Experimental investigation of energy and exergy performance of a direct evaporative cooler using a new pad type

Nada, S.A.; Fouda, A.; Mahmoud, Mostafa A. A.; Elattar, H.F.

doi:10.1016/j.enbuild.2019.109449

Cited by 63 publications

(37 citation statements)

References 32 publications

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“…Al-Mogbel et al [30] distinguish "Effectiveness of DEC cooler" from "Effectiveness of IEC cooler". Some authors [10,[31][32][33][34][35][36] define the "cooling efficiency" clarifying that it is the saturation efficiency/effectiveness. Al-Badri and Al-Waaly [37] specify that "the effectiveness of DEC was expressed by the saturation efficiency".…”

Section: Abbreviationsmentioning

confidence: 99%

“…Experimental results from Camargo et al [61] show that the saturation effectiveness improves for higher DBT, when "more cooling is necessary to propitiate thermal comfort"; however, no information is given about the air humidity. Similarly, Nada et al [31,42] observe that larger inlet DBT result into also larger humidity increase and consequent temperature drop, cooling capacity and coefficient of performance, as well as into an increase in the saturation effectiveness, but do not provide information on the inlet air humidity during the tests. Sheng and Nnanna [63] also provide experimental results of the saturation effectiveness increase with the DBT, though observe the relevance of air humidity and propose the study of the saturation effectiveness variation in terms of the "humidity ratio increase" (in g/kg).…”

Section: Inlet Air Psychrometric Conditionsmentioning

confidence: 99%

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Optimal operation of evaporative cooling pads: A review

Tejero‐González

Franco-Salas

2021

Renewable and Sustainable Energy Reviews

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Direct evaporative cooling is widely known for being an energy efficient air conditioning solution for arid and/or semi-arid climates. Commercialized evaporative cooling pads vary in material and construction characteristics, while existing research proposes several alternative wetted media and configurations. The most studied factors on the evaporative cooling pads operation are the air velocity or air mass flow rate, air psychrometric conditions; the pad thickness, its geometric characteristics and configuration, and the water flow rate supplied. The pads performance is commonly characterized through its saturation effectiveness, pressure drop, temperature drop and humidity increase achieved in the treated air, water evaporation and consumption, cooling capacity, coefficient of performance and the heat and mass transfer coefficients. Present work conducts a critical review on the existing experimental and theoretical research on commercial and alternative wetted media, identifies the gaps in the literature, proposes uniform nomenclature and methodologies, and provides a critical view on the optimal operating conditions from wetted-surface evaporative coolers.

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Section: Abbreviationsmentioning

confidence: 99%

Section: Inlet Air Psychrometric Conditionsmentioning

confidence: 99%

Optimal operation of evaporative cooling pads: A review

Tejero‐González

Franco-Salas

2021

Renewable and Sustainable Energy Reviews

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“…It makes use of additional air source that is heated before it reaches the cooling pads. This generates cooler air [3]. The current topic discusses direct evaporative cooling mechanism and coconut coir as the cooling pad material selected in this study.…”

Section: Introductionmentioning

confidence: 99%

Parametric Analysis for Varying Packing Materials and Water Temperatures in a Humidifier

Salins¹,

Siddiqui²,

Reddy³

2020

Proceedings of the 7th International Conference on Fluid Flow, Heat and Mass Transfer (FFHMT'20)

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“…Marmouch et al 9 studied the characteristics of a packing bed to be used in the cooling tower of the HDH fresh water production system. Recently, Nada et al 10 evaluated the performance of air humidification in a new packing bed at different air and water flow rates and temperatures and different thicknesses of the packing bed to find the parameters that give optimum performance. Zhani and Ben Bacha 11 experimentally studied the variation of relative humidity (RH) in the air heater and humidifier of the HDH system.…”

Section: Introductionmentioning

confidence: 99%

Augmentation of solar‐assisted humidification‐dehumidification water desalination system using heat recovery and thermal energy storage system

et al. 2020

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Summary In previous investigations, humidification‐dehumidification (HDH) solar‐assisted desalination systems were designed produce the daily fresh water during sun hours which lead to big sizes and unsteady systems. In the present study, integration of solar‐assisted HDH desalination system with heat recovery and thermal energy storage unit is developed to enhance system productivity, reduces auxiliary power consumptions and system size and assure system continuous operation. The mathematical modelling based on energy and mass conservation equations is presented and solved using iterative techniques by C++ and engineering equation solver software. Detailed parametric study of the developed system is conducted for wide ranges of operating conditions and design parameters to study the effects of integrating the HDH system with solar collectors, heat recovery and thermal energy storage units on the system performance. The results revealed that (i) this integration improves system productivity and reduces operating cost, (ii) increasing air to water mass ratio and sea water temperature and decreasing ambient humidity decrease water productivity and gained output ratio (GOR) and increase operating cost parameter (OCP) and (iii) increasing air inlet temperature and sea water flow rates increase GOR and decrease OCP. Comparison with previous systems showed that the proposed system reduces the electric heating power of the system at solar noon by 37% at MR = 0.5 and gives daily fresh water productivity (123.7 kg/h) two times more than previous systems with comparable OCP (0.099 $/kg).

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Experimental investigation of energy and exergy performance of a direct evaporative cooler using a new pad type

Cited by 63 publications

References 32 publications

Optimal operation of evaporative cooling pads: A review

Optimal operation of evaporative cooling pads: A review

Parametric Analysis for Varying Packing Materials and Water Temperatures in a Humidifier

Augmentation of solar‐assisted humidification‐dehumidification water desalination system using heat recovery and thermal energy storage system

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