Methodolgy to Conserve Energy in Surface Aerators

Kumar, Bimlesh and Verma, Neelam and Rao, Achanta Ramakrishna (2008) Methodolgy to Conserve Energy in Surface Aerators. In: Environmental Engineering and Management Journal , 7 (2). (In Press)

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Abstract

Based on the simulation equations, which were developed earlier (Rao, 1999 and Rao et al., 2007) relating the oxygen transfer coefficient k $(= K_{La20}(v/g^2)^{1/3})$ with theoretical power per unit volume of water $X(=N^3D^2/g^{4/3}v^{1/3})$ and k with actual power consumed by the surface aerators per unit volume $P_V(= P/(V\gamma(gv)^{1/3})$, methodology has been demonstrated to the save the energy consumption, defined by $\epsilon(=P_V /k)$, where $K_ {La20}$ is the overall oxygen transfer coefficient at $20^oC$, v is kinematic viscosity of the water, N is the speed of the rotor, D is the diameter of the rotor, P is the input power available to the rotor, V is the volume of water and \gamma is the specific weight of the water. Present works demonstrate that while aerating a given volume of water at constant rotor speed to achieve a desired oxygen transfer coefficient (k) in square tank surface aerator, it is always economical to use a single tank rather than using a multiple numbers of smaller tanks.

Item Type:	Journal Article
Publication:	Environmental Engineering and Management Journal
Publisher:	“Gh. Asachi” Technical University of Iasi
Keywords:	energy conservation;oxygen transfer coefficient;power consumption;power per unit volume;surface aerator.
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	16 Apr 2008
Last Modified:	19 Sep 2010 04:44
URI:	http://eprints.iisc.ac.in/id/eprint/13743

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