Energy performance sensitivity analysis on building's passive technologies effective parameters, in an NZEB EnergyPlus-simulated villa in Tehran's weather conditions with OFAT methods

Document Type : Research Paper


1 School of Mechanical Engineering University of Tehran, Tehran, Iran

2 School of Mechanical Engineering, College of Engineering, University of Tehran



As it is clear, today's important subject is energy and ways to decrease its consumption. This subject gets more critical in countries with difficulty providing energy for their building consumption, which is responsible for about 30% of annual energy consumption in the whole country. Iran, because of its geographical location, confronts these problems. Passive technologies are essential in NZEB buildings to reduce annual energy consumption. In this research effects of using three significant passive technologies: Roof Vegetation, smart blinders, and Thermochromic windows, are studied separately in EnergyPlus software. The result of this research is that using smart blinders and Thermochromic windows at their optimum condition can reduce the annual energy consumption of a building in the climatic circumstances of Tehran by about 56.51% and 37.94%, respectively.


Main Subjects

[1] C. Ding, W. Feng, X. Li, and N. Zhou, "Urban-scale building energy consumption database: A case study for Wuhan, China," Energy Procedia, vol. 158, pp. 6551–6556, 2019, doi: 10.1016/j.egypro.2019.01.102.
[2] H. Feng and K. Hewage, "Energy saving performance of green vegetation on LEED certified buildings," Energy and Buildings, vol. 75, pp. 281–289, 2014, doi: 10.1016/j.enbuild.2013.10.039.
[3] S. E. Ouldboukhitine, R. Belarbi, and D. J. Sailor, "Experimental and numerical investigation of urban street canyons to evaluate the impact of green roof inside and outside buildings," Applied Energy, vol. 114, pp. 273–282, 2014, doi: 10.1016/j.apenergy.2013.09.073.
[4] S. Vera et al., "Analysis and comparison of two vegetative roof heat and mass transfer models in three different climates," Energy and Buildings, vol. 202, 2019, doi: 10.1016/j.enbuild.2019.109367.
[5] M. Mungur et al., "A numerical and experimental investigation of the effectiveness of green roofs in tropical environments: The case study of Mauritius in mid and late winter," Energy, vol. 202, p. 117608, 2020, doi: 10.1016/
[6] A. Khabaz, "Construction and design requirements of green buildings' roofs in Saudi Arabia depending on thermal conductivity principle," Construction and Building Materials, vol. 186, pp. 1119–1131, 2018, doi: 10.1016/j.conbuildmat.2018.07.234.
[7] P. Bevilacqua, R. Bruno, and N. Arcuri, "Green roofs in a Mediterranean climate: energy performances based on in-situ experimental data," Renewable Energy, vol. 152, pp. 1414–1430, 2020, doi: 10.1016/j.renene.2020.01.085.
 [8]       S. Cascone, F. Catania, A. Gagliano, and G. Sciuto, "A comprehensive study on green roof performance for retrofitting existing buildings," Building and Environment, vol. 136, no. March, pp. 227–239, 2018, doi: 10.1016/j.buildenv.2018.03.052.
[9] A. Ávila-Hernández, E. Simá, J. Xamán, I. Hernández-Pérez, E. Téllez-Velázquez, and M. A. Chagolla-Aranda, "Test box experiment and simulations of a green-roof: Thermal and energy performance of a residential building standard for Mexico," Energy and Buildings, vol. 209, 2020, doi: 10.1016/j.enbuild.2019.109709.
[10] S. Algarni, K. Almutairi, and T. Alqahtani, “Investigating the performance of energy management in office buildings by using a suitable green roof design to reduce the building’s energy consumption,” Sustainable Energy Technologies and Assessments, vol. 54, p. 102825, Dec. 2022, doi:
[11] A. Al Touma and D. Ouahrani, "Shading and day-lighting controls energy savings in offices with fully-Glazed façades in hot climates," Energy and Buildings, vol. 151, pp. 263–274, 2017, doi: 10.1016/j.enbuild.2017.06.058.
[12] D. Kim, S. J. Cox, H. Cho, and J. Yoon, "Comparative investigation on building energy performance of double skin façade (DSF) with interior or exterior slat blinds," Journal of Building Engineering, vol. 20, no. January, pp. 411–423, 2018, doi: 10.1016/j.jobe.2018.08.012.
