Air grilles designed to prevent backflows in natural ventilation stacks - experimental investigation

• Autorzy: Koper Piotr , Szpank Dominik

Identyfikatory

DOI

10.2478/acee-2023-0025

• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of the experimental research on the air grills designed to stop backflows in natural ventilation stacks. For each grill pressure drop was measured for different airflow rates, in both flow directions. Two ∅ 100 mm grills working on different principles were tested: one with moving flaps, and one shaped in a way that should greatly increase the hydraulic losses during backflow. For comparison, the ordinary air grill was also tested. The results show that the grill with moving flaps works as intended. With only slightly higher hydraulic losses in the forward direction compared to ordinary grill, it shuts off the backflows almost completely. The other, diffuser-shaped grill doesn’t work as intended. It has very high hydraulic losses in both directions, and the effect of changing the air resistance with the reverse flow is barely noticeable.

Słowa kluczowe

EN

natural ventilation; backflow; hydraulic losses; air grill; air diode

PL

naturalna wentylacja; przepływ wsteczny; straty hydrauliczne; grill powietrzny; dioda powietrzna

• Wydawca: Silesian University of Technology
• Czasopismo: Architecture Civil Engineering Environment
• Rocznik: 2023
• Tom: Vol. 16, no. 2
• Strony: 161--169
• Opis fizyczny: Bibliogr. 16 poz.

Twórcy

autor

Koper Piotr

• Assistant Prof.; Silesian University of Technology, Konarskiego 20, 44-100 Gliwice

autor

Szpank Dominik

• Student; Silesian University of Technology, Konarskiego 20, 44-100 Gliwice

Bibliografia

• [1] C. Dimitroulopoulou, (2012). Ventilation in European dwellings: A review. Building and Environment 47, 109–125.
• [2] Ciuman Piotr, Palmowska Agnieszka, Palian Piotr, Tompór Artur, Niedbała Karol, Olekszyk Oskar, Krasnodębska Kamila, (2022). Investigation of thermal and humidity conditions and air quay in the university computer laboratory. Instal 12, 26–32.
• [3] Alberto Meiss, Miguel A. Padilla-Marcos and Jesús Feijó-Muñoz, (2017). Methodology Applied to the Evaluation of Natural Ventilation in Residential Building Retrofits: A Case Study. Energies 10, 456.
• [4] Peng Yin, Michael B. Pate, JamesF. Sweeney (2016). The impact of operating pressure on residential bathroom exhaust fan performance. Journal of Building Engineering 6, 163–172.
• [5] Joanna Ferdyn-Grygierek (2019). Andrzej Baranowski, Monika Blaszczok and Jan Kaczmarczyk: Thermal Diagnostics of Natural Ventilation In Buildings: An Integrated Approach. Energies, 12, 4556.
• [6] Yan Wu, Jianlei Niu (2016). Assessment of mechanical exhaust in preventing vertical cross household infections associated with single-sided ventilation. Building and Environment 105, 307–316.
• [7] Guohui Gan, (2010). Interaction Between Wind and Buoyancy Effects in Natural Ventilation of Buildings. The Open Construction and Building Technology Journal, 4.
• [8] Haihua Zhang, Dong Yang, Vivian W.Y. Tam, Yao Tao, Guomin Zhang, Sujeeva Setunge, Long Shi: (2021). A critical review of combined natural ventilation techniques in sustainable buildings. Renewable and Sustainable Energy Reviews, 141, 110795.
• [9] G. Papadakis, M. Mermier, J.F. Meneses, T. Boulard, (1996). Measurement and analysis of air exchange rates in a greenhouse with continuous roof and side openings, J. Agric. Eng. Res. 63(3), 219–227.
• [10] T. Liu, W. L. Lee, (2020). Evaluating the influence of transom window designs on natural ventilation in high-rise residential buildings in Hong Kong, Sustain. Cities Soc. 62, 102406.
• [11] Romana Antczak-Jarząbska, Maciej Niedostatkiewicz (2020). Application of the chimney cap as a method of improving the effectiveness of natural ventilation in buildings. Polish Maritime Research, 3, 168–175.
• [12] Magdalena Nakielska, Krzysztof Pawłowski (2017). Increasing natural ventilation using solar chimney. E3S Web Conf., 14, 01051.
• [13] Zhixiang Cao, Tongtong Zhao, Yi Wang, Hongyu Wang, Chao Zhai, Wenchao Lv, (2020). Novel fluid diode plate for use within ventilation system based on Tesla structure. Building and Environment 185, 107257.
• [14] Hong Hu, Hideki Kikumoto, Bingchao Zhang, (2022). A numerical study on natural ventilation promotion and control in experimental house with fluid diode window. E3S Web of Conferences 356, 03043.
• [15] Tomasz Klinke, (2012). Wentylacja – tablice do obliczeń strat ciśnienia (Ventilation – tables to calculate pressure losses). Oficyna Wydawnicza Politechniki Warszawskiej, Warszawa.
• [16] http://www.sensor-electronic.pl/pdf/KAT_AirDistSys5000.pdf. Access: February 2023.