Heat and mass transfer in natural draft cooling towers

Kashani, M. M. Hemmasian; Добрего, К. В.

doi:10.1007/s10891-013-0930-z

Cited by 9 publications

(6 citation statements)

References 45 publications

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“…The function of WCT is to remove the heat absorbed by recirculating water through a condenser to the atmosphere via the evaporation process [11]. The minimum obtainable temperature of recirculating water in the tower is the wet-bulb temperature of ambient air [12].…”

Section: Introductionmentioning

confidence: 99%

4e (Energy, Exergy, Economic and Environmental) Analysis of the Novel Design of Wet Cooling Tower

Kumar

Zehra

Junejo

et al. 2020

Journal of Thermal Engineering

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This study aims to calculate the performance of the novel design of wet cooling tower (NDWCT) using first law (energy) and second law (exergy) of thermodynamics. Moreover, it determines the economic feasibility (cost savings and payback period) and sustainability of the NDWCT using the life-cycle cost (LCC) and environmental assessment method. An appropriate mathematical model is developed and simulated in Engineering Equation Solver to calculate water savings, performance and payback period of additional investment. The simulation results have a good agreement with the experimental outcomes (error 2.6%). Simulation results revealed that the NDWCT consumes 34.48% less water than the conventional wet cooling tower (WCT). The installation of heat exchanger improves the performance of WCT by 6% because the consumption of water to air ratio increases. Moreover, the exergy destruction in the NDWCT is 1.23 MW lower than the conventional WCT. Additionally, the heat exchanger costs k$30.7 to save an annual fuel cost of k$72 which could be recovered within a payback period of 0.37 years. Lastly, the environmental assessment proves that the NDWCT relinquishes the particulate matter emission by 0.042 g/s.

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Section: Introductionmentioning

confidence: 99%

4e (Energy, Exergy, Economic and Environmental) Analysis of the Novel Design of Wet Cooling Tower

Kumar

Zehra

Junejo

et al. 2020

Journal of Thermal Engineering

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show abstract

“…Studies by Conradie and Kröger [3], Kashania and Dobregob [14] indicate that for Hyperboloid NDDCTs the velocity distribution at the outlet is almost uniform. This is for Froude number conditions of 1 F r D ≤ 3 [15].…”

Section: Nddct Characteristicsmentioning

confidence: 97%

“…Research in the area of cooling towers is primarily focussed on the wet variety. This is attributed to the dominant use of these towers in conventional power plants [14]. However, the research that is specifically focussed on NDDCTs is dominated by design issues: aerodynamic and thermal improvements, instead of integration and optimisation in plant wide dynamic models.…”

Section: Existing Modelsmentioning

confidence: 99%

“…This pressure differential drives the air flow within the tower. The resulting flow rate is dependent on flow resistances, tower dimensions, and the heat exchanger characteristics [3,14,15,17].…”

Section: Nddct Characteristicsmentioning

confidence: 99%

“…This is, however, warranted for NDDCTs with heat exchanger bundles in the horizontal cross-section of the tower. In these configurations the assumption of uniform velocity and pressure profiles at the inlet and outlet of the tower has been validated [3,14,15] and negates the incorporation of three-dimensional effects.…”

Section: Transient Model Fundamental Approachmentioning

confidence: 99%

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Dynamic modelling of cooling systems for concentrating solar power plants

Tapinou¹

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Concentrating solar power (CSP) is a dispatchable renewable energy technology that is envisioned in load-following roles in the future. The net thermal efficiency and dispatchability of a CSP plant can be enhanced through the application of plant wide control strategies. Model-based predictive control (MPC) is a suitable control methodology but requires computationally efficient dynamic models of each CSP plant subsystem. Currently, there are no computationally efficient dynamic models of the cooling system most appropriate for CSP plants-natural draft dry cooling towers (NDDCT) and mechanical draft towers. This work aims to develop a computationally efficient dy-providing me with technical support, motivation, mentoring, and guidance for a thesis that I found very challenging. I am deeply grateful to my close friends: Isabel Hardy; Sean Costello; and Ben Valentine, my family, and others who all provided emotional support and motivation during this testing time. A special mention also to Dr. Michael Forbes who accommodated me when I was struggling to meet deadlines.

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Heat and Mass Transfer in the Over-Shower Zone of a Cooling Tower with Flow Rotation

Kashani

Добрего

2013

J Eng Phys Thermophy

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Heat and mass transfer in natural draft cooling towers

Cited by 9 publications

References 45 publications

4e (Energy, Exergy, Economic and Environmental) Analysis of the Novel Design of Wet Cooling Tower

4e (Energy, Exergy, Economic and Environmental) Analysis of the Novel Design of Wet Cooling Tower

Dynamic modelling of cooling systems for concentrating solar power plants

Heat and Mass Transfer in the Over-Shower Zone of a Cooling Tower with Flow Rotation

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