Solar gain
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Radiative cooling of solar absorbers using a visibly transparent photonic crystal thermal blackbody Open
Significance The coldness of the universe is an enormous but strikingly underexploited thermodynamic resource. Its direct utilization on Earth therefore represents an important frontier for renewable energy research. In many applications, …
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Smart Electrochromic Windows to Enhance Building Energy Efficiency and Visual Comfort Open
Electrochromic systems for smart windows make it possible to enhance energy efficiency in the construction sector, in both residential and tertiary buildings. The dynamic modulation of the spectral properties of a glazing, within the visib…
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Review of cooling techniques used to enhance the efficiency of photovoltaic power systems Open
Photovoltaic (PV) panels are one of the most important solar energy sources used to convert the sun’s radiation falling on them into electrical power directly. Many factors affect the functioning of photovoltaic panels, including external …
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Efficiency improvement of flat plate solar collector using reflector Open
Solar collectors are the main components of a solar heating system. The collectors collect the sun's energy, transform this radiation into heat, and then transfer this heat into a fluid, water or air, which has many household or industrial…
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A study on the comparative review of cool roof thermal performance in various regions Open
Energy demand is growing significantly worldwide to create thermal comfort in buildings. Air-conditioning is contributing to energy consumption at a massive scale in the residential and commercial sectors. The roof is one of the most criti…
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Giant Modal Gain Coefficients in Colloidal II–VI Nanoplatelets Open
Modal gain coefficient is a key figure of merit for a laser material. Previously, net modal gain coefficients larger than a few thousand cm–1 were achieved in II–VI and III–V semiconductor gain media, but this required operation at cryogen…
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Transparent Polymer Coatings for Energy-Efficient Daytime Window Cooling Open
Solar and thermal management of transparent windows is important for the energy efficiency of human-made structures. Functional layers that partially block solar radiation would also be heated by sunlight, thus accelerating the interior he…
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Global technological advancement and challenges of glazed window, facade system and vertical greenery-based energy savings in buildings: A comprehensive review Open
There are many factors that have a major influence on reducing the energy expenditure in building sector. This research aims at qualitative and quantitative assessment of those factors such as double glazed windows, vertical greenery syste…
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Experimental study of PCM-enhanced building envelope towards energy-saving and decarbonisation in a severe hot climate Open
Phase change materials (PCMs)-enhanced building envelope has received much attention in recent years as an effective solution to enhance building thermal performance. Nevertheless, minimal experimental studies considering PCM influential a…
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Dynamic glazing with switchable solar reflectance for radiative cooling and solar heating Open
Dynamic control of sunlight entering a building through glazing panels (e.g., windows, curtain walls, and skylights) is essential for reducing building energy consumption. Here, we demonstrate a dual-mode glazing panel with switchable refl…
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Energy performance of a ventilated double skin facade with PCM under different climates Open
New policies are being promoted worldwide to reduce the energy consumption for space heating and\n\t\t\t\t cooling in the building sector. As a new technology to achieve this objective, phase change material\n\t\t\t\t (PCM) panels were ins…
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Colour properties and glazing factors evaluation of multicrystalline based semi-transparent Photovoltaic-vacuum glazing for BIPV application Open
Low heat loss vacuum glazing offers high heat insulation for indoor space, which reduces the building’s heating energy demand. However, the transparent nature of this glazing allows similar daylight to double glazing that creates discomfor…
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Energetic and thermal comfort assessment of phase change material passively incorporated building envelope in severe hot Climate: An experimental study Open
Phase change materials (PCMs) can beneficially work as a successful thermal energy storage medium in different applications. PCMs have shown a remarkable enhancement in building energy-saving and thermal comfort in hot locations. In this p…
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Impact Analysis of Window-Wall Ratio on Heating and Cooling Energy Consumption of Residential Buildings in Hot Summer and Cold Winter Zone in China Open
In order to assess the optimal window-wall ratio and the proper glazing type in different air conditioning system operation modes of residential buildings for each orientation in three typical cities in hot summer and cold winter zone: Cho…
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Increasing Solar Reflectivity of Building Envelope Materials to Mitigate Urban Heat Islands: State-of-the-Art Review Open
The Urban Heat Island (UHI), a consequence of urban development, leads to elevated temperatures within cities compared to their rural counterparts. This phenomenon results from factors such as urban designs, anthropogenic heat emissions, a…
