Energy storage technologies and real life applications – A state of the art review

Energy storage is nowadays recognised as a key element in modern energy supply chain. This is mainly because it can enhance grid stability, increase penetration of renewable energy resources, improve the efficiency of energy systems, conserve fossil energy resources and reduce environmental impact of energy generation. Although there are many energy storage technologies already reviewed in the literature, these technologies are currently at different levels of technological maturity with a few already proven for commercial scale application. Most of the review papers in energy storage highlight these technologies in details, however; there remains limited information on the real life application of these technologies for energy storage purpose. This review paper aims to address this gap by providing a detailed analysis of real life application and performance of the different energy storage technologies. The paper discusses the concept of energy storage, the different technologies for the storage of energy with more emphasis on the storage of secondary forms of energy (electricity and heat) as well as a detailed analysis of various energy storage projects all over the world. In the final part of this paper, some of the challenges hindering the commercial deployment of energy storage technologies are also highlighted

Analisis Penentuan Harga Jual Jasa Servis Mobil Berdasarkan Time And Material Pricing Pada CV. Kombos Tendean Manado: Analysis Of The Determination Of The Sale Price Of Car Service Based On Time And Material Pricing At CV. Kombos Tendean Manad

Abstrak: Perusahaan produk dan jasa membutuhkan informasi keuangan yang akurat dan relevan untuk mengelola bisnis mereka secara efektif. Oleh karena itu, akuntansi menjadi sangat penting dalam operasi bisnis perusahaan produk dan jasa. Berikut ini beberapa hal yang dapat dikaitkan antara perusahaan produk dan jasa dengan akuntansi: Perencanaan Keuangan, Pelaporan Keuangan, Pengendalian Keuangan, Pajak,dan Evaluasi Kinerja. Dalam rangka mengelola keuangan mereka dengan baik, perusahaan produk dan jasa harus memperhatikan prinsip-prinsip akuntansi yang berlaku, seperti kepatuhan, kesesuaian, dan konsistensi dalam pencatatan dan pelaporan keuangan. Dengan demikian, akuntansi menjadi sangat penting dalam membantu perusahaan produk dan jasa mencapai tujuan keuangan mereka dan mempertahankan operasi bisnis yang sukses. Penelitian yang dilakukan ini bertujuan untuk menganalisis penentuan harga jual servis mobil pada CV. Kombos Tendean apa bila menggunakan metode Time and Material Pricing. Metode penelitian yang digunakan adalah kualitatif deskriptif. Dari hasil penelitian yang dilakukan oleh penelit, maka dapat diambil kesimpulan bahwa penggunaan metode Time and Material Pricing dapat memberikan pendapatan yang lebih tinggi dalam penggunaannya, sehingga perusahaan bisa mendapatkan pendapatan yang lebih baik jika menggunakan metode Time and Material Pricing. Sebaiknya CV. Kombos Tendean Dalam menerapkan metode time and material pricing, perusahaan juga perlu mempertimbangkan faktor-faktor seperti tingkat keahlian teknisi, waktu yang dihabiskan dalam pengerjaan, dan harga bahan atau suku cadang yang relevan. Dengan melakukan perhitungan yang cermat dan memastikan transparansi dalam harga jual jasa servis, CV. Kombos Tendean dapat meningkatkan kepercayaan pelanggan, mengoptimalkan penghasilan, dan memperbaiki manajemen keuangan perusahaan.   Kata kunci : Harga Jual Jasa Servis, Time and Material Pricing Abstract: Product and service companies need accurate and relevant financial information to manage their business effectively. Therefore, accounting becomes very important in the business operations of product and service companies. The following are some things that can be linked between product and service companies and accounting: Financial Planning, Financial Reporting, Financial Control, Taxes, and Performance Evaluation. In order to manage their finances properly, product and service companies must pay attention to applicable accounting principles, such as compliance, appropriateness, and consistency in financial recording and reporting. Thus, accounting becomes very important in helping product and service companies achieve their financial goals and maintain successful business operations. This research aims to analyze the determination of the selling price of car services at CV. Kombos Tendean Branch, if using the Time and Material Pricing method. The research method used is descriptive qualitative. From the results of research conducted by researchers, it can be concluded that the use of the Time and Material Pricing method can provide higher income in its use, so companies can get better income if they use the Time and Material Pricing method. Preferably CV. Kombos Tendean Branch In implementing the time and material pricing method, companies also need to consider factors such as the level of technician expertise, the time spent on work, and the price of the relevant materials or spare parts. By carrying out careful calculations and ensuring transparency in the selling price of services, CV. Kombos Tendean Branch can increase customer trust, optimize revenue, and improve company financial management.   Keywords : Service Selling Price, Time and Material Pricin

