Ct&f-Ciencia Tecnologia Y Futuro最新文献_第2页

Low - medium enthalpy geothermal resource assessment in deep reservoirs of the Llanos Basin - Colombia 哥伦比亚Llanos盆地深层中低焓地热资源评价

4区工程技术

Ct&f-Ciencia Tecnologia Y Futuro Pub Date : 2022-06-29 DOI: 10.29047/01225383.380

Eduardo López- Ramos, Felipe Gonzalez-Penagos, Cesar A. Patiño, A. López

{"title":"Low - medium enthalpy geothermal resource assessment in deep reservoirs of the Llanos Basin - Colombia","authors":"Eduardo López- Ramos, Felipe Gonzalez-Penagos, Cesar A. Patiño, A. López","doi":"10.29047/01225383.380","DOIUrl":"https://doi.org/10.29047/01225383.380","url":null,"abstract":"The exploration and exploitation of hydrocarbons in sedimentary basins such as the Llanos Basin of Colombia, have enabled the acquisition of large volumes of surface and subsurface data, for assessing the geothermal potential of deep aquifers. The integrated analysis of geothermal play elements such as temperature, reservoir - fluid properties, and their depth in the basin, with the available hydrogeological-chemical data, allow us to define three regional plays as follows: Play A, characterized by naturally fractured reservoirs, in crystalline basement rocks - Paleozoic, with temperatures above 150 ºC, semi-confined aquifers; b) Play B, composed by Mesozoic quartz sandstone reservoirs, with primary porosity greater than 10%, temperatures between 75 ºC to 150 ºC, semi-confined aquifers, near to high hydraulic head zones with 500 m difference ranges in the regional piezometric surface; c) Play C, composed by Mesozoic quartz sandstones, high primary porosity, temperatures below 100 ºC, confined aquifers. Available well and Oil and Gas production data suggests that Play A is speculative, Play B is hypothetical, and Play C is known.","PeriodicalId":55200,"journal":{"name":"Ct&f-Ciencia Tecnologia Y Futuro","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80617726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Techno-economic assessment of small wind turbines under la Guajira-Colombia resource conditions 瓜地拉-哥伦比亚资源条件下小型风力发电机技术经济评价

4区工程技术

Ct&f-Ciencia Tecnologia Y Futuro Pub Date : 2022-06-29 DOI: 10.29047/01225383.400

Juan Pablo Jaramillo-Cardona, Juan Carlos Perafan-Lopez, José Luis Torres-Madroñero, C. Nieto-Londoño, J. Sierra-Pérez

{"title":"Techno-economic assessment of small wind turbines under la Guajira-Colombia resource conditions","authors":"Juan Pablo Jaramillo-Cardona, Juan Carlos Perafan-Lopez, José Luis Torres-Madroñero, C. Nieto-Londoño, J. Sierra-Pérez","doi":"10.29047/01225383.400","DOIUrl":"https://doi.org/10.29047/01225383.400","url":null,"abstract":"Hydroelectric plants broadly sustain Colombian electricity demand. However, wind power emerges to improve the Colombian energy matrix and capacity, satisfying the energy demand. Thus, this study evaluates the technical and economic feasibility of projects based on Small Wind Turbines (SWTs), based on the Colombian wind resource availability. Furthermore, due to the Colombian diversity of energy sources, sensitivity to climate changes and a high percentage of non-interconnected territory, the SWTs excels as an off-grid energy system alternative. For this purpose, the annual energy production and the capacity factor of 24 SWT and the wind resource in Puerto Bolívar, La Guajira, are considered. A techno-economic study that includes cash flow analysis and net present value is used to determine economic viability, considering a financing percentage sensitivity analysis. From the results, it can be concluded that an SWT based project increases its profitability by increasing the IRR value and lowering the financing percentage. Further, the best SWT models can be related to a higher capacity factor value based on the economic phase.","PeriodicalId":55200,"journal":{"name":"Ct&f-Ciencia Tecnologia Y Futuro","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87973562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Simulation of thermochemical processes in Aspen Plus as a tool for biorefinery analysis 在Aspen Plus中模拟热化学过程作为生物炼制分析的工具

4区工程技术

Ct&f-Ciencia Tecnologia Y Futuro Pub Date : 2021-12-27 DOI: 10.29047/01225383.372

