TY - JOUR
T1 - Experimental investigation on the humidification parameters of the reciprocating multistage evaporative Cooler-A novel approach
AU - Kumar, Shiva
AU - Reddy, S. V.Kota
AU - Salins, Sampath Suranjan
N1 - Funding Information:
Authors are thankful to the lab support provided by the School of Engineering & IT, Manipal Academy of Higher education, Dubai, UAE.
Publisher Copyright:
© 2022 Elsevier Masson SAS
PY - 2022/7
Y1 - 2022/7
N2 - Humidification-dehumidification technology is one of the most economical techniques to fulfill cooling needs. The current work focuses on designing and constructing a novel reciprocating packing humidification system, where four packings are placed in four different slots and operated by a cam follower mechanism. Inlet operating parameters such as air velocity and camshaft rotation are varied to determine the influence on the outlet parameters such as energy conversion rate, energy conversion factor, humidification efficiency, and specific cooling capacity. The reciprocating multistage evaporative cooler performs better than the single-stage cooler with superior values for the performance parameters. With the increase in the camshaft speed, there is a reduction in the energy conversion factor (ECF), humidification efficiency (HE), and evaporation rate (ER). An increase in air velocity increases ER, ECF and decreases HE. The highest humidification efficiency is 72.6%, and the ECF achieved is 2.9, corresponding to an air velocity of 5.6 m/s and a camshaft speed of 10 rpm. Comparison with conventional VCR-based cooling techniques reveals that 7% of energy can be saved using a multistage evaporating cooling device. Sensitivity analysis reveals that the air flow rate is more significant than the camshaft rpm influencing the output responses. Operating parameters have been optimized to attain enhanced performance from the multistage reciprocating cooler. The results indicated that maintaining the air velocity of 5.3–6 m/s and the camshaft speed of 16–18 rpm improves the overall performance of the evaporative cooler with reasonable energy consumption.
AB - Humidification-dehumidification technology is one of the most economical techniques to fulfill cooling needs. The current work focuses on designing and constructing a novel reciprocating packing humidification system, where four packings are placed in four different slots and operated by a cam follower mechanism. Inlet operating parameters such as air velocity and camshaft rotation are varied to determine the influence on the outlet parameters such as energy conversion rate, energy conversion factor, humidification efficiency, and specific cooling capacity. The reciprocating multistage evaporative cooler performs better than the single-stage cooler with superior values for the performance parameters. With the increase in the camshaft speed, there is a reduction in the energy conversion factor (ECF), humidification efficiency (HE), and evaporation rate (ER). An increase in air velocity increases ER, ECF and decreases HE. The highest humidification efficiency is 72.6%, and the ECF achieved is 2.9, corresponding to an air velocity of 5.6 m/s and a camshaft speed of 10 rpm. Comparison with conventional VCR-based cooling techniques reveals that 7% of energy can be saved using a multistage evaporating cooling device. Sensitivity analysis reveals that the air flow rate is more significant than the camshaft rpm influencing the output responses. Operating parameters have been optimized to attain enhanced performance from the multistage reciprocating cooler. The results indicated that maintaining the air velocity of 5.3–6 m/s and the camshaft speed of 16–18 rpm improves the overall performance of the evaporative cooler with reasonable energy consumption.
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U2 - 10.1016/j.ijthermalsci.2022.107539
DO - 10.1016/j.ijthermalsci.2022.107539
M3 - Article
AN - SCOPUS:85125865482
SN - 1290-0729
VL - 177
JO - Revue Generale de Thermique
JF - Revue Generale de Thermique
M1 - 107539
ER -