Adsorptive approach on nepholometric study of paint effluent using Tympanotonos fuscatus extract

Adsorptive study of paint effluent coagulation using T. fuscatus coagulant (TFC) is investigated. Effects of pH, dose, time, and temperature were investigated. Functional group, crystalline, morphology and thermal characteristics of samples were determined. Equilibrium data were analysed by Langmuir, Freundlich, Temkin, Frumkin, and Dubinin-Radushkevich (D-R) isotherms. Kinetic data were fitted to reversible first order, pseudo-first-order, pseudo-second-order, Elovich, intra-particle diffusion and Boyd kinetic models. Process Gibbs free energy (∆G°), enthalpy (∆H°) and the entropy (∆S°) were evaluated. The process was best described by Langmuir isotherm (R2 > 0.99; X2 ˂ 0.6; SSE ˂ 0.7). Pseudo second order best fitted the kinetic data. The process was spontaneous, feasible and endothermic. 97% optimal removal was achieved at pH 5. Tympanotonos fuscatus extract has potential for application as an effective coagulant while showing significant component of adsorptive phenomenon KEY WORDS: Paint effluent, Coagulation/flocculation, Adsorption, Tympanotonos fuscatus Bull. Chem. Soc. Ethiop. 2016, 30(3), 377-390.DOI: http://dx.doi.org/10.4314/bcse.v30i3.

Pengaruh Industri Gula Aren terhadap Tingkat Kesejahteraan Rumah Tangga di Desa Mopolo Kecamatan Ranoyapo

Palm sugar is one of the most important food needs for daily needs in the household and food and beverage industries, both large and small. The activity of making palm sugar has long been carried out by the people of Mopolo Village, even some of them have carried out these activities for decades. Palm sugar is not only consumed by itself but also for sale. High economic value is one of the factors for brown sugar makers. The palm sugar industry is located in Mopolo Village, Ranoyapo District, Minahasa Selatan District North Sulawesi. Mopolo Village has a land area after expansion of approximately 1700 ha. ''The Effect of the Palm Sugar Industry on the Household Welfare Levels of Industrial Owners in Mopolo Village, Ranoyapo District" has the formulation of the problem whether the Palm Sugar industry has an effect on the household welfare level of industrial owners in Mopolo Village, Ranoyapo District.This study aims to determine the effect of the Palm Sugar industry on the level of household welfare of industrial owners in Mopolo village, Ranoyapo. District. The object of this study is the owner of palm sugar industry in mopolo village, Ranoyapo sub-district, south Minahasa Sulawesi in the north.The results of hypothesis testing showed that industrial variables had a positive and significant effect on the level of household welfare of industrial owners. This study was the first study on palm sugar industry in mopolo village, Ranoyapo sub-district, minsel North Sulawesi

Freeze-drying of Beauveria bassiana suspended in Hydroxyethyl cellulose based hydrogel as possible method for storage: Evaluation of survival, growth and stability of conidial concentration before and after processing

Beauveria bassiana (Bb) is an entomopathogenic fungus considered as a valid alternative to chemical pesticides. However, Bb use is still limited due to short storage period and persistence in field conditions. Storage can be extended by reducing water content in products but an excessive drying can cause damage during rehydration. Persistence is promoted by using conidia into pellets or granules formulation. Integration of these two aspects can be challenging and costly. In this work, we present how utilizing a hydrogel containing Bb as growth substrate could potentially overcome both issues

Penggunaan Pupuk Hayati dan Pupuk Npk untuk Menekan Penyakit Layu dan Meningkatkan Pertumbuhan dan Hasil Tanaman Kacang Panjang (Vigna Sinencis L.)

