scholarly journals OPEN SPACE DESIGN STUDY ON THE BASIS OF EXTREME MICROCLIMATE AND SPATIAL BEHAVIOR IN NORTHERN CHINA

2018 ◽  
pp. 180-192
Author(s):  
Zhiming Guo ◽  
Tsuyoshi Setoguchi ◽  
Norihiro Watanabe ◽  
Ke Huo
Keyword(s):  
Optimization Design ◽  
Open Space ◽  
Northern China ◽  
Comfort Level ◽  
Spatial Behavior ◽  
Air Velocity ◽  
Space Forms ◽  
Outdoor Activities ◽  
Outdoor Comfort ◽  
Spatial Behaviors

Microclimate in open space affected by the urban layout and spatial forms plays an important role in the outdoor comfort, thus the outdoor activities based on the comfort sensation will directly affected by the microclimate. An outstanding open space should satisfy different requirements of outdoor activities and create relatively comfortable sensation. Most studies have been conducted on these relationships only above 0 Celsius degree. However, only few have focused on extreme situations in both hot and cold seasons. Therefore, from microclimate perspective, taking people’s comfort and spatial behaviors as criterions, this research discussed how the open space forms affect microclimate, thus affect comfort sensation and spatial behaviors. The outcomes may provide some useful insights for planners and architects to understand the relationship among microclimate, open space and people. Results showed that microclimate obviously affected people’s comfort. In hot season, shade and air-flow played crucial roles in outdoor comfort. People tend to stay outside in the shade and the area with higher air velocity. After sunset is popular period for outdoor activities. In cold season, at the same ambient temperature, lower air velocity raised the comfort level. Shade also had influences on comfort sensation but do not affect spatial behaviors significantly. This paper also proposes optimization design proposals of densely populated open space based on extreme microclimate and spatial behaviour.

scholarly journals Public Open Space Design Study on the Basis of Microclimate and Spatial Behavior in Hot and Cold Weather Conditions in Downtown Area

2018 ◽  
Vol 12 (2) ◽  
pp. 128 ◽  
Author(s):  
Zhiming GUO ◽  
Tsuyoshi SETOGUCHI ◽  
Norihiro WATANABE ◽  
Ke HUO
Keyword(s):  
Optimization Design ◽  
Open Space ◽  
Comfort Level ◽  
Spatial Behavior ◽  
Cold Weather ◽  
Air Velocity ◽  
Space Forms ◽  
Outdoor Activities ◽  
Outdoor Comfort ◽  
Spatial Behaviors

Microclimate in open space affected by the urban layouts and spatial forms plays an important role in the outdoor comfort, thus the outdoor activities based on the comfort sensation will directly affected by the microclimate. An outstanding open space should satisfy different requirements of outdoor activities and create relatively comfortable sensation.Most studies have been conducted on these relationships only above 0 Celsius degree. However, only few have focused on extreme situations in both hot and cold seasons. Therefore, from microclimate perspective, taking people’s comfort and spatial behaviors as criterions, this research discussed how the open space forms affect microclimate, thus affect comfort sensation and spatial behaviors. The outcomes may provide some useful insights for planners and architects to understand the relationship among microclimate, open space and people.Results showed that microclimate obviously affected people’s comfort. In hot season, shade and air-flow played crucial roles in outdoor comfort. People tend to stay outside in the shade and the area with higher air velocity. After sunset is popular period for outdoor activities. In cold season, at the same ambient temperature, lower air velocity raised the comfort level. Shade also had influences on comfort sensation but do not affect spatial behaviors significantly.This paper also proposes optimization design proposals of densely populated open space based on extreme microclimate and spatial behaviour.

scholarly journals POLA AKTIVITAS RUANG TERBUKA PUBLIK PADA KAWASAN TAMAN FATAHILLAH JAKARTA

2017 ◽  
Vol 11 (6) ◽  
pp. 265 ◽  
Author(s):  
Dedi Hantono
Keyword(s):  
Open Space ◽  
Descriptive Analysis ◽  
Qualitative Approach ◽  
Historic Buildings ◽  
Analysis Method ◽  
Conservation Area ◽  
Space Forms ◽  
Linear Pattern ◽  
Public Open Space ◽  
Space Activities

