Storage Equipment Research Articles

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At the present stage of development of the use of the Armed Forces and the National Guard, along with the improvement of means of destruction of troops, new methods of conducting operations have been developed and implemented in the leading countries of the world. Unlike in the past, when the most intense combat operations were conducted on the line of combat contact between the parties and in the near tactical depths, the maneuverable nature of combat operations causes intensive movement of vehicles in difficult road conditions with frequent overcoming of obstacles, which leads to increased wear of components and assemblies, which may result in the failure of weapons and military equipment. Obviously, during combat operations, weapons and military equipment will fail both as a result of enemy fire on troops and due to a decrease in the reliability of weapons and military equipment. In peacetime, the failure of weapons and military equipment in the Armed Forces and the National Guard of Ukraine is largely due to the duration of their operation and long-term storage, as the samples show deterioration of the technical condition of elements and materials due to their aging, corrosion, and the appearance of residual deformations in the details of components and assemblies. Storage of machinery and equipment is one of the main elements of operation. Reliability and constant readiness for use of machinery and equipment kept in storage is achieved by high quality of work on preparation of machines for storage, systematic monitoring of their technical condition, timely maintenance and testing during storage, as well as implementation of measures that ensure the removal and preparation of machinery and equipment for use after storage in a short time. Ensuring the serviceable condition and proper operation of technical means of food service intended for cooking and transportation of food in the field (for example, KP-125, KP-125M) is one of the main tasks facing the head of the food service now. Operation is the totality of all phases of a technical asset's existence from the moment it is taken into balance sheet accounting until it is written off, including periods of storage, transportation, intended use, as well as all types of maintenance and repair. Storage is the maintenance of serviceable and specially prepared (mothballed) technical means in a condition that ensures their storage, serviceability and readiness within the established timeframe. There are two types of storage: short-term storage for no more than three months and long-term storage for more than three months.

Prevalence of pesticide related occupational diseases among Indonesian vegetable farmers - A collaborative work.

This study was done to understand the prevalence of various occupational diseases including dry eyes, nail dystrophy, and neuropathy related to pesticide exposure in Indonesian local vegetable farmers. The data were collected through questionnaires and physical examination involving dermatology, neurology, and ophthalmology domains at Ngablak District, Magelang, Central Java directed to local vegetable farmers. Ocular Surface Disease Index (OSDI) questionnaire and the Schirmer test were used. Analysis was done using descriptive statistics using the Statistical Package for the Social Sciences (SPSS 21.0) and presented in tables. Inadequate spraying equipment and improper storage of pesticides were found. Out of 105 farmers, 41.9% experienced occupational skin diseases (OSD). Definite cognitive impairments were found in 3.4% of subjects but probable in 28.3% of subjects. Neuropathies were found in 61.7% of subjects, and dry-eyes syndrome were found in 28.78% of subjects. There was a high prevalence of peripheral neuropathy and tremor, dry eyes syndrome in one-third of the population, and the most common skin problem was nail discoloration, with a low incidence of contact dermatitis.

ОЦІНКА ПОТЕНЦІАЛУ ВИРОБНИЦТВА БІОГАЗУ ОСОБИСТИМИ СЕЛЯНСЬКИМИ ГОСПОДАРСТВАМИ

The purpose of this article is to assess the potential of biogas production by individual peasant farms. The relevance of the study lies in the need to assess the potential of biogas production by individual peasant farms from the waste products of animal husbandry and crop production. A set of general scientific and special methods was used in the research process: economic analysis; analysis and synthesis; graphic; deductive; inductive. It was established that biomass is a powerful source of available renewable energy, which makes its use in Ukraine extremely promising. The obtained results represent an informational basis for the development of waste processing of personal peasant farms into biogas and digestate. An analysis of the dynamics of waste generation of animal husbandry products in personal peasant farms was carried out. It was established that the main raw material for biogas production should be considered livestock waste, and the most productive raw material is bird droppings. The expediency of processing household waste into biogas has been proven. The need for development and improvement of biogas production technologies using raw materials from personal peasant farms was established, which should become a strategic priority of the post-war reconstruction of the state. It has been proven that the use of the existing potential will make it possible to produce more than 4.2 billion m3 of biomethane for the self-sufficiency of personal peasant farms with hot water supply and organic fertilizer (digestate) for fertilizing homestead plots. In order to popularize this type of production among the population, it is advisable to direct subsidies from the state budget to the purchase of appropriate equipment by individual peasant farms. It was established that the main restraining factor for the development of biogas production in private peasant farms is primarily the high cost of the relevant installations and related equipment (storage containers). When implementing programs of state subsidies for interested households, it is possible to achieve a solution to their energy independence issues in the short term.

