Positive impact of a tower inlet cover on natural draft dry cooling towers under crosswind conditions

Liu, Quanlong; Lin, Xiaopei; Hu, Mengqi; Li, Xiaoxiao; Mi, Zihao; Jia, Junjie

doi:10.1016/j.applthermaleng.2018.04.129

Cited by 15 publications

(6 citation statements)

References 32 publications

(51 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The realizbale k-ε has been extensively validated for a wide range of flows including rotating shear flows, boundary layer flows and separated flows and has been shown to be well suited to modelling both short and large NDDCTs. 5,15 The governing equations can be expressed as general form: the expression of the normal∅, normalΓnormal∅,normal normalandnormal Snormal∅ in the above equation are listed in Table 1.…”

Section: Thermo-flow Performance Of a Single Nddctmentioning

confidence: 99%

“…To date, the emphasis of much of the research on these NDDCTs has been on understanding the effect of wind speed, ambient temperature, the tower design and using windbreaks [9][10][11][12][13][14] on performance. In their study, Liu et al 15 proposed an inlet cover to improve the performance of a short NDDCT. It was shown that an inlet cover did not affect the flow within the tower at the no-wind condition.…”

Section: Introductionmentioning

confidence: 99%

“…In their study, Liu et al. 15 proposed an inlet cover to improve the performance of a short NDDCT. It was shown that an inlet cover did not affect the flow within the tower at the no-wind condition.…”

Section: Introductionmentioning

confidence: 99%

“…Figure15. Velocity contour at central vertical cross section of three NDDCTs with the tower spacing of (a) 3D and (b) 1.16D.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Impact of tower spacing on the performance of multiple short natural draft dry cooling towers for calm conditions

Khamooshi

Anderson

Nates

2020

Proceedings of the Institution of Mechanical Engineers, Part A:

View full text Add to dashboard Cite

Natural draft dry cooling towers (NDDCTs) serve a fundamental role in the deployment of concentrating solar power (CSP) plants. In a multi-tower cooling system, there is a need to be able to position them correctly so that their performance as a group is maximised. To do this, an understanding of the effect they have on one another is needed. Hence, this work investigated the effect of tower spacing on the performance of multiple cooling towers under calm conditions using computational fluid dynamics (CFD) simulations. The applied CFD methods were validated by comparing the current results with real cooling tower results. It found that towers in close proximity would compete for air at their inlet, resulting in distorted velocity and temperature distributions at the radiator surface. Furthermore, the results show that at a tower spacing of less than two tower diameters (2 D) where D is the diameter of the tower, a reduction in the scavenging area between the towers limits the air supply to the towers and this interaction decreases the cooling performance of the towers. The results of three NDDCTs showed that the heat rejection of the middle tower which is surrounded by two towers is highly influenced by the tower spacing and at very low tower spacings, the heat rejection decreases by up to 15%. This new finding holds particular design significance if multiple NDDCTs are deployed on CSP sites that experience a high frequency of calm (no-wind) conditions.

show abstract

Section: Thermo-flow Performance Of a Single Nddctmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Figure15. Velocity contour at central vertical cross section of three NDDCTs with the tower spacing of (a) 3D and (b) 1.16D.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Impact of tower spacing on the performance of multiple short natural draft dry cooling towers for calm conditions

Khamooshi

Anderson

Nates

2020

Proceedings of the Institution of Mechanical Engineers, Part A:

View full text Add to dashboard Cite

show abstract

“…Since the enhancement by this kind of windbreak can be achieved only when the wind direction is normal to the wall, several alternative measures have been proposed, such as installing an enclosure outside the cooling tower (Fig. 15 (b)) [72,86,107,108], installing a labyrinth structure [85] or installing a number of wind deflectors (Fig. 15 (c)) [67,87,103,[109][110][111][112][113][114][115].…”

Section: External Windbreak Wallmentioning

confidence: 99%

A review of the crosswind effect on the natural draft cooling towers

Gurgenci

Guan

et al. 2019

Applied Thermal Engineering

Self Cite

View full text Add to dashboard Cite

Crosswind is a significant concern for the design and operation of a natural draft cooling tower. The negative effects of crosswind on the thermal performance of natural draft cooling towers have been shown in many cases, for a variety of tower types. This paper presents a comprehensive review to synthesize the current research status in this field. At first, three common cooling tower research methods used to quantify the crosswind effect: full-scale/field measurements, lab-scale tests and CFD modelling, are reviewed and discussed. Then, based on the existing literature, the crosswind effect and its working mechanism on different types of natural draft cooling towers are summarized and discussed. Finally, the most current findings and solutions to address the crosswind issue are reported. The main advantages and disadvantages of each solution are presented and discussed. The information collected in this review paper could be a useful guidance for the design and optimization of natural draft cooling tower.

show abstract