Effects of geometric structures of air deflectors on thermo-flow performances of air-cooled condenser

Huang, Xianwei; Chen, Lin; Kong, Yanqiang; Yang, Lijun; Du, Xiaoze

doi:10.1016/j.ijheatmasstransfer.2017.11.071

Cited by 23 publications

(20 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Under this condition, a part of the discharged air from the condenser is blocked by the obstruction and the remaining could flow above the obstruction and discharged to the open space. 10,15,20,25,30,35,40,50, and 100 cm. The variation of the distance of the side and front obstructions is aimed to examine the effects of the distance of the obstructions on the performance of the air conditioner.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Air Flow Obstruction in a Condensing Unit on Split Air Conditioner Performance

Setyawan

2020

Jurnal Teknologi

View full text Add to dashboard Cite

Obstructions of air flow in the outdoor unit could block the condenser air flow and reduce its heat rejection As a result, it could decrease the performance of a room air conditioning system. The paper presents the effects of the air flow obstruction of a condensing unit on the performance of a split-type air conditioner with refrigerant R410A. The study was conducted experimentally by employing front and side obstructions with varied distance from the condensing unit. The front obstruction of 100 cm height was applied at varied distance from 10 cm to 100 cm, while the side obstruction of the same height was applied at distance of 5, 10, and 15 cm. The presence of air flow obstructions results in the decrease of cooling capacity and coefficient of performance (COP). On the other hand, it increases the input power of the AC unit. From the experiment, it is obvious that the distance of front obstruction of 10 cm results in the reduction of cooling capacity by 46% and COP by 56%. It is also revealed that the distance of the front obstruction of 50 cm or more has no significant effect for the performance of the air conditioning unit. In addition, the side obstructions have the less significant effect than that of the front obstruction.

show abstract

Section: Methodsmentioning

confidence: 99%

“…They proposed distances of 35 cm, 75 cm, and 50 cm for the distance between walls of 1.5 m, 2 m, and 3m. In powerplant, improper condenser layout could also degrade the performance of an air-cooled condenser [10]. On the other hand, air flow deflector could be used for improving the condenser performance under windy environment [10,11].…”

Section: Introductionmentioning

confidence: 99%

Effect of Air Flow Obstruction in a Condensing Unit on Split Air Conditioner Performance

Setyawan

2020

Jurnal Teknologi

View full text Add to dashboard Cite

show abstract

“…At the present time, the deficit tried of water and the urgency of the use of the alternative sources of energy, have generated important efforts channeled to solve the existing deficiencies in the used technologies. The use of biomass as an energy source for generating electric power has been one of the most widely accepted alternatives in regions with agricultural and forestry potential [1].…”

Section: Introductionmentioning

confidence: 99%

“…Dry cooling systems have the potential to almost eliminate the use of water in the BPP. Among the dry condensers, one of the most widespread is the so-called air-cooled condenser (ACC), being already known and used in the BPP located in countries such as the United States, Turkey, China, Malaysia, India, South Africa, Germany and Spain, although it has not yet been widely disseminated, since it barely covers 1% of current BPP, as proposed by Huang et al [6,7].…”

Section: Introductionmentioning

confidence: 99%

Use of Air Cooled Condenser in Biomass Power Plants: A Case Study in Cuba

Camaraza-Medina¹,

Escalona²,

Retirado-Mediaceja³

et al. 2020

IJHT

View full text Add to dashboard Cite

A new project of investment developed in Cuba has 25 Biomass Power Plants (BPP) with potencies of 20 and 50 MW. The confirmed lack of water to be used in the condensers is an impediment for the project. The use of dry condensers may be a possible solution, however, the cost of the initial project and the reduction in useful power associated with its use is a limitation to consider. In order to define the feasibility of the use of ACC in these projects, a case study is carried out in which several selection criteria for investment alternatives are considered, with three other types of condensation technologies being evaluated with the objective of comparing costs of investment and operation, as well as the profits generated. The analyses were carried out for a horizon of 20 years, obtaining for the ACC uses, a pay off period of 7.6 and 8.4 years, for the facilities of 20 and 50 MW respectively. With the uses of the selection criteria for investment alternatives, was obtained that for facilities of 20 and 50 MW respectively, the Return Interest Rate (IRR) is 18.2 and 23,8 percent, the Net Present Value (NPV) (with 15% update rate) is equal to 1126.9 and 3024.0 MUSD, the cost of the life cycle is 10682.4 and 24406.1 MUSD, while, the levelized cost of electricity production is 0.062 and 0.071 USD/kWh, with a costbenefit ratio of 0.1 and 0.13. The results obtained confirm the feasibility of using ACC systems.

show abstract

“…Gao et al [15] recommended installing deflecting plates below the platform of the ACC to reduce the influence of strong wind on the ACC by introducing sufficient cold air into the windward area of the fan to achieve a uniform air mass flow rate, thereby improving ACCs cooling performance. Huang et al [16] optimized the baffle geometry under the platform of the fan to make the ACC have better heat flow performance in a windy situation. Jin et al [17] proposed to replace the traditional arrangement with a square array of ACC structures to improve the thermal performance of ACCs in a windy situation.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Influence of Mechanical Draft Wet-Cooling Towers on the Cooling Performance of Air-Cooled Condenser with Complex Building Environment

Jun

Dong

et al. 2019

Energies

View full text Add to dashboard Cite

In air-cooled power units, an air-cooled condenser (ACC) is usually accompanied by mechanical draft wet-cooling towers (MCTs) so as to meet the severe cooling requirements of air-cooling auxiliary apparatuses, such as water ring vacuum pumps. When running, both the ACC and MCTs affected each other through their aerodynamic fields. To make the effect of MCTs on the cooling performance of the ACC more prominent, a three-dimensional (3D) numerical model was established for one 2 × 660 MW air-cooling power plant, with full consideration the ACC, MCTs and adjacent main workshops, which was validated by design data and published test results. By numerical simulation, we obtained the effect of hot air recirculation (HAR) on the cooling performance of the ACC under different working conditions and the effect of MCTs on the cooling performance of the ACC. The results showed that as the ambient wind speed increases, the hot recirculation rate (HRR) of the ACC increased and changed significantly with the change of wind directions. An increase in ambient temperature can cause a significant rise in back pressure of the ACC. The exhaust of the MCTs partially entered the ACC under the influence of ambient wind, and the HRR in the affected cooling units was higher than that of the nearby unaffected cooling units. When the MCTs were turned off, the overall HRR of the ACC decreased. The presence of MCTs had a local influence on the cooling performance of only two cooling units, and then slightly impacted the overall cooling performance of the ACC, which provides a good insight into the arrangement optimization of the ACC and the MCTs.

show abstract

Effects of geometric structures of air deflectors on thermo-flow performances of air-cooled condenser

Cited by 23 publications

References 23 publications

Effect of Air Flow Obstruction in a Condensing Unit on Split Air Conditioner Performance

Effect of Air Flow Obstruction in a Condensing Unit on Split Air Conditioner Performance

Use of Air Cooled Condenser in Biomass Power Plants: A Case Study in Cuba

Numerical Investigation on the Influence of Mechanical Draft Wet-Cooling Towers on the Cooling Performance of Air-Cooled Condenser with Complex Building Environment

Contact Info

Product

Resources

About