Performance comparison of the advanced indirect evaporative air coolers

Pandelidis, Demis; Anisimov, Sergey; Rajski, Krzysztof; Brychcy, Ewa; Sidorczyk, M.

doi:10.1016/j.energy.2017.06.111

Cited by 35 publications

(9 citation statements)

References 37 publications

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“…They reported that the regenerative IEC obtained a higher cooling effectiveness, especially at the second stage of the supply air. Pandelidis et al [15] also conducted a comparative study to investigate the impact of different flow schemes. Shen et al [16] studied the energy savings for condenser evaporative cooling at 16 locations.…”

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

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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.

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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

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“…Several mathematical models were also reported based on improved analytical methods, for example the ε‐ NTU method and the LMTD method . Pandelidis et al compared the cooling effectiveness of three advanced IECs and pointed out that the combined cross‐regenerative counter flow arrangement was able to achieve the highest overall cooling performance. Wan et al illustrated the development of a simplified correlation by considering five dimensionless factors derived from simulation results.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation and comparison of multistage indirect evaporative cooling systems in two operation modes

et al. 2019

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The evaporative cooling technique is an efficient approach for cooling application. This study aims to establish a performance evaluation method to advance the appropriate design for multistage indirect evaporative cooling systems. A mathematical formulation has been developed for the indirect evaporative cooler (IEC). After the validation, the mathematical model was used to analyze the evaluation criteria by considering the simultaneous influence of the cooling effectiveness, the pressure drop, and the cooling capacity of the multistage IEC operating in two modes. The Mode-1 IEC is a conventional counterflow unit, while the Mode-2 IEC employs a regenerative M-cycle arrangement. The IECs are operated in a tandem arrangement. The multistage system is capable of improving the cooling performance and reducing the outlet air temperature. In addition, the multistage system displays a higher pressure drop resulting in a lager consumption of fan power. The analysis of performance evaluation criteria indicates that the appropriate maximum stage is suggested to be three-stage and two-stage for the Mode-1 and the Mode-2 IEC, respectively.

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“…After this, many studies were performed on the structural design of the Maisotsenko (M)-cycle-based heat and mass exchanger (HMX) to find the optimal geometric and flow parameters to yield its maximum performance. Analyses based on cross-flow [9], counter-flow [10,11], and hybrid configurations [12] of HMXs are reported in the literature. Khalid et al [13] experimentally analyzed the performance of a cross-flow HMX under low-velocity conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Afterwards, researchers focused on improving the energy efficiency of the dew point evaporative cooler [18][19][20][21]. For this purpose, some other structural modifications [12] were also presented in the HMX to increase the performance parameters; however, these structural modifications only increase the manufacturing complexities of the design. In a recent work by Tariq et al [11], the wet fluid was altered from a conventional evaporating medium (water) to an alumina-based nanofluid.…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance Enhancement of a Cross-Flow-Type Maisotsenko Heat and Mass Exchanger Using Various Nanofluids

et al. 2018

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The incorporation of a Maisotsenko (M) Cycle into an indirect evaporative cooler has led to the achievement of sub-wet bulb temperature without any humidification, thus making it a possible green and sustainable alternative for handling the cooling load of a building. In this work, the thermal performance of a cross-flow heat and mass exchanger (HMX) is enhanced by the addition of nanoparticles in the wet channel because they significantly influence the heat and mass transfer characteristics of the base fluid. A governing model for the temperature and humidity variations of the HMX is numerically simulated. Initial benchmarking is achieved using water properties. Afterward, a comparative study is conducted using aluminum-oxide-, copper-oxide-, and titanium-oxide-based nanofluids. Enhancements of 24.2% in heat flux, 19.24% in wet bulb effectiveness, 7.04% in dew point effectiveness, 29.66% in cooling capacity, and 28.43% in energy efficiency ratio are observed by using alumina-based nanofluid as compared to water in the wet channel of the cross-flow HMX. Furthermore, a particle volume concentration of 1% and a particle diameter of 20nm are recommended for maximum performance.

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Performance comparison of the advanced indirect evaporative air coolers

Cited by 35 publications

References 37 publications

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

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

Performance evaluation and comparison of multistage indirect evaporative cooling systems in two operation modes

Thermal Performance Enhancement of a Cross-Flow-Type Maisotsenko Heat and Mass Exchanger Using Various Nanofluids

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