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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
energy
Unleashing wastewater heat Recovery's potential in smart building systems: Grey wolf-assisted optimization aided by artificial neural networks
Energy, Volume 285, Article 129307, Year 2023
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Description
This article presents an innovative and efficient way to address residential dwellings' substantial heating needs. The primary objective is to utilize the heat from wastewater to enhance energy efficiency through a control framework based on predetermined rules. This framework aims to increase the incoming air temperature at the air handling unit. A thorough evaluation is carried out to analyze all aspects of the proposed system compared to an identical system that does not incorporate the wastewater heat recovery process. The practicality of the concept is assessed for a residential building located in Beijing, China, employing the TRNSYS software. The most optimal operating condition is achieved via the grey wolf optimizer and TOPSIS decision-making approach equipped with the artificial neural network using MATLAB. Then, the proposed system's performance under optimal conditions is compared with similar works in the literature. According to the results, compared to the conventional system, a higher performance efficiency of 6 % and lower levelized cost of heating of 15.6 $/MWh is obtained by implementing the wastewater heat recovery process. The parametric study results also demonstrate a conflicting change in techno-economic and environmental indicators when altering the primary decision variables, highlighting the necessity for multi-criteria optimization. What stands out from the optimization outcomes is that the grey wolf method increases the efficiency and CO2 saving by around 5.2 and 531.2 kg/year while reducing the levelized cost of heating by about 13.6 $/MWh, respectively. The optimization results reveal that this condition is attained by raising the heat exchanger's effectiveness and the number of residences and decreasing the wastewater temperature. According to the scatter distribution of key parameters, the energy wheel effectiveness has low sensitivity, and the optimal points of tank volume are distributed within the range of 3 m3 and 4 m3. © 2023 Elsevier Ltd
Authors & Co-Authors
Hai, Tao
China, Duyun
Qiannan Normal College for Nationalities
China, Nanchang
Nanchang Institute of Science and Technology
Malaysia, Shah Alam
Universiti Teknologi Mara
Zhang, Guangnan
China, Baoji
Baoji University of Arts and Sciences
Kumar Singh, Pradeep
India, Mathura
Gla University, Mathura
Altameem, Torki
Saudi Arabia, Riyadh
King Saud University
El-Shafai, Walid
Egypt, Shibin el Kom
Menoufia University
Statistics
Authors: 5
Affiliations: 7
Identifiers
Doi:
10.1016/j.energy.2023.129307
ISSN:
03605442
Research Areas
Environmental