Performance analysis and optimal parameters of a direct evaporative pad cooling system under the climate conditions of Morocco

Laknizi, Azzeddine; Mahdaoui, Mustapha; Abdellah, Abdelatif Ben; Anoune, Kamal; Bakhouya, Mohamed; Ezbakhe, Hassan

doi:10.1016/j.csite.2018.11.013

Cited by 73 publications

(25 citation statements)

References 19 publications

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“…Existing research also agree in the increase of the Cooling Capacity with greater air velocity [31,42,52,75], which demonstrates that its effect on the increased mass flow rate of treated air is greater than on the decrease of the temperature achievable. For increasing air velocities up to 0.6 m s − 1 , Dogramaci et al [75] obtained a sharp increase of the defined "Specific Cooling Capacity", while it stabilized for even larger air velocities.…”

Section: Air Velocity/flow Ratementioning

confidence: 57%

“…However, results do not agree in terms of the COP; while in their experiments Nada et al [31,42] obtain better COPs for larger pad thicknesses, Laknizi et al [52] observe through simulation that the pad thickness would reduce the value of the COP. In fact, the effect of the pad thickness on the COP cannot be generalized because it depends on the power requirements of the fan (equation ( 5)); larger thicknesses introduce further pressure drop, hence fan power needs, that may or not be compensated by the larger pressure drop and consequent cooling capacity.…”

Section: Pad Geometric Characteristics and Configurationmentioning

confidence: 88%

“…Some authors [31,75] obtain better COPs as the air velocity increases; indeed, Nada et al [42] obtain the maximum COP at air velocity 2.2 m s − 1 . However, the COP may not be clearly related to the air velocity due to the additional fan needs [91], which can even result into worse COPs [52]. Many works provide recommended values for the air velocity, generally towards a balanced saturation effectiveness face to the pressure drop.…”

Section: Air Velocity/flow Ratementioning

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: Air Velocity/flow Ratementioning

confidence: 57%

Section: Pad Geometric Characteristics and Configurationmentioning

confidence: 88%

Section: Air Velocity/flow Ratementioning

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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“…Results indicated that the maximum reduction in the temperature, increase in the humidity and the cooling performance was found to be 11.3ᵒC, 71% and 409 Watts, respectively. Laknizi et al [5] optimized various thermodynamic properties of humid air using a computer program Cool prop. Program was used to relate frontal velocity and the thickness of the pad.…”

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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“…The cocnut noir pad also gave a minimum water mass flow rate of 0.25kg/sec and a maximum air velocity of 5.6ms -1 . Similarly, [40] discovered from an experiment conducted in six cities of Morroco( Erachidia, Marakech, Fez, Tangier and Ifrane) that the thickness of evaporative cooling pads and frontal velocity affect the performance of the fan and pad system. It was observed during the performance tests that the cooling capacity and rate of water consumed increase with increased frontal velocity and pad thickness while the coefficient of performance decreased with increasing frontal velocity and pad thickness.…”

mentioning

confidence: 97%

A review of common natural ventilation and evaporative cooling systems for Greenhouses and the Nigerian reality

Ikechukwu-Edeh¹,

Ndukwu²,

Ahaneku³

2021

Poljoprivredna tehnika

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Greenhouses simulate the "desired" environment for successful growth and development of plants. They, by design, achieve this desired environment by supplying the necessary climatic inputs needed by the plants to strive and at the same time exclude factors impeding the growth of plants, hence it is called a controlled environment. One of the common and most desired attribute of the greenhouse is its ability to provide effective cooling to the plants. This paper reviewed, extensively, the concept of evaporative cooling as applied in greenhouses. Factors like Vapor Pressure deficit (VPD), Relative Humidity, Ambient Temperature were also discussed with regards to its effects on the efficiency of the evaporative cooling system. The efficiencies of the Fan and Pad System and the Fog systems were reviewed and compared with their consequent dependence on factors like nozzle spacing, nozzle length, saturation efficiency of pad material etc. The Natural Ventilation method was also reviewed as a "stand alone " greenhouse cooling method and as an augmentation to other cooling systems. Factors like rate of air exchange, total area of vents, wind speed, vent opening angles etc. were also discussed in line with their effects on the effectiveness of the Natural ventilation method. The Nigerian Perspective on Greenhouses and its Cooling methods was also discussed with reference to local development of evaporative coolers as well as its importation, its affordability, management, availability and appliance to the Nigerian farming culture.

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Performance analysis and optimal parameters of a direct evaporative pad cooling system under the climate conditions of Morocco

Cited by 73 publications

References 19 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

A review of common natural ventilation and evaporative cooling systems for Greenhouses and the Nigerian reality

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