Experimental and numerical investigation of a high-efficiency dew-point evaporative cooler

Liu, Yuting; Akhlaghi, Yousef Golizadeh; Zhao, Xudong; Li, Junming

doi:10.1016/j.enbuild.2019.05.038

Cited by 58 publications

(20 citation statements)

References 34 publications

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“…In this study, the researchers found the optimal channel length and working ratio for different scenarios. Liu et al [35] also researched the optimized DPIEC in terms of water flow arrangement. They used experimental and numerical methods to analyze the exchanger.…”

Section: Optimization the Dpiecmentioning

confidence: 99%

Review of Dew Point Evaporative Cooling Technology for Air Conditioning Applications

Pacak

Worek

2021

Applied Sciences

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Indirect evaporative cooling has the potential to significantly improve the natural environment. It follows from a significant reduction in electricity consumption in the hot period, and hence lower operating costs for cooling systems. This paper presents the current state of knowledge and research directions on dew point indirect evaporative cooling. It was found that researchers focus on the development of dew point indirect evaporative coolers (DPIEC) by improving its design, geometry, water distribution, and new porous materials implementation. To evaluate the performance of new types of DPIEC, different methods are used by the scientists. Finally, optimized devices are studied in terms of their performance in different systems, like hybrid and desiccant systems, considering different climate conditions. Potential directions of development of evaporative technologies were indicated, such as increasing the coefficient of performance of solid desiccant evaporative cooling systems, developing novel geometry, and efficient water distribution, including development of porous materials.

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Section: Optimization the Dpiecmentioning

confidence: 99%

Review of Dew Point Evaporative Cooling Technology for Air Conditioning Applications

Pacak

Worek

2021

Applied Sciences

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“…1 = −5800.2205, 2 = 1.3914993, 3 = −0.04860239, 4 = 4.1764769 × 10 −5 , 5 = −1.4452093 × 10 −8 , a 6 = 6.5459673, = 101325 . The convective mass transfer coefficient and the convective heat transfer coefficient in the wet channel are associated by the Lewis number (Liu et al, 2019).…”

Section: Counter-flow Dew Point Evaporative Cooling Modelmentioning

confidence: 99%

Numerical study on performance of the dew point evaporative cooling system

Liu

Jing

Zhao

et al. 2021

JTST

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The dew point evaporative air conditioning system has gradually become an attractive research area in recent years because of its low energy consumption and environmental friendly advantage. How to improve the system efficiency is the focus of current research. This paper presents the theoretical performance of the dew point evaporation model with or without perforations. The heat and mass transfer model of the dew point evaporative cooling system was established and solved. It was found that the optimal supply air ratio was 0.7-0.8 and the value of the channel height was 4mm-5mm according to the evaluation parameter of the cooling capacity. Compared with other parameters, the supply air ratio has a more significant effect on the performance of the perforated cooling system. Single perforation has the best cooling system performance with supply air ratio of 0.5-0.7. Two perforations is the best for supply air ratio 0.3-0.4, while three perforations is more appropriate when supply air ratio is 0.2.

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“…Liu et.al [1] investigated experimentally and theoretically the refrigeration behaviour of a highly efficient dew point evaporative cooler using most effective air and water flow arrangements. Different results obtained from the experiments reported the improvement of 29.3% in the cooler wet bulb efficiency.…”

Section: Experimental Research Of Dew Point Coolersmentioning

confidence: 99%

A Review of Recent Experimental and Theoretical Research of Dew Point Evaporative Coolers

Patunkar¹,

Dingare²,

Bhojwani³

2020

E3S Web Conf.

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Evaporative cooling is one of the techniques to lower the ambient air temperature according to the requirements. The technique includes the injection of moisture in the coming air, thus increasing its specific humidity. This technique can cool the air up to wet bulb temperature of the incoming air. In the recent past, the techniques are developed to lower the temperature of air without addition of moisture in the incoming air. These techniques demonstrate that the incoming air temperature can be approached near the dew point temperature of the incoming air. The present paper essentially focuses on the recent theoretical and experimental research of dew point evaporative coolers. Different flow configurations of heat exchange mediums, optimization of geometrical parameters, performance parameters (wet bulb and dew point effectiveness), energy efficiency ratio and energy saving potential are the key elements to study the prospects of dew point evaporative coolers over the conventional refrigeration systems operated by mechanical means. Dew point evaporative cooling technology is environmental friendly and has the potential in reducing the impact on earth due to global warming.

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Experimental and numerical investigation of a high-efficiency dew-point evaporative cooler

Cited by 58 publications

References 34 publications

Review of Dew Point Evaporative Cooling Technology for Air Conditioning Applications

Review of Dew Point Evaporative Cooling Technology for Air Conditioning Applications

Numerical study on performance of the dew point evaporative cooling system

A Review of Recent Experimental and Theoretical Research of Dew Point Evaporative Coolers

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