Efficiency of cross-flow vs stack-assisted natural ventilation for exhausting cooking fumes and odours in apartment kitchens

Date

2025-4-08

Author

Sungun, Ceren Gül

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

80
views

0
downloads

Cite This

Ventilation shunt flues in apartment kitchens utilise the principle of natural convection, with rising warm air playing a critical role. Apartment kitchens are designed for mechanical ventilation during cooking using a kitchen hood connected to a shunt flue. However, in apartments, air pressure variations caused by the stack effect or reverse stack effect lead to airflow between the shunt flue and the connected spaces. The heat load generated by cooking induces airflow between the kitchen and the shunt flue, affecting even the kitchens on floors where cooking is not taking place. In this study, without operating the kitchen hood, a 10-story apartment building—with natural gas stoves used for cooking on all floors—was analysed. The airflow between the shunt flue and the kitchen was examined for each floor, taking into account that a horizontal flue system was designed for every floor. The buildings were oriented toward both leeward and windward directions. The performance of cross-flow natural ventilation on horizontal flue, as well as stack-assisted natural ventilation through the shunt flue, was investigated in these apartment kitchens—particularly regarding the exhaust of cooking fumes and odors. The analysis was conducted using the Apache Dynamic Simulation tool and MicroFlo CFD within the IES VE (Integrated Environmental Solutions Virtual Environment) program, incorporating climate data from Ankara. CO₂ emissions from cooking were employed as an indicator to evaluate indoor air quality, and the analysis indicated no significant difference between kitchens with vertical or horizontal flue configurations. Ventilation effectiveness was assessed using the Local Mean Age of Air, revealing that air in kitchens with a horizontal flue was refreshed more rapidly than in those with a vertical flue.

Subject Keywords

Apartment kitchen, Cross-flow ventilation, Stack effect, Cooking fumes, IES VE

URI

https://hdl.handle.net/11511/114599

Collections

Graduate School of Natural and Applied Sciences, Thesis