scholarly journals Understanding Occupants’ Thermal Sensitivity According to Solar Radiation in an Office Building with Glass Curtain Wall Structure

Buildings ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 58
Author(s):  
Sung-Kyung Kim ◽  
Ji-Hye Ryu ◽  
Hyun-Cheol Seo ◽  
Won-Hwa Hong
Keyword(s):  
Solar Radiation ◽  
Thermal Environment ◽  
Thermal Sensitivity ◽  
Wall Structure ◽  
Curtain Wall ◽  
Indoor Thermal Environment ◽  
Occupant Comfort ◽  
Group A ◽  
Glass Curtain Wall ◽  
Group B

The thermal comfort of occupants in the increasing number of modern buildings with glass curtain wall structures is of significant research interest. As the thermal sensitivity of building occupants varies with building features, situational factors, and the human body’s thermal balance, it is necessary to derive the comfort temperature based on field research, which was conducted in this study in a South Korean office building with a glass curtain wall structure. The influence of solar radiation on the indoor thermal environment and thermal comfort obtained by measurements and occupant questionnaires was analyzed using cumulative graphs and a sensitivity analysis. The observed changes in operative temperature over time confirmed that occupant comfort was significantly affected by the radiant temperature. Based on this result, two groups (Group A near the windows and Group B near the interior corridor) were defined for analysis. Owing to the influx of solar radiation, Group A was more sensitive to changes in the thermal environment (0.67/°C) than Group B (0.49/°C), and the derived comfort temperature for each group differed from the set temperature by approximately ±2 °C. Thus, it was confirmed that the solar radiation introduced through a glass curtain wall building has a direct impact on the indoor thermal environment and occupant comfort according to location.

Construction Technology Research on Super Glass Curtain Wall of the Henan Art Center

2012 ◽  
Vol 170-173 ◽  
pp. 3212-3215
Author(s):  
Ya Nan Fu ◽  
Hai Tao Mao
Keyword(s):  
Wall Structure ◽  
Tension Stress ◽  
Construction Technology ◽  
Curtain Wall ◽  
Glass Wall ◽  
Factors Affecting ◽  
Structural Wall ◽  
Technical Parameters ◽  
Working Principle ◽  
Glass Curtain Wall

Henan Art Center has a new curtain wall structure - the structure cable net glass wall. Because of the cable net structure for glass curtain wall construction and design difficulties, the design of curtain wall performance to deepen the main points of cable net structural wall of the working principle, design connections, cable net structural wall of the cable construction steps, cable pre-stressing and tension when the technical parameters and under the glass curtain wall materials and installation was introduced. And the main factors affecting the performance curtain wall and the cable tension when the ambient temperature and the tension stress was studied. The results showed that the construction program was optimize and construction quality and safety was ensure.

Mechanical Properties and Calculation Method for Monolayer Cable Net Glass Curtain Wall under Fire Conditions

2014 ◽  
Vol 580-583 ◽  
pp. 2583-2588
Author(s):  
Ling Feng Gong ◽  
Yin Bai ◽  
Si Qi Li
Keyword(s):  
Mechanical Properties ◽  
Critical Temperature ◽  
Calculation Method ◽  
Large Scale ◽  
Wall Structure ◽  
Curtain Wall ◽  
Cable Force ◽  
Simulation Results ◽  
Glass Curtain Wall ◽  
Fire Conditions

The developing trend of large scale curtain wall structure system is monolayer cable net glass curtain wall, so it’s important and necessary to study the corresponding calculation method and mechanical properties under fire conditions. The changing rule of the displacement and the maximum cable force with the temperature was analyzed by making series of numerical calculations, and the principle for determining critical temperature was deeply discussed upon the basis of the numerical simulation results. The critical temperature table considering different spans, grid dimensions and cable diameters is given, and the influence on critical temperature has also been studied when initial prestressed force of vertical cable is relatively small. Some suggestions are proposed finally.

Analysis of Growing Plants in Double Glass Curtain Walls

2013 ◽  
Vol 726-731 ◽  
pp. 4484-4487
Author(s):  
Xiang Dong Xiao ◽  
Li Dong ◽  
Qi Xiang Zhang ◽  
Xiao Dong Liu
Keyword(s):  
New Technologies ◽  
Thermal Environment ◽  
New Technology ◽  
Internal Space ◽  
Curtain Wall ◽  
Outdoor Thermal Environment ◽  
Condensed Water ◽  
Glass Curtain Wall ◽  
Micro Irrigation ◽  
Simulated Calculation

Technology of reclaiming condensed water from the thermal channel of double-pane glass curtain wall and applying the reclaimed water in micro-irrigation of natural plants was explored. Selection of plant species for the internal space of double glass curtain wall was studied to meet the ecological technological requirements of double glass curtain wall. Progressive experiment of new technology and simulated calculation of indexes were applied to obtain solar radiation consumption and finally improve indoor and outdoor thermal environment. The results showed that new technologies of applying plants in double glass curtain walls help realize ecological utilization of double glass curtain walls, further reduce energy consumption of buildings.

