Title: OPTIMIZATION OF A POROUS PANEL AS A FRESH AIR HEAT EXCHANGER USING RESONANCE TIME

Authors: John P. Chandler IV, Joseph J. Thalakkottor, N. Krishnan P. Veluswamy, Orian Welling , David R. Salem

DOI: 10.33599/nasampe/s.23.0191

Abstract: Porous materials have convenient properties to be used to efficiently heat fresh air for enclosed spaces in cold environments. This is done by drawing outside air with a negative interior pressure through small channels in a heated panel which in turn conducts heat into the incoming air. This study discusses the optimization of incoming air heat exchanger effectiveness while minimizing the thickness of material required. This is done by varying the angle of the channels through the panel to increase the length of the channel and therefore the resonance time of the air without increasing the thickness of the panel. Literature from the thermal sciences were used to determine the starting parameters for a porous panel. Multiphysics simulation software was used to determine the effect of varying air resonance time. Simulations were performed to determine if the simulations agreed with work done by prior literature. Simulation results showed that by increasing the resonance time of the air through the channels, the heat exchanger effectiveness can be increased without increasing the thickness of the panel.

References: [1] Taylor, B. J., & Imbabi, M. S. (2000). Environmental design using dynamic insulation. Transactions-American Society of Heating Refrigerating and Air Conditioning Engineers, 106(1), 15-28. [2] Kim, S., Lorente, S., & Bejan, A. (2007). Vascularized materials with heating from one side and coolant forced from the other side. International Journal of Heat and Mass Transfer, 50(17), 3498-3506. https://doi.org/https://doi.org/10.1016/j.ijheatmasstransfer.2007.01.020 [3] Craig, S., & Grinham, J. (2017). Breathing walls: The design of porous materials for heat exchange and decentralized ventilation. Energy and Buildings, 149, 246-259. https://doi.org/https://doi.org/10.1016/j.enbuild.2017.05.036 [4] White, F. M. (2016). Fluid Mechanics. Singapore: McGraw-Hill Education. [5] Lavine, A. S., Bergman, T. L., DeWitt, D. P., Incropera, F. P. (2020). Fundamentals of Heat and Mass Transfer. United Kingdom: Wiley. [6] Schmid. E. D., Robinson, M. J., Cross, W. M., Salem, D. R. (2019). Tensile, flexure, and compression properties of anisotropic microchannel epoxy foams, Journal of Applied Polymer Science 136 (34), 47945 [7] Schmid. E. D, Veluswamy N. K. P., Salem, D. R. (2020). Mechanical and thermal properties of microchannel insulating foams comprising a multifunctional epoxy/polyhedral oligomeric silsesquioxane nanocomposite, Polymer Composites 41 (12), 5030-5042

Conference: SAMPE 2023

Publication Date: 2023/04/17

SKU: TP23-0000000191

Pages: 8

Price: $16.00