A comprehensive analysis of a laboratory scale counter flow wet cooling tower using the first and the second laws of thermodynamics

Ghazani, Mehran Akbarpour; Hashem-ol-Hosseini, Alireza; Emami, Mohsen Davazdah

doi:10.1016/j.applthermaleng.2017.07.090

Cited by 43 publications

(2 citation statements)

References 11 publications

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“…Flocculants, mainly polymeric organic compounds, are used to agglomerate the formed particles, and coagulants, mainly inorganic salts of aluminium or iron sulfate, are used to co-precipitate aluminium or iron hydroxides according to reactions (1.11) and (1.12) [23]. The mechanism of action of flocculants and coagulants in lime softening is based on the neutralization of charged particles dispersed in water, with the formation of a precipitate prone to agglomeration and subsequent sedimentation [24,25]. The significance of DIS components on the system performance in ORS is shown in table 1.…”

Section: Introductionmentioning

confidence: 99%

Behaviour of dissolved inorganic salts in the cooling water of a nuclear power plant open recirculation system and formation of water discharge

Biedunkova,

Kuznietsov,

Gandziura

2024

R. Soc. Open Sci.

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The main problem in the operation of nuclear power plants (NPPs) is the scale formation of mineral impurities in an open recirculating system (ORS). The discharge of water from an ORS into natural water bodies can alter the chemical equilibrium of wastewater components, necessitating continuous monitoring. The purpose of this study was to analyse the behaviour of dissolved inorganic salts (DIS) in water within an ORS during water treatment, using the Rivne Nuclear Power Plant (RNPP) as a case study. Moreover, the analysis impact of their discharge with return water in the Styr River. The DIS concentration has a significant impact on the efficiency of the system and the environmental of an ORS power plant. Altogether, each of the DIS components was analysed separately using the standard measurement methods, statistical methods of data processing and correlation analysis. In addition, the annual discharge of the DIS components was calculated, and the amount of discharge was assessed for compliance with the maximum discharge limit. Thus, the impact of the formation of DIS and the variations in their concentration levels upon the discharge of wastewater into a natural water body were examined.

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Section: Introductionmentioning

confidence: 99%

Behaviour of dissolved inorganic salts in the cooling water of a nuclear power plant open recirculation system and formation of water discharge

Biedunkova,

Kuznietsov,

Gandziura

2024

R. Soc. Open Sci.

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“…(2019) conducted an LCA of industrial cooling towers considering all life cycle stages with the FU “cooling of 1 kg water from 35°C to 28°C in Germany for the overall usage time,” meaning the entire life cycle (Schulze et al., 2019, p. 140). Furthermore, several studies evaluated cooling towers using exergy analysis (Ghazani et al., 2017; Farmahini‐Farahani et al., 2012; Muangnoi et al., 2007; Peng et al., 2017; Singh & Das, 2017). In general, exergy input, the exergy of the useful product, and exergy loss are distinguished, leading to the exergy efficiency as the ratio of exergy of the useful product and exergy input.…”

Section: Introductionmentioning

confidence: 99%

Extending effectiveness to efficiency: Comparing energy and environmental assessment methods for a wet cooling tower

Wenzel

Radgen

2023

J of Industrial Ecology

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Improving the environmental performance and energy efficiency of cooling towers requires systematic evaluation. However, methodological challenges emerge when applying typical environmental assessment methods to cooling towers. Hence, this paper compares the methods, analyzes their strengths and weaknesses, and proposes adaptions for evaluating cooling towers. As a case study, we applied five methods for assessing the wet cooling system of the high‐performance data center in Stuttgart. These are material flow analysis (MFA), life cycle inventory, life cycle assessment (LCA), exergy analysis, and life cycle exergy analysis (LCEA). The comparison highlights that the LCA provides the most comprehensive environmental evaluation of cooling systems by considering several environmental impact dimensions. In the case of the wet cooling tower, however, electricity and water consumption cause more than 97% of the environmental impacts in all considered impact categories. Therefore, MFA containing energy flows suffices in many cases. Using exergy efficiency is controversially debated because exergy destruction is part of the technical principle applied in cooling towers and, therefore, difficult to interpret. The LCEA appears inappropriate because construction and disposal barely affect the exergy balance and are associated with transiting exergy. The method comparison demonstrates the need for further methodological development, such as dynamic extensions or the efficiency definition of cooling towers. The paper highlights that the methodological needs depend on the specific application.

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Data‐Driven and Physics‐Based Reduced‐Order Modeling and Optimization of Cooling Tower Systems

He,

2024

Applied AI Techniques in the Process Industry

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A comprehensive analysis of a laboratory scale counter flow wet cooling tower using the first and the second laws of thermodynamics

Cited by 43 publications

References 11 publications

Behaviour of dissolved inorganic salts in the cooling water of a nuclear power plant open recirculation system and formation of water discharge

Behaviour of dissolved inorganic salts in the cooling water of a nuclear power plant open recirculation system and formation of water discharge

Extending effectiveness to efficiency: Comparing energy and environmental assessment methods for a wet cooling tower

Data‐Driven and Physics‐Based Reduced‐Order Modeling and Optimization of Cooling Tower Systems

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