Current Design of High-Rise Building Drainage System in Taiwan - Paper

Oct 29, 2026

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Research aims to address drainage performance issues in high-rise buildings by observing existing systems and conducting a fundamental study of stack fluid mechanisms. The study reviews prior design methodology and derives solutions to practical drainage problems. Results also explore how air-pressure distribution in the stack can be applied to predict and improve drainage behavior, with attention to negative and positive pressure effects across building floors.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages17

Reading Time43 min

AccessFree to download

Abstract

Introduction

Mechanism and Theoretical Reviews

SYMPOSIUM CIB W62 2004 CSTB, France Current Design of High-Rise Building Drainage System in Taiwan (1)C.L. Cheng, Dr. (2)W.H. Lu, Mr. (3) K.C. Ho, Mr. [CCL@mail.ntust.edu.tw](CCL@mail.ntust.edu.tw)[ ](CCL@mail.ntust.edu.tw)[sammy@abri.gov.tw](sammy@abri.gov.tw)[ ](sammy@abri.gov.tw)[quenchhu@hotmail.com](quenchhu@hotmail.com) National Taiwan University of Science and Technology, Department of Architecture, 43 Keelung Road Sec.4, Taipei, Taiwan, R.O.C. Abstract The main purpose of the research is to find the solution of drainage issues in high-rise building through the observation and basic study of stack fluid mechanism. Firstly, we will investigate the existing high-rise buildings and summarize the design methodology from our previous researches. Through the observations and reviews, this paper would conclude the solutions for existing drainage problems and the theory of air pressure distribution in stack of high-rise building may be applied. Keywords high-rise buildings, drainage, stack, air-pressure, methodology 1. Introduction Since 1985, Tai-power office building that is the first domestic building above 100 meters was constructed, high-rise building evidently appeared to the metropolis area of Taiwan from north to south. Moreover, Taipei 101 is seen as the milestone of high-rise building. The design of high-rise building is complex and high integration work and the success reveals the technical achievement of a country. Nonetheless, the importance of building drainage, which is a humble but very substantial issue, might not be ignored. The gravity drainage system without any energy supply is commonly used in building all over the world, and the trap with simple structure is also preferred to set as a critical part for most of sanitary facilities because of its easy elimination of stench and vermin. Owing to the increasing of potential energy of height, inappropriate design of drainage system is facile to cause the sanitary problems in high-rise building and inconvenient utility. Particularly, people recognize the importance of healthy environment through the impact of SARS disease. The community infections of Hong Kong give us a great lesson that the problems of drainage system including the infectious disease caused from loss of seal water in trap, and we should not ignore the hidden troubles of building drainage. In order to improve the drainage performance of existing high-rise building, investigation is necessary and appropriate design technology of domestic application must be conducted. The main purpose of the research is to find the solution of drainage issues in high-rise building through the observation and basic study of stack fluid mechanism. Firstly, we will investigate the existing high-rise buildings and summarize the design methodology from our previous researches. Through the observations and reviews, this paper would conclude the solutions for existing drainage problems and the theory of air pressure distribution in stack of high-rise building may be applied. 2. Mechanism and Theoretical Reviews Appliance discharges to a vertical stack of drain may be described as unsteady or time dependent flow, and the form of the appliance discharge flow contributes to this flow condition. An actual discharge of vertical drainage stack has a complex phenomenon and may consist of triple phase flow feature with incorporated solid, liquid and air. Airflow in the drainage stack is promoted by through-flow mixing as well as the interaction of friction with the falling water and air. This mechanism causes the negative pressure on the upper floors and the positive pressure on the lower floors in the building vertical drainage system. According to the previous researches, the airflow rate (Qa) was identified as a critical parameter for a prediction model which can express the mechanism of vertical drainage flow. Therefore, the airflow performance in vertical drainage stack is the dominated issue

FAQs

What is the main purpose of the research?

To find solutions for drainage issues in high-rise buildings by observing existing systems and studying stack fluid mechanisms.

What mechanism is analyzed for vertical drainage stacks?

The discharge flow to a vertical stack is treated as unsteady/time-dependent and involves interactions between falling water and airflow, producing negative pressure on upper floors and positive pressure on lower floors.

Why is airflow rate considered critical?

Airflow rate (Qa) is identified as a critical parameter for a prediction model of vertical drainage flow and air-pressure distribution in the stack.

Oct 29, 2026

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