Babol Noshirvani University of TechnologyIranian (Iranica) Journal of Energy & Environment2079-211514120230101Investigating DesignBuilder Simulation Software's Validation in Term of Heat Gain through Field Measured Data of Adjacent Rooms of Courtyard House1815630510.5829/ijee.2023.14.01.01ENN.TayariDepartment of Architecture, Bam Branch, Islamic Azad University, Bam, IranM.NikpourDepartment of Architecture, Bam Branch, Islamic Azad University, Bam, IranJournal Article20220807New designing techniques have been used recently in design phases of buildings to adapt human thermal comfort. Due to wide range of energy consumption within a building, it is impossible to make a proper decision about the impact of different energy efficiency strategies without simulation tools. Architects need to understand the accuracy and precision of simulation software to use them as valuable tools to predict energy consumption. This research aims to investigate the validity of DesignBuilder simulation software by using the actual traditional house in terms of heat gain. In this study, the comparative method was used to determine the differences in heat gain in a traditional courtyard house in Kerman that was simulated using DesignBuilder software and measured experimentally. This study also reveals that the difference between simulation results and empirical measurement is not more than 10%. It can be concluded that DesignBuilder has enough validity to calculate the amount of heat gain in the rooms adjacent to courtyards.https://www.ijee.net/article_156305_92d572c96f5f3e09200769b4ddca8870.pdfBabol Noshirvani University of TechnologyIranian (Iranica) Journal of Energy & Environment2079-211514120230101Theoretical Study of Global Solar Radiation on Horizontal Area for Determination of Direct and Diffuse Solar Radiation91615300210.5829/ijee.2023.14.01.02ENF.ChabaneDepartment of Mechanical Engineering, Faculty of Technology, University of Biskra 07000, AlgeriaLaboratoire de Génie Mécanique (LGM), Faculty of Technology, University of Biskra 07000, AlgeriaN.MoummiDepartment of Mechanical Engineering, Faculty of Technology, University of Biskra 07000, AlgeriaLaboratoire de Génie Mécanique (LGM), Faculty of Technology, University of Biskra 07000, AlgeriaC.ToumiDepartment of Mechanical Engineering, Faculty of Technology, University of Biskra 07000, AlgeriaLaboratoire de Génie Mécanique (LGM), Faculty of Technology, University of Biskra 07000, AlgeriaS.BoultifDepartment of Mechanical Engineering, Faculty of Technology, University of Biskra 07000, AlgeriaLaboratoire de Génie Mécanique (LGM), Faculty of Technology, University of Biskra 07000, AlgeriaA.HeciniDepartment of Mechanical Engineering, Faculty of Technology, University of Biskra 07000, AlgeriaLaboratoire de Génie Mécanique (LGM), Faculty of Technology, University of Biskra 07000, AlgeriaJournal Article20220506This study aimed to compare global solar radiation on the horizontal area between two models of Chabane Foued and M.Capderou. The model of Chabane has been interested in pollution factors such as TL (turbidity), BE (Angstraon), and the chemical components of the air such as WV, O<sub>3</sub>, CH<sub>4</sub>, CO, CO<sub>2</sub>, and the especial part the new pollution factor such as h<sub>beam</sub>, k<sub>beam</sub>, and k<sub>diffuse</sub>, which all influenced onto solar radiation, and the model of Capderou has been used the atmospheric disturbance to calculate the direct and diffuse components of radiation received on a plane, while the constituents of the atmosphere (absorption and diffusion) can be expressed by disturbance factors, which is very necessary to determine irradiation In the clear sky. The results reveal a significant difference between the two models with approximated curves. The difference between the models probably returns to the nature of the geographic site which the authors used and injected into the models.https://www.ijee.net/article_153002_267a31bff0aad02e7c32a27a0134163a.pdfBabol Noshirvani University of TechnologyIranian (Iranica) Journal of Energy & Environment2079-211514120230101Thermal Performance and Heat Dynamics Energy and Exergy of Integrated Asphalt