Dimensionamiento de un intercambiador de calor | | UPV

Title: Sizing a Heat Exchanger Description: Galindo Lucas, J. (2010). Sizing a Heat Exchanger. http://hdl.handle.net/10251/7609 Auto-description: This video explains the sizing process for heat exchangers using the logarithmic mean temperature difference (LMTD) technique. It begins with an introduction to the most common types of heat exchangers, highlighting shell and tube and plate types, and the possible flow configurations such as cocurrent, countercurrent, and crossflow. Key design equations are detailed: the heat balance for the fluids and the heat transfer equation. Due to the variability of the temperature difference between flows along the exchanger, the need to calculate a LMTD is described. To accurately calculate the DTML, the integral of the temperature difference across the exchanger is introduced, and it is explained that this calculation depends on the flow orientation. For example, in the case of countercurrent flow, the DTML can be obtained analytically, and its mathematical expression involves logarithms due to the exponential nature of temperature curves. The video addresses the complexity of calculating the DTML for configurations other than pure cocurrent or countercurrent flow, such as cross-flow or multi-pass exchangers. In these cases, a correction factor, obtained from graphs or tables, is often used to adjust the estimated DTML. An example is given of how to use the DTML in calculating the required area of an exchanger for design, highlighting the importance of knowing the inlet and outlet temperatures of both fluids. Finally, it is summarized that the DTML varies depending on the exchanger configuration and that for types other than cocurrent or countercurrent, applying a corrective factor is essential. It is concluded that the DTML method allows determining the required area for a heat exchanger based on the design parameters of the fluids involved. Author: Galindo Lucas José Universitat Politècnica de València UPV: https://www.upv.es More videos at:    / valenciaupv   Access our MOOCs: https://upvx.es #Heat exchangers #Heat transmission #Log mean temperature difference #THERMAL ENGINES AND MACHINES