The impact of operating pressure on residential bathroom exhaust fan performance

Yin, Peng; Pate, Michael; Sweeney, James F.

doi:10.1016/j.jobe.2016.02.010

Cited by 5 publications

(3 citation statements)

References 5 publications

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“…It may also transport odors from the kitchen or toilet [3] to other rooms. To counter this phenomenon various methods are available -from complex diagnostics of the ventilation to simply adding window air inlets or chimney cowls, or installing fans that change the system from natural to mechanical ventilation [4]. But from the author's observations the most common method used by the inhabitants is to simply seal the air vent through which cold air goes into the room, further decreasing the efficiency of ventilation (also described in [5]).…”

Section: Introductionmentioning

confidence: 99%

Air Grilles Designed to Prevent Backflows in Natural Ventilation Stacks – Experimental Investigation

Koper,

Szpank

2023

Architecture, Civil Engineering, Environment

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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.

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Section: Introductionmentioning

confidence: 99%

Air Grilles Designed to Prevent Backflows in Natural Ventilation Stacks – Experimental Investigation

Koper,

Szpank

2023

Architecture, Civil Engineering, Environment

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“…They also provided revised advice on construction and design methods to improve the ventilation performance of restrooms. Yin et al [6] analyzed the influence of increasing the operating pressure of exhaust fans in restrooms. More than 80 households using alternating current (AC) motors participated in the survey.…”

Section: Introductionmentioning

confidence: 99%

Natural Ventilation of Toilet Units in K–12 School Restrooms Using CFD

Lin

2021

Energies

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In this study, the influence of architectural design parameters (the exterior window area, the wall height at a corridor-side, and the door gap of a toilet unit) on the airflow patterns and malodorous volatile substance (acetic acid) distributions within toilet units were investigated via computational fluid dynamics (CFD), with the restrooms in K–12 public schools (kindergarten through grade 12) of Taiwan as research objects. The results show that when there is a 2 m/s north wind in winter, all the cases exceed the required 12 air changes per hour (ACH), and most are above 43.75 ACH. When there is a 0.5 m/s south wind in summer, nearly half of the cases fail to reach 12 ACH. Maintaining an adequate natural ventilation rate and an acceptable level of odor pollution through passive design and architectural design is difficult. Thinking about how to improve the ventilation efficiency of toilet units with the aid of simple, appropriate, and energy-saving mechanical ventilation approaches is necessary.

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“…In Taiwan, restrooms in K-12 public schools (kindergarten (K) and the 1st through the 12th grade (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)) are frequently accessed and are open to the public, which hinders their management. In particular, restrooms that have been in service for more than 20 years often exhibit problems, such as poor ventilation, inadequate lighting, outdated layouts and designs and limited toilet spaces.…”

Section: Introductionmentioning

confidence: 99%

Natural Ventilation Effectiveness of Awning Windows in Restrooms in K-12 Public Schools

et al. 2019

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Using computational fluid dynamics (CFD), this study explores the effect of a different number of awning windows and their installation locations on the airflow patterns and air contaminant distributions in restrooms in K-12 (for kindergarten to 12th grade) public schools in Taiwan. A representative restroom configuration with dimensions of 10.65 m × 9.2 m × 3.2 m (height) was selected as the investigated object. Based on the façade design feasibility, seven possible awning window configurations were considered. The results indicate that an adequate number of windows and appropriate installation locations are required to ensure the natural ventilation effectiveness of awning windows. The recommended installation configuration is provided.

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The impact of operating pressure on residential bathroom exhaust fan performance

Cited by 5 publications

References 5 publications

Air Grilles Designed to Prevent Backflows in Natural Ventilation Stacks – Experimental Investigation

Air Grilles Designed to Prevent Backflows in Natural Ventilation Stacks – Experimental Investigation

Natural Ventilation of Toilet Units in K–12 School Restrooms Using CFD

Natural Ventilation Effectiveness of Awning Windows in Restrooms in K-12 Public Schools

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