Opportunities of waste heat recovery from various sources: Review of technologies and implementation

Ononogbo, C.; Nwosu, E.C.; Nwakuba, N. R.; Nwaji, Godswill N.; Nwufo, O. C.; Chukwuezie, O.C.; Chukwu, M.M.; Anyanwu, E.E.

doi:10.1016/j.heliyon.2023.e13590

Cited by 36 publications

(7 citation statements)

References 92 publications

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“… Sizing and Configuration: The exchanger that transfers heat must be properly sized to transport heat at the necessary rates. Engineers determine the necessary heat transfer area while taking into account variables such as flow rates, heat exchanger types, and temperature differences between the fluids [11]. The design of the heat exchanger, including how the tubes, flexible fins, and flow routes are arranged, is also adjusted for effective heat exchange.…”

Section:  Design and Selectionmentioning

confidence: 99%

Advancements in heat exchanger design for waste heat recovery in industrial processes

Anand Kishorbhai Patel

2023

World J. Adv. Res. Rev.

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Section:  Design and Selectionmentioning

confidence: 99%

Advancements in heat exchanger design for waste heat recovery in industrial processes

Anand Kishorbhai Patel

2023

World J. Adv. Res. Rev.

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“…Global energy consumption is powered by multiple sources. Oil powers the majority of global energy consumption, accounting for approximately 33%, followed by coal (27%) and natural gas (24%) [2]. Nevertheless, substantial waste and underutilization of energy are still common in the industrial, transportation, and residential sectors [3].…”

Section: Introductionmentioning

confidence: 99%

Advanced Exergy and Exergoeconomic Analysis of Cascade High-Temperature Heat Pump System for Recovery of Low-Temperature Waste Heat

Hu,

Shi,

Liu

et al. 2024

Energies

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Cascade high-temperature heat pumps (CHTHPs) are often applied to recover low-temperature industrial waste heat owing to their large temperature lift. Through a comprehensive consideration of thermodynamic and economic performance, conventional and advanced exergy and exergoeconomic analyses are employed in this study to evaluate the potential for the improvement in CHTHP systems. The results show that the avoidable endogenous exergy destruction in a CHTHP system accounts for 62.26% of its total exergy destruction, indicating that most of the exergy destruction comes from the components. This suggests that CHTHP systems still have significant potential for improvement. The very low exergoeconomic factor of the total system (only 0.75%) implies that the exergy destruction cost has a great influence on the economic performance of a CHTHP system. The high- and low-temperature compressors are the two components with the highest exergy destruction, accounting for 34.14% and 26.79% of the total exergy destruction in the system, respectively. Moreover, their exergy destruction cost is much larger than that of the other components. Thus, the priorities for improvement should be the high- and low-temperature compressors. The decrease in exergy destruction in compressors produces a reduction in carbon emissions. This comprehensive analysis of thermodynamic and economic performance supplies guidance for the engineering application of CHTHPs in low-temperature waste heat recovery.

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“…There are several scenarios for recovering waste energy such as WH-to-power, WHto-storage, WH-to-upgrade, and WH-to-cooling [10]. Each scenario has a contribution to achieve energy and cost-efficient zero WH on board, taking into account the end-users' needs and the particular technical characteristics of the ship types.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis and Economic Assessment of Organic Rankine Cycle Integrated with Thermoelectric Generator Onboard Container Ship

Elkafas

2024

Processes

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In July 2023, the International Maritime Organization (IMO) presented an updated strategy for decarbonizing maritime transport and achieving net-zero greenhouse gas emissions by 2050. It is therefore imperative to explore innovative solutions to achieve a blue economy and maximize energy efficiency on-board ships. For this reason, the current study aims to integrate the organic Rankine cycle (ORC) and thermoelectric generator (TEG) on board a container ship to generate electrical energy and reduce fuel consumption. The combined system will benefit from the waste heat of a marine diesel engine installed on board. The current study uses R245fa as the organic liquid and analyzes the effects of varying the evaporation pressure on the energetic and economic performance indicators by modeling the combined system in Engineering Equation Solver (EES) software. The results show that the energy efficiency of the ORC system increases from 12.3% at 3.5 bar to 17.3% at 8 bar. In comparison, the energy efficiency of the TEG unit is 6.9% at different evaporation pressures. In addition, the energy efficiency of the TEG-ORC system is 18.3% with an output of 1386 kW at 8 bar, which is an increase of 30.5% compared to the value at 3.5 bar. This generated power reduces fuel consumption by around 1580 ton/year. From an economic point of view, the energy production cost of the combined system is USD 618/kWh and USD 614/kWh at the lowest and maximum evaporation pressure, respectively. Fuel costs and CO2 tax expenditures could be reduced by up to USD 1.169 million/year and USD 0.47 million/year, respectively, through the combined TEG-ORC system.

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Opportunities of waste heat recovery from various sources: Review of technologies and implementation

Cited by 36 publications

References 92 publications

Advancements in heat exchanger design for waste heat recovery in industrial processes

Advancements in heat exchanger design for waste heat recovery in industrial processes

Advanced Exergy and Exergoeconomic Analysis of Cascade High-Temperature Heat Pump System for Recovery of Low-Temperature Waste Heat

Thermodynamic Analysis and Economic Assessment of Organic Rankine Cycle Integrated with Thermoelectric Generator Onboard Container Ship

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