Collector Storage: Sources of Thermal Energy, and Thermoelectric Energy172515541010.5829/ijee.2023.14.01.03ENM.Esmaeili ShayanDepartment of Biosystem Engineering, Tarbiat Modares University, Tehran, IranSaba Power and Energy Group, Tehran, Iran0000-0002-2977-4099M. R.HayatiSaba Power and Energy Group, Tehran, IranJournal Article20220805Having kilometers of asphalt road, yet with this heat going to waste, an attempt has been made in this research to extract the road's renewable energy heat. The purpose of the experiment is to compare the energy and exergy efficiency of various materials of asphalt solar water heaters (ASWH), as well as heat transmission through the water tube and how friction affects exergy destruction. The water flow rate of one ASWH was 0.01 kg/s, while that of the other was 0.02 kg/s. Each ASWH has an area of 0.5 square meters. The copper tube is buried 10 mm deep in the asphalt. 15 degrees is the angle of inclination. The results indicate that the energy and exergy efficiencies are reasonably high for the water flow rate of 0.02 kg/s. Depending on the water flow rate, asphalt temperature, and sunlight intensity, the energy and exergy efficiencies changed from 32% to 65% and 5.8% to 16%, respectively. The water flow rate is an essential parameter for estimating the internal convective heat transfer coefficient and Reynolds number in order to calculate the friction factor in the copper tube based on internal convection heat transfer. In contrast, the friction factor is a consequence of the pressure loss and exergy degradation induced by friction.https://www.ijee.net/article_155410_bf923f603eb4bccdf63ccebc540714b4.pdfBabol Noshirvani University of TechnologyIranian (Iranica) Journal of Energy & Environment2079-211514120230101Experimental Study to Investigate Effect of Pitch Ratio and Number of Blades on Hydrodynamic Performance of Surface Piercing Propellers263715408310.5829/ijee.2023.14.01.04ENA.YousefiSea-Based Energy Research Group, Babol Noshirvani University of Technology, Babol, IranR.ShafaghatSea-Based Energy Research Group, Babol Noshirvani University of Technology, Babol, Iran0000-0003-4827-5727M.BeykaniSea-Based Energy Research Group, Babol Noshirvani University of Technology, Babol, IranA.Aghajani AfghanSea-Based Energy Research Group, Babol Noshirvani University of Technology, Babol, IranS. T.Seyyed MostafaSea-Based Energy Research Group, Babol Noshirvani University of Technology, Babol, IranJournal Article20220607Surface piercing propellers are special supercavitation propellers operating at free surface. These propellers are designed to have the best performance at the highest speed. The geometric parameters of the number of blades and the pitch ratio will significantly impact the critical advance coefficient range, ventilation and consequently the hydrodynamic performance of the propeller. Therefore, in this paper, the effect of two crucial parameters of pitch ratio and number of blades were experimentally studied in free surface water tunnel. After calibration and evaluation of uncertainty, two 5-bladed propellers with same section profile and pitch ratio of 1.5 and 1.4 used to investigate effect of pitch ratio. The results of two 5-blade and 6-blade propellers with same section profile and pitch ratio of 1.4 were compared. The immersion ratio was 40%, and the shaft inclination angle was zero. Results showed that increasing the pitch ratio increased the thrust and torque coefficients by 30%; while increasing the critical advance coefficient. Consequently that has led to the development of a full ventilation range and improved hydrodynamic performance of the propeller. In addition, by increasing the number of blades, at values greater than the critical advance coefficient, the thrust and torque coefficients were increased by 10%. However, the critical advanced coefficient changes were negligible. Comparing the results in the three-dimensional contours showed that with the change in the number of blades, by increasing the pitch ratio, the critical advance coefficient increased; which led to a further increase in efficiency.https://www.ijee.net/article_154083_3d736eef19e3f14472374cd8a71bc43d.pdf