Selection of wetted media for pre-cooling of air entering natural draft dry cooling towers

He, Suoying; Xu, Youzhi; Zhang, Guanhong; Hooman, Kamel; Gao, Ming

doi:10.1016/j.applthermaleng.2016.11.179

Cited by 41 publications

(10 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The stages [8] and layout [9] of the fill are optimized according to the airside velocity distribution to further improve the evaporated rate. There is about an average of 5% improvement of the heat transfer rate with water consumption of 25 kg/s [10,11]. However, during the weather with low temperature and/or high humidity, the loss of fills brings a decrease of the heat transfer rate [12].…”

Section: Introductionmentioning

confidence: 99%

Influence of Operation Schemes on the Performance of the Natural Draft Hybrid Cooling System for Thermal Power Generation

Wei

Chen

et al. 2021

Energies

View full text Add to dashboard Cite

For thermal power generation, the natural draft hybrid cooling system (NDHCs) with airflows in parallel design gives a multi-objective solution for water saving, performance enhancement and maintenance issues, like corrosion, by switching the loads of wet and dry sections. Performances of dry and wet sections interact with each other in the highly integrated system, increasing the complexity of operation strategies. In this context the present paper examines eight different operation schemes to reveal the relationships of ambient conditions and operation schemes. Comprehensive comparisons in the view of cooling efficiency with a same water inlet temperature are conducted firstly. Results show that there exists energy-saving potentials of the water evaporated rate, cooling performances and the pump power for different schemes. Based on the practical boundary conditions, including those of weather data, operation hours and market factors, optimal operation strategies of hybrid cooling are designed to minimize the operation costs of the energy system. For the 660 MW power generating unit integrated with a natural draft dry cooling system (NDDCs), operation costs based on NDHC after optimization decreased about 0.8% in 2010 and 0.35% in 2018 compared with that of the basic system. When comparing with the designed operation modes of hybrid cooling, 0.07 million dollars is saved after optimization.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of Operation Schemes on the Performance of the Natural Draft Hybrid Cooling System for Thermal Power Generation

Wei

Chen

et al. 2021

Energies

View full text Add to dashboard Cite

show abstract

“…They pointed out that the dew point effectiveness ranged from 46.7% to 78.6% for the cooler with polystyrene and nylon fiber coated on the plate surface. He et al [18] developed a numerical model to study the evaporative pre-cooling performance of the cooling towers with two types wetted medium. It was reported that the Cellulose7060 allowed a marked improvement on the cooling efficiency.…”

Section: Introductionmentioning

confidence: 99%

On the Study of a Hybrid Indirect Evaporative Pre-Cooling System for Various Climates

Cui

Sun²,

Zhang

et al. 2019

Energies

View full text Add to dashboard Cite

A hybrid air-conditioning system has been proposed by integrating an indirect evaporative pre-cooling unit. In the proposed system, the room exhaust air is employed in the indirect evaporative cooler (IEC) to pre-condition the ambient intake air. The mathematical formulation has been judiciously established for the pre-cooling IEC. The validation of the numerical model has been conducted by comparing the simulated results with the experimental data in terms of the outlet temperature and the heat flux along the heat exchanger surface. The pre-cooling performance of the IEC is theoretically investigated for the climate in representative cities selected from five different climate zones. The psychrometric illustration of the air conditioning variation has indicated that the ambient air can be pre-cooled and pre-dehumidified through the IEC. The possibility of water vapor condensation depends on the humidity ratio of the ambient intake air. The simulation result demonstrates the capability of the pre-cooling IEC to fulfill part of the cooling load of the ambient intake air resulting in a marked energy saving potential.

show abstract

“…He et al investigated whether the precooling of inlet air using Munters media can enhance the performance of natural draft dry cooling tower (NDDCT) on hot and dry days. Three Munters media (CELdek7060, CELdek7090, and CELdek5090) of different thicknesses were used and it was found that precooling with 0.10 and 0.15 m CELdek7060 was best in performance among them.…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of two different types of fills used in wet cooling tower for higher‐scale water with conventional film type fill

Raj

Prakash

Pathak

2019

Heat Trans. Asian Res.

View full text Add to dashboard Cite

In the present study, an induced draft wet cooling tower has been experimentally investigated using film, glass, and ball fills. Film fills are used only in industry where scaling is less or low-scale process water is used because of clogging of fills. Whereas, glass fills and ball fills are used for higher-scale water. The main objective of this study is to investigate the performance and compare the result of film fills with glass fills and ball fills and also predict the loss as compared to film fills when glass and ball fills were used for high-scaling water under such environmental conditions and different ratio of water to air flow and water inlet temperatures. Various performance parameters are analyzed for each of the fills and it was found that tower characteristics of film fills are 18.56% and 15.59% more than that of glass and ball fills, respectively, at water inlet temperature of 43°C and water-to-air flow ratio of 0.62. Moreover, exergy destruction was also calculated for each of the fills and it was observed that film fills destruct less exergy as compared with glass and ball fills. K E Y W O R D S ball fill, evaporation rate, exergy destruction, film fill, glass fill, tower characteristics

show abstract

Selection of wetted media for pre-cooling of air entering natural draft dry cooling towers

Cited by 41 publications

References 27 publications

Influence of Operation Schemes on the Performance of the Natural Draft Hybrid Cooling System for Thermal Power Generation

Influence of Operation Schemes on the Performance of the Natural Draft Hybrid Cooling System for Thermal Power Generation

On the Study of a Hybrid Indirect Evaporative Pre-Cooling System for Various Climates

Comparative analysis of two different types of fills used in wet cooling tower for higher‐scale water with conventional film type fill

Contact Info

Product

Resources

About