scholarly journals CLINICAL COMPARISON OF 5% FLUORO CALCIUM PHOSPHOSILICATE VERSUS 5% CALCIUM SODIUM PHOSPHOSILICATE IN THE TREATMENT OF DENTINAL HYPERSENSITIVITY

2019 ◽  
Vol 3 (5) ◽  
Author(s):  
Dr. Huda Hussain ◽  
Prof. Suhail Majid Jan ◽  
Dr. Roobal Behal
Keyword(s):  
Thermal Sensitivity ◽  
Biological Properties ◽  
Pharmacological Agents ◽  
Vas Score ◽  
Promising Agent ◽  
Calcium Phosphosilicate ◽  
Group A ◽  
Group B ◽  
Dentinal Hypersensitivity ◽  
Over Time

Dentinal hypersensitivity is a perplexing problem for the patient as well as clinician. Among the plethora of pharmacological agents developed for the management of this rather common affliction, tubule occluding agents form the mainstay of treatment. Bioglasses (phosphosilicates) with evolving chemical and biological properties, are widely used, with the latest modification being the addition of fluoride to conventional calcium sodium phosphosilicate (Novamin) to result in fluoro calcium phosphosilicate (Biomin), purported to have superior tubule occlusive properties. The present study was designed as randomized clinical trial to compare the efficacy of Biomin and Novamin in reducing the subjective and provoked (thermal) experience of dentinal hypersensitivity. Sixty subjects were randomly prescribed three dentifrices after oral prophylaxis: Group A (20 patients):  dentifrice containing 5% fluoro calcium phosphosilicate (Biomin); Group B (20 patients): dentifrice containing 5% calcium sodium phosphosilicate (Novamin); Group C (20 patients): standard dentifrice containing fluoride. Subjective and thermal sensitivity was assessed using a 10 point VAS score at baseline, at 15 days, 30 days and 60 days of treatment. It was found that though significant reduction in hypersensitivity was observed for all three groups over time, flouro calcium phosphosilicate was most effective in reducing the VAS score, followed by calcium sodium phosphosilicate and fluoride. It was concluded that fluoro calcium phosphosilicate is a promising agent for clinical management of dentinal hypersensitivity.

scholarly journals The use of amniotic membrane in the repair of duodenal wounds in Wistar rats

2010 ◽  
Vol 25 (1) ◽  
pp. 18-23 ◽  
Author(s):  
Luciano Rodrigues Schimidt ◽  
Edson José Cardoso ◽  
Rogério Rodrigues Schimidt ◽  
Luiz Augusto Back ◽  
Maria Beatriz Schiazawa ◽  
...  
Keyword(s):  
Amniotic Membrane ◽  
Wistar Rats ◽  
Muscle Layer ◽  
Wall Structure ◽  
Duodenal Wall ◽  
Control Group ◽  
Human Amniotic Membrane ◽  
New Material ◽  
Group A ◽  
Group B

Purpose: In the search of a new material to repair duodenal wounds, a trial was conducted to assess the behavior of human amniotic membrane in the repair of the duodenal wall in rats. METHODS: Fifty Wistar rats weighing between 250 and 350g, male, were submitted to duodenotomy and randomly distributed into two groups. Group A (n=8) had no treatment and was used as the control group. In Group B (n=42) the duodenal wound was treated with a patch of human amniotic membrane. RESULTS: All animals in Group A died. In Group B no changes were observed with regards to death or the formation of duodenal fistula. All animals presented peritoneal adherences in the region on the duodenal wall repair and intestinal obstruction was observed in two animals. Healing of the duodenal wall in the region of the patch took place progressively as the post-operatory period increased, with regeneration of the mucosa and of the smooth muscle layer. CONCLUSION: From the clinical standpoint, the amniotic membrane proved to be a biological tissue which served as a temporary seal and allowed the wound to heal by second-intention, with re-establishment of the duodenal wall structure.

Thermal Environment Change in Growing Premature Infants: Effect on General Somatic Growth and Subcutaneous Fat Accumulation

PEDIATRICS ◽  
1981 ◽  
Vol 68 (1) ◽  
pp. 82-86
Author(s):  
Ruth Heimler ◽  
James E. Sumners ◽  
John P. Grausz ◽  
Craig L. Kien ◽  
John C. Glaspey
Keyword(s):  
Premature Infants ◽  
Cold Resistance ◽  
Thermal Environment ◽  
Subcutaneous Fat ◽  
Somatic Growth ◽  
Environment Change ◽  
Before And After ◽  
Gross Energy ◽  
Group A ◽  
Group B

Fourteen growