25-08-2017, 09:32 PM
Abstracts: The design of a heat exchanger is referred to as the sizing problem. To be more elaborate it means that a heat exchanger is designed for construction type, flow arrangement, tube and shell material, and physical size of an exchanger to meet the specified heat transfer and pressure drop. For designing the heat exchanger the specified data, a systematic iterative procedure is carried out to find out the design data which will be utilized to construct a 3D model in modelling software and will be analyzed for safe working in analysis software along with a CFD analysis. In the previous report the authors have defined the problem to design a heat exchanger of shell and tube type to heat the mixture of Ethyle Benzene and styrene from 10oC to 90oC using steam. To serve this purpose a design of Single pass heat exchanger was presented derived using Kerns iterative procedure. That design was again validated using Ansys analysis software in thermal and structural modules. In the present work the authors have presented another design of double pass heat exchanger carrying out same procedure and other analysis using 3D models. Besides this a Computational Fluid Dynamics analysis is carried out to witness the actual change in temperature and velocity variation. After critically analyzing the two designs it can be conclude that the single pass design is more viable then the double pass design, as the pressure drop in double pass model in spite of being in allowable range, it is higher than that for single pass design. It can be concluded that using first design a lot of material can be saved using single pass design.