Do non-metallic material and radiation shields affect the operation of direct evaporative cooling systems?

Alamdari, Pedram; Saedodin, Seyfolah; Rejvani, Mousa

doi:10.1016/j.ijrefrig.2020.02.038

Cited by 10 publications

(3 citation statements)

References 25 publications

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“…They observe that ceramic tubes which are not exposed to solar radiation maintain their surface temperature at about the WBT of ambient air, while exposed surfaces present higher temperatures, although still 2–4°C below ambient air DBT. Alamdari et al (2020) observe that DEC system performance differs to a great extent from the ideally adiabatic operation when affected by solar radiation. They compare a metallic‐casing to polycarbonate‐casing DEC systems in warm, dry climate conditions.…”

Section: Less Studied Influencing Factorsmentioning

confidence: 99%

Direct evaporative cooling from wetted surfaces: Challenges for a clean air conditioning solution

Tejero‐González

Franco-Salas

2021

WIREs Energy & Environment

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Evaporative cooling has a major role to play in fighting climate change and in achieving a low‐carbon economy. As it helps to reduce energy demand for air conditioning, it is gaining attention in terms of improving energy efficiency in buildings. Evaporative cooling from wetted media can enhance water–air contact, thereby improving heat and mass transfer further and avoiding aerosols. Wetted media are commonly called evaporative cooling pads and are widely used in greenhouses, intensive livestock farming, and industrial facilities. However, a deep understanding of evaporative cooling pad performance can enhance their application to indoor occupied spaces such as residential or commercial cooling, or in hybrid air conditioning systems. Most studies analyze pad performance mainly in terms of pressure drop and saturation effectiveness. However, some studies propose alternative cooling efficiency parameters and others provide insights into key aspects such as power requirements and the coefficient of performance, water consumption, risk of water entrainment, material decay, and air quality, as well as the effect of water temperature and salinity, solar radiation, or wind speed. Existing results on these less studied performance issues are reviewed, and we identify the gaps in the literature in addition to highlighting the main challenges encountered, in an effort to guide future researchers in the field and enhance the application of direct evaporative cooling. This article is categorized under: Energy Efficiency > Systems and Infrastructure Energy Systems Analysis > Systems and Infrastructure

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Section: Less Studied Influencing Factorsmentioning

confidence: 99%

Direct evaporative cooling from wetted surfaces: Challenges for a clean air conditioning solution

Tejero‐González

Franco-Salas

2021

WIREs Energy & Environment

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“…Alamdari et al (2020) investigated the performance and water consumption of evaporative-based cooler manufactured by RFX polycarbonate-structured sheet (PSS) and compared it with the metal-casing one. The assessments show about 20.6% reduction in the usage of water in RFX polycarbonate-casing cooler compared with the metallic material.…”

Section: Introductionmentioning

confidence: 99%

“…Laknizi et al (2019) also examined the use of natural materials in the form of pottery tube rods in Morocco for cooling-pad material, while Nada et al (2019) applied cellulose paper in the form of a beehive structure as a cooling-pad material. Alamdari et al (2020) investigated the performance and water consumption of evaporative-based cooler manufactured by RFX polycarbonate-structured sheet (PSS) and compared it with the metal-casing one. The assessments show about 20.6% reduction in the usage of water in RFX polycarbonate-casing cooler compared with the metallic material.…”

Section: Introductionmentioning

confidence: 99%

Assessment of direct evaporative cooler performance with a cooling pad made from banana midrib and ramie fiber

Sonawan

Sofia

Ramadhan

2020

SASBE

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PurposeThe paper aims to apply Buckingham Pi dimensional analysis method for assessing direct evaporative cooler performance with a cooling pad made of banana midrib and ramie fiber. The saturation efficiency acted as the indicator performance of the evaporative cooler.Design/methodology/approachThe paper describes an experimental study of the direct evaporative cooler with a cooling pad made of banana midrib and rami fiber. There were six parameters in the experiment: absorbed water as a dependent variable was affected by independent parameters such as air velocity and temperature, cooling pad cross-section area and thickness. Based on these variables, we arranged three dimensionless numbers and their correlation.FindingsThe paper provides three calculated dimensionless numbers plotted on a curve with a specific correlation. The curve trends for 30 mm and 50 mm pad thickness were almost similar. The range of Reynolds number for 10 mm pad was narrower than other pad thicknesses. The thicker the cooling pad, the more extensive was the calculated Reynolds number range. A new curve exhibited the relationship between the evaporation rate with the μA/t number. The broader cooling pad cross-section, the thinner pad thickness, and the lower pad temperature were factors that increased the evaporation rate, even though the increase was less significant.Originality/valueA new material in cooling pad from banana midrib fiber was tested and compared to ramie fiber and conventional cooling pad.

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Experimental Investigation of Performance of Cellulose Cooling Pad

Dũng

Hung

Chien

et al. 2022

The AUN/SEED-Net Joint Regional Conference in Transportation, Energy, and Mechanical Manufacturing Engineering

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Do non-metallic material and radiation shields affect the operation of direct evaporative cooling systems?

Cited by 10 publications

References 25 publications

Direct evaporative cooling from wetted surfaces: Challenges for a clean air conditioning solution

Direct evaporative cooling from wetted surfaces: Challenges for a clean air conditioning solution

Assessment of direct evaporative cooler performance with a cooling pad made from banana midrib and ramie fiber

Experimental Investigation of Performance of Cellulose Cooling Pad

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