The transfer of heat to and from process fluids is an essential part of most chemical...
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The transfer of heat to and from process fluids is an essential part of most chemical process including those in the petroleum and petrochemical industries. The principal types of heat exchangers used in process industry include (i) Double-pipe heat exchanger, (ii) Shell and tube heat exchanger, (iii) plate and frame heat exchanger, (iv) plate-fin heat exchanger, (v) spiral heat exchanger, (vi) air cooled heat exchanger, (vii) direct-contact heat exchanger and (viii) fired heaters. Your task in this project will be to design a shell and tube type heat exchanger for cooling methanol from 60°C to 30°C by integrating manual calculations with Aspen simulations. The project should be done collectively by a group (2 or 3 student members), but the contributions from each group member should be clearly identified. Each group member must have primary responsibility for a major part of the project and should contribute towards performing design calculations and generating results related to that part. Additionally, they need to contribute towards the preparation and presentation of display material (presentation) and necessary reports related to their part. Project Proposals: Approach 1 (Manual Calculations): The manual calculation approach for the design of shell and tube heat exchangers typically involves the following steps: (i) Define the heat duty: heat transfer rate (heat rate), fluid flow rates, and temperatures. (ii) Collect the required physical properties of fluids: density, viscosity, heat capacity, and thermal conductivity. (iii) Decide on the type of heat exchanger to be used. (iv) Select a trial value for the overall heat transfer coefficient (U). (v) Calculate the LMTD. (vi) Calculate the heat exchanger area required. (vii) Decide about the heat exchanger layout. (viii) Calculate the individual coefficients of heat transfer. (ix) Calculate the overall heat transfer coefficient (U) and compare it with the trial value (Step (iv)). If the calculated value differs significantly from the estimated value, substitute the calculated for the estimated value and return to step (vi). (x) Calculate the exchanger pressure drop. If unsatisfactory, return to steps (vii), (iv) or (iii) in that order of preference. (xi) Optimize the design: Repeat steps (iv) to (x), as necessary, to determine the exchanger with the smallest area that satisfies the pressure drop constraint. The transfer of heat to and from process fluids is an essential part of most chemical process including those in the petroleum and petrochemical industries. The principal types of heat exchangers used in process industry include (i) Double-pipe heat exchanger, (ii) Shell and tube heat exchanger, (iii) plate and frame heat exchanger, (iv) plate-fin heat exchanger, (v) spiral heat exchanger, (vi) air cooled heat exchanger, (vii) direct-contact heat exchanger and (viii) fired heaters. Your task in this project will be to design a shell and tube type heat exchanger for cooling methanol from 60°C to 30°C by integrating manual calculations with Aspen simulations. The project should be done collectively by a group (2 or 3 student members), but the contributions from each group member should be clearly identified. Each group member must have primary responsibility for a major part of the project and should contribute towards performing design calculations and generating results related to that part. Additionally, they need to contribute towards the preparation and presentation of display material (presentation) and necessary reports related to their part. Project Proposals: Approach 1 (Manual Calculations): The manual calculation approach for the design of shell and tube heat exchangers typically involves the following steps: (i) Define the heat duty: heat transfer rate (heat rate), fluid flow rates, and temperatures. (ii) Collect the required physical properties of fluids: density, viscosity, heat capacity, and thermal conductivity. (iii) Decide on the type of heat exchanger to be used. (iv) Select a trial value for the overall heat transfer coefficient (U). (v) Calculate the LMTD. (vi) Calculate the heat exchanger area required. (vii) Decide about the heat exchanger layout. (viii) Calculate the individual coefficients of heat transfer. (ix) Calculate the overall heat transfer coefficient (U) and compare it with the trial value (Step (iv)). If the calculated value differs significantly from the estimated value, substitute the calculated for the estimated value and return to step (vi). (x) Calculate the exchanger pressure drop. If unsatisfactory, return to steps (vii), (iv) or (iii) in that order of preference. (xi) Optimize the design: Repeat steps (iv) to (x), as necessary, to determine the exchanger with the smallest area that satisfies the pressure drop constraint.
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SOLUTION Project Proposal Design of a Shell and Tube Heat Exchanger for Cooling Methanol Introduction The objective of this project is to design a shell and tube heat exchanger for cooling methanol fr... View the full answer
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