered. For low-fat mayonnaise a 50 wt% reduction in the ordinary starch content was performed, while for full-fat mayonnaise, the oil content was reduced from 79 to 70 wt%. To study if the stability was affected when CNFs were added, analyses as visual and accelerated stability tests, droplet size measurements and rheology studies, determining the shear viscosity, and the loss and storage moduli, were conducted after 1 day, 1 week and 1 month of storage in room temperature. Even though changes in droplet size distributions and rheological properties indicated some coalescence, the visual stability was not changed after 1 month of storage for any of the samples. The decrease in viscosity and moduli inflicted by reduction of starch or fat, could be regained by the addition of CNFs at 0.75 wt % and 0.42 wt %, respectively. Based on the results in this work, mayonnaise with reduced starch or fat content can be produced when CNFs are used as a viscosifying agent.
-
cellulose nanofibrils as rheology modifier in mayonnaise a pilot scale Demonstration
Food Hydrocolloids, 2020Co-Authors: Ellinor Baevre Heggset, Ragnhild Aaen, Trinelise Veslum, Marielle Henriksson, Sebastien Simon, Kristin SyverudAbstract:Abstract The applicability of cellulose nanofibrils (CNFs) as viscosifying agent in a starch-reduced low-fat mayonnaise and in an oil-reduced full-fat mayonnaise has been considered. For low-fat mayonnaise a 50 wt% reduction in the ordinary starch content was performed, while for full-fat mayonnaise, the oil content was reduced from 79 to 70 wt%. To study if the stability was affected when CNFs were added, analyses as visual and accelerated stability tests, droplet size measurements and rheology studies, determining the shear viscosity, and the loss and storage moduli, were conducted after 1 day, 1 week and 1 month of storage in room temperature. Even though changes in droplet size distributions and rheological properties indicated some coalescence, the visual stability was not changed after 1 month of storage for any of the samples. The decrease in viscosity and moduli inflicted by reduction of starch or fat, could be regained by the addition of CNFs at 0.75 wt % and 0.42 wt %, respectively. Based on the results in this work, mayonnaise with reduced starch or fat content can be produced when CNFs are used as a viscosifying agent.
Jiho Lee - One of the best experts on this subject based on the ideXlab platform.
-
water deoxygenation using a hollow fiber membrane contactor to prevent pipe corrosion for sustainable management of district heating systems a pilot scale study
Journal of Cleaner Production, 2020Co-Authors: Jiho Lee, Soomin Baek, Chanhee Boo, Aseom Son, Hoseok Jung, Sung Soo Park, Seok Won HongAbstract:Abstract Dissolved oxygen (DO) is a key factor affecting pipe corrosion in district heating systems (DHS). This study demonstrated effective deoxygenation of water in a DHS using a hollow fiber membrane contactor (HFMC) via systematic investigation from lab-to Pilot-Scale. First, deoxygenation efficiency was evaluated in a lab-scale HFMC with varying operating parameters including an effective membrane area, flow rate and feedwater temperature. Based on the results from the lab-scale investigation, a pilot HFMC system was designed with capacity of 1 m3 per day. To achieve a permeate DO concentration below 10 μg L−1 at feedwater temperatures of 20–60 °C, the vacuum degree needed to be lower than the saturated water vapor pressure of 10–120 Torr. In addition, the primary foulant for membrane fouling was organic matter in the make-up and district heating (DH) return water. A significant change in corrosion response was observed for pipe steel in the DHS after deoxygenation. Immersion tests for 14 days indicated that weight loss values had greatly reduced by the deoxygenation process from 39.3 to 1.3 mg cm−2 and from 21.9 to 2.1 mg cm−2 for steel pipe samples immersed in the make-up water and the DH return water of the DHS, respectively. This improved corrosion resistance from deoxygenation was interpreted by electrochemical analysis. As such, this study offers a Pilot-Scale Demonstration of the feasibility of a hollow fiber membrane-based deoxygenation process as an effective tool to prevent the corrosion of steel pipes.