TY - JOUR 
A1 - Lucas Miralles, Manuel
AU - Martínez Martínez, Pedro
AU - Sánchez Kaiser, Antonio
AU - Viedma Robles, Antonio
AU - Zamora Parra, Blas
T1 - Water drop size numerical optimization for hydrosolar roof
Y1 - 2002
UR - http://hdl.handle.net/10317/8652
AB - Air-conditioning systems of buildings and other industrial facilities commonly use water as a heat drain to
remove heat from refrigerant condensers. Classical solutions to reduce the temperature of this service water are
air cooled heat exchangers or mechanical draught cooling towers. The Hydrosolar Roof optimized in this paper,
working as a heat focus in the thermodynamic cycle of a heat pump, achieves the same objectives without fan
energy consump tion. This system consists of an extended framework on the roof of the building with some
thermal plates installed over it. Some of the plates are made of a high reflective material, and the others are made
of absorbent material. The Hydrosolar Roof uses the design of the reflective and absorbent parts of the device,
made of flat plates, to form a sloping channel. Solar radiation is collected by this channel and, due to local
heating in this zone, natural convection through it is produced. The natural induced air flow is irrigated with
water sprays, placed below the plates at the inlet of the channel, generating a cross flow between air and water.
In this way, water is cooled by direct contact with a reduced amount of vaporization, and most of the water is
recovered at a reduced temperature. This work shows the numerical study to obtain an optimum for the sprayed
water drop size. The two-dimensional version of the CFD code Fluent was applied to predict both atmospheric
air and sprayed water main variables in a real geometry and under different thermodynamic conditions.
KW - Mecánica de Fluidos
KW - Drop size
KW - Air-conditioning
KW - Solar chimney
KW - Cooling tower
KW - Solar energy
KW - 2106.01 Energía Solar
KW - 3309.95 Transmisión de Calor en Refrigeración y Calefacción
LA - eng
PB - ISES
ER -