Heat Loss Parametric Study on Laminar Flow in a 3-Dimensional Rectangular Heating Duct in Cold Weather

Abstract:

Heat losses from heating air ducts underground are used in many applications such as heating and air conditioning in cold weather. Researchers worked on heat losses to understand different ways to reduce heat losses to the environment. This project studies a 3-dimensional model of heating rectangular duct in cold surroundings. The model was done numerically. The numerical grid was tested to reach a reasonable approximation and a comparison with correlations from literature showed good agreement. Moreover, parametric study was carried out to study the effect of different parameters on heat losses. These parameters were Inlet velocity V_o, Inlet temperature T_o, outer heat transfer coefficient h_o, and surrounding temperature T_∞. Results showed that higher inlet velocity, inlet temperature, and outer heat transfer coefficient increases the total heat loss to the surroundings while higher surrounding temperature decreases the total heat loss to the surroundings.

• Periodical: Applied Mechanics and Materials (Volume 935)
• Pages: 33-40
• DOI: https://doi.org/10.4028/p-7kSdj0
• Online since: April 2026
• Authors: Abdullatif A. Gari*
• Keywords: Heat Loss, Heating and Cooling, Laminar Flow, Parametric Study, Rectangular Duct

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