Abstract: Fatahillah Park in front of Fatahillah Museum is part of Jakarta Kota area (called Kota Tua, Old Town) which is a conservation area. Fatahillah Park currently serves as a public open space surrounded by historic buildings on four sides. As a public open space, Taman Fatahillah is visited by people from various regions in Indonesia and foreign tourists, so there are various activities in it. This paper describes the results of research on the pattern of human activity (visitors) in Taman Fatahillah. The research used qualitative approach and descriptive analysis method. As a result, as a public open space, Taman Fatahillah is accessed by anyone and within the timeframe from morning to evening. Activities that take place in Taman Fatahillah are dominated by secondary actors (visitors) while the primary actors (traders) are limited by a certain place and time. The activity on the path space forms a linear pattern and on an open field forming a random pattern.Keywords: public open space, activities, area, conservation, urban designAbstrak: Taman Fatahillah di depan Museum Fatahillah adalah bagian dari kawasan Jakarta Kota (disebut Kota Tua) yang merupakan kawasan konservasi. Taman Fatahillah saat ini berfungsi sebagai ruang terbuka publik yang dikelilingi oleh bangunan-bangunan bersejarah pada empat sisi. Sebagai ruang terbuka publik, Taman Fatahillah didatangi orang-orang dari berbagai daerah di Indonesia dan wisatawan manca negara, sehingga muncul beragam aktifitas di dalamnya. Tulisan ini memaparkan hasil penelitian tentang pola aktivitas manusia (pengunjung) di Taman Fatahillah. Penelitian menggunakan pendekatan kualitatif dan metode analisis deskriptif. Hasilnya, sebagai ruang terbuka publik, Taman Fatahillah diakses oleh siapa saja dan dalam rentang waktu dari pagi hari hingga malam hari. Aktivitas yang berlangsung di Taman Fatahillah didominasi oleh pelaku sekunder (pengunjung) sedangkan pelaku primer (pedagang) dibatasi oleh tempat dan waktu tertentu. Aktivitas pada ruang jalan membentuk pola linier dan pada lapangan terbuka membentuk pola acak.Kata Kunci: ruang terbuka publik, aktivitas, kawasan, konservasi, rancang kota

Comparison on Simulation and Experiment of Supply Air through Metro Vehicle Air Conditioning Duct

2010 ◽  
Vol 44-47 ◽  
pp. 1724-1728
Author(s):  
Hong Ge Tao ◽  
Huan Xin Chen ◽  
Jun Long Xie ◽  
Jun Zhi Jiang
Keyword(s):  
Air Conditioning ◽  
Optimization Design ◽  
Simulation Method ◽  
Test Results ◽  
Air Velocity ◽  
Relative Deviation ◽  
Air Volume ◽  
Experiment Validation ◽  
Simulation And Experiment ◽  
Actual Test

CFD technique is often employed to simulate and optimize air duct design, but the corresponding experiment validation in metro vehicle is rare. By taking an independent metro vehicle duct as research object in this paper, supply air through air duct is simulated and compared with the actual test results from the angle of supply air velocity at each outlet and supply air volume through several outlets of air duct. The results show that the relative deviation of simulation and test value of air velocity at most of the outlets are within or near ±20%, which is acceptable for the engineering applications. Moreover, the ratio of supply air volume through several outlets to the corresponding total supply air volume through main air duct or flat duct in the case of simulation is consistent with that in the case of experiment. It can be concluded that numerical simulation method is effective and reliable in air duct optimization design of metro vehicle.

CFD-Based Parametric Analysis on the Performance of Personalized Partition Air Distribution Systems

Solar Energy ◽  
2006 ◽  
Author(s):  
Kybum Jeong ◽  
Moncef Krarti ◽  
Zhiqiang Zhai
Keyword(s):  
Thermal Comfort ◽  
Air Temperature ◽  
Distribution System ◽  
Distribution Systems ◽  
Comfort Level ◽  
Cfd Modeling ◽  
Air Distribution ◽  
Air Velocity ◽  
Comfort Index ◽  
System Mode

The partition air distribution systems evaluated in this study allow occupants to control the system mode (on/off) and the supply air velocity and direction with similar flexibility as occupants in automobiles. To find optimal specifications for the partition air distribution systems that are able to achieve comfortable micro-environment, a CFD modeling tool was used to simulate the airflow and thermal performance of the partition air distribution systems in a typical office space. By analyzing the distribution characteristics of indoor air temperature, air velocity and thermal comfort index, the study assessed the performance of the partition air distribution systems with different operating parameters. The simulation results were analyzed and evaluated to assess both occupant’s thermal comfort and system energy consumption. The study shows that space cooling energy can be reduced while maintaining acceptable indoor thermal comfort level using a partition air distribution system with a higher supply air temperature.

scholarly journals Air flow characteristics of a room with air vortex diffuser

2018 ◽  
Vol 240 ◽  
pp. 02002 ◽  
Author(s):  
Marek Borowski ◽  
Marek Jaszczur ◽  
Daniel Satoła ◽  
Michał Karch
Keyword(s):  
Air Flow ◽  
Ventilation System ◽  
Flow Characteristics ◽  
Comfort Level ◽  
Translational Velocity ◽  
Comfort Zone ◽  
Air Velocity ◽  
Velocity Decay ◽  
Different Diameters ◽  
Comfort Criteria

The air diffuser is a very important component of any ventilation system, and the comfort level of ventilated space occupants depend among many other factors on properly designed and choice of diffusers. At present a large number of diffusers are produced to meet a different kind of requirements. One of the most efficient and very popular types of the diffuser is the vortex diffuser in which air flow has angular as well as translational velocity components. This paper investigates experimentally airflow characteristics of vortex ceiling diffuser and its effect on airflow in a ventilated space. Two thermal comfort criteria namely: mean age of the air and ventilation effectiveness have been used to predict the comfort zone inside the room. Effect of supply air velocity on the flow field is investigated and hence the on comfort and energy consumption. The results show that significant amount of energy can be saved by using vortex diffuser in reference to the other diffusers type. The values of the velocity decay coefficient were compared for different diameters of vortex diffuser.

