Environmental and Climate Technologies最新文献

Numerical Evaluation of Wind Speed Influence on Accident Toxic Spill Consequences Scales 风速对事故有毒物质泄漏后果分级影响的数值评价

IF 1.4

Environmental and Climate Technologies Pub Date : 2023-01-01 DOI: 10.7250/conect.2023.046

Y. Skob, S. Yakovlev, O. Pichugina, Mykola Kalinichenko, Kyryl Korobchynskyi, A. Hulianytskyi

{"title":"Numerical Evaluation of Wind Speed Influence on Accident Toxic Spill Consequences Scales","authors":"Y. Skob, S. Yakovlev, O. Pichugina, Mykola Kalinichenko, Kyryl Korobchynskyi, A. Hulianytskyi","doi":"10.7250/conect.2023.046","DOIUrl":"https://doi.org/10.7250/conect.2023.046","url":null,"abstract":"Abstract This study aims to evaluate numerically the influence of wind speed on scales of environmental harmful consequences caused by accidentally spilled toxic liquid evaporated from the surface of a free-form outlined spill spot. A coupled problem of the gas-dynamic movement of a toxic air-mixture cloud in the atmosphere’s surface layer under the influence of wind and a negative toxic inhalation impact on a human in an accident zone is solved by means of mathematical modelling and computer experiment. A three-dimensional non-stationary mathematical model of the turbulent movement of a gas-air mixture is used for obtaining distribution of relative mass concentration of toxic gas impurities in time and space. A probabilistic impact model based on using a modernized probit analysis method is used to obtain fields of conditional probability of a fatal human injury resulting from toxic gas inhalation. This technique allows environmental safety experts assessing the scale of considered type technogenic accident consequences numerically depending on wind speed conditions and elaborating the means to mitigate them to acceptable levels.","PeriodicalId":46053,"journal":{"name":"Environmental and Climate Technologies","volume":"26 1","pages":"450 - 463"},"PeriodicalIF":1.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78285294","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}

引用次数: 0

Twinned Renewable Energy Accumulation: Case of Wind and Hydro Energy 双重可再生能源积累:以风能和水能为例

Environmental and Climate Technologies Pub Date : 2023-01-01 DOI: 10.2478/rtuect-2023-0051

Katarina Brence, Edgars Kudurs, Kārlis Valters, Dagnija Blumberga

{"title":"Twinned Renewable Energy Accumulation: Case of Wind and Hydro Energy","authors":"Katarina Brence, Edgars Kudurs, Kārlis Valters, Dagnija Blumberga","doi":"10.2478/rtuect-2023-0051","DOIUrl":"https://doi.org/10.2478/rtuect-2023-0051","url":null,"abstract":"Abstract Renewable energy sources (RES) are the key element of sustainable energy systems. To accommodate the intermittency of wind (and solar) electricity generation, energy storage is critical. The aim of the study was to evaluate the potential of wind energy storage in the existing hydropower plant reservoirs in Latvia with the pumped hydroelectric energy storage (PHES) technology, considering the current and projected future wind energy capacities. An algorithm was developed and used for data aggregation and analysis, calculations, and forecasting. The three River Daugava hydroelectric power plants are the largest electricity producers in Latvia, and their generation capacity depends on seasonal variations. Currently, Latvia's electricity generation from RES is the highest during the spring season when maximum hydropower potential is utilized. However, wind energy has a potential to grow and could supplement hydropower throughout the year. Decreasing the existing administrative procedure heaviness to faster achieve the climate neutrality targets and energy autonomy by increasing RES development in Latvia is a way to create sustainable energy production. A rational future scenario in Latvia is to expand wind parks and integrate pumped hydroelectric energy storage systems in the existing cascade hydropower plants.","PeriodicalId":46053,"journal":{"name":"Environmental and Climate Technologies","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135507955","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}

引用次数: 0

Life Cycle Impact Assessment of Microalgae and Synthetic Astaxanthin Pigments 微藻与合成虾青素色素的生命周期影响评价

IF 1.4

Environmental and Climate Technologies Pub Date : 2023-01-01 DOI: 10.2478/rtuect-2023-0018

