Pub Date : 2024-08-31DOI: 10.1088/1755-1315/1393/1/012002
Ryan Kyle M. Ramos, Joseph Albert M. Mendoza, Tsair-Fuh Lin, Yi-Ting Chiu and Melvin R. Pacquiao
Geosmin (GSM) and 2-Methylisoborneol (MIB) are organic contaminants that imparts an objectionable taste and odor in drinking water. This study attempts to enhance the adsorptive removal of these compounds using sodium hydroxide (NaOH)-treated powdered activated carbon (PAC). The modified adsorbent was characterized by infrared spectroscopy, which revealed that the basic treatment reduces the aromaticity of the PAC, particularly for the PAC treated with 2 M of NaOH. The effects of initial GSM and MIB concentration (100-300 ng/L), adsorbent dosage (5-15 mg/L), and NaOH concentration (0-2 M) on the percent removal of GSM and MIB were also examined by response surface methodology. The adsorption of both compounds is more sensitive to the initial adsorbate concentration and the adsorbent dosage. The NaOH treatment resulted in the increased adsorptive removal of both GSM and MIB, although to a lesser extent than the two adsorption parameters. The optimum values of PAC dosage, initial adsorbate concentration, and NaOH concentration are 12.925 mg/L, 101.197 ng/L, and 1.961 M for GSM and 13.933 mg/L, 110.000 ng/L, and 1.700 M for MIB. The performance of the adsorptive models was validated by coefficient of determination and analysis of variance, which suggests the statistical significance of the model and good fit between the predicted and observed variables.
{"title":"Response Surface Methodological Approach for the Adsorptive Removal of Geosmin and 2-Methylisoborneol on Sodium Hydroxide-Treated Powdered Activated Carbon","authors":"Ryan Kyle M. Ramos, Joseph Albert M. Mendoza, Tsair-Fuh Lin, Yi-Ting Chiu and Melvin R. Pacquiao","doi":"10.1088/1755-1315/1393/1/012002","DOIUrl":"https://doi.org/10.1088/1755-1315/1393/1/012002","url":null,"abstract":"Geosmin (GSM) and 2-Methylisoborneol (MIB) are organic contaminants that imparts an objectionable taste and odor in drinking water. This study attempts to enhance the adsorptive removal of these compounds using sodium hydroxide (NaOH)-treated powdered activated carbon (PAC). The modified adsorbent was characterized by infrared spectroscopy, which revealed that the basic treatment reduces the aromaticity of the PAC, particularly for the PAC treated with 2 M of NaOH. The effects of initial GSM and MIB concentration (100-300 ng/L), adsorbent dosage (5-15 mg/L), and NaOH concentration (0-2 M) on the percent removal of GSM and MIB were also examined by response surface methodology. The adsorption of both compounds is more sensitive to the initial adsorbate concentration and the adsorbent dosage. The NaOH treatment resulted in the increased adsorptive removal of both GSM and MIB, although to a lesser extent than the two adsorption parameters. The optimum values of PAC dosage, initial adsorbate concentration, and NaOH concentration are 12.925 mg/L, 101.197 ng/L, and 1.961 M for GSM and 13.933 mg/L, 110.000 ng/L, and 1.700 M for MIB. The performance of the adsorptive models was validated by coefficient of determination and analysis of variance, which suggests the statistical significance of the model and good fit between the predicted and observed variables.","PeriodicalId":14556,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Torrefaction of Macadamia husk (MAH) under a proposed exhaust gas atmosphere (O2 of 5%, CO2 of 15%, and balance N2 v/v) was conducted. It was performed in a batch torrefactor at temperature of 200, 250, and 300 °C and duration of 30 min. Influence of torrefaction temperature on the physicochemical properties, energy yield (EY), and energy mass co-benefit index (EMCI) was investigated. It was found that conventional torrefaction had a higher mass and energy yield than flue gas torrefaction. The flue gas remarkably enriches the calorific value of MAH due to the larger fixed carbon and lower volatile matter. The torrefied husks have contact angles between 118 and 133°, which are larger than 90°, representing hydrophobic fuel. The optimal flue gas torrefaction was suggested to operate at 200 °C and 30 min to reach the highest EMCI. Utilization of flue gas in torrefaction can be a choice to use waste heat energy efficiently and reduce the cost of air separation.
