1,720,971 research outputs found
Certificazione energetica degli edifici - valutazioni sull’applicazione della metodologia di calcolo della regione lombardia
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L'edificio energeticamente sostenibile : verifiche energetiche, strategie per la raccolta dati e tecniche d'intervento per edifici esistenti
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Prestazioni energetiche degli edifici residenziali – Esempi di calcolo secondo la norma UNI TS 11300
No full textAnalisi dei costi di costruzione e del tempo di ritorno d’investimento di un edificio progettato nelle varie classi energetiche
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A Method and Metrics to Assess the Energy Efficiency of Smart Working
No full textThe paper discusses the energy efficiency of smart working (SW) as a solution to traditional work-approach issues, with a focus on evaluating benefits for both employers and employees. Remote working, while offering environmental advantages such as reduced commuting and office space use, poses challenges in assessing its true impact. The study presents results from a dynamic analysis on a real residential building, typical of an architectural style diffused in northern Italy, revealing a 15% average increase in energy consumption when all work tasks are performed from home. To address concerns about the environmental impact of SW, the research proposes a method and metrics for evaluation. Four novel indices (SWEET, SEE, SSEE, and 4E) are introduced, providing a structured approach to assess the energy efficiency of SW initiatives. The paper outlines a methodology for data gathering and metric application, aiming to acquire quantitative insights and mitigate disparities arising from a transfer of burdens to employees. This contribution not only signifies a ground-breaking methodology but also addresses an unresolved research question concerning the evaluation of the actual energy efficiency of smart working implementations for both employers and employees. The results underscore the importance of understanding the nuances of SW’s impact on household energy usage and its broader implications for sustainability goals
Water Extraction from Air by Refrigeration—Experimental Results from an Integrated System Application
No full textWater is an indispensable resource for life. Several technologies have been studied and used in the past to extract water from the ground, the air or the sea. The technologies vary depending on community needs and resources. In developed countries, air conditioning systems are widespread, and the use of condensed water from air conditioning systems is of potential interest. In hot and dry climates, in arid regions where refrigeration processes represent a basic need for indoor comfort, advantages of an integrated design of HVAC (Heating, Ventilation and Air Conditioning) systems optimized for water production rather than for air treatment could be evaluated. In the current work, a real application, which embodies savings of both energy and drinking water, is presented. It represents an evolution of a previously studied integrated system to simultaneously provide air conditioning and water to a hotel. The main target of this system is to meet drinking water requirements and, secondly, to provide domestic water heating and primary air for a non-conditioned zone. Main features of the integrated system are outlined, the needs of the hotel are described, and calculations of water and energy savings are presented. Moreover, a simulation tool was developed with the aim to evaluate possible water savings in a one-year period and to improve the efficiency of the system. A method to verify the effectiveness of the integrated system is also described
Integrated Systems for Air Conditioning and Production of Drinking Water – Preliminary Considerations
No full textAbstractThe water vapor condensation in the HVAC system chillers can be employed to increase the sustainable use of resources by using the condensed water for domestic consumption. Preliminary investigation on a design of an integrated HVAC system for the air conditioning of a hotel combined with water production is presented. The calculations are referred to the climatic conditions of the Arab Emirates coast. The preliminary calculations show that the produced water could be efficiently used for various destinations and, in some cases, its treatment could be finalized to produce drinking water
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