Beate Zlaugotne, Fabian Andres Diaz Sanchez, J. Pubule, D. Blumberga

{"title":"Life Cycle Impact Assessment of Microalgae and Synthetic Astaxanthin Pigments","authors":"Beate Zlaugotne, Fabian Andres Diaz Sanchez, J. Pubule, D. Blumberga","doi":"10.2478/rtuect-2023-0018","DOIUrl":"https://doi.org/10.2478/rtuect-2023-0018","url":null,"abstract":"Abstract The marketability of fish depends on the visual appearance of the fish, so the feed ingredient pigment contributes to the nutritional value and visual appearance of the product. The benefits of a natural pigment derived from microalgae are the ecological benefits, as the culture can fix carbon and release oxygen. The economic aspect is a benefit of synthetic pigments. The Life Cycle Assessment (LCA) method was used to determine the environmental impact of natural and synthetic pigments. The results obtained from the LCA are expressed according to the impact categories defined by the Product Environmental Footprint Category Rules (PEFCR). A sensitivity analysis was also carried out comparing the environmental impacts of electricity generated with hydropower or using a field mix from Norway for the natural pigment. The total single score value for natural pigment is 1.17E+01 mPt and the largest impact is from sodium nitrate and electricity. The sensitivity analysis results for electricity from the country mix is 1.82E+01 mPt. The total single score value for synthetic pigment is 8.24E−01 mPt, with the largest impact from methanol. Synthetic pigments have a lower environmental impact than natural pigments, but a sensitivity analysis shows that the environmental impact can be reduced by choosing an alternative to electricity. It should be noted that the comparison presented represents a general comparison of alternatives, as the input data is derived from a literature review.","PeriodicalId":46053,"journal":{"name":"Environmental and Climate Technologies","volume":"62 1","pages":"233 - 242"},"PeriodicalIF":1.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80680336","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}

引用次数: 2

Optimal Participation of the Renewable Energy in Microgrids with Load Management Strategy 负荷管理策略下可再生能源在微电网中的最优参与

IF 1.4

Environmental and Climate Technologies Pub Date : 2023-01-01 DOI: 10.2478/rtuect-2023-0005

O. Candra, A. Chammam, U. Rahardja, A. Ramírez-Coronel, Abdullah Abdul Al-Jaleel, Ibrahim H. Al-Kharsan, I. Muda, Ghasem B Derakhshani, Mohamad Mehdi Rezai

引用次数: 2

An Empirical Approach to Optimize Nonlinear Problems of Domestic Energy Management Systems 国内能源管理系统非线性问题优化的实证方法

IF 1.4

Environmental and Climate Technologies Pub Date : 2023-01-01 DOI: 10.7250/conect.2023.034

F. Carreras, Harald Kirchsteiger

{"title":"An Empirical Approach to Optimize Nonlinear Problems of Domestic Energy Management Systems","authors":"F. Carreras, Harald Kirchsteiger","doi":"10.7250/conect.2023.034","DOIUrl":"https://doi.org/10.7250/conect.2023.034","url":null,"abstract":"Abstract Numerical optimization methods are used to reduce the operative costs and emissions of domestic houses comprising photovoltaic energy production and battery electrical storage combined with time-variant electricity prices. The modelling of the system comprises the different involved devices, energy flows and their constraints, and an objective function, which parametrizes the object of the optimization. The solution of the optimization problem defines the most adequate charging and discharging strategy of the battery into the future (prediction horizon). Power inverter efficiencies are usually modelled by assuming that they have constant values, and hence, that charging and discharging energy-flows lie on the most probably operating region of the inverter. A more realistic modelling of the power inverter efficiencies should consider a nonlinear parametrization of the efficiency curves. This consideration converts the optimization problem into a nonlinear one. It this paper, we modify a method to solve nonlinear optimization problems means iterations of linear optimization problems. The first iteration uses as seed values the solution of an optimization problem, which considers constant efficiencies of the battery inverter provided by the manufacturer of the battery. With the values of the solution of the optimization problem and with help of measured (dis)charging power curves and the optimized (dis)charging, new values of the efficiencies of the inverter of the battery will be determined, and the optimization problem will be with these values again computed. If a certain number of iterations is achieved or the values of the efficiencies converge, then the process stops.","PeriodicalId":46053,"journal":{"name":"Environmental and Climate Technologies","volume":"44 1","pages":"299 - 313"},"PeriodicalIF":1.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82166373","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}

引用次数: 0

Evaluating the Effectiveness of Agricultural and Forestry Policies in Achieving Environmental Goals Through Policy Documents 通过政策文件评估农林政策在实现环境目标方面的有效性

IF 1.4

Environmental and Climate Technologies Pub Date : 2023-01-01 DOI: 10.2478/rtuect-2023-0015