Research of hydroabrasive wear resistance of organomineral coatings depending on operating environment conditions

The critical importance of corrosion protection puts it forward as a leading economic and applied problem for all countries. Costs associated with corrosion, even in developed countries, range from 1 to 3.5 per cent of gross domestic product (GDP). This article discusses issues related to the development of the composition of anti-corrosion materials from organo-mineral heterocomposites for use in structures for the storage and transportation of various aggressive liquids. Experiments were carried out in real operating conditions of equipment for storage and transportation of oil and oil products. Based on the study of the composition of associated water, taking into account the influence of mechanical impurities, the phenomena occurring on the surface of the metal were studied and the optimal composition was selected, the use of which will increase the service life.

Recent Progress of Graphene-Polyaniline Complex Electrode Materials for Supercapacitor

With the increasing energy consumption, it is urgent to find low cost, environmental protection and long-life energy storage equipment. With ultracapacitors, graphene material was attracted wide attention for their advantages about high specific capacitance, excellent rate performance and good electrical conductivity. The preparation methods, electrochemical properties and related mechanisms of graphene materials were summarized, with the purpose of studying the effects of different structures of graphene materials on the performance of supercapacitors, and to find graphene-based materials with excellent performance. Finally, the problems existing in graphene-complex electrode were analysed, and the future research focus was prospected.

Crosslinking modification and hydrogen bonding synergy to achieve high breakdown strength and energy density of PMMA-co-GMA/PVDF dielectric composite films.

Polymer-based dielectric materials have been used in film capacitors due to their rapid charge-discharge rate, lightness, and low cost. Nevertheless, the energy storage properties of these dielectric films were limited by their weak polarization ability and low discharge energy density. Herein, the solution casting method was used to prepare all-organic crosslinked composite films using linear methyl methacrylate-co-glycidyl methacrylate (MG) as the matrix and ferroelectric poly(vinylidene fluoride) (PVDF) as the organic filler. The crosslinked MG networks can enhance the breakdown strength, restrain dielectric loss, and keep high discharge efficiency. What's more, the presence of PVDF can compensate for the low electrical displacement, improve the permittivity, and overcome the brittleness of the crosslinked films. The optimal all-organic crosslinked dielectric film exhibited an ultrahigh breakdown strength of 800 MV m-1 and a high efficiency of 77.4%. The maximum energy density of the composite film reached up to 12.1 J cm-3, which was nearly 120% higher than the energy density of 5.6 J cm-3 of the pure MG film. The enhancement in energy storage properties is ascribed to the synergistic effects of chemical crosslinking and hydrogen bonding. This study offers a feasible method for all-organic polymer films to fabricate energy storage equipment.

Capacity Allocation Optimization Framework for Hydrogen Integrated Energy System Considering Hydrogen Trading and Long-Term Hydrogen Storage

As an essential part of the future national energy system, hydrogen energy has the advantages of clean, long-time scale energy storage and good complementary characteristics to electrical power, making it an important player in the low-carbon transformation of energies. However, the long timescale storage characteristics and tradability of hydrogen energy are rarely considered in existing capacity allocation optimization methods for hydrogen integrated energy systems(HIES). Meanwhile, the impact of the physical characteristics of the hydrogen storage equipment is rarely considered in the construction of HIES. Therefore, this paper proposes a new capacity allocation method for HIES in industrial park considering hydrogen trading and long-term hydrogen storage. The proposed capacity allocation optimization method is a bilevel mixed-integer linear programming model, which is solved by the reconfiguration decomposition algorithm. The nonlinear constraint problem due to the physical characteristics of the hydrogen storage device is solved by the Big-M method and the binary method. The proposed method can effectively improve the economy of HIES and reduce the cost of hydrogen production. Meanwhile, the reconstruction decomposition algorithm can effectively solve the bilevel mixed integer programing model. Case studies demonstrate that the proposed method can reduce hydrogen production economics by 28%. Considering hydrogen trading, the total investment and operating cost of HIES is reduced by 25%, while long-term hydrogen storage can reduce the cost of hydrogen production for HIES and reduce the impact of hydrogen trading fluctuations.

