scholarly journals Analysis of impact factors affecting on the stack effect in high-rise building

KIEAE Journal ◽  
2016 ◽  
Vol 16 (3) ◽  
pp. 95-101
Author(s):  
Jin-Hwan Oh ◽  
Doo-Sam Song ◽  
Sung-Min Yoon ◽  
Yujin Nam
Keyword(s):  
Impact Factors ◽  
Factors Affecting ◽  
Stack Effect ◽  
High Rise ◽  
High Rise Building

Numerical Simulation for Outdoor Thermal Environment of High-Rise Building With Air-Conditioner

2010 ◽  
Author(s):  
Zhen Zhang ◽  
Lige Tong ◽  
Li Wang
Keyword(s):  
Solar Radiation ◽  
Thermal Environment ◽  
Installation Space ◽  
Air Conditioner ◽  
Confined Space ◽  
Steady State Condition ◽  
Factors Affecting ◽  
High Rise ◽  
High Rise Building ◽  
Heat Released

A large number of split-type air conditioner are widely used in high-rise residential or office buildings in China and the outdoor units of air-conditioner are often installed at the sidewalls or on the roofs in the confined space of a high-rise building. The factors affecting the performance of air-conditioner are the solar radiation, the heat released from the outdoor units, the ventilation of the confined installation space of a building where the outdoor units are installed and so on, which are investigated in this study. The air flow and temperature distribution under steady-state condition near the two outdoor units installed on the same storey in a building are simulated by software FLUENT, in which the porous model and DO radiation model are used. The optimum installation distance from the supporting wall is obtained. The average temperature of the exit surface without wind is 1.18% more than that with wind. The results show that the heat released from the outdoor units and the ventilation of the confined installation space where the outdoor units are installed are the main factors affecting the thermal environment in the confined installation space; The influence of the solar radiation can be neglected.

The Research of High-rise Building Fire Safety Simulation Model Based on System Dynamics

2014 ◽  
Vol 614 ◽  
pp. 605-609
Author(s):  
Jin Feng Wang ◽  
Ye Liu ◽  
Xue Qi Zhai
Keyword(s):  
Simulation Model ◽  
Fire Safety ◽  
Graph Model ◽  
Flow Graph ◽  
Factors Affecting ◽  
Building Fire ◽  
High Rise ◽  
High Rise Building ◽  
Design Fire ◽  
Fire Design

Firstly, this paper analyzed the factors affecting high-rise building fire safety in terms of the aspects of staff awareness, high-rise building fire design, fire-fighting facilities, daily management, and technology and so on. Secondly, on this basis, I determined the flow graph model and variables, and constructed high-rise building fire safety simulation model. Finally, a high-rise building was used to verify the applicability of the model. The findings have developed a clear direction in order to strengthen the management and formulation of high-rise building fire safety.

scholarly journals HVAC Operation Schemes and Commissioning Process Resolving Stack Effect Problem and Adjusting According to Changes in the Environment: A Case Study in High-Rise Building in South Korea

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2299
Author(s):  
Jungyeon Yu ◽  
Angie Kim ◽  
Sanghwan Bae ◽  
Dongwoo Cho ◽  
Kee Han Kim
Keyword(s):  
South Korea ◽  
Noise Level ◽  
Operation Mode ◽  
Hvac System ◽  
Commercial Building ◽  
Stack Effect ◽  
Operating Modes ◽  
High Rise ◽  
High Rise Building

Various problems often arise in high-rise buildings during the winter months due to the stack effect. In this study, the high-rise building of interest, located in South Korea, was experiencing constant loud noises in the winter due to the stack effect. Thus, we created a noise level reduction plan by creating a method for pressurizing the high-rise zones of the building according to outdoor conditions. To discover the appropriate pressurization operating modes, we applied a two-year commissioning process to the 50-story building of interest. The 1st- and 47th-floor elevator halls were identified to have the highest noise levels of all other floors. Prior to applying the reduction plan, the maximum noise level on the first floor with the HVAC system turned off was 85 dB(A) and with the HVAC system turned on it was 70 dB(A). Both values exceeded the criteria of 57 dB(A) for a lobby space of a commercial building. In the case of the 47th floor, the maximum noise level with the HVAC system turned off was 58.7 dB(A) and with the HVAC system turned off was 56.0 dB(A), despite the latter having increased airtightness performance and applying preliminary pressurization (i.e., HVAC operation mode 2). These values exceeded the criteria of 48 dB(A) for an elevator hall in a commercial building. Following this initial data, we determined to pressurize the high/mid-rise zones of the building according to the outdoor air temperature and wind velocity conditions, which we categorized into four types (i.e., HVAC operation mode 4). To this effect, the first-floor elevator hall’s maximum noise level was 56.6 dB(A), meeting the criteria, and the 47th-floor elevator hall’s maximum noise level was 49.5 dB(A), still exceeding the criteria but by an insignificant amount. Although the HVAC pressurization operation we utilized resulted in favorable results for the target building A, it may not be as effective in other new high-rise buildings, creating changes to the indoor air environment or to the energy costs in maintaining a building. However, for the purposes of resolving the stack effect, we believe that the commissioning process we took to optimize the HVAC operation that is presented here can be applied to other new and existing high-rise commercial buildings.

