Multi-objective optimisation for wind resistant air-cooled condenser operation

Marincowitz, F.S.; Owen, Michael; Muiyser, Jacques

doi:10.1016/j.applthermaleng.2022.119382

Cited by 6 publications

(2 citation statements)

References 33 publications

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“…In fact, Butler and Grimes [2] have highlighted that it is necessary to consider the historical local ambient wind conditions in the preliminary design of the condenser layout to reduce the impact of environmental factors. Marincowitz et al carry out a multi-objective optimization to mitigate the effect of wind on the thermal performance of ACCs [3]. Their final set of feasible solutions lies in a compromise between thermal exchange efficiency and blade loading reduction.…”

Section: Introductionmentioning

confidence: 99%

Design of Sinusoidal Leading Edge for Low-Speed Axial Fans Operating under Inflow Distortion

Tieghi,

Delibra,

Van der Spuy

et al. 2024

Energies

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Axial fans may be equipped with passive flow control devices to enhance rotor efficiency or minimize noise emissions. In this regard, blade designs influenced by biomimicry, such as rotors with sinusoidal leading edges (LEs), have gained popularity in recent years. However, their design is predominantly driven by a trial-and-error approach, with limited systematic studies on the influence of rotor performance. Furthermore, their effectiveness is typically evaluated under controlled conditions that may significantly differ from operations in real installation layouts. In this work, a systematic review of the design process for sinusoidal LE axial fan rotors is provided, aiming to summarize previous design experiences. Then, a modified sinusoidal LE is designed and fitted to a 7.3 m low-speed axial fan for air-cooled condensers (ACCs). These fans operate at environmental conditions, providing a quasi-zero static pressure rise, often with inflow non-uniformities. A series of RANS computations were run to simulate the performance of the baseline fan and that of the sinusoidal leading edge, considering a real installation setup at Stellenbosh University, where the ACC is constrained between buildings and has a channel running on the ground below the fan inlet. The aim is to explore the nonbalanced inflow condition effects in both rotor geometries and to test the effect of the installation layout on fan performance. The results show that the modification to the rotor allows for a more even distribution of flow in the blade-to-blade passages with respect to the baseline geometry.

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Section: Introductionmentioning

confidence: 99%

Design of Sinusoidal Leading Edge for Low-Speed Axial Fans Operating under Inflow Distortion

Tieghi,

Delibra,

Van der Spuy

et al. 2024

Energies

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“…Secondly, studies have been conducted on control strategies for air-source heat pump water heaters. Marincowitz et al [15] proposed a fine-grained system operation strategy based on the hourly changes of user-side heat load. When the system operates at the optimal state point, the energy consumption can be reduced by 38.9% without affecting the user's thermal comfort, and the system performance coefficient is also improved by 2.24 times.…”

Section: Introductionmentioning

confidence: 99%

Research on Energy Savings of an Air-Source Heat Pump Hot Water System in a College Student’s Dormitory Building

Zeng

et al. 2023

Sustainability

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Centralized hot water systems are commonly installed in college student dormitories, representing a typical application for such systems. To achieve sustainable and environmentally friendly heating solutions, air-source heat pump hot water systems have gained attention for their high efficiency and energy-saving characteristics. By implementing heat pump technology, China could make significant progress towards achieving its carbon neutrality goals by reducing energy consumption and associated emissions. In this study, the heating performance of an air-source heat pump hot water system was tested in the field over the course of a year at a university in Chongqing, China. A simulation model was constructed using TRNSYS software, and a time-sharing control strategy was proposed to analyze the system’s operating characteristics and energy-saving performance. Results showed a 6% increase in unit annual average Coefficient of Performance (COP) and annual electricity savings of 10,027 kW·h, with an energy-saving rate of 8.77% after time-sharing control. The study highlights the significant economic and environmental benefits of adopting sustainable energy solutions, particularly in the context of increasing global greenhouse gas emissions.

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Performance prediction of gas turbine blade with multi-source random factors using active learning-based neural network

Qiu,

Wang,

et al. 2024

Applied Thermal Engineering

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Multi-objective optimisation for wind resistant air-cooled condenser operation

Cited by 6 publications

References 33 publications

Design of Sinusoidal Leading Edge for Low-Speed Axial Fans Operating under Inflow Distortion

Design of Sinusoidal Leading Edge for Low-Speed Axial Fans Operating under Inflow Distortion

Research on Energy Savings of an Air-Source Heat Pump Hot Water System in a College Student’s Dormitory Building

Performance prediction of gas turbine blade with multi-source random factors using active learning-based neural network

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