Valentina Sierra Jimenez, Carlos M. Ceballos Marín, Farid Chejne Janna

{"title":"Simulation of thermochemical processes in Aspen Plus as a tool for biorefinery analysis","authors":"Valentina Sierra Jimenez, Carlos M. Ceballos Marín, Farid Chejne Janna","doi":"10.29047/01225383.372","DOIUrl":"https://doi.org/10.29047/01225383.372","url":null,"abstract":"The development of tools for the synthesis, design, and optimization of biorefineries requires deep knowledge of the thermochemical processes involved in these schemes. For this project, three models from scientific literature were implemented to simulate the processes: fast pyrolysis in a fluidized bed, fixed-bed, and fluidized-bed gasification using the Aspen PlusTM software. These models allow the user to obtain performance, consumption, and cost parameters necessary for the design and optimization of biorefineries schemes. The fast pyrolysis model encompasses a detailed description of biomass decomposition and kinetics of the process (149 reactions). In the fixed-bed gasification process, seven reactions that model the process have been integrated into two equilibrium reactors that minimize the Gibbs free energy. The model used for fluidized bed gasification considers both hydrodynamic and kinetic parameters, as well as a kinetic model that considers the change in the combustion reaction rate of biomass with oxygen leading to a change in temperature. Due to the complexity and detail of all these models, it was necessary to use FORTRAN subroutines and iterative Excel macros linked to Aspen PlusTM. Finally, the results of each simulation were validated with data from the model sources, as well as experimental results from the literature.","PeriodicalId":55200,"journal":{"name":"Ct&f-Ciencia Tecnologia Y Futuro","volume":"184 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80477389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Low field NMR as an alternative technique to estimate of density and viscosity in toluene-heavy oil mixtures 低场核磁共振作为估计甲苯重油混合物密度和粘度的替代技术

4区工程技术

Ct&f-Ciencia Tecnologia Y Futuro Pub Date : 2021-12-27 DOI: 10.29047/01225383.366

Maria Sandoval, Herin Valderrama P, Miranda Sánchez M, Daniel R. Molina Velasco, S. Muñoz N

{"title":"Low field NMR as an alternative technique to estimate of density and viscosity in toluene-heavy oil mixtures","authors":"Maria Sandoval, Herin Valderrama P, Miranda Sánchez M, Daniel R. Molina Velasco, S. Muñoz N","doi":"10.29047/01225383.366","DOIUrl":"https://doi.org/10.29047/01225383.366","url":null,"abstract":" The success of low field Nuclear Magnetic Resonance (LF-NMR) to estimate heavy oil properties depends on a good selection of mathematical models and fitting parameters. Since the correlations proposed are not universally applicable, in this study, a NMR published model was chosen and tuned to determine the density and viscosity of several mixtures of a Colombian heavy oil with toluene. The process began by mixing toluene with heavy oil to obtain several measuring points with properties similar to those of heavy oils. Each mixture was taken to a 7.5 MHz spectrometer at 40°C, where NMR parameters were acquired and used in the five pre-selected mathematical models. The reliability of viscosity measurements was analysed with the root mean square error (RMSE) and maximum absolute error (MAE). After the NLS regression process, the most accurate prediction was reached through the Burcaw model, with RMSE values of 40.55 cP. On the other hand, the density was estimated with the Wen correlation with results showing a relative error percentage of less than 1%. According to such error values, the tuned models are considered a starting point to extend the NRM technique use to other Colombian heavy oils with low uncertainty levels.","PeriodicalId":55200,"journal":{"name":"Ct&f-Ciencia Tecnologia Y Futuro","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89534372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling and analysis of a two-stage ORC for recovering waste heat of single flash geothermal cycle 单闪热循环余热回收两级ORC的建模与分析

4区工程技术

Ct&f-Ciencia Tecnologia Y Futuro Pub Date : 2021-12-27 DOI: 10.29047/01225383.383

Yashar Aryanfar, Arash Akhsheej, Kasra Ataei Sheykh, Shaban Mousavi Ghasemlou, J. L. García Alcaraz

