Effect of Radiative Filling Gas in Compound Parabolic Solar Energy Collectors

S. A. Gandjalikhan Nassab; M. Moein Addini

Volume 12, Issue 3 , September 2021, Pages 181-191


  In the present paper, the use of radiating gas instead of air inside the cavity of compound parabolic collectors (CPSs) is suggested and verified by numerical analysis. The collector under study has a simple cone shape with flat absorber which is filled with a participating gas such as carbon dioxide ...  Read More

Chemical Treatment in Industrial Wastewater of Polyester Synthetic Fiber Made from Recycled Polyethylene Terephthalate Bottles: Minimize Environmental Impacts

Y. Setiawan; A. Taufik Rizaludin; M. Nur Aini; S. Saepuloh

Volume 12, Issue 3 , September 2021, Pages 192-197


  The Polyester synthetic fiber (PSF) industry has recycled Polyethylene Terephthalate (PET) bottle into raw material and converted them into economically valuable textile materials. This study was aimed to provide an overview of wastewater treatment from PSF industry in minimizing its impact on the environment. ...  Read More

An Overview of the Impact of Lockdown Policies on Electricity Demands during COVID-19

N. Norouzi; M. Fani

Volume 12, Issue 3 , September 2021, Pages 198-203


  As COVID-19 has propagated well-known, governments have taken nationwide moderation to restrain it, from regulations to moves toward off the economization as a whole. Know-how its outcome is imperative to help larger policies for nations that are not but preponderant or in the outcome of a succeeding ...  Read More

Effect of Superplasticizer on Strength and Durability of Rice Husk Ash Concrete

V. N. Kanthe

Volume 12, Issue 3 , September 2021, Pages 204-208


  In this research work, the effect of rice husk ash (RHA) along with and without superplasticizer (SP) on the properties of concrete was investigated. The good workability and compaction is key parameter for strength and durability of concrete, and it may achieved by adding SP in to the concrete.  ...  Read More

The Effect of Mixing Rate on Performance of Anaerobic Reactor in Methane Production

M. E. Kashfi; R. Kouhikamali; G. Khayati

Volume 12, Issue 3 , September 2021, Pages 209-219


  In this study, a mathematical model was used to predict the dynamic behaviour of the system under conditions of imperfect mixing in an Anaerobic Digestion (AD) process. To evaluate the system performance, the effect of mixing parameters by calculating the quantities of methane gas produced, system power, ...  Read More

Utilization of Horizontal Water System as Electrical Power Generation in Pico Scale with a Small Bulb Turbine

A. Nurdin; D. A. Himawanto; S. Hadi

Volume 12, Issue 3 , September 2021, Pages 220-225


  Water systems such as pipelines, pumping stations and other channels in horizontal flow have the potential as pico scale hydropower. This study aims to observe the effect of the number of blades and the blade angle on the electric power generation in the small bulb turbine on horizontal flow. This study ...  Read More

Investigating on Evolution of Windows from Qajar to Pahlavi Era in Tabriz's Ganjei-Zade House with Heat Dissipation Approach

S. Abdoly Naser; F. Haghparast; M. Singery; H. Sattari Sarbangholi

Volume 12, Issue 3 , September 2021, Pages 226-233


  Iranian vernacular architecture has rich experiences in terms of coordinating with its surroundings. although, high energy consumption was one of the major concerns in the past decades. According to statistics presented by Iranian Statistics Center, 40% of the country's energy consumption is relevant ...  Read More

Investigating the Simultaneous Effect of Macro Fly Ash and Oak Bark Ash on Mechanical Properties of Concrete

O. Hadad; O. Soltani; H. Azizian; V. Mam Ghaderi

Volume 12, Issue 3 , September 2021, Pages 234-240


  Due to the increasing use of concrete, researchers and engineers are constantly tried to improve its mechanical and physical properties as well as its efficiency. Hence, they have made use of the most diverse products and the most modern concere technologies. In the present study, oak bark ash and macro ...  Read More

Providing A Model for Predicting and Detecting Destructive Processes to Prevent the Production of Waste and Defective Products: A Data Mining Approach

N. Safaie; M. R. Saadatmand; S. A. Nasri

Volume 12, Issue 3 , September 2021, Pages 241-254


  Today, most industries use statistical quality control tools to improve quality and reduce the defective products and waste, but the high volume of data requires the help of a powerful tool to control processes. One of the objectives of the present study is to predict defective products and prevent their ...  Read More

Energy Efficient Design Optimization of a Building Envelope in a Temperate and Humid Climate

N. Sadafi; N. Jamshidi; M. Zahedian

Volume 12, Issue 3 , September 2021, Pages 255-263


  A building envelope plays a key role in controlling the internal environmental conditions. The evaluation of façade designs for naturally ventilated residential buildings in the temperate and humid climate of Iran was carried out to optimize façade design for energy saving. Firstly, the ...  Read More

Production of Alkaline Protease Using Industrial Waste Effluent as Low-cost Fermentation Substrate

H. Zare; F. Meiguni; G. D. Najafpour

Volume 12, Issue 3 , September 2021, Pages 264-272


  Alkaline proteases are the most important groups of commercial enzymes, which have been broadly used in industrial processes. In this study, Bacillus sp. PTCC 1538 was selected as a biological agent to produce alkaline protease. Enzyme production under submerge fermentation using industrial waste effluent ...  Read More