Browsing by Author "Anvari-Moghaddam, Amjad"

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Citation - WoS: 7
Citation - Scopus: 7
Advanced Exergy Analysis of Waste-Based District Heating Options through Case Studies
(MDPI, 2021) Huseyin Gunhan Ozcan; Arif Hepbasli; Aysegul Abusoglu; Amjad Anvari-Moghaddam; Ozcan, Huseyin Gunhan; Anvari‐moghaddam, Amjad; Anvari-Moghaddam, Amjad; Abusoglu, Aysegul; Hepbasli, Arif
The heating of the buildings together with domestic hot water generation is responsible for half of the total generated heating energy which consumes half of the final energy demand. Meanwhile district heating systems are a powerful option to meet this demand with their significant potential and the experience accumulated over many years. The work described here deals with the conventional and advanced exergy performance assessments of the district heating system using four different waste heat sources by the exhaust gas potentials of the selected plants (municipal solid waste cogeneration thermal power wastewater treatment and cement production) with the real-time data group based on numerical investigations. The simulated results based on conventional exergy analysis revealed that the priority should be given to heat exchanger (HE)-I with exergy efficiency values from 0.39 to 0.58 followed by HE-II and the pump with those from 0.48 to 0.78 and from 0.81 to 0.82 respectively. On the other hand the simulated results based on advanced exergy analysis indicated that the exergy destruction was mostly avoidable for the pump (78.32-78.56%) and mostly unavoidable for the heat exchangers (66.61-97.13%). Meanwhile the exergy destruction was determined to be mainly originated from the component itself (endogenous) for the pump (97.50-99.45%) and heat exchangers (69.80-91.97%). When the real-time implementation was considered the functional exergy efficiency of the entire system was obtained to be linearly and inversely proportional to the pipeline length and the average ambient temperature respectively.
Citation - WoS: 12
Citation - Scopus: 15
Energy exergy economic environmental and sustainability (4ES) analyses of a wastewater source heat pump system for district heating applications based on real operational data
(Elsevier Ltd, 2023) Huseyin Gunhan Ozcan; A. Hepbasli; Aysegul Abusoglu; Amjad Anvari-Moghaddam; Ozcan, Huseyin Gunhan; Anvari-Moghaddam, Amjad; Abusoglu, Aysegul; Hepbasli, Arif
In recent years worldwide interest in utilizing the heat energy from wastewater (WW) has increased significantly concurrently with establishing policies and strategies for the sustainable management of WW. This study evaluated the 4ES performance of a photovoltaic-thermal powered WW source heat pump system for district heating applications with a series of Engineering Equation Solver (EES) simulations based on 20 different cases using actual data. The results indicated that the WW might have an energy rate potential of up to 25470 kW and an exergy rate potential of up to 2263 kW in January in a Koppen-Geiger-classified Dfb (warm-summer humid continental) climate. The highest and lowest exergy efficiency values ranged from 2.85 % to 98.24 % and from 74.80 % to 94.54 % respectively for the employed components and the entire system. The environmental and sustainability studies utilized these simulated results to derive environmental effect factor (EEF) and exergy based-sustainability index (ExSI) values in the ranges of 0.58x10-5 to 4.95x10-5 and 3.97 to 18.32 respectively. In addition the levelized cost of energy (LCOE) was modeled to be between 0.0801 ¢/kWh and 0.1341 ¢/kWh. In terms of sustainability the proposed system demonstrated superior performance than the most common heating solution on the market (i.e. natural gas-fired heating system). © 2023 Elsevier B.V. All rights reserved.