At present, the energy used for air conditioning in buildings urban areas accounts over 36% of total global consumption. Energy efficiency has become a critical factor planning cities worldwide. Courtyard hot are prime example approach traditional vernacular architecture to mitigate effects extreme weather. However, given challenge guaranteeing accurate modelling microclimates within these courtyards, their impact on demand been routinely overlooked by certification tools. This work examines...

Radiative cooling has gained significant attention in recent years for its passive heat evacuation capabilities. Numerous materials have been developed, but comparing their effectiveness proven challenging due to inconsistent experimental conditions. This study aims bridge this gap by evaluating the potential of various radiative under consistent climatic Using a validated transfer model, performance eleven was simulated twenty-two Urban Overheating-affected cities. The assessment considered...

de globo en estudios confort y medioambiente los edificios

Sustainable passive design strategies can reduce the energy consumption of buildings. In this regard, inner courtyards act as microclimate modifiers that enhance perception comfort in surrounding environment. The present study, through a pooled analysis experimental and numerical data, intends to assess beneficial effect have reducing buildings, especially for cooling demand. Accordingly, new methodology allowing use different data facades software tools assessment real performance buildings...

The paper investigates experimentally the thermal performance of a ventilated double skin facade (DSF) with phase change material (PCM) in its air channel, during heating season Mediterranean climate. Two identical house-like cubicles located Puigverd de Lleida (Spain) were monitored winter 2012, and one them, PCM was south wall. can operate under mechanical or natural ventilation mode control depends on weather conditions energetic demand building. experimental results conclude that even...

Abstract In this paper, we present a procedure to estimate the error in elliptic equations using element‐free Galerkin (EFG) method, whose evaluation is computationally simple and can be readily implemented existing EFG codes. The estimation of works very well all numerical examples for 2‐D potential problems that are presented here, regular irregular clouds points. Moreover, it was demonstrated method terms economy gives good performance. results show approximation may estimated via...

Driven by global climate objectives, the pursuit for eco-friendly refrigeration solutions has catalysed impressive advancements in sector. Ammonia, a historically utilized refrigerant, is now widely adopted light industrial applications, largely due to growth of Ultra-Low Charge package chillers. Opportunities, however, persist refining system components further diminish refrigerant charge, fostering safer and more efficient solutions. This paper focuses on optimizing oil separator geometry...

This work presents a study of ventilated hollow core slab system (VHCS) that obviates the need to completely replace an existing residential building. It is assimilated heat exchanger allow its effectiveness be studied as function area and airflow rate. The balance between energy consumed by fan evacuated also through use thermo-hydraulic performance factor (THPF), for which series cases were simulated CFD following methodology in configuration achieved means sequential analysis both thermal...

Passive cooling techniques such as night time cross ventilation can potentially provide substantialcooling energy savings in warm climates. The efficiency of is determined by three main factors: the external airflow rate room, flow pattern and thermal mass distribution. aim this paper to analyse effect enclosure shape situation inlet/outlet openings on total stored structure. This analysis presents a comprehensive sample typologies generate guidelines which help designer with distribution...

Radiant floor heating is becoming increasingly popular in cold climates because it delivers higher comfort levels more efficiently than conventional systems. Wood one of the surface coverings most frequently used radiant flooring, despite widely held belief that terms thermal performance no match for conductivity materials if a high energy intended. Given highest admissible resistance flooring finishes or generally accepted to be 0.15 m2K/W, wood would appear scantly appropriate choice....

En este artículo se analiza la eficiencia energética de una Fachada Ventilada Activa –FVA– aplicada a edificios oficinas en España para reducir demanda calefacción. El sistema fachada consiste hoja exterior 2 mm acero galvanizado y cavidad 3 cm donde el aire ventilación es precalentado invierno extraído verano. Tras definir 8 tipologías típicas, han obtenido 192 casos estudio los que consideran diferentes parámetros: superficie acristalada, orientación zona climática. cálculo ha sido llevado...

Assessing the performance or energy efficiency of a single construction element by itself is often futile exercise. That not case, however, when an designed, among others, to improve building harnessing renewable in process that requires source external energy. Harnessing acquiring growing interest Mediterranean climates as strategy for reducing consumed buildings. When such reduction oriented lowering demand, consists building’s needs with use elements able passively absorb, dissipate,...

Night ventilation has been applied successfully to many passively-cooled or low-energy office buildings. This paper analyses the thermal comfort achievable in buildings Spain according European standard EN 15251:2007. Furthermore, level is evaluated using Degree Hours (DH) criteria and maximum indoor temperature. Considering high interest of architects engineers evaluation optimal condition as a function building typology (8 typologies), glazing ratio (30% 60%) climate (12 different Climate...

AbstractIt has been found that, among the tools and methods available for energy calculation of double envelope elements, there are some debatable aspects such as: selection correlations calculating convective heat transfer coefficient procedure temperature air layer. In addition, validation models only refers to specific cases or no information is whether not a performed. This paper presents transient model using calculations coefficients specifically developed this type element. For...