This paper presents valuable potential savings from fuel and financial expenses of a steam boiler being studied at Elkhmus power plant, Libya. For this research, a visual basic program was developed and being applied for analyzing the gathered data. Key findings pointed to an acceptable level of savings throughout the entire operations within the studied section of the power plant. The highest level of findings was found to be the increasing of thermal gain along with the total efficiency of the boiler as a result of using the exhaust temperature for heating-up the feed water to the boiler. It was clearly found that the increase of the total efficiency has a direct impact on saving the amount of consumed fuel, and thereby the financial expenses were saved by an average of about 11.6% arabic 16 English 78
Rajab HOKOMA, Nabil M. Muhaisen, Omran Alshogi(1-2014)

Abstract In spite of their widely-spread use across the globe, the domestic solar water heaters are still subject to essential, technical difficulties that need to be deeply studied. Such technical impediments are latent in how appropriate to each other the different, mutually-dependent components of the system are; and how appropriate they are to the prevailing meteorological conditions of the application site which is still under research and development. This thesis presents a clear-cut, straightforward mathematical model that determines the basic factors influencing such systems, and, in specific, discusses the optimum design month as well as the optimum tilt angle of the solar collector, bearing in mind the contribution of the energy obtained to meet the targeted load. Furthermore, the study considers the required thermal capacity that should be provided by the solar collector. To avoid assumptions that could be unjustified in practice, and to get as precise results as possible, the study was thoroughly based on normalized mathematical parameters. In the case where the total demand for energy used in water heating is to be fully satisfied by the solar energy system, provided that the required temperature of the heated water is 45oC and consumption is 100 (litre/day) per person for a given house, the results of the study concluded that according to the climate information of Tripoli city, 32.68°N latitude, the optimum design month is December, the optimum tilt angle is 75°, and the solar collector area fulfilling the following specifications: Glazed type, Fr () = 0.58, and Fr UL= 4.00 (W/m2oC) is 2.83 square meters. On the other hand, the results suggest an optimum tilt angle of 50°, which is the same angle obtained by the traditional technique, and solar collector area of 1.6 square meters if up to 80% of demand is to be covered by solar energy.
علاء بلقاسم العلوني (2010)

In this paper, an orthopedic robot-assisted drilling system is presented. The system consists of a six degree of freedom robot manipulator equipped with a multi axis force/torque sensor and an electrical drilling tool attached to the robot end-effector. The purpose of the system is to enable the orthopedic surgeons to drill the patient bone using the robot manipulator and automatically detect the bone breakthrough during bone fixation process. The breakthrough is detected by measuring the forces acting on the drilling tool tip. This will reduce/eliminate the need for X-rays imaging used in traditional bone fixation. The system has been tested on sheep bone. The result has shown that, the bone drilling operation can be handled by a robot manipulator to improve the quality of the drilling operation. With this system, the bone breakthrough can be easily detected and further damage of the healthy patient tissue would be avoided. This will lead to fast patient recovery and short hospital stay.
Azeddien Kinsheel, Zahari Taha, J. Lee(1-2008)