Electro-oxidation reconstitution of aluminium copper MOF-derived metal oxyhydroxides for a robust OER process.

It is common knowledge that the O2 evolution reaction (OER) is a crucial half-reaction in the electrolysis of water. However, it is currently difficult to create inexpensive OER electrode materials in a way that is efficient, simple, and environmentally friendly. In this research, metal oxy-hydroxides with numerous oxygen defects (M-OOHv) are created at surface of Cu foam (CF) using a unique, straightforward electro-oxidation reconstitution (ER) process. Different spectroscopic and microscopy methods are used to analyse the electrode characteristics of Al2Cu-MOF@M-OOHv-ER/CF; electrochemical measurements display a lower overpotential (η) of 366 mV @ 10 mA cm-2 and a Tafel slope of 95.2 mV dec-1 in 1.0 M KOH. X-Ray diffraction (XRD), scanning electron microscopy (SEM), and Raman studies confirm the phase transition of the metal-organic framework (MOF) to the M-OOH, which acts as the active site to boost the OER activity. Through spectroscopic and microscopic investigations, it is determined that the efficiency of bimetallic electrode materials and oxygen vacancies in the M-OOHv have an impact on the electron power density. The manufactured electrode material additionally showed good durability for 50 hours. As a result, the newly developed Al2Cu-MOF@M-OOHv-ER/CF nanomaterial has greater potential for both electrolysis of water and other energy storage equipment.

Optimization Method for Minimum Carbon Emission Operation of Comprehensive Energy Park Based on Dynamic Carbon Emission Factor

With the grand goals of “carbon peaking” and “carbon neutrality” being put forward, establishing an efficient comprehensive energy system and promoting the allocation and consumption of clean energy have become the challenges faced by many industrial parks in energy conservation and carbon reduction. Because the comprehensive energy park has various energy forms such as cold, heat, electricity, and gas, the energy structure is complex, and the renewable energy and load are highly volatile. Aiming at this problem, this paper builds a low-carbon operation model of comprehensive energy parks based on dynamic carbon emission factors, which can significantly improve the accuracy of the total carbon emission consumption in the park, and provide strong support for guiding the operation of equipment in the park and the charging and discharging of energy storage equipment.

Research on Multi-Objective Optimization Model of Industrial Microgrid Considering Demand Response Technology and User Satisfaction

In the process of wind power, coal power, and energy storage equipment participating in the operation of industrial microgrids, the stable operation of wind-storage industrial microgrids is guaranteed by considering demand response technology and user satisfaction. This paper firstly sorts out the status quo of microgrid operation optimization, and determines the main requirements for user satisfaction considering three types of load characteristics, demand response technology, power consumption benefit loss, user balance power purchase price and wind power consumption evaluation indicators in the system. Secondly, the operation architecture of the windstorage industrial microgrid is designed, and the multi-objective optimization model of the wind-storage industrial microgrid is established with the comprehensive operating cost and user satisfaction as the target variables, and the corresponding solution method is mentioned. Finally, a typical wind-storage industrial microgrid is selected for simulation analysis, and the results show that, (1) Considering the demand response technology, the comprehensive operating cost of the wind-storage industrial microgrid per day is 5292.63 yuan, the user satisfaction index is 0.953, and the wind power consumption rate reaches 100%. (2) By setting four scenarios, it highlights that the grid-connected operation mode is superior to the off-grid operation mode. Considering the demand response technology, the load curve can be optimized, and the time-of-use electricity price can be fully used to coordinate the operation of each unit, which enhances the wind power consumption capacity. The compromise solution of the system comprehensive operating cost and user satisfaction under the confidence level of 0.95 is obtained, namely (5343.22, 0.94). (3) The frontier curve shows that in the process of model solving, it is impossible to optimize any sub-objective by changing the control variables, which proves that there is a close relationship between the comprehensive operating cost of the system and the confidence level, which can provide effective guidance for the optimal operation of industrial microgrids.

