List of Articles Thermal efficiency Open Access Article Abstract Page Full-Text 1 - Investigation the effect of porosity on the thermohydraulic performance of a solar air collector with perforated obstacles Amin Ghalenoei Majid Sabzpooshani 10.30495/jest.2023.60014.5352 Open Access Article Abstract Page Full-Text 2 - Experimental Study of the Effect of Using Fin on the Fire Tube of Gas Pressure Reduction Station Heater on Thermal Efficiency and and Reducing the Emission of Greenhouse Gas Saeed Rastegar Hadi Kargarsharifabad Nader Rahbar Mohammad Behshad Shafii, 10.22034/jest.2020.51771.5041 Open Access Article Abstract Page Full-Text 3 - Multi-Objective Optimization of Plate Heat Exchangers by Employing an Imperialist Competitive Algorithm Mohammadjavad Mahmoodabadi Soodeh Zarnegar 10.30486/admt.2022.1949157.1332