CFD Simulations to Predict Comfort Level of Outdoor Wind Environment for Taipei Flora Exposition

2013 ◽  
Vol 421 ◽  
pp. 844-849
Author(s):  
An Shik Yang ◽  
Chao Jui Chang ◽  
Yu Hsuan Juan ◽  
Ying Ming Su
Keyword(s):  
Natural Ventilation ◽  
Open Space ◽  
Comfort Level ◽  
Cfd Analysis ◽  
Cfd Simulations ◽  
Wind Environment ◽  
Wind Comfort

The goal of this investigation is to conduct the CFD analysis in conjunction with the wind comfort level standard to predict the pedestrian wind comfort level around the Dreams, Angel Life and Future pavilions in the Xinsheng Park of the Taipei International Flora Exposition. The computerized airflow simulations were carried out to predict the detailed flowfield for determining the comfort level of outdoor wind environment for three pavilions in the Xinsheng Park. In order to generate the suitable environments of natural ventilation for visitors, the calculated results can be used to appraise the sufficiency of natural ventilation for the open space around the building cluster.

scholarly journals Study of Urban Greenery Models to Prevent Overheating of Parked Vehicles in P + R Facilities in Ljubljana, Slovenia

2020 ◽  
Vol 12 (12) ◽  
pp. 5160
Author(s):  
Alenka Fikfak ◽  
Kristijan Lavtižar ◽  
Janez Peter Grom ◽  
Saja Kosanović ◽  
Martina Zbašnik-Senegačnik
Keyword(s):  
Comfort Level ◽  
Urban Heat Islands ◽  
Sustainable Mobility ◽  
Main Research ◽  
Heat Islands ◽  
Urban Greenery ◽  
Parking Lot ◽  
Negative Effect ◽  
Outdoor Comfort ◽  
Urban Heat

Parking in park-and-ride (P + R) facilities on the outskirts of a city reduces the traffic inside the cities and follows the principles of sustainable mobility. However, large paved (asphalt) surfaces create urban heat islands (UHI). This causes the temperature to rise in vehicles during full-day parking, which has a negative effect on comfort level and driving performance. This study was conceptualized as two-stage research. The first (preliminary) stage dealt with the measurement and analysis of temperature data at two nearby open parking lots in the city of Ljubljana, one of which was the main research spatial area, P + R Barje (L1), and Trnovo parking (L2), which was used for comparison in the first-stage research. In the preliminary research, we underlined the problem of long-term parking in parking areas exposed to heatwaves (HW). The second stage involved the studying of greening schemes in P + R facilities, which would allow for optimal shading during parking. Advanced 3D and 4D models using ENVI-met and LEONARDO software were developed, which assessed the parking surfaces and the areas of optimum outdoor comfort. Shading by greenery was adopted in this paper, as the strategy aimed at improving the conditions by modelling different variants of greening the parking lot L1.

Research on the New Form of Design

2013 ◽  
Vol 838-841 ◽  
pp. 2913-2916
Author(s):  
Yu Zhang ◽  
Li Dong
Keyword(s):  
Open Space ◽  
Industrial Park ◽  
Design Matrix ◽  
Entire Space ◽  
Design Exploration ◽  
Space Forms ◽  
Design Program ◽  
New Form ◽  
Park Design ◽  
The Relationship

Through the analysis of the Dalian GSIC Industrial Park Design program, this paper describes the design exploration of linear space forms: trying to simulate the growth of organisms and operation of machines on the premise of breaking the traditional geometric planning pattern, the thesis brings forward design matrix of Vein and giant structure, then establishes a new kind of living order and more open space in the system of the entire space while fully taking account of the relationship among people, roads and buildings.

Experimental Study of the Effects of Different Space Forms on SAW Passive Wireless Temperature Measurement System

2013 ◽  
Vol 805-806 ◽  
pp. 1046-1053
Author(s):  
Hai Fang Yue ◽  
Jie Lou
Keyword(s):  
Temperature Measurement ◽  
Measurement System ◽  
Open Space ◽  
Electrical Equipment ◽  
Closed Space ◽  
Space Forms ◽  
Infrared Temperature Measurement ◽  
Electromagnetic Signals ◽  
Temperature Measurement System ◽  
Measuring Signal

The passive wireless temperature measurement system based on SAW is a better method than the fiber optic and the infrared temperature measurement in measuring the temperature of electrical equipment, but the environmental characteristics have an effect on it. In this paper, the effects of open space and closed space on the system are studied by experiments. The open space has a greater effect on temperature measuring signal because of the polarization direction of the antenna; In the closed space of the metal cabinet, whether there is sheet metallic object near the senor or not, it has no effects on the signal, which is mainly because that the reflections of electromagnetic signals by the internal walls of the metal cabinet make the signal power enhanced between the reader and the sensor through multi-angle reflections. Therefore, this type of measurement system is more suitable for the metallic objects in metal cabinet.

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