Design and Implementation of Smart Energy Management System

In order to optimize the energy management of the industrial park, the technical architecture and the function of intelligent energy management system are set up using information technology of use fixed number of year, load, capacity, cost of investment, etc. of various equipment in the industrial park. All the data monitoring, collection and analysis are based on the energy consumption index of scientific management, realizing the optimal operation, the effects of energy conservation and emissions reduction and refined energy management, and promoting the economic benefits of the park. Based on the Guangzhou City Project, in order to improve the comprehensive efficiency of energy use in the park, this paper carries out offline debugging and online commissioning of energy storage equipment in the park.

The impact of the safety of passenger ship services on the development of water recreation: evidence from Indonesia

This research aims to assess the safety of ship passenger services as one of the efforts to promote water recreation on the Musi River, South Sumatera. Rivers in Indonesia, through their role as a means of moving goods and people, greatly influence transportation and tourism, especially water recreation. Without safe transportation, there will be no travel and tourism industry. The accident rate of river transportation in Indonesia, including on the Musi River, today is still relatively high, and there still is no care about the assessment of riverboat services safety. The safety assessment was done with the analysis method using gap analysis with the analysis technique of Importance Performance Analysis. The research was conducted in Wharf 16 Ilir Palembang with a sample of as many as 264 people, including ship operators, passengers, and regulators. The study finds first that most users of riverboat services on the Musi River tend to be unsatisfied. Second, the need to improve the information on the safety equipment storage and the availability of safety equipment use instructions. Based on the findings, to develop water recreation on the Musi River, boat condition setting, and boat passenger safety are essential factors to be prioritized since the passengers or tourists mainly consider them in using sea transportation.

Climate Change Resilience and Food Security through Water Management at Basedth district of Kampong Speu province.

This article explores climate change resilience in the water sector, and its relation to food security of poor farmers in rural of Cambodia. The research analyzed both quantitative and qualitative data by conducting a survey of 103 farmer households in Svay Chacheb and Tuol Sala communes of Basedth District, Kampong Speu province. Detailed interviews were conducted with poor households, village chiefs, commune councilors, and agriculture officials at the district level. The study found that the famers do not receive sufficient water for rice cultivation and daily consumption from the existing irrigation systems and wetlands. Additionally, storage equipment and mechanisms for resilience to the effects of climate change are limited. Most farmers spend in order to obtain sufficient water for agriculture activities such as growing crops and raising livestock. The farmers need to borrow from their neighbors and use their own existing resources when they are faced with a food shortage because support mechanisms from government agencies and Non-governmental Organization (NGOs) are limited.

델파이 방법을 이용한 대학 요트수업의 문제점 및 개선방안 모색

The purpose of this study is to analyze the problems of university yacht classes and suggest improvement using the delphi method measures to promote the future development direction of university yacht classes and further the qualitative and quantitative growth of marine leisure sports in universities. A group of experts involved in university yacht classes was selected as a population, and a total of 9 university yacht experts, university yacht administrators, and university yacht leaders were surveyed and studied using a purposeful sampling. Data processing analyzed the median, quartile, number of responses, and average for the degree of changeability and hope based on the linear formula, and the research results are as follows. First, the problems of university yacht classes were the lack of professional leaders, the lack of theory and practical skills, the qualty of classes decreased due to excessive staffing, the lack of post-class evaluation, the lack of equipment necessary for classes, and the lack of equipment storage facilities. Second, the improvement measures for the problems of university yacht classes were derived by training professional leaders, introducing self-directed education methods, organizing appropriate class personnel, applying systematic class programs step by step, supplying many equipment, and securing equipment storage facilities. Third, the possibility and degree of hope for the improvement of university yacht classes are highly likely to change and favor the degree of hope, such as securing a sense of safety and ethics, systematic post-evaluation after practice, centralized class due to weather problems, insurance registration and transfer of safety-related equipment.