[13] E. Naderi, B. Sajadi, M. A. Behabadi, and E. Naderi, "Multi-objective simulation-based optimization of controlled blind specifications to reduce energy consumption, and thermal and visual discomfort: Case studies in Iran," Building and Environment, vol. 169, p. 106570, 2020, doi: 10.1016/j.buildenv.2019.106570.
[14] W. Lu, “Dynamic Shading and Glazing Technologies: Improve Energy, Visual, and Thermal Performance,” Energy and Built Environment, Sep. 2022, doi:
[15] S.-W. Ryu and D.-Y. Park, “Effect of blind angles on thermal decay in the UFAD system in summer,” Applied Thermal Engineering, vol. 215, p. 118927, Oct. 2022, doi:
[16] G. Kokogiannakis, J. Darkwa, and C. Aloisio, "Simulating thermochromic and heat mirror glazing systems in hot and cold climates," Energy Procedia, vol. 62, pp. 22–31, 2014, doi: 10.1016/j.egypro.2014.12.363.
[17] R. Liang, Y. Sun, M. Aburas, R. Wilson, and Y. Wu, "Evaluation of the thermal and optical performance of thermochromic windows for office buildings in China," Energy and Buildings, vol. 176, pp. 216–231, 2018, doi: 10.1016/j.enbuild.2018.07.009.
[18] R. Liang, Y. Sun, M. Aburas, R. Wilson, and Y. Wu, "An exploration of the combined effects of NIR and VIS spectrally selective thermochromic materials on building performance," Energy and Buildings, vol. 201, pp. 149–162, 2019, doi: 10.1016/j.enbuild.2019.05.061.
[19] L. Giovannini, F. Favoino, A. Pellegrino, V. R. M. Lo Verso, V. Serra, and M. Zinzi, "Thermochromic glazing performance: From component experimental characterisation to whole building performance evaluation," Applied Energy, vol. 251, no. May, p. 113335, 2019, doi: 10.1016/j.apenergy.2019.113335.
[20] M. Aburas, V. Soebarto, T. Williamson, R. Liang, H. Ebendorff-Heidepriem, and Y. Wu, "Thermochromic smart window technologies for building application: A review," Applied Energy, vol. 255, no. July, p. 113522, 2019, doi: 10.1016/j.apenergy.2019.113522.
[21] M. Salamati, G. Kamyabjou, M. Mohamadi, K. Taghizade, and E. Kowsari, "Preparation of TiO2@W-VO2 thermochromic thin film for the application of energy efficient smart windows and energy modeling studies of the produced glass," Construction and Building Materials, vol. 218, pp. 477–482, 2019, doi: 10.1016/j.conbuildmat.2019.05.046.
[22] J. Hu and X. B. Yu, "Adaptive thermochromic roof system: Assessment of performance under different climates," Energy and Buildings, vol. 192, pp. 1–14, 2019, doi: 10.1016/j.enbuild.2019.02.040.
[23] E. Vuong, R. S. Kamel, and A. S. Fung, "Modelling and simulation of BIPV/T in EnergyPlus and TRNSYS," in Energy Procedia, Nov. 2015, vol. 78, pp. 1883–1888. doi: 10.1016/j.egypro.2015.11.354.
[24] Y. Sun et al., "Integrated CdTe PV glazing into windows: Energy and daylight performance for different window-to-wall ratio," in Energy Procedia, 2019, vol. 158, pp. 3014–3019. doi: 10.1016/j.egypro.2019.01.976.
[25] W. Guo et al., "Energy performance of photovoltaic (PV) windows under typical climates of China in terms of transmittance and orientation," Energy, vol. 213, Dec. 2020, doi: 10.1016/
[26] E. D. Chepp and A. Krenzinger, "A methodology for prediction and assessment of shading on PV systems," Solar Energy, vol. 216, pp. 537–550, Mar. 2021, doi: 10.1016/j.solener.2021.01.002.
[27] M. Sim and D. Suh, "A heuristic solution and multi-objective optimization model for life-cycle cost analysis of solar PV/GSHP system: A case study of campus residential building in Korea," Sustainable Energy Technologies and Assessments, vol. 47, Oct. 2021, doi: 10.1016/j.seta.2021.101490.
[28] S. H. Mun, J. Kang, Y. Kwak, Y. S. Jeong, S. M. Lee, and J. H. Huh, "Limitations of EnergyPlus in analyzing energy performance of semi-transparent photovoltaic modules," Case Studies in Thermal Engineering, vol. 22, Dec. 2020, doi: 10.1016/j.csite.2020.100765.
[29] C. Good, I. Andresen, and A. G. Hestnes, "Solar energy for net zero energy buildings - A comparison between solar thermal, PV and photovoltaic-thermal (PV/T) systems," Solar Energy, vol. 122, pp. 986–996, Dec. 2015, doi: 10.1016/j.solener.2015.10.013.