The use of either liquid or carrier-based biofertilizers reduced the application of excessive inorganic fertilizers. The purpose of this research was to verified the effect of biofertilizer application of Bokelas Plus (BP) and NPK inorganic fertilizer on the intensity of dumping off diseases, growth and yield of long bean plants. The experiment have been done in experimental field of Agricultural Extension Center of Baguala Sub-district in Nania Village, Ambon city. The treatments were 400 kg NPK / ha, 300 kg NPK / ha, 200 kg NPK / ha, 75 kg BP / ha + 400 kg NPK / Ha, 75 kg BP / ha + 300 kg NPK / ha, and 75 kg BP / ha + 200 kg NPK / ha. The results showed that the application of biofertilizer BP and NPK fertilizer affected intensity of wilt disease caused by Scerotium rolfsii pathogen, plant height, long and pea pod weight. The best dose was 75 kg BP / ha + 300 kg NPK / ha. This experiment suggest that BP biofertilizer reduced the use of NPK fertilizer by 25%

Modelling of down-draft gasification of biomass - An integrated pyrolysis, combustion and reduction process

A gasification model is developed and implemented in Matlab to simulate a downdraft gasifier using wood as feedstock. The downdraft gasifier was conceptually divided into three zones: the pyrolysis zone, the combustion/oxidation zone and the reduction zone. A typical tar composition and its mole fraction, as reported in the literature was supplied as an input parameter in the model. The concentration of syngas and profiles of temperature along the reduction zone length were obtained by solving the mass and energy balances across each control volume and taking into account the rate of formation/consumption of the species according to different gasification kinetics. The simulation results from the model agreed closely with the experimental results. The syngas concentration was found to be about 1.1%, 17.3%, 22.8%, 9.0% and 49.8% for CH4, H2, CO, CO2, and N2 respectively and the corresponding LHV, CGE, CCE and yield were 4.7 MJ/N m3, 59.9%, 85.5% and 2.5 N m3/kg-biomass respectively at ER of 3.1 and fuel moisture content of 18.5 wt% Sensitivity analysis was carried out with this validated model for different air-fuel ratios, moisture contents and inlet air temperature. The analysis can be applied to produce specific design data for a downdraft biomass reactor given the fuel composition and operating conditions

Technical performance analysis and economic evaluation of a compressed air energy storage system integrated with an organic Rankine cycle

© 2017 Elsevier Ltd Energy storage becomes increasingly important in balancing electricity supply and demand due to the rise of intermittent power generation from renewable sources. The compressed air energy storage (CAES) system as one of the large scale ( > 100 MW) energy storage technologies has been commercially deployed in Germany and the USA. However, the efficiency of current commercial CAES plants still needs to be improved. In this study, an integrated system consisting of a CAES system and an organic Rankine cycle (ORC) was proposed to recover the waste heat from intercoolers and aftercooler in the charging process and exhaust stream of the recuperator in discharging process of the CAES system. Steady state process models of the CAES system and ORC were developed in Aspen Plus®. These models were validated using data from the literature and the results appear in a good agreement. Process analysis was carried out using the validated models regarding the impact of different organic working fluids (R123, R134a, R152a, R245fa, R600a) of ORC and expander inlet pressures of the ORC on system performance. It was found that integrating ORC with the CAES system as well as selecting appropriate working fluid was a reasonable approach for improving performance of the CAES system. The round-trip efficiency was improved by 3.32–3.95% using five working fluids, compared to that of the CAES system without ORC. Economic evaluation on levelized cost of electricity (LCOE) was performed using Aspen Process Economic Analyser® (APEA). Different working fluids in ORC and different power sources (e.g. wind and solar) associated with the integrated system were considered to estimate the LCOEs. It was found that the LCOEs for the integrated system were competitive with fossil-fuel fired power and even lower than offshore wind power and solar power. The proposed research presented in this paper hopes to shed light on how to improve efficiency and reduce cost when implementing CAES