{"title":"Modeling and analysis of a two-stage ORC for recovering waste heat of single flash geothermal cycle","authors":"Yashar Aryanfar, Arash Akhsheej, Kasra Ataei Sheykh, Shaban Mousavi Ghasemlou, J. L. García Alcaraz","doi":"10.29047/01225383.383","DOIUrl":"https://doi.org/10.29047/01225383.383","url":null,"abstract":"Reusing heat dissipation in thermodynamic cycles is an exciting proposal to increase efficiency. In this paper, a two-stage ORC (Organic Rankine Cycle) is proposed to recover and reuse wasted energy from an SFGC (Single Flash Geothermal Cycle). The working fluids studied for the recovery system include R227ea and R116 and R124 and R125. The effect of the main elements of system performance is investigated using sensitivity analyses. Exergy degradation of various components is also calculated. For working fluids R227ea and R116, the thermal efficiency improved by 7.66%, from 0.2023 to 0.2178. The system's thermal efficiency is improved from 0.2023 to 0.2177 by 7.61% using R124 and R125. The exergy efficiency of the initial working fluid improves by 15.04%, from 0.5044 to 0.5803. Further, the second pair of working fluids from 0.5044 to 0.5852, which indicates a 16.01% system efficiency improvement. 85% of the system exergy is eliminated through the expansion valve, turbine 3, heat exchanger 2, and mixer. Including the recovery phase in the base, SFGC will positively affect the power plant's performance.","PeriodicalId":55200,"journal":{"name":"Ct&f-Ciencia Tecnologia Y Futuro","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83205198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Improvement of lipid productivity on chlorella vulgaris using waste glycerol and sodium acetate 利用废甘油和乙酸钠提高普通小球藻的脂质产率

4区工程技术

Ct&f-Ciencia Tecnologia Y Futuro Pub Date : 2013-06-05 DOI: 10.29047/01225383.203

Laura-Lucía Estévez-Landazábal, A. Barajas-Solano, C. Barajas-Ferreira, V. Kafarov

{"title":"Improvement of lipid productivity on chlorella vulgaris using waste glycerol and sodium acetate","authors":"Laura-Lucía Estévez-Landazábal, A. Barajas-Solano, C. Barajas-Ferreira, V. Kafarov","doi":"10.29047/01225383.203","DOIUrl":"https://doi.org/10.29047/01225383.203","url":null,"abstract":"Although microalgae have great potential as a raw material for biodiesel production it is necessary to increase both biomass and lipids productivity. One way to achieve this goal is the implementation of mixotrophic cultures and the regulation of carbon/nitrogen ratio. The present work aims to improve the productivity of biomass and lipids in Chlorella vulgaris UTEX 1803 using waste glycerol from biodiesel production (1, 5 and 10% v/v) and sodium acetate (5, 10 and 20 mM) as carbon sources together with modification of the initial concentration of nitrogen (1.02; 1.47 and 2.94mM de NaNO3). All experiments were performed at 23±1ºC, with light: dark cycles of 12:12 h during 5 days. \u0000In biomass production was achieved a significant increase (80% higher that autothrophic cultures without modification). The best percentages of lipids exceeded control culture up to 2.18. Lipid productivities were also found 2.83 and 3.5 times greater than control. \u0000Results show the possibility of increasing the production of biomass and lipids by applying the carbon/nitrogen ratio using as a carbon source waste glycerol of the biodiesel industry that opens up great possibilities for the re-use of this residue thus increasing the sustainability of the process in general, Also has been proved that carbon/nitrogen ratio using sodium acetate is an interesting alternative due to his low cost carbon/nitrogen ratio using sodium acetate is an interesting alternative.","PeriodicalId":55200,"journal":{"name":"Ct&f-Ciencia Tecnologia Y Futuro","volume":"85 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2013-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76757727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 27

Determination of molecular weight of vacuum residue and their SARA fractions 真空渣油及其SARA馏分分子量的测定

4区工程技术

Ct&f-Ciencia Tecnologia Y Futuro Pub Date : 2010-07-01 DOI: 10.29047/01225383.291

A. León, M. Parra

引用次数: 6

Development of a correlation to estimate the fatigue strength for steels based on low-cost tests 基于低成本试验估算钢疲劳强度的相关性的发展

4区工程技术

Ct&f-Ciencia Tecnologia Y Futuro Pub Date : 2010-07-01 DOI: 10.29047/01225383.246

Alexander Martínez, A. Jaimes, A. Serna, Iván Uribe

引用次数: 5

Detecting and characterizing fractures in sedimentary deposits with stoneley waves 石波沉积层裂缝探测与表征

4区工程技术

Ct&f-Ciencia Tecnologia Y Futuro Pub Date : 2010-07-01 DOI: 10.29047/01225383.241

C. Escandon, Luis Montes

引用次数: 1

Separation of fractions from vacuum residue by supercritical extraction 超临界萃取分离真空渣油馏分

4区工程技术

Ct&f-Ciencia Tecnologia Y Futuro Pub Date : 2010-07-01 DOI: 10.29047/01225383.286

M. Parra, A. León, L. Hoyos

引用次数: 5