{"title":"Torrefaction performance of Macadamia husk under a flue gas atmosphere for solid biofuel applications","authors":"Kanit Manatura, Supaporn Klinkesorn, Kitipong Jaojaruek, Kunthakorn Khaothong and Preeda Prakotmak","doi":"10.1088/1755-1315/1393/1/012004","DOIUrl":"https://doi.org/10.1088/1755-1315/1393/1/012004","url":null,"abstract":"Torrefaction of Macadamia husk (MAH) under a proposed exhaust gas atmosphere (O2 of 5%, CO2 of 15%, and balance N2 v/v) was conducted. It was performed in a batch torrefactor at temperature of 200, 250, and 300 °C and duration of 30 min. Influence of torrefaction temperature on the physicochemical properties, energy yield (EY), and energy mass co-benefit index (EMCI) was investigated. It was found that conventional torrefaction had a higher mass and energy yield than flue gas torrefaction. The flue gas remarkably enriches the calorific value of MAH due to the larger fixed carbon and lower volatile matter. The torrefied husks have contact angles between 118 and 133°, which are larger than 90°, representing hydrophobic fuel. The optimal flue gas torrefaction was suggested to operate at 200 °C and 30 min to reach the highest EMCI. Utilization of flue gas in torrefaction can be a choice to use waste heat energy efficiently and reduce the cost of air separation.","PeriodicalId":14556,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-31DOI: 10.1088/1755-1315/1393/1/012008
Youstina Ramsis, Loizos Papaloizou, Ernestos Sarris and Demetris Vattis
Bentonite is a known material for its water-soluble nature and ability to develop exceptional colloidal properties when in aqueous environments and is Na+-rich. Some bentonites are not capable of achieving the desired colloidal properties due to either low smectite content and/or low or negligible Na+ ions content. An example of such bentonite is like the one used for this research work, which is waste K+-rich bentonite. Even though it previously was thermally Na2CO3-activated to upgrade its properties aiming to create colloids, it demanded further viscosity enhancement additives to achieve the required rheological and filtration control satisfying API standards when added in a complete water-based drilling fluid (WBF). We propose anionic polymerization to enhance the performance of the thermally activated waste K+-rich bentonite, at various concentrations. The basic objective is to investigate the polymer with the strongest amendment effect on the K+-rich bentonite by evaluating the rheological and filtration properties by means of Couette viscometry and LPLT tests respectively. Results collected were used to construct mathematical correlations suggesting that anionic polymers can be considered a very effective and efficient solution to reach the desired colloidal properties in WBF. The proposed solution, even with minor quantities, proves to be effective for waste K+-rich bentonite making the material suitable for WBF by creating composite structures that effectively reduce fluid losses and achieve the required viscosity control in WBF. Finally, the exploitation of this material aligns with the circular economy principles contributing to environmental sustainability development.
{"title":"On the colloidal and filtration properties of a polymer-amended waste K+-rich bentonite for use as a low-density solid additive in water-based drilling fluids","authors":"Youstina Ramsis, Loizos Papaloizou, Ernestos Sarris and Demetris Vattis","doi":"10.1088/1755-1315/1393/1/012008","DOIUrl":"https://doi.org/10.1088/1755-1315/1393/1/012008","url":null,"abstract":"Bentonite is a known material for its water-soluble nature and ability to develop exceptional colloidal properties when in aqueous environments and is Na+-rich. Some bentonites are not capable of achieving the desired colloidal properties due to either low smectite content and/or low or negligible Na+ ions content. An example of such bentonite is like the one used for this research work, which is waste K+-rich bentonite. Even though it previously was thermally Na2CO3-activated to upgrade its properties aiming to create colloids, it demanded further viscosity enhancement additives to achieve the required rheological and filtration control satisfying API standards when added in a complete water-based drilling fluid (WBF). We propose anionic polymerization to enhance the performance of the thermally activated waste K+-rich bentonite, at various concentrations. The basic objective is to investigate the polymer with the strongest amendment effect on the K+-rich bentonite by evaluating the rheological and filtration properties by means of Couette viscometry and LPLT tests respectively. Results collected were used to construct mathematical correlations suggesting that anionic polymers can be considered a very effective and efficient solution to reach the desired colloidal properties in WBF. The proposed solution, even with minor quantities, proves to be effective for waste K+-rich bentonite making the material suitable for WBF by creating composite structures that effectively reduce fluid losses and achieve the required viscosity control in WBF. Finally, the exploitation of this material aligns with the circular economy principles contributing to environmental sustainability development.","PeriodicalId":14556,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This research investigates the effects of the physical properties of air ducts and air supply conditions on 60% RH humidity distribution and human comfort in air-conditioned research laboratories. The study uses computational fluid dynamics in combination with the Taguchi experimental design to analyse the data. For the supply air, 25 fabric air ducts were used. The simulation results show the isometric flow trajectories of the relative humidity distribution in the room and the contours of the ankle and neck planes of a male Thai subject with a humidity distribution between 50% and 55% RH. By focusing on the ankle and neck plane, researchers understand how moisture control can be optimized to enhance comfort and performance.
