Commercial PEMFC-based micro-CHP systems are operated by rule-based energy management strategies. Each of these strategies constitutes a different way to meet the household energy demand (following the heat demand, following the electricity demand, the maximum of the two, etc.). Previous studies demonstrate that which of them is the best - the one that manages to meet the demand at the lowest operating cost- on the particular scenario in which the micro-CHP system works (gas and electricity prices, annual energy demands, ability to export electricity to the grid, etc.). This paper aims to explore this dependence relationship and to deepen our understanding of it. To this end, a parametric analysis is conducted and the performances achieved by four rule-based operating strategies are compared. The parameters whose influence is studied, and through which the scenario is jointly characterized, are: (1) energy prices (electricity and natural gas), (2) feed-in tariff, (3) stack degradation, (4) climate and (5) heat to power ratio of the demand. The results show this dependence relationship in a clear and more comprehensive way, and offer a better understanding of its nature. From this improved understanding it can be inferred, among other things, that adapting the strategy to the scenario can generate annual savings of up to 14.5 percentage points. Moreover, this enhanced characterization of that dependence relationship can be useful for the design of a new operating strategy, a strategy that, without falling into the complexity that an optimal energy management approach (based on linear programming) involves, manages to exploit the savings potential of micro-CHP systems, thus facilitating their future mass commercialization.
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http://dx.doi.org/10.1016/j.heliyon.2024.e37685 | DOI Listing |
Arch Osteoporos
January 2025
Department of Endocrinology and Diabetes, Xiamen Clinical Medical Center for Endocrine and Metabolic Diseases, Xiamen Diabetes Institute, The First Affiliated Hospital of Xiamen University, No. 55 Zhenhai Road, Xiamen, 361003, China.
Unlabelled: Our study investigated trends in osteoporosis management in Xiamen from 2012 to 2021, revealing improvements in screening and treatment, although medication use remained low. Additionally, we identified factors that may influence medication use and emphasized the importance of effective osteoporosis management strategies.
Purpose: The goal of the current study is to explore trends in assessment, diagnosis after fragility fractures, and osteoporosis treatment among hospitalized patients in Xiamen, China, between 2012 and 2021.
Appetite
January 2025
Edith Cowan University, Building 21, 270 Joondalup Drive, Joondalup, Perth, Western Australia, 6027; The University of Western Australia, 35 Stirling Highway, Nedlands, Perth, Western Australia, 6009; Telethon Kids Institute, PO Box 855, West Perth, Western Australia, 6872. Electronic address:
Children are often exposed to unhealthy outdoor food advertisements during the school commute. This exposure can have negative public health consequences given childhood weight gain has been linked to the marketing of energy-dense and nutrient-poor foods. This study aimed to explore schoolchildren's lived experiences and attitudes towards outdoor advertising surrounding their schools.
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December 2024
Department of Orthopedics and Traumatology, Faculty of Medicine, Universitas Airlangga, East Java, Surabaya, Indonesia; Department Orthopedics and Traumatology, Dr. Soetomo General Academic Hospital, East Java, Surabaya, Indonesia. Electronic address:
Introduction And Importance: Multifocal fractures in a single upper extremity represent a significant clinical challenge, often resulting from high-energy impacts such as motor vehicle accidents or severe falls. These injuries require complex, multifaceted approaches in management, spanning initial acute care to long-term rehabilitation. This paper examines the complexities of diagnosing, treating, and rehabilitating multifocal upper extremity fractures, highlighting the importance of timely intervention and a multidisciplinary approach to maximize functional recovery, minimize long-term disability and the prognosis.
View Article and Find Full Text PDFJ Environ Manage
January 2025
Department of Accounting and Finance, Nottingham Trent University, Nottingham, UK. Electronic address:
In the context of global sustainability goals, it is imperative to examine the interplay between emerging financial technologies and environmental objectives, which in turn offers insights into the implications of such technologies on sustainable investments and environmental policy decisions. Accordingly, this study investigates the influence of Bitcoin's energy consumption (BEC), as a representative of the cryptocurrency market, on the regional green economy indices of the United States, Europe, and Asia. Utilizing both unfiltered and filtered data, we conduct empirical analyses from both static and dynamic perspectives to account for the causal relationships that emerged during critical market developments, employing novel algorithms including forward recursive, rolling windows, and recursive rolling.
View Article and Find Full Text PDFJ Environ Manage
January 2025
Bioenergy Research Institute - IPBEN, UNESP, Institute of Chemistry, Araraquara, SP, Brazil; São Paulo State University (UNESP), Institute of Chemistry, Campus Araraquara, Department of Engineering, Physics and Mathematics, Rua Prof. Francisco Degni, 55, 14800-900, Araraquara, SP, Brazil. Electronic address:
Waste-to-energy technologies involve the conversion of several wastes to useful energy forms like biogas and biochar, which include biological and thermochemical processes, as well as the combination of both systems. Assessing the economic and environmental impacts is an important step to integrate sustainability and economic viability at anaerobic digestion systems and its waste management. Energy production, CO emissions, cost analysis, and an overall process evaluation were conducted, relying on findings from both laboratory and pilot-scale experiments.
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