Numerical and experimental investigation of a novel configuration of indirect evaporative cooler with internal baffles

Kabeel, A.E.; Abdelgaied, Mohamed

doi:10.1016/j.enconman.2016.08.028

Cited by 70 publications

(29 citation statements)

References 21 publications

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“…The results revealed that the wet-bulb effectiveness of the REC rated from 0.55 to 1.06 with energy efficiency ratio varied from 2.8 to 15.5. Kabeel and Abdelgaied [6] carried out experimental and numerical studies of a novel counter-flow REC with internal baffles in the dry channel. They demonstrated that the wet-bulb effectiveness of the novel REC increased with increased number of baffles.…”

Section: Introductionmentioning

confidence: 99%

The energy and exergy analysis of counter-flow regenerative evaporative cooler

et al. 2019

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Recently the regenerative evaporative cooler (REC) has drawn great attention from researchers because it can cool the intake air below the wet-bulb temperature and approaching its dew point temperature. For further understanding of the heat and mass transfer occurred in a counter-flow REC, a novel mathematical model is developed based on the law of energy conservation and the principle of the thermodynamic theory. The proposed mathematical model is validated against experimental data from literature. The parametric study is performed to investigate the performance of the REC under different operating and geometrical conditions. It is found that the exergy destruction and exergy efficiency ratio of the REC are strongly influenced by the intake air velocity, the working to intake air ratio and channel gap, followed by the channel length. The working to intake air ratio choosing from 0.3 to 0.4 is appropriate in order to achieve better thermal performance with permissible level of thermodynamic cost. Moreover, the results obtained in this paper reveal that the best thermal performance does not correspond to the best thermodynamic performance. Thus, both the first and second law of thermodynamics should be considered for a comprehensive analysis.

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Section: Introductionmentioning

confidence: 99%

The energy and exergy analysis of counter-flow regenerative evaporative cooler

et al. 2019

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“…However, as the humidity increased, the cooling capacity decreased. Kabeel and Abdelgaied [20] investigated the performance of IEC based on a hybrid pattern, numerically and experimentally. They used thin cotton film for the channel's wall and coated with an aluminum sheet to keep the dry channel from moisture.…”

Section: Tfec-2018-21631mentioning

confidence: 99%

Theoretical Analysis of Combined Compact Evaporative Cooler

Ismael

Ezzi

2018

Proceeding of 3rd Thermal and Fluids Engineering Conference (TFEC)

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An evaporative cooling system (ECS) has a number of benefits. First and foremost, it will use only a fraction of the energy of typical compressor-based cooling systems. ECS's is divided into three different types: 1) direct evaporative coolers (DECs), 2) indirect evaporative coolers (IECs), and (3) a combined system of direct and indirect evaporative coolers (DIECs). Although the DEC is simple and economical, the efficiency is low, as it cannot achieve a cooling temperature lower than wet bulb temperature. While some IECs or DIECs can achieve a higher performance, the system is complex and the initial cost is high. This paper presents a theoretical model of a combined compact evaporative cooler (CCEC), which utilizes thin film evaporation. To verify the model, the prediction has compared with experimental data, and results show that the model can be used to predict the effects of relative humidity and air flow rate based on the wet bulb effectiveness and dew point effectiveness in this CCEC system. Most importantly, it shows that this CCEC system can achieve an ultra-high cooling efficiency.

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“…Their results showed that the wet-bulb efficiency was between 92% and 114% and the dew-point efficiency was between 58% and 84%. Kabeel and Abdelgaied [11] experimentally studied a counter-flow dew-point evaporative cooler with a baffle in the dry channel. Lee and Lee [12] experimentally studied the cooling in a dew-point evaporative cooler with ribs in the wet and dry channels.…”

mentioning

confidence: 99%

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

Liu

Akhlaghi

Zhao

et al. 2019

Energy and Buildings

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This paper investigated the cooling performance of a high-efficiency dew-point evaporative cooler with optimised air and water flow arrangement using the combined experimental and numerical simulation method. The experimental results showed that the wet-bulb efficiency of the dew-point evaporative cooler was increased by 29.3% and COP was increased by 34.6%, compared to the existing commercial dew point air cooler of the same capacity. An improved two-dimensional, multi-factor engaged numerical model which can scale up and optimize the size and capacity of the cooler was developed. The numerical predictions agreed well with the experimental results, indicating that the cooling rate of the dew-point evaporative cooler is influenced by the dew-point evaporative cooler structure. The cooling efficiency of the dew-point evaporative cooler with corrugated plates is more than 10% higher than with flat plates and the cooling efficiency of the dew-point evaporative cooler with the actual flow arrangement is only 62%-67% that of a dew-point evaporative cooler with an ideal counter-flow arrangement. The cooling efficiency can be improved by increasing the channel length and the air entrance length, and decreasing the channel width and channel gap within a reasonable range.

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Numerical and experimental investigation of a novel configuration of indirect evaporative cooler with internal baffles

Cited by 70 publications

References 21 publications

The energy and exergy analysis of counter-flow regenerative evaporative cooler

The energy and exergy analysis of counter-flow regenerative evaporative cooler

Theoretical Analysis of Combined Compact Evaporative Cooler

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

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