{"title":"Analysis of air humidity distribution caused by fabric air duct arrangement for human comforts by computational fluid dynamic","authors":"Kunthakorn Khaothong, Supakij Boonpaijit, Kanit Manatura, Kitipong Jaojaruek and Weerachai Chaiworapuek","doi":"10.1088/1755-1315/1393/1/012005","DOIUrl":"https://doi.org/10.1088/1755-1315/1393/1/012005","url":null,"abstract":"This research investigates the effects of the physical properties of air ducts and air supply conditions on 60% RH humidity distribution and human comfort in air-conditioned research laboratories. The study uses computational fluid dynamics in combination with the Taguchi experimental design to analyse the data. For the supply air, 25 fabric air ducts were used. The simulation results show the isometric flow trajectories of the relative humidity distribution in the room and the contours of the ankle and neck planes of a male Thai subject with a humidity distribution between 50% and 55% RH. By focusing on the ankle and neck plane, researchers understand how moisture control can be optimized to enhance comfort and performance.","PeriodicalId":14556,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-31DOI: 10.1088/1755-1315/1393/1/012007
L Zárybnická, D Machová, L Dvořák, J Baar, P Mácová and M Kloiber
Surface weathering of wood is the degradation progressive change of the outer layer over time due to exposure to environmental conditions. Traditional oil paints offer several advantages when used on exterior wood surfaces - good durability, smooth finish, moisture resistance, excellent coverage, and gloss. Oil paints have a long history of protecting exterior wood surfaces, potentially lasting 50 to 100 years with minimal maintenance. One negative effect of this traditional finish is surface oxidation. As part of the study, paints were applied to the surface of the wood either in one layer (lazure) or in multiple layers (opaque). The properties of the substrate also affect the resulting quality and durability. Therefore, another sorting element was included in the study: the type of wood processing (machine vs. handmade). The work aimed to compare the durability of prepared oil paints on a wooden surface. The prepared samples were exposed to weather conditions corresponding to the Central European climate for 6 years. The samples were then analysed for chemical changes using Fourier transform infrared spectroscopy (FTIR), water contact angle determination and digital optical microscopy to preserve the paint layer. Multi-layer painted wood showed minimal colour changes even after 6 years, but the influence of the processing method of the wood itself could not be demonstrated.
