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http://dx.doi.org/10.6110/KJACR.2017.29.8.419

Analysis of Amount of Energy Loss for a Dock System in the Cold Distribution Center  

Yang, Sungjune (Department of Mechanical Engineering, Sungkyunkwan University)
Kim, Youngjoo (Logistics Systems Research Division, Korea Railroad Research Institute)
Hur, Jun (Logistics Systems Research Division, Korea Railroad Research Institute)
Kim, Teasung (Department of Mechanical Engineering, Sungkyunkwan University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.29, no.8, 2017 , pp. 419-428 More about this Journal
Abstract
In this study, energy loss due to ventilation load in the dock system was analyzed through simulation. Also, flow generated in the dock system of the warehouse was measured using manufactured measuring devices. Numerical simulation was conducted by simulating the most common picking tasks by examining the actual working environment. Incompressible and unsteady turbulent flows were assumed, and the turbulence model was the k-e standard model. Proper grid was selected through grid dependency test. Measurement was conducted using Honeywell and Vaisala sensors, and flow and temperature inside the warehouse were measured and compared with simulation results to validate simulation. When comparing amount of loss occurring in two hours and amount of loss occurring in 15 minutes, docking time of the former was eight times longer but energy loss was 3.8 times lower. Ventilation load occurring during the initial period after opening docking system accounted for a large proportion of total ventilation load. Also, comparing the load when the dock was closed and the load when the truck was parked, ventilation load was significantly higher than load due to heat conduction from the wall. Therefore, in improving the docking system, it is effective to reduce the gap by improving compatibility of the docking system and truck, rather than wall material.
Keywords
Cold distribution center; Numerical analysis; Energy Loss;
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