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Abstract: This study presents an integrated design and optimization of an Organic Rankine Cycle (ORC) for the recovery of waste heat from aluminium production. Non-Linear Programming (NLP) models were developed, with the objectives of maximizing electricity production and the Net Present Value (NPV) of the system. The models account for optimizing the operating conditions and changes in thermodynamic features of the system. The developed models are applied to a case study of Slovenian aluminium company where the performance of three different working fluids (R245fa, R1234yf and R1234ze) are compared. The optimization is performed considering different temperatures and prices of produced hot water and electricity, minimum approach temperature (DTmin), concentration of CO2 in flue gas and temperature and flowrate of flue gas. Results show that the selected working fluids for the proposed waste heat-based ORC system have the potential to substitute up to about 830 kW of electricity in a sustainable and economic manner. Out of the three working fluids considered, R245fa showed up to 7.9% efficiency of the ORC cycle and was identified as the best performing working fluid considering both economic viability and the amount of electricity produced by the system, however the refrigerant inherently has higher GHG footprint.
Keywords: waste heat, waste heat utilization, aluminium industry, organic rankine cycle, power generation, optimization
Published in DKUM: 10.04.2025; Views: 0; Downloads: 1
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Abstract: The main purpose of this study was to examine how personal and organizational drivers influence the utilization of management tools aimed at supporting organizational working in Industry 4.0 settings. We built our research upon the recognized importance of management tools for organizational working under Industry 4.0 settings and explored the key personal and organizational drivers of management tool usage. Calculations were performed based on the responses of 222 employees working in organizations across Europe. The results revealed that, among personal drivers, a higher level of education leads to significantly higher usage of six sigma, rapid prototyping, outsourcing, customer relationship management, knowledge management, core competencies, and strategic planning. More experienced employees use significantly more six sigma, total quality management, supply chain management, knowledge management, and core competences than their less experienced peers. The impact of organizational drivers is substantially weaker, where only industry shows significant influence, indicating that lean production, six sigma, and supply chain management are used more in manufacturing than in service organizations. Gender, one’s position in the organization, and the organization size do not play a substantial role in management tool usage. Managers should recognize the role of personal and organizational drivers of management tool usage in order to more quickly implement Industry 4.0 principles in organizations.
Keywords: management tools, personal drivers, organizational drivers, utilization, organizations, Europe
Published in DKUM: 01.10.2024; Views: 0; Downloads: 11
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Abstract: Clinical pharmacy as an area of practice, education and research started developing around the 1960s when pharmacists across the globe gradually identified the need to focus more on ensuring the appropriate use of medicines to improve patient outcomes rather than being engaged in manufacturing and supply. Since that time numerous studies have shown the positive impact of clinical pharmacy services (CPS). The need for wider adoption of CPS worldwide becomes urgent, as the global population ages, and the prevalence of polypharmacy as well as shortage of healthcare professionals is rising. At the same time, there is great pressure to provide both high-quality and cost-effective health services. All these challenges urgently require the adoption of a new paradigm of healthcare system architecture. One of the most appropriate answers to these challenges is to increase the utilization of the potential of highly educated and skilled professionals widely available in these countries, i.e., pharmacists, who are well positioned to prevent and manage drug-related problems together with ensuring safe and effective use of medications with further care relating to medication adherence. Unfortunately, CPS are still underdeveloped and underutilized in some parts of Europe, namely, in most of the Central and Eastern European (CEE) countries. This paper reviews current situation of CPS development in CEE countries and the prospects for the future of CPS in that region.
Keywords: clinical pharmacy, cost-effective treatment, drug safety, drug utilization, health policy, medication adherence, medication errors, polypharmacy
Published in DKUM: 27.05.2024; Views: 190; Downloads: 15
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Abstract: The main purpose of this paper is to examine the utilization of management practices in catching-up and well-developed economies. Within that framework, the paper examines the utilization of management practices in Slovenian and Croatian organizations, as both are considered the representatives of catching-up economies from Central and East Europe (CEE), while also comparing the utilization of management practices in the two selected economies to the global use of management practices. Evidences about management practices utilization reveal that in well-developed economies in the forefront are management practices aiming to support customer relationship management, strength customer relations and customer satisfaction, while in Slovenia and Croatia prevail practices that are oriented toward optimization of the business and its processes. Based on the research results and the situation in organizations, a possible future pattern of management practice utilization in organizations operating in catching up economies is outlined, with the aim to reduce the developmental lag and increase competitiveness of those organizations. The paper also provides several practical implications for future utilization of management practices in catching-up economies. The sample of catching up-countries includes 155 responses from employees in Slovenian organizations and 185 from Croatian ones. Data for samples from well-developed economies are obtained from a global survey of management practices.
Keywords: management practices, utilization, catching-up economy, well-developed economy, international comparison
Published in DKUM: 04.07.2017; Views: 1011; Downloads: 139
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