Electrocatalytic CO 2 Reduction over Bimetallic Bi-Based Catalysts: A Review

Electrocatalytic CO ₂ Reduction over Bimetallic Bi-Based Catalysts: A Review

Design of Energy Storage for Assisting Extraction Condensing Unit to Peak Regulation and Frequency Modulation

Abstract Coupling energy storage system is one of the potential ways to improve the peak regulation and frequency modulation performance for the existing combined heat power plant. Based on the characteristics of energy storage types, achieving the accurate parameter design for multiple energy storage has been a necessary step to coordinate regulation. In this work, heat storage tank for peak regulation and flywheel energy storage for frequency modulation have been carried out, including the parameters design and performance evaluation for their charging (or discharging) rate and capacity, and the collaborative optimization of dual energy storage systems has been realized. First, the effects of increasing peak depth, load change rate (frequency modulation) range, and energy storage parameters are further analyzed. It is worth noting that the power curves of regional thermal and electrical loads would be adjusted according to the set requirements. Results showed that, the set rate of charge and discharge as well as the capacity of energy storage is conducive to improving the peak regulation depth of the system, and the peak regulation depth would reach its limit at 96.35 MW and 40.83 MWh in the calculation cases, respectively. On this basis, the cooperative regulation of dual energy storage can further increase the capability of peak regulation and frequency modulation. The extreme point is that when the charge and discharge rates are both 3 MW, and meanwhile the peak clipping coefficient, a self-defined parameter, reaches 22.34 MW. Furthermore, an example calculation is carried out to verify the reliability of the design method of energy storage parameter. The specific parameters set include the charging and discharging rate of energy storage tank equipment is 61.67 MW, and its capacity is 10.64 MWh, and the charging and discharging rate of flywheel energy storage equipment is 3 MW. The example results confirmed that there was only a very small error between the set results and the calculation results. Finally, the thermal-electric load region has been drawn to contrast the key roles of dual energy storage systems, which indicates that the heat storage tank can be used for peak regulation and flywheel energy storage for frequency modulation. Overall, the parameter design method for dual energy storage can meet the engineering requirements and provide a new direction for the subsequent parameter design of thermal power unit coupled energy storage system.

ВЛИЯНИЕ ПАРАМЕТРОВ МАТЕРИАЛА ПОВЕРХНОСТИ И ТЕМПЕРАТУРНЫХ РЕЖИМОВ НА ЕЕ ЗАГРЯЗНЯЕМОСТЬ

The main sources of contamination of dairy raw materials are the technological equipment for collection, storage and transportation. The processes of reducing the degree of contamination of surfaces in contact with raw milk - washing and disinfection - are considered. According to the applied method of influencing pollution: chemical, physical, physico-chemical, the material of equipment surfaces in contact with raw materials is selected. Some adhesive properties of materials in relation to a pollutant (raw milk) and to a detergent and disinfectant (water, an aqueous solution of a detergent) were studied. The concept of contamination is a property of a material characterized by the ability to reduce the adhesive properties of a pollutant in contact with the surface, introduced to characterize the material. The results of an experimental study of the influence of material parameters (polymers and metals) and temperature regimes on the adhesion properties of a pollutant - milk with a fat content of 3.2% are presented in the work. An analysis of the results showed certain dependences of the surface contamination on the contact angle of wetting and the temperature regimes of the process. The following conclusions are made based on the results of the study: the surface material and temperature conditions have the same effect on the adhesion properties of both the pollutant and the detergent; the polymeric material is subject to less contamination, which is characterized by lower costs of the detergent during the washing process; the temperature regime directly affects the adhesive properties of the material, pollutant and detergent, while an increase in temperature reduces the wetting angle, and a decrease in temperature increases it; The roughness of the material affects the contact angle.

