Sewer Ventilation Modeling

Lowe, Scott A.

doi:10.14796/jwmm.c415

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…It is a functional seat which suppresses the occurrence of moisture and perspiration using an electric fan to blow wind over the backrest and seat cushion. 4,5 Punching details of various designs are used to pass the wind through the leather seats.…”

Section: Introductionmentioning

confidence: 99%

Effect of punching on physical and mechanical properties of leathers: Focus on car seat covers

Roh

2019

Journal of Engineered Fibers and Fabrics

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As a lot of time is spent in the car, the comfort of not only the car seat but also the car seat cover itself has become of increasing importance. With increasing use of ventilated seats, the control of the physical and mechanical properties of leather in response to punching has become of prime importance in the design of car seats. This study evaluated the changes in the physical and mechanical properties of leather due to punching and proposes optimum punching intervals for car seats. Sixteen types of leather, punched at three spatial intervals (2, 3, and 5 mm), were evaluated in terms of their apparent density, softness, coefficient of friction, warm-cool feeling, and mechanical properties. Leather punching affected its physical and mechanical properties. However, there were differences in punching intervals that significantly affected each property, including the mechanical properties. Depending on the performance required when developing a product, a suitable punching interval must be selected. Therefore, punching at 5 mm intervals is preferred for obtaining physical and mechanical properties similar to those of untreated leathers, and punching at 3 mm intervals is recommended for achieving more softness. On the contrary, punching at 2 mm intervals increases air permeability but decreases dimensional stability.

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Section: Introductionmentioning

confidence: 99%

Effect of punching on physical and mechanical properties of leathers: Focus on car seat covers

Roh

2019

Journal of Engineered Fibers and Fabrics

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Steady air flow model for large sewer networks: a theoretical framework

Zhang

Shao

Zhu

et al. 2020

Water Science and Technology

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Modeling air movement in sewer networks is needed in order to address the issues related to sewer odor complaints and sewer corrosions due to hydrogen sulphide in sewers. Most of the existing air flow models can only be applied in small sewer networks or the trunk lines of sewer systems. The purpose of this paper is therefore to propose a theoretical approach to formulate general governing equation set for modelling steady air movement in large sewer systems. This approach decomposes the sewer system of interest into its basic physical components as pipes and nodes, builds local topology of each pipe and each node based on geographic information system (GIS) data as the fundamentals of model formulation. It avoids manually identifying each branch of sewer system, eliminates the effect of physically closed networks in sewer systems on the governing equations, and considers key sewer components and all known driving forces. The proposed approach was applied to a real sewer system with over five hundred pipes. The results show that the proposed model is applicable in modelling air movement in a large sewer system and provides a general idea of sewer gases moving through the system and its emission.

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Sewer Ventilation Modeling

Cited by 2 publications

References 8 publications

Effect of punching on physical and mechanical properties of leathers: Focus on car seat covers

Effect of punching on physical and mechanical properties of leathers: Focus on car seat covers

Steady air flow model for large sewer networks: a theoretical framework

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