TY - JOUR
T1 - Thermal field in a water body for solar energy storage and extraction due to a buoyant two-dimensional surface water jet
AU - Jaluria, Y.
AU - O'Mara, B. T.
N1 - Funding Information:
Acknowledgments--The authors acknowledge the support of the Department of Mechanical and Aerospace Engineering, Rutgers University, and of the partial support from the National Science Foundation, through Grant No. CBT-84-15364 for this work. The help provided by the Department of Mechanical Engineering, Indian Institute of Technology, Kanpur, India, in the preparation of the manuscript and in the redrawing of the figures is also acknowledged.
PY - 1989
Y1 - 1989
N2 - An experimental study on the thermal field arising in an enclosed water body being employed for energy storage, as sensible heat, due to a horizontally discharged, heated, water jet is carried out. Two-dimenional surface discharges are considered, with an outflow located at the far end of a water body, which is simulated in the laboratory by a tank of rectangular cross section. Energy loss occurs at the sides and at the top of the water body largely by convective transport and at the bottom by conduction to the ground. The study initially considers the transient behavior of the water body due to the input of thermal energy. A rapid transient, followed by a very gradual variation to an essentially steady-state temperature distribution, is observed. Experimental results are obtained in this steady regime for a water body of large extent, simulated by allowing a gradual outflow far from the inflow. The effects of the inflow conditions, aspect ration, and the position of the outflow on the resulting thermal stratification are then studied in detail. Several interesting trends are observed and related to the basic mechanisms that arise in such energy storage systems. These flows are of interest in the storage and the extraction of energy, as sensible heat, in systems such as salt-gradient solar ponds. The thermal field is important in the design of such storage systems, particularly with respect to the selection of inlet conditions and the location of the outflow.
AB - An experimental study on the thermal field arising in an enclosed water body being employed for energy storage, as sensible heat, due to a horizontally discharged, heated, water jet is carried out. Two-dimenional surface discharges are considered, with an outflow located at the far end of a water body, which is simulated in the laboratory by a tank of rectangular cross section. Energy loss occurs at the sides and at the top of the water body largely by convective transport and at the bottom by conduction to the ground. The study initially considers the transient behavior of the water body due to the input of thermal energy. A rapid transient, followed by a very gradual variation to an essentially steady-state temperature distribution, is observed. Experimental results are obtained in this steady regime for a water body of large extent, simulated by allowing a gradual outflow far from the inflow. The effects of the inflow conditions, aspect ration, and the position of the outflow on the resulting thermal stratification are then studied in detail. Several interesting trends are observed and related to the basic mechanisms that arise in such energy storage systems. These flows are of interest in the storage and the extraction of energy, as sensible heat, in systems such as salt-gradient solar ponds. The thermal field is important in the design of such storage systems, particularly with respect to the selection of inlet conditions and the location of the outflow.
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U2 - 10.1016/0038-092X(89)90024-8
DO - 10.1016/0038-092X(89)90024-8
M3 - Article
AN - SCOPUS:0024943738
SN - 0038-092X
VL - 43
SP - 129
EP - 138
JO - Solar Energy
JF - Solar Energy
IS - 3
ER -