Lauma Balode, D. Blumberga

引用次数: 0

Operation of the Multiple Energy System with Optimal Coordination of the Consumers in Energy Market 能源市场中消费者最优协调下的多元能源系统运行

IF 1.4

Environmental and Climate Technologies Pub Date : 2023-01-01 DOI: 10.2478/rtuect-2023-0006

Ngakan Ketut Acwin Dwijendra, I. Arsana, S. Al-Hawary, A. S. Prakaash, Rosario Mireya Romero Parra, A. Turki Jalil, A. T. Hammid

引用次数: 4

Avoiding PV-Induced Overvoltage through Grid-Connected Batteries Using Model Predictive Control 利用模型预测控制避免并网电池电压过电压

Environmental and Climate Technologies Pub Date : 2023-01-01 DOI: 10.2478/rtuect-2023-0052

Harald Kirchsteiger, Sarah Landl

{"title":"Avoiding PV-Induced Overvoltage through Grid-Connected Batteries Using Model Predictive Control","authors":"Harald Kirchsteiger, Sarah Landl","doi":"10.2478/rtuect-2023-0052","DOIUrl":"https://doi.org/10.2478/rtuect-2023-0052","url":null,"abstract":"Abstract The problem of temporary overvoltage when integrating large renewable power plants into the existing grid is considered. A grid-connected battery energy storage system with an advanced predictive control algorithm is proposed to reduce the overvoltage in time periods of excessive renewable production. An approximative grid model is developed using system identification methods on regular operation data. A model predictive control algorithm utilizing predictions of load and generation determines the optimal operation strategy of the battery. A comparison in simulation between a reference case with PID control and the proposed algorithm shows a large reduction of the time spent in overvoltage conditions, especially in the case of consecutive days of high renewables production. The results suggest that energy storages combined with a predictive control strategy can effectively alleviate the overvoltage problem in renewables integration. Especially in the case when available storage capacity is comparatively low, a uniform overvoltage reduction can be realized. The method can potentially increase the PV host capacity of current grids.","PeriodicalId":46053,"journal":{"name":"Environmental and Climate Technologies","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135562317","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}

引用次数: 0

A New Approach to Water Treatment: Investigating the Performance of Compact Particulate Matter Collector for Use in Compact Flue Gas Condenser 一种新的水处理方法:研究用于紧凑型烟气冷凝器的紧凑型颗粒物收集器的性能

IF 1.4

Environmental and Climate Technologies Pub Date : 2023-01-01 DOI: 10.2478/rtuect-2023-0016

Oskars Švedovs, M. Dzikevics, V. Kirsanovs, I. Veidenbergs

引用次数: 0

Analysis of Textile Circularity Potential 纺织品圆势分析

IF 1.4

Environmental and Climate Technologies Pub Date : 2023-01-01 DOI: 10.7250/conect.2023.104

Megija Valtere, Tereza Bezrucko, D. Blumberga

{"title":"Analysis of Textile Circularity Potential","authors":"Megija Valtere, Tereza Bezrucko, D. Blumberga","doi":"10.7250/conect.2023.104","DOIUrl":"https://doi.org/10.7250/conect.2023.104","url":null,"abstract":"Abstract Global annual textile consumption has doubled in the last two decades and is expected to keep increasing. Since the textile system operates primarily in a linear way, it is highly polluting and creates a lot of waste. But nevertheless, it has a high potential for circularity since most textile products can be recycled or reused. Today most of the waste ends up in landfills, and less than 1 % is recycled back into textiles. This study aims to gather information and evaluate which textile product group has the highest potential for circular economy growth. It covers three main textile product streams: fashion, home, and technical textiles. The groups were compared using fifteen criteria: environmental impact, washes, landfilled waste, recycled waste, origin of fabric, projected lifetime, market demand, production volume, international trade, labour productivity, value added, energy efficiency of production technologies, innovation capacity, employment, and enterprises. Input values have been found for each sustainability indicator by using and mathematically transforming data from the scientific literature. The evaluation method used in this study was multi-criteria decision analysis. The results indicated that the fashion textile group has the most significant potential for circular economy development, mainly because it is the largest textile product stream, and the development of a circular economy could be cost-effective.","PeriodicalId":46053,"journal":{"name":"Environmental and Climate Technologies","volume":"39 1","pages":"220 - 232"},"PeriodicalIF":1.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89479448","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}

引用次数: 0