{"title":"Impact of Environmental Conditions on the Preservation of Ageing Traditional Oil Paints on Wood Surfaces","authors":"L Zárybnická, D Machová, L Dvořák, J Baar, P Mácová and M Kloiber","doi":"10.1088/1755-1315/1393/1/012007","DOIUrl":"https://doi.org/10.1088/1755-1315/1393/1/012007","url":null,"abstract":"Surface weathering of wood is the degradation progressive change of the outer layer over time due to exposure to environmental conditions. Traditional oil paints offer several advantages when used on exterior wood surfaces - good durability, smooth finish, moisture resistance, excellent coverage, and gloss. Oil paints have a long history of protecting exterior wood surfaces, potentially lasting 50 to 100 years with minimal maintenance. One negative effect of this traditional finish is surface oxidation. As part of the study, paints were applied to the surface of the wood either in one layer (lazure) or in multiple layers (opaque). The properties of the substrate also affect the resulting quality and durability. Therefore, another sorting element was included in the study: the type of wood processing (machine vs. handmade). The work aimed to compare the durability of prepared oil paints on a wooden surface. The prepared samples were exposed to weather conditions corresponding to the Central European climate for 6 years. The samples were then analysed for chemical changes using Fourier transform infrared spectroscopy (FTIR), water contact angle determination and digital optical microscopy to preserve the paint layer. Multi-layer painted wood showed minimal colour changes even after 6 years, but the influence of the processing method of the wood itself could not be demonstrated.","PeriodicalId":14556,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-31DOI: 10.1088/1755-1315/1393/1/012003
Y Elhamarnah and H Qiblawey
In the face of escalating environmental concerns, particularly related to greenhouse gas emissions, this study delves into the potential of Deep Eutectic Solvents (DESs) as a sustainable alternative in gas separation technologies. Focusing on the significant emissions of CO2, SO2, and H2S from industrial processes, this work reviews the application of DESs for their capture and separation. The investigation on the physical properties of DESs, such as solubility, which is crucial for their efficacy as sorbents. This review includes a comprehensive analysis of various DES formulations, exploring their roles in CO2 absorption, SO2 removal, and the separation of other gases like H2S. Additionally, the study reveals that DESs, characterized by their biodegradability and environmental sustainability, offer promising performance in gas separation, aligning with the principles of green chemistry. This work underscores the importance of DESs as novel sorbents for gas purification and sets a foundation for future research aimed at enhancing their application on a broader industrial scale.
面对不断升级的环境问题，尤其是与温室气体排放相关的问题，本研究深入探讨了深共晶溶剂（DES）作为气体分离技术可持续替代品的潜力。针对工业生产过程中大量排放的 CO2、SO2 和 H2S，本研究回顾了 DESs 在捕获和分离这些气体方面的应用。对 DESs 的物理性质（如溶解性）进行了调查，这对其作为吸附剂的功效至关重要。本综述全面分析了各种 DES 配方，探讨了它们在吸收二氧化碳、去除二氧化硫以及分离 H2S 等其他气体方面的作用。此外，研究还揭示了 DES 具有生物降解性和环境可持续性的特点，在气体分离方面具有良好的性能，符合绿色化学的原则。这项工作强调了 DESs 作为新型气体净化吸附剂的重要性，并为今后旨在加强其在更广泛工业规模上应用的研究奠定了基础。
{"title":"Deep Eutectic Solvents as A Sustainable Solution in Gas Separation: A Mini Review","authors":"Y Elhamarnah and H Qiblawey","doi":"10.1088/1755-1315/1393/1/012003","DOIUrl":"https://doi.org/10.1088/1755-1315/1393/1/012003","url":null,"abstract":"In the face of escalating environmental concerns, particularly related to greenhouse gas emissions, this study delves into the potential of Deep Eutectic Solvents (DESs) as a sustainable alternative in gas separation technologies. Focusing on the significant emissions of CO2, SO2, and H2S from industrial processes, this work reviews the application of DESs for their capture and separation. The investigation on the physical properties of DESs, such as solubility, which is crucial for their efficacy as sorbents. This review includes a comprehensive analysis of various DES formulations, exploring their roles in CO2 absorption, SO2 removal, and the separation of other gases like H2S. Additionally, the study reveals that DESs, characterized by their biodegradability and environmental sustainability, offer promising performance in gas separation, aligning with the principles of green chemistry. This work underscores the importance of DESs as novel sorbents for gas purification and sets a foundation for future research aimed at enhancing their application on a broader industrial scale.","PeriodicalId":14556,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-31DOI: 10.1088/1755-1315/1393/1/012006
C Abdelhamid, A Latrach, I. Mellal, A. Dehdouh, L. Allam, M Rabiei and K. Venugopal
Produced water, a byproduct of oil and gas extraction, poses significant environmental and logistical challenges for the energy industry. This paper conducts a thorough analysis of produced water volumes from oil and gas wells in Wyoming, examining its chemical composition and potential for hydrogen production. Utilizing data from the Wyoming Oil and Gas Conservation Commission and U.S. Geological Survey, it offers insights into production trends and influencing factors. The study employs advanced analytical techniques to identify contaminants such as heavy metals, hydrocarbons, and salinity, guiding safe management strategies. With growing interest in hydrogen as a clean energy carrier, the paper evaluates the compatibility of produced water with hydrogen production processes, considering treatment procedures and energy efficiency. By addressing these aspects, it contributes to efforts for a sustainable transition to clean energy systems. This comprehensive examination sheds light on the potential of produced water as a resource, highlighting opportunities for its utilization in hydrogen production while mitigating environmental impacts.
