RT info:eu-repo/semantics/article
T1 Experimental performance of a new mixed-flow two-stage regenerative indirect evaporative cooler
A1 Tejero González, Ana
A1 Andrés Chicote, Manuel
A1 Velasco Gόmez, Eloy
A1 Urso, Alessandra
A1 Costanzo, Vincenzo
A1 Evola, Gianpiero
A1 Nocera, Francesco
K1 Dew Point Indirect Evaporative Cooler
K1 Multiple stage
K1 Experimental characterization
K1 Thermal effectiveness
K1 Cooling capacity
K1 3328 Procesos Tecnológicos
AB Evaporative cooling can improve energy efficiency in buildings; however, the air supplied to indoor spaces maybe excessively humid or not cool enough to ensure thermal comfort. To overcome this, Indirect EvaporativeCoolers maintain a constant humidity ratio at the product airstream, and regenerative airflow configurationsallow cooling below the inlet air’s wet bulb temperature. Such devices rely on the well-known Maisotsenko cycleand are often referred to as Dew Point Evaporative Coolers, as they can ideally reach the dew point temperatureof inlet air. This work proposes a mixed-flow prototype that combines the superior thermal performance ofcounter-flow designs with the compact size of cross-flow systems. The heat exchanger is made of polycarbonateplates, while water distribution is optimized thanks to outlet nozzles and a wicking material placed on the wetside of such plates. The device has a volume of 0.025 m3 and supplies 40 l/s of cooled air, achieving a coolingcapacity greater than 325 W under inlet air conditions of 40 ◦C and 30 % relative humidity, with a waterconsumption of 1.9 l/h. Experimental results demonstrate that increasing the inlet dry bulb temperature anddecreasing the inlet air relative humidity significantly improve temperature drop and cooling capacity, thoughthey have a limited effect on the thermal effectiveness. Compared to a previous one-stage prototype, the two-stage configuration increases the temperature drop and both the wet bulb and dew point effectiveness byabout 50 %. However, the cooling capacity barely improves less than 17 %, due to the use of part of the productair as working air.
PB Elsevier
SN 0378-7788
YR 2025
FD 2025
LK https://uvadoc.uva.es/handle/10324/79840
UL https://uvadoc.uva.es/handle/10324/79840
LA eng
NO Energy and Buildings, 2025, vol. 348, p. 116431
NO Producción Científica
DS UVaDOC
RD 19-nov-2025