Retrofit of a wet cooling tower in order to reduce water and fan power consumption using a wet/dry approach

Dehaghani, Shahed Taghian; Ahmadikia, Hossein

doi:10.1016/j.applthermaleng.2017.07.069

Cited by 51 publications

(7 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the 1970s, cooling towers both wet and dry were combined as hybrid cooling towers (Taghian Dehaghani and Ahmadikia, 2017). Therefore, hybrid cooling towers' components have the advantages of both cooling towers (RD Mitchell, 1989).…”

Section: Hybrid Cooling Towersmentioning

confidence: 99%

See 1 more Smart Citation

Advancing Water Conservation in Cooling Towers through Energy-Water Nexus

Ghoddousi

Anderson

Rezaie

2021

EUR J SUSTAIN DEV RES

View full text Add to dashboard Cite

Life without water is not possible on the earth, while modern humans need water not only for drinking, sanitization, and agriculture but also for industrial activities including electricity and cooling generations. Hence, emphasis on water sustainability through different sectors including thermoelectric and cooling plants is an intelligent strategy while the tight connections of water and energy guide study towards energy-water nexus investigations. Cooling towers are equipment for dissipating the excess heat by water evaporation or they hidden gates for wasting water. The objective of the present study is to elaborate on the role of cooling towers in improving environment sustainability by presenting various methods of energy and water modeling, categorizing various methods for modifying water and energy consumptions through past studies and mapping future studies. regarding cooling towers. Presenting a history of energy-water modeling methods of cooling towers, the Markel, the Poppe, and the effectiveness-Number of Transfer Unit (NTU) models, has followed by assessing the environmental impact of cooling towers in the form of excess water consumption, plume, and energy usage. Summarizing and organizing the past efforts for upgrading water management in cooling towers have been in two directions either providing more water supply, or modifications of the cooling tower to use less water. Then the different methodologies for each direction are introduced for further elaborations. This study's practical outcome is proposing the methods of improving water sustainability for any cooling towers from past studies to assist engineers in the industry in modifying cooling towers water consumption. Showing the roadmap for the planning future investigations on the cooling towers based on the past efforts is another outcome of the present study to provide an insight for academia with research interest on cooling towers.

show abstract

Section: Hybrid Cooling Towersmentioning

confidence: 99%

“…A method of retrofitting existing wet cooling towers to reduce water consumption was introduced by using air-cooled heat exchangers in an existing wet cooling tower (Taghian Dehaghani and Ahmadikia, 2017). The existing wet fill was lowered to make room for the dry section.…”

Section: Natural Gasmentioning

confidence: 99%

Advancing Water Conservation in Cooling Towers through Energy-Water Nexus

Ghoddousi

Anderson

Rezaie

2021

EUR J SUSTAIN DEV RES

View full text Add to dashboard Cite

show abstract

“…Among different auxiliary components, the WCT accounts for 2.2-3.4% of total power generation [10]. 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

View full text Add to dashboard Cite

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.

show abstract

“…The relationship between water requirements and power generation has been studied extensively. Dehaghani and Ahmadikia studied computationally retrofitting a 12‐cell wet tower and a dry hybrid cooling system configuration with a high accuracy air flow regulation to decrease fan power and water requirement. It was found that increasing accuracy of air flow control leads to decrease in consumed power by the fan by about 64.6%; while retrofitting with the dry/wet hybrid system decreases water consumption by about 9.4%.…”

Section: Introductionmentioning

confidence: 99%

Water usage and energy penalty of different hybrid cooling system configurations for a natural gas combined cycle power plant—Effect of carbon capture unit integration

et al. 2019

View full text Add to dashboard Cite

Summary Electric power generation from thermoelectric power plants is associated with a negative impact on water availability, referenced as the water‐energy nexus, which is aggravated by climate change. In the present study, the effect of four different hybrid cooling system configurations on water usage and power penalty of a natural gas combined cycle has been investigated. The hybrid cooling system with a parallel connected indirect dry cooling system and wet cooling system is the most conventional studied hybrid cooling system in the literature, while the other studied hybrid configurations in the present study are novel regarding their effect on water requirement and power penalty. Simulations were conducted using the COCO 3.3 software and have been validated using data sets from a reference natural gas combined cycle plant, both with and without carbon capture unit, which is available in the literature. Four hybrid cooling system configurations were explored to evaluate their water requirements and power penalty. Other conventional cooling systems such as closed cooling, once‐through, and direct and indirect dry cooling methods were simulated with and without postcombustion carbon capture (PCCC) integration for comparison. It was found that the hybrid configuration, including indirect air‐cooled condenser and natural draft wet cooling tower, has the best performance as compared to the other conventional and hybrid cooling systems, amounting to 2.038 (gal/min)/MWnet, 1.573 (gal/min)/MWnet, and 12.29 MW for water withdrawal, consumption, and energy penalty, respectively, for the case of a unit without PCCC unit and 3.9 (gal/min)/MWnet, 2.928 (gal/min)/MWnet, and 15.177 MW for water withdrawal, consumption, and energy penalty, respectively, for a unit with carbon capture unit. It was confirmed that the PCCC integration approximately doubles the water withdrawal and consumption for all cooling systems. In addition, the indirect air‐cooled condenser and wet cooling tower is still the best performing cooling system with PCCC integration.

show abstract

Retrofit of a wet cooling tower in order to reduce water and fan power consumption using a wet/dry approach

Cited by 51 publications

References 15 publications

Advancing Water Conservation in Cooling Towers through Energy-Water Nexus

Advancing Water Conservation in Cooling Towers through Energy-Water Nexus

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

Water usage and energy penalty of different hybrid cooling system configurations for a natural gas combined cycle power plant—Effect of carbon capture unit integration

Contact Info

Product

Resources

About