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Articles by K. Manohar
Total Records ( 4 ) for K. Manohar
  K. Manohar and A.A. Adeyanju
  Energy is one commodity on which the provision of goods and services depend. Its availability and consumption rate is an economic index to measure the development of any community. In Nigeria, there is a limitation to power supply from the National grid which has adversely affected the economic and social development of the populace. This really necessitates the need for decentralized power source as a viable alternative to which hydro power schemes readily fits in. Major rivers and dam’s development provide an enviable energy potential for the exploitation of hydro energy in Nigeria. This study presents analysis of hydro power as renewable energy resource potentials in Nigeria with the status of the database including its adequacy and gaps. A detailed analysis of the technical and technological assessment, present demand and supply situation is also made.
  A.A. Adeyanju and K. Manohar
  Various types of energy storage techniques are reviewed and their performances in storing energy compared in this study. Water storage systems required very large volume for large heat storage capacities and corrosion problem for long operation periods. There is also stratification problem and due to this controls are required. Scale formation is another problem with such systems. With packed-bed storage there is no corrosion or scale forming problem but volume of the system might increase with an increase in cost. On the other hand, by the use of phase change storage systems, large volumes required by the other two types are eliminated because of the bond interaction of the storage material and the container, storage material looses its energy storage characteristics after a period of time.
  A.A. Adeyanju and K. Manohar
  An experimental study on the thermal and mechanical properties of steel-fiber-reinforced concrete for solar/thermal energy storage purposes is presented in this report. It takes into account the results of measurements of thermal conductivity, thermal resistivity, thermal diffusivity and the results of compressive strength as well as thermal energy storage calculated from the knowledge of the above measured parameters. The Experimental testing method is described as well based upon the linear heat source theory, it requires the use of a special probe to be inserted into the sample. The experimental programme was forwarded to test concrete aggregate mixtures with three different sizes of steel fibers and one plain concrete. The measurements were carried out from the pouring time of cubic samples and were ended up when hardened conditions were achieved. The results indicate that the steel fibers have influence on the thermal properties of the concretes tested.
  A.A. Adeyanju and K. Manohar
  The review of heat transfer in packed beds has been carried out with the emphasis on both experimental and theoretical techniques. It is observed that the two major modes of heat transfer, namely, conduction between the particles in the bed and convection between the flowing fluid and the particles, interact with each other. Also, in the designing of packed bed for thermal energy storage application the Biot number should be kept as low as possible so that the thermal resistance within the solid does not become dominant.
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