Effect of Eccentric Tension on the Response of Wrinkle Defects in Carbon Fiber-Reinforced Composite Laminates

Composite pressure vessels (CPVs) have become the main equipment for hydrogen storage; however, the effect of defect in the laminates of CPVs is difficult to detect. In this paper, composite specimens containing wrinkle defects were investigated, and a heterogeneity model of a wrinkle defect is proposed. A three-dimensional finite element code was developed to predict the behavior of carbon fiber-reinforced composite laminates with wrinkle defects. The effect of the geometric asymmetry of clamping was distinguished from the whole response. It was found that wrinkle defects are sensitive to tension but completely insensitive to torsion and that the distortion of out-of-plane displacement is strongly dependent upon wrinkle defects. An optical–mechanical method based on fringe projection was presented to measure the response of wrinkle defects, which shows an outstanding performance on wrinkle location and deformation visualization.

Management of the Processes of Filling, Storage and Discharge of Grain Cargo at Transport Storage Facilities

The active transformation of transport links and redistribution of cargo fl requires intensive development of new promising areas of cargo transportation. It is necessary to use existing transport and technological systems to develop measures to increase productivity and reduce non-production costs. This approach provides for increasing the effi of the transport and logistics system.The objective of the article is to study, develop and specify transport and technological facilities intended to handle grain cargo and their individual, most significant elements.The organisation of transportation of various cargoes, taking into account the parameters of rolling stock, handling and storage equipment, is of decisive importance in determining the efficiency of transport and technological schemes.The paper considers the technology developed to move the material flow from the consignor to the consignee, which allows to supply cargo to the recipients at a fixed time while keeping its qualitative and quantitative characteristics. The study of the grain cargo transportation market made it possible to draw a conclusion about the importance of filling, discharge, and temporary storage operations for the entire operation chain.A proposed innovative design of a class of bunker silos could significantly expand their functionality together with the developed technology of their operation to handle grain cargo.Study on the analysis and modelling of the processes in proposed bunker silo considered physical and mechanical properties of the considered cargoes. The main parameters and factors, as well as the range of their influence on the efficiency of its operation were investigate for filling, storage and discharge stages.

Food safety practice and its associated factors among food handlers in food establishments of Mettu and Bedelle towns, Southwest Ethiopia, 2022

BackgroundFood safety and hygiene are currently a global health concern, especially in unindustrialized countries, as a result of increasing food-borne diseases (FBDs) and accompanying deaths. It has continued to be a critical problem for people, food companies, and food control officials in developed and developing nations.ObjectiveThe objective of the study was to assess food safety practices and associated factors among food handlers in food establishments in Mettu and Bedelle towns, south-west Ethiopia, 2022.MethodsA community-based cross-sectional study was conducted from February to March 2022, among 450 randomly selected food handlers working in food and drink establishments in Mettu and Bedelle towns, Southwest Ethiopia. Data was collected using an interviewer-administered structured questionnaire. The data was coded and entered into Epi Data version 3.1 before being exported to SPSS version 20 for analysis. Both bivariate and multivariable logistic regression models were fitted. An adjusted odds ratio and a 95% confidence level were estimated to assess the significance of associations. A p-value of < 0.05 was considered sufficient to declare the statistical significance of variables in the final model.ResultA total of 450 food handlers participated in the study, making the response rate 99.3%. About 202 (44.9%) of respondents had poor practices in food safety. Lack of supervision (AOR = 6.2, 95% CI: 3.37, 11.39), absence of regular medical checkups (AOR = 1.98; 95% CI: 1.14, 3.43), lack of knowledge of food safety practices (AOR =2.32; 95% CI: 1.38, 3.89), availability of water storage equipment (AOR =0.37; CI: 0.21, 0.64), and unavailability of a refrigerator (AOR =0.24; 95% CI: 0.12) were factors significantly associated with food safety practices.ConclusionThe level of poor food safety practices was remarkably high. Knowledge of food safety, medical checkups, service year as food handler, availability of water storage equipment, availability of refrigerator, and sanitary supervision were all significantly associated with food safety practice. Hence, great efforts are needed to improve food safety practices, and awareness should be created for food handlers on food safety.