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Volume 9, Issue 36 (7-2021)                   Haft Hesar J Environ Stud 2021, 9(36): 5-18 | Back to browse issues page

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Abdolkhaleghi P, Sabernejad Z, Fayaz R. Optimal framework of sunspace based on energy performance in residential buildings in cold climate of Iran (Case study: Sanandaj City). Haft Hesar J Environ Stud 2021; 9 (36) :5-18
URL: http://hafthesar.iauh.ac.ir/article-1-1382-en.html
Abstract:   (1318 Views)
Introduction: Increasing energy consumption in buildings has resulted in environmental issues and has led many researchers to explore ways to reduce fossil fuel consumption. One of the most cost-effective and logical ways to use energy resources in residential buildings is to use passive solar systems such as sunspaces.
Methodology: In this paper, the effects of sunspaces on energy gain and reducing energy consumption are presented. The energy performance of the sunspace was calculated using parametric modeling in Grasshopper software and Rhino software, and energy simulation was carried out using Energyplus. Simulations were performed according to the meteorological data of Sanandaj.
 Different models of sunspace with different dimensions and orientations in Sanandaj have been studied to achieve simulation goals. Modifications of the models included different proportions of sunspace dimensions, orientations, the use of different thermal insulations.
Results: The orientation towards the south receives the highest energy, and with 20 degrees rotation to the west or east, the highest amount of energy can be gained. Examination of sunspace models with three percentages of window-to-wall ratio: 40%, 50%,60% showed that the 50% WWR is more desirable than other models. The highest increase in energy absorption to help reduce the heating load during the cold season occurs when the sunspace has the longest length, ie 5 meters. In this case, the southward is increased, and the desired depth is 1 meter, while by reducing or increasing this amount, solar energy gain is reduced. Also, to improve the performance of the sunspace, the use of conventional thermal insulation has been investigated. Polyurethane with a thickness of 10 cm has the lowest efficiency in reducing energy consumption in the sunspace, while other insulating materials with similar thicknesses are effective.
Conclusion: In this paper, the effect of various parameters on increasing solar energy and reducing its loss is identified. The simulation of parameters using Grace Hopper software used in this research indicates that the proper design of the parameters related to the solar greenhouse system strengthens the efficiency of the greenhouse and has a direct and positive effect on increasing solar energy. And its loss indicates the positive efficiency of this system in receiving and absorbing solar energy. It can be used as a design framework for solar greenhouses in the city to strengthen the use of solar energy and reduce fossil fuel consumption to reduce the heating load in cold seasons. Also, the algorithm used and the optimization process b in this research show that if the solar greenhouses are modified in different types, it can reduce the heat load in the building by absorbing solar energy. Architectural design with an energy approach is a complex process that requires a combination of different parameters to optimize optimization. Using energy simulation and optimization can help designers do the design more comprehensively by providing valuable tools.
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Type of Study: Research | Subject: General
Received: 2021/08/20 | Accepted: 2021/07/1 | Published: 2021/07/1

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