May, 2007
MSc. in mechanical engineering-Thermal power

College of Engineering - Mechanical department


Jun, 1979
Bsc. Mechanical Engineering

mechanical engineering


Mar, 2019
Publication Journal
Jul, 2019
Economic Feasibility Study of Modern and Conventional Central Heating Systems for Villa Located in Duhok City, Iraq

Engineering and Technology Journal (Volume: Vol. 35, Part A, No. 7, 2017)

Abstract-This research includes the evaluation of economic feasibilities based on the Iraqi’s market cost by using three different types of central heating systems in a residential villa located in Duhok city / Iraq. It also compares between modern and conventional central heating systems. A life cycle cost analysis based on detailed heating and operation load profiles considered in this work. Initial, running and maintenance costs for three central heating systems examined for fifteen years as a working period. The used systems in this study were; modern central heating system (heat pump water heater system) and conventional central heating system (fuel oil hot water boiler system and electric hot water boiler system). Transfer function method with hourly analysis program platform (HAP4.9) used for estimation the heating loads within each zone of the project. The proposed technique of modern central heating system found to be more efficient for thermal and economic efficiencies and it uses an environmentally friendly refrigerant such as (R410A). It also works efficiently in severe cold climate with low temperature of (-20°C) in winter season. The results shows that the heat pump water heater central heating system is most efficient system, this system has provided an energy saving range up to 57.5% compared with electric hot water boiler system and 70.6% compared with fuel oil hot water boiler system

Apr, 2019
Experimental Investigation to Retrofit HCFC-22 Window Air Conditioner with R-407C


Abstract: In this paper, refrigerant R407c has been experimentally investigated to retrofit the refrigerant R22 in the existing systems. Window type air conditioner with capacity of 7.0 kW using R22 as working fluid has been selected to conduct the experimental work. The two refrigerants R22 and R407C have same operation conditions are selected in order to compare these thermal performances. The results showed that the refrigeration effect of R22 is higher than those for R407C. Consequently, the coefficient of performance COP of R407C is lower than R22. Also, the discharge temperature of the R407C is lower than those of R22. The pressure drop in the evaporator and condenser of the R407C less than those for R22. Moreover, the condensation temperature decreases along the length of the condenser coil for two refrigerants. The condensation temperatures for R22 is higher than the condensation temperatures of R407C at same ambient temperature. Finally, R407C can be considered as a suitable replacement for R22 with a slight variation in the performance with no need to change any part of the refrigeration system. Published in: 2019 International Conference on Advanced Science and Engineering (ICOASE)