Showing 3 results for High-Rise Buildings
Saber Sabouri, Niloufar Alinasab,
Volume 31, Issue 4 (10-2021)
Abstract
Nowadays, due to rapid urbanization, People can’t participate in outdoor activities. On the other hand, environmental issues such as climate change and heat stress have caused thermal dissatisfaction for users. In this regard, studying outdoor environments becomes crucial. In the present historical context, lack of responsive urban layout consequences not only morphological problems but also causes thermal dissatisfaction during the passages. The present study aims to find the responsive layout pattern for providing an approximate outdoor thermal comfort based on local criteria and limitations in summer and winter; which requires the minimum intervention in the current context. In this regard, we intend to represent three basic street patterns (Linear, Grid, and Circular) as alternative designs and attempt to localize them with the current urban layout. For analyzing the prototypes, we used Envi-met Beta software to compare the average amount of climatic factors, orientation, and H/W ratio for the alternatives. In addition, the PMV factor (=Predicted Mean Vote Model) was used as a measurement index of outdoor thermal comfort. According to the outcomes, the Radial pattern with dominant NE-SW oriented passages prepares adequate solar energy in the winter. Also, it could balance the high radiation during the summer, whereby provides optimal thermal satisfaction in both hot and cold seasons.
Iman Mirshojaeian Hosseini, Fatemeh Mehdizadeh, Seyyed Mehdi Maddahi, Vahid Ghobadian,
Volume 31, Issue 4 (10-2021)
Abstract
Energy-efficient buildings reduce energy demand. The parameters of the building envelope, as an interface between the interior of the building and the outdoor environment, can greatly influence energy consumption. The main objective of this study is to optimize the parameters of buildings’ envelopes for reducing energy consumption while considering the common style of architectural design in cold-dry regions. The case study research methodology is used to investigate the effect of various openings characteristics on the energy performance of the building. This paper studied one of the stories of a high-rise residential building as the case study and component blocks were used for the rest of the stories. To find an energy-efficient model for the buildings’ façade, considering the effective parameters, numerous simulations were performed by the EnergyPlus as an energy simulation engine. The factors analyzed in this article included the type of glazing, the type of window frame, the window-to-wall ratio (WWR), and shading placement. The results show that a combination of Low-E glazing and Argon gas with a 5.98% reduction, a UPVC window frame with a 0.36% reduction, a WWR of 30% with a 1.57% increase, an overhang shading with 20cm thickness and 15cm depth with a 1.12% reduction in annual energy consumption can cause a total reduction of 2.45% in annual energy consumption compared to the initial model. These changes did not compromise the required lighting for the interior spaces while reducing the energy consumption of the building.
Amirhossein Zolfagharpour, Minoo Shafaei, Parisa Saeidi,
Volume 32, Issue 3 (7-2022)
Abstract
Today constructing high-rise buildings which consist of a great amount of surface area and also openings is prevalent and is continuing to rise. Therefore, the building’s envelope is among the most important elements that has a great effect on energy consumption and wastage. As a result, Responsive Architecture focuses on the design of the external skin of buildings which can change their physical properties in order to respond to various environmental conditions. These facades can play a significant role in reducing energy consumption produced by fossil fuels and maximizing the use of natural energies. This study aims to simply review and categorize the various solutions provided by responsive architecture in order to reduce energy consumption in contemporary high-rise building skins. To achieve this goal there has to be a clear image presented of the impact of these responsive systems on energy consumption and how they actually function. In this regard, comparative studies on some of the most basic studies concentrated on the subject, and also a few case studies well-known in this area of matter were precisely reviewed with a descriptive-analytical approach. Accordingly, a general assortment of responsive architecture solutions and performance in high-rises were attained and gathered which can be classified into two groups; those applicable for vertical facades including “Kinetic Facades”, “Double-Skin Facades”, “Smart Materials and Windows”, and those for horizontal facades including “Kinetic Roof” and a new type of “Ventilation Stacks and Exhaust Ducts”. These solutions can be operated in combination with each other or for the better performance of another system, depending on environmental conditions. moreover, they can be applied for either new buildings during their construction or even the old ones by installing them separately from the main facade. They can control the energy consumption of the building and minimize the use of mechanical systems by increasing the amount of received solar energy, reducing internal energy wastage, receiving optimum natural daylight, creating natural ventilation, controlling the amount of excess received heat, regulating temperature through energy storage and generating electricity. Responsive architecture solutions show that they can not only make it possible in getting the maximum advantage of renewable sources, but can also extend the useful life of buildings, and produce a quality of experience that reconnects people to the environment and provides delight in their lives.
