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The shear capacity of masonry-infilled reinforced concrete (RC) frames is determined experimentally by testing of five 2/3 scale, one story, one bay infilled RC frame specimens with varying degrees of separation between upper and lower portions of the masonry infill panel. The main premise of this experimental study was to find the contribution of masonry panel in global resistance of infilled RC frames versus shear force. Based on the experimental results, a new method is proposed for the determination of the shear resistance and the contribution of the masonry infill panel is derived. Comparisons of experimental and analytical results show that the proposed method for evaluating the shear resistance of the masonry panels offers a promising approach for the design of infilled RC frames. Furthermore, the results of this study indicate that the shear resistance of masonry panel in infilled RC frames is strongly influenced by the stiffness and lateral resistance of the RC frame.

As a result of longer term exploitation, exposure to severe weather conditions or influence of chemical conditions, concrete walls of concrete structures get damaged internally as well as externally. This study includes a preliminary analysis of chemically treated water in existing concrete structures, and another after the application of the method and using materials for the structures in future. One of the priorities was to examine the existing concrete structures by using nondestructive and destructive methods. After that, based on the results of the analysis, adequate new materials are proposed for the repairs, most commonly new technology polymer carbonated materials, in order to achieve durability of structure elements in using technological processes. Behavior of the repairing structures was tested using the in situ methods, and especially pull-of test, to verify the adhesion force between the old concrete structures and new applied layer. After the repairing, the concrete structures will be monitored to record the behavior under the chemical treated water.

In an energy audit, the main goal is to achieve energy savings, identify opportunities for savings, the measures for saving energy efficient, prepared the report on energy saving measures. The energy auditis aimed adequate knowledge on the current state of energy consumption in buildings and identify opportunities in energy consumption and cost effective reporting of results. The data to be analyzed are: energy bills (electricity, fuel) for the audit period, for the last three years (and/or next year), building plans and studies and its energy installations electromechanical characteristics building/structure and operation of the apparatus/equipment basic climate data for the period in which the auditis being done. This paper will present an analysis of the overall energy audit standard for residential dwellings in Pristina

Heat exchangers are devices in which heat is transferred from one fluid to another fluid as a result of temperature difference. Heat exchanger presented in the current paper in which inside the tubes flows water, but outside the tubes flows air aims to enable cooling of circulating water, which serves to cool the engine of a machine. Such exchangers find application in the automotive industry as well as heating and cooling equipment and HVAC systems etc. The surface of the heat exchanger by the air side always tends to be much larger using surface fins in order to facilitate equalization of thermal resistance for both sides of the heat exchanger, because the rate of transmission of heat from the water side is much greater. Furthermore, the paper will present analytical and experimental studies involved for determination of performance of plate-fin heat exchanger for various flows of working fluids in order to get the highest values of performances i.e.: overall heat transfer coefficient U, efficiency of heat exchanger ɛ, maximal and real heat transferred, pressure drop, air velocity and Reynolds number from the air side of heat exchanger etc. The present scientific paper is based on the fact that from the experimental model made for laboratory conditions, conclusions are derived that can be used during installation of such heat exchanger on certain machines in order to predict their performance.