Wild Boar (Sus scrofa) as Reservoir of Zoonotic Yeasts: Bioindicator of Environmental Quality

Wildlife animals are recognized as reservoirs for zoonotic fungi and their faeces might play an important role in introducing pathogens into the environment. Thought wild boar (Sus scrofa) population has dramatically increased across Europe, information about their possible role in dissemination of zoonotic pathogenic yeasts in the environment is scant. Therefore, fecal samples (n = 124) from wild boars from Campania region (Southern Italy) were collected and yeasts identified biochemically and molecularly by sequencing of the internal transcribed spacer region and their phylogenetical relationship assessed. The antifungal susceptibility profiles of yeasts were also investigated using AFST-EUCAST method. Yeasts were isolated from 50.1% of the samples with the highest occurrence in samples from the province of Salerno (61.1%). A total of 368 Candida strains belonging to nine species were identified, with Candida albicans (45.7%), followed by Candida krusei (15.2%), Kazachstania slooffiae (9.8%) and Candida parapsilosis (7.6%) as the most prevalent identified species. Among C. albicans four sequence types (i.e., ST1-ST4) were identified with an intraspecific nucleotide difference up to 0.21%. The ML tree grouped all representative sequence types as paraphyletic clades with those of the references yeast species, respectively and supported by high bootstrap values. Fluconazole was the less active drug whereas, posaconazole, voriconazole, and isavuconazole the most active one. No resistance phenomena were observed for C. albicans and high MICs values for 5FC, azoles and echinocandines were registered in non-albicans Candida spp. This study showed, for the first time, the important role of wild boars in dissemination of pathogenic fungi in the environment. The absence of resistance phenomena in the Candida spp. might reflect environmental free from residues of azoles antifungals pollution or chemicals and suggests the role of wild boar as bio indicators of environment quality

Integration of Antimicrobials and Delivery Systems: Synergistic Antibiofilm Activity with Biodegradable Nanoemulsions Incorporating Pseudopyronine Analogs

Multi-drug-resistant (MDR) bacteria, including methicillin-resistant Staphylococcus aureus (MRSA), pose a significant challenge in healthcare settings. Small molecule antimicrobials (SMAs) such as α-pyrones have shown promise as alternative treatments for MDR infections. However, the hydrophobic nature of many SMAs limits their solubility and efficacy in complex biological environments. In this study, we encapsulated pseudopyronine analogs (PAs) in biodegradable polymer nanoemulsions (BNEs) for efficient eradication of biofilms. We evaluated a series of PAs with varied alkyl chain lengths and examined their antimicrobial activity against Gram-positive pathogens (S. aureus, MRSA, and B. subtilis). The selected PA with the most potent antibiofilm activity was incorporated into BNEs for enhanced solubility and penetration into the EPS matrix (PA-BNEs). The antimicrobial efficacy of PA-BNEs was assessed against biofilms of Gram-positive strains. The BNEs facilitated the solubilization and effective delivery of the PA deep into the biofilm matrix, addressing the limitations of hydrophobic SMAs. Our findings demonstrated that the PA2 exhibited synergistic antibiofilm activity when it was loaded into nanoemulsions. This study presents a promising platform for addressing MDR infections by combining pseudopyronine analogs with antimicrobial biodegradable nanoemulsions, overcoming challenges associated with treating biofilm infections