scholarly journals Airborne and Terrestrial Observations of the Thermal Environment of Urban Areas Surrounding a High-Rise Building during the Japanese Winter

Sensors ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 517
Author(s):  
Haruki Oshio ◽  
Kan Chen ◽  
Takashi Asawa
Keyword(s):  
Remote Sensing ◽  
Urban Areas ◽  
Thermal Environment ◽  
Factors Affecting ◽  
Tokyo Metropolitan Area ◽  
High Rise ◽  
High Rise Building ◽  
North East ◽  
Strong Winds ◽  
Surrounding Areas

We investigated the distribution of air temperature (Ta) and the factors affecting it in low-rise areas surrounding an isolated high-rise building during the Japanese winter. The study site was the central part of a regional city in Japan (36°5′ N, 140°12′ E), lying north-east of the Tokyo metropolitan area. The daytime surface temperature (Ts) in the shade is generally considered to be comparable to Ta; however, according to airborne remote sensing conducted in December 2009 where a multi-spectral scanner was installed on a fixed-wing aircraft, Ts for pavements in the shade of a high-rise building was significantly lower than Ta of sub-urban areas, indicating an influence of cold storage on Ts. Then, we conducted mobile observations using instruments (thermocouple, four component radiometer, and so on) installed on a bicycle in January 2016 to investigate the detailed distribution of Ta and the factors affecting it. The results showed the Ta over the pavements in the shade of the high-rise building was lower than the Ta of sunlit areas in the same urban area by −2 °C and lower than the Ta of sub-urban areas by −1–1.5 °C, although the advection effect was large due to strong winds around the building. In conclusion, a locally lower Ta compared to the surrounding areas can develop during the day in winter, even in spaces that are open to areas beyond the canopy.

Exploring the relationship between failure factors and stakeholder coordination performance in high-rise building projects: empirical study in the finishing phase

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sy Tien Do ◽  
Viet Thanh Nguyen ◽  
Chau Ngoc Dang
Keyword(s):  
Structural Equation ◽  
Equation Model ◽  
Project Planning ◽  
Building Projects ◽  
Content Type ◽  
Factors Affecting ◽  
High Rise ◽  
High Rise Building ◽  
The Impact ◽  
Failure Factors

PurposeThis study aims to discover the impact of failure factors on stakeholder coordination performance (SCP) in the finishing phase of high-rise building projects.Design/methodology/approachFirstly, this study identifies potential failure factors affecting coordination performance as well as criteria for measuring SCP in the finishing phase of high-rise building projects. Afterwards, a survey questionnaire is designed to collect data from high-rise building projects in Vietnam. Using the factor analysis method, the study discovers the failure constructs. A structural equation model is then built to uncover the relationships between failure constructs and SCP.FindingsThe study identified four failure constructs which could significantly affect SCP, namely traditional adversarial relationship (TAR), incompetent parties (IP), poor project planning and organization (PPO) and delays of parties toward construction works (DP). The developed model indicated that TAR, PPO and IP significantly affected stakeholders' coordination performance in the finishing phase of high-rise building projects.Originality/valueThe results of the study fill the gap in knowledge by discovering the causal relationships between failure constructs and SCP in high-rise building projects. The results might provide an initial guideline for stakeholders during the finishing phase of high-rise building projects to enhance their coordination performance.

Partial Collapse During Construction of a High Rise Building Due to Fire

2005 ◽  
Vol 90 (5) ◽  
pp. 42-48
Author(s):  
Predrag L. Popovic ◽  
Richard C. Arnold
Keyword(s):  
High Rise ◽  
High Rise Building
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