{"title":"Wyoming's produced water: Analysis and green hydrogen potential","authors":"C Abdelhamid, A Latrach, I. Mellal, A. Dehdouh, L. Allam, M Rabiei and K. Venugopal","doi":"10.1088/1755-1315/1393/1/012006","DOIUrl":"https://doi.org/10.1088/1755-1315/1393/1/012006","url":null,"abstract":"Produced water, a byproduct of oil and gas extraction, poses significant environmental and logistical challenges for the energy industry. This paper conducts a thorough analysis of produced water volumes from oil and gas wells in Wyoming, examining its chemical composition and potential for hydrogen production. Utilizing data from the Wyoming Oil and Gas Conservation Commission and U.S. Geological Survey, it offers insights into production trends and influencing factors. The study employs advanced analytical techniques to identify contaminants such as heavy metals, hydrocarbons, and salinity, guiding safe management strategies. With growing interest in hydrogen as a clean energy carrier, the paper evaluates the compatibility of produced water with hydrogen production processes, considering treatment procedures and energy efficiency. By addressing these aspects, it contributes to efforts for a sustainable transition to clean energy systems. This comprehensive examination sheds light on the potential of produced water as a resource, highlighting opportunities for its utilization in hydrogen production while mitigating environmental impacts.","PeriodicalId":14556,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-31DOI: 10.1088/1755-1315/1393/1/011002
All papers published in this volume have been reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing. • Type of peer review: Double Anonymous • Conference submission management system: Morressier • Number of submissions received: 54 • Number of submissions sent for review: 18 • Number of submissions accepted: 13 • Acceptance Rate (Submissions Accepted / Submissions Received × 100): 24.1 • Average number of reviews per paper: 1.92 • Total number of reviewers involved: 36 • Contact person for queries: Name: Fiona LEE Email: fionalee@ase-society.org Affiliation: Society of Advanced Science and Engineering
{"title":"Peer Review Statement","authors":"","doi":"10.1088/1755-1315/1393/1/011002","DOIUrl":"https://doi.org/10.1088/1755-1315/1393/1/011002","url":null,"abstract":"All papers published in this volume have been reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing. • Type of peer review: Double Anonymous • Conference submission management system: Morressier • Number of submissions received: 54 • Number of submissions sent for review: 18 • Number of submissions accepted: 13 • Acceptance Rate (Submissions Accepted / Submissions Received <b>×</b> 100): 24.1 • Average number of reviews per paper: 1.92 • Total number of reviewers involved: 36 • Contact person for queries: Name: Fiona LEE Email: fionalee@ase-society.org Affiliation: Society of Advanced Science and Engineering","PeriodicalId":14556,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-31DOI: 10.1088/1755-1315/1393/1/012001
Yousef Altork and Duaa Salem
Adsorption chillers are environmentally friendly cooling systems that use non-hazardous refrigerants, such as CFCs or HCFCs, and are efficient and adaptable for various applications, particularly in utilizing waste heat or low-grade heat sources. The economic viability of a solar water-lithium bromide absorption system in large commercial university building with higher electricity rates in Jordan's central province was assessed using the Payback Period (PBP) methodology. The system's PBP was found to be 9.65 years, affirming its economic feasibility. To enhance economic viability, adjustments to the Coefficient of Performance (COP) were explored. Technical evaluations incorporating actual thermodynamic data revealed a COP of 0.785, an improvement from the assumed 0.70. Strategies such as lowering the condenser's working temperature or increasing the evaporator's operating temperature positively impacted the system's performance. Notably, at a condenser temperature of 47.5°C, the COP reached 0.77 with a cooling capacity of 21.48 kW, while at an evaporator temperature of 15°C, the COP and cooling capacity were 0.78 and 21.36, respectively. The study demonstrated that increasing the generator temperature led to a rise in COP, with the highest values of 0.785 and 22.68 kW achieved at 95.0°C. Furthermore, a techno-economic analysis revealed a reduced payback period of 8.66 years, emphasizing the influence of increased COP on the absorption air conditioning system's economic performance.
