Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 56 11 2025 01 20 Parametric Analysis of Energy Consumption, Sensible and Latent Performance of Two Three-Fluid Energy Exchangers: Tube- channel and Three- channel Designs Parametric Analysis of Energy Consumption, Sensible and Latent Performance of Two Three-Fluid Energy Exchangers: Tube- channel and Three- channel Designs 1517 1536 5699 10.22060/mej.2025.23643.7791 FA Samira Payan Department of mechanical engineering, University of Sistan and Baluchestan, Iran Journal Article 2024 10 27 This paper examines the feasibility of replacing a tube-channel heat exchanger with a three-channel heat exchanger in a real energy recovery system. The performance of both energy exchangers is then compared under dimensionless atmospheric conditions. In the three-fluid exchanger, a semi-permeable membrane separates the desiccant solution from the ventilation air. Moisture and heat transfer between the two fluids through this membrane, while water, as the third fluid, either absorbs excess heat or returns the lost heat to the desiccant solution. In the tube-channel heat exchanger, water flows through tubes inside the desiccant solution channel. However, in the three-channel heat exchanger, water channels are placed on both sides of the desiccant solution channel. Mass and energy conservation equations are derived and solved using the finite difference method in Fortran. The study investigates the effect of different water channel geometries on energy consumption and the efficiency of both sensible and latent heat in these energy exchangers. Results indicate that, for a mass ratio of 1, the three-channel heat exchanger shows up to 5% improvement in latent heat efficiency and 25% improvement in sensible heat efficiency compared to the tube-channel heat exchanger. Additionally, the geometric improvement coefficient is predicted to be greater than 1. This paper examines the feasibility of replacing a tube-channel heat exchanger with a three-channel heat exchanger in a real energy recovery system. The performance of both energy exchangers is then compared under dimensionless atmospheric conditions. In the three-fluid exchanger, a semi-permeable membrane separates the desiccant solution from the ventilation air. Moisture and heat transfer between the two fluids through this membrane, while water, as the third fluid, either absorbs excess heat or returns the lost heat to the desiccant solution. In the tube-channel heat exchanger, water flows through tubes inside the desiccant solution channel. However, in the three-channel heat exchanger, water channels are placed on both sides of the desiccant solution channel. Mass and energy conservation equations are derived and solved using the finite difference method in Fortran. The study investigates the effect of different water channel geometries on energy consumption and the efficiency of both sensible and latent heat in these energy exchangers. Results indicate that, for a mass ratio of 1, the three-channel heat exchanger shows up to 5% improvement in latent heat efficiency and 25% improvement in sensible heat efficiency compared to the tube-channel heat exchanger. Additionally, the geometric improvement coefficient is predicted to be greater than 1. https://mej.aut.ac.ir/article_5699_5c971edc0c2cc92fc99b5a3609450cb7.pdf