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A literature review on the improvement strategies of passive design for the roofing system of the modern house in a hot and humid climate region Open
Increase of indoor temperature compared with outdoor temperature is a major concern in modern house design. Occupants suffer from this uncomfortable condition because of overheating indoor temperature. Poor passive design causes heat to be…
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A Comparative Simulation Study of the Thermal Performances of the Building Envelope Wall Materials in the Tropics Open
The building walls which form the major part of the building envelope thermally interact with the changing surrounding environment throughout the day influencing the indoor thermal comfort of the space. This paper aims at assessing in deta…
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Colorful low-emissivity paints for space heating and cooling energy savings Open
Space heating and cooling consume ~13% of global energy every year. The development of advanced materials that promote energy savings in heating and cooling is gaining increasing attention. To thermally isolate the space of concern and min…
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Thermal Performance of Ventilated Double Skin Façades with Venetian Blinds Open
Venetian blinds (VB) are shading devices of widespread use in residential and corporate buildings. They can reflect or transmit light into buildings and at the same time allow daylighting and exterior views. They can also efficiently block…
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Assessing heat transfer characteristics of building envelope deployed BIPV and resultant building energy consumption in a tropical climate Open
Building-Integrated Photovoltaic (BIPV) is a viable technology towards increasing renewable energy production and achieving low carbon footprints for buildings. Mauritius, with a daily average of 5.6 kWh/m2 of solar radiation over 2350 h a…
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Investigations of 6-pane glazing: Properties and possibilities Open
Today there is increasing interest and demand for energy savings in the building sector. Windows still represent a weak point in the building envelope with respect to thermal performance due to thermal losses from the interior to the exter…
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Evaluation of adaptive facades: The case study of Al Bahr Towers in the UAE Open
The assessment of adaptive facades presents a barrier as there is no established assessment technique. Many of the available facade performance evaluation systems or frameworks have limited applicability for such advanced building facades.…
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The Optimum Window-to-Wall Ratio in Office Buildings for Hot‒Humid, Hot‒Dry, and Cold Climates in Iran Open
About half of the energy loss in buildings is wasted through windows. Determining the optimum window-to-wall ratio (WWR) for different building facades would reduce such energy losses. The optimum WWR is the window area that minimizes the …
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Effect of Shading on the Performance of Solar PV Panel Open
Solar panels are gaining importance as a major alternate source of energy in the prevailing condition of depleting non renewable energy sources. Photovoltaic (PV) modules are being increasingly used in large as well as small scale installa…
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Office building cooling load reduction using thermal analysis method – A case study Open
Buildings worldwide consume approximately 45% of primary energy sources, making it the single largest energy consumption sector. The importance of improving a building's energy performance was emphasized by the government with the enforcem…
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Effect of Phase Change Materials (PCMs) Integrated into a Concrete Block on Heat Gain Prevention in a Hot Climate Open
In the current study, a phase change material (PCM) contained in an insulated concrete block is tested in extremely hot weather in the United Arab Emirates (UAE) to evaluate its cooling performance. An insulated chamber is constructed behi…
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Periodic modeling of semi-transparent photovoltaic thermal-trombe wall (SPVT-TW) Open
In this paper, a periodic modeling of semitransparent photovoltaic thermal Trombe wall (SPVT-TW) for thermal heating of a single room for winter season in New Delhi has been developed. In the proposed concept, there are direct (through non…
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Performance Analysis of Photovoltaic Integrated Shading Devices (PVSDs) and Semi-Transparent Photovoltaic (STPV) Devices Retrofitted to a Prototype Office Building in a Hot Desert Climate Open
This paper presents the impact on energy performance and visual comfort of retrofitting photovoltaic integrated shading devices (PVSDs) to the façade of a prototype office building in a hot desert climate. EnergyPlus™ and the DIVA-for-Rhin…
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Investigation into energy performance of a school building in a hot climate: Optimum of window-to-wall ratio Open
Global attention is currently focussed on developing techniques to improve the thermal performance of buildings to provide indoor comfort with minimum reliance on energy load. Several studies have investigated building facade, materials us…
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Parametric Optimization of Window-to-Wall Ratio for Passive Buildings Adopting A Scripting Methodology to Dynamic-Energy Simulation Open
Counterbalancing climate change is one of the biggest challenges for engineers around the world. One of the areas in which optimization techniques can be used to reduce energy needs, and with that the pollution derived from its production,…