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The heat pumps system is one of the most remarkable system that is widely used around the world, their capacity is different according to necessity. The energy consumption in those systems will limit their effectiveness. This study will try to prove the positive reactance of the new changes (the additional heat exchanger) on the heat pump work, where the power consumption will reduce about (13-17%). The study includes the experimental results of the laboratory model, which has been manufactured in the laboratories of the technical college of Mosul/Northern technical university-Iraq. The model consists of the heat pump that was improved by using the additional heat exchanger, its duty is to heat the refrigerant before entering the compressor, by using solar energy. The results of this work prove the positive effect of the additional heat exchanger, on the coefficient of performance of the heat pump, in both modes of heating and cooling. The conclusions are useful to the industries that deal with heat pumps.

This study intends to analyse the generated individual output energy by different types of wind turbines. Focusing on estimating the total energy output generated by a wind farm utilizing three distinct wind turbines, Siemens Gamesa SG 3.4-132, Vesatas HTq V126, and Lagerwey L100, with rated powers of 3.465MW, 3.45 MW, and 2.5 MW respectively. Sixty turbines of each type will be installed at the elevations of 97 m, 87 m, and 99 m consecutively. For the purpose of the study, the Sorochi Gory region was chosen as an eligible location to the farm, due to its physiographic location and desirable forestry. A virtual experiment will be conducted, by testing different possible wind turbines configurations, and calculating their gross energy output, considering the output wind speed is in the ideal case, while the output energy includes the wake effect, using (WindFarmer analyst software). Thereupon, the results will be presented, including the optimal wind turbine configuration for the wind farm, in terms of efficiency, stability, and economy wise. Doi: 10.28991/HEF-2020-01-04-03 Full Text: PDF