فاطمه ايماني بيدگلي

Today, the design and optimization of heat exchangers has been of great interest due to the reduction of energy consumption. One of these heat exchangers is compact heat exchangers that are divided into two types of rotating and stationary. In this thesis, a comparison of thermal modeling and heat exchanger optimization of a stationary plate fin with conical blades and an unregulated wave rotating heat exchanger located in an air conditioner for a research sample (a restaurant with a given regional climate) . Because of the air conditioning research area (the restaurant), the humidity parameter, and consequently the latent heat transfer (in addition to the sensitive heat transfer), is very important and important in designing and modeling the heat exchanger. For thermal modeling, the ε-NTU design method has been used. In the stationary exchanger, the parameters of the blade height, the blade stroke, the length of the blade, the cold flow length, the flow current and the length of the next without flow, and in the rotary exchanger, the percentage of the flow of heat on the plate 360 degree flow, the diameter of the matrix, the thickness of the matrix, Matrix provider, rotary speed and matrix porosity coefficient are considered as design parameters in modeling and optimization. The multi-objective optimization method is implemented using genetic algorithm to optimize two objective functions, maximum efficiency and minimum volume. The results of optimal design are a set of optimal responses that are called Pareto's answers. To select the best answer from the Pareto Front, the LINMAP selection method has been used. The results of all these are the fixed plate fan heat exchanger with conical blades with an efficiency of 93% and a volume of 0.64 cubic meters, and a rotating exchanger with an efficiency of 95% an‎d a total volume of 1347.0 cubic meters. According to the obtained values, the use of rotary exchangers is more cost-effective due to higher efficiency. Sensitivity analysis has been performed due to incremental changes and a decrease in the thermal power parameter to the exchanger, and the results have been presented.