{"title":"Assessing the Techno-Economics of Solar-Assisted Absorption Air Conditioning in a University Building in Jordan","authors":"Yousef Altork and Duaa Salem","doi":"10.1088/1755-1315/1393/1/012001","DOIUrl":"https://doi.org/10.1088/1755-1315/1393/1/012001","url":null,"abstract":"Adsorption chillers are environmentally friendly cooling systems that use non-hazardous refrigerants, such as CFCs or HCFCs, and are efficient and adaptable for various applications, particularly in utilizing waste heat or low-grade heat sources. The economic viability of a solar water-lithium bromide absorption system in large commercial university building with higher electricity rates in Jordan's central province was assessed using the Payback Period (PBP) methodology. The system's PBP was found to be 9.65 years, affirming its economic feasibility. To enhance economic viability, adjustments to the Coefficient of Performance (COP) were explored. Technical evaluations incorporating actual thermodynamic data revealed a COP of 0.785, an improvement from the assumed 0.70. Strategies such as lowering the condenser's working temperature or increasing the evaporator's operating temperature positively impacted the system's performance. Notably, at a condenser temperature of 47.5°C, the COP reached 0.77 with a cooling capacity of 21.48 kW, while at an evaporator temperature of 15°C, the COP and cooling capacity were 0.78 and 21.36, respectively. The study demonstrated that increasing the generator temperature led to a rise in COP, with the highest values of 0.785 and 22.68 kW achieved at 95.0°C. Furthermore, a techno-economic analysis revealed a reduced payback period of 8.66 years, emphasizing the influence of increased COP on the absorption air conditioning system's economic performance.","PeriodicalId":14556,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The study of the properties of electrical power sources of ozonators through mathematical models is crucial for satisfying sanitary-hygienic and industrial needs. Ozone is a strong oxidant with disinfectant properties, making its application widespread. However, the efficiency of its production largely depends on the quality of the ozonators’ electrical power sources. In this research, we developed and utilized mathematical models aimed at determining the main electrical parameters of various types of ozonators used in ozone production. The results of the study show possibilities for enhancing the energy efficiency of ozonators and optimizing their operational parameters. Mathematical modeling serves as a significant tool for predicting the operating modes and necessary electrical power parameters of ozonators, helping to increase their overall productivity and reduce the cost of ozone production. During the analysis, we considered the stability of the electrical power sources of ozonators, their high-frequency power transmission, and the level of electrical energy consumption. Our research aimed to determine how these parameters affect the ozone production process and, considering these effects, to design and improve the electrical power sources of ozonators.
{"title":"Investigation of the properties of electrical sources of ozonators through mathematical models","authors":"Yessen Bagdollauly, Gulzada Yerkeldessova, Ayaulym Oralbekova, Elvira Chukenova, Nuraly Ilyassov, Assem Yerzhan, Palvan Kalandarov","doi":"10.1088/1755-1315/1390/1/012021","DOIUrl":"https://doi.org/10.1088/1755-1315/1390/1/012021","url":null,"abstract":"The study of the properties of electrical power sources of ozonators through mathematical models is crucial for satisfying sanitary-hygienic and industrial needs. Ozone is a strong oxidant with disinfectant properties, making its application widespread. However, the efficiency of its production largely depends on the quality of the ozonators’ electrical power sources. In this research, we developed and utilized mathematical models aimed at determining the main electrical parameters of various types of ozonators used in ozone production. The results of the study show possibilities for enhancing the energy efficiency of ozonators and optimizing their operational parameters. Mathematical modeling serves as a significant tool for predicting the operating modes and necessary electrical power parameters of ozonators, helping to increase their overall productivity and reduce the cost of ozone production. During the analysis, we considered the stability of the electrical power sources of ozonators, their high-frequency power transmission, and the level of electrical energy consumption. Our research aimed to determine how these parameters affect the ozone production process and, considering these effects, to design and improve the electrical power sources of ozonators.","PeriodicalId":14556,"journal":{"name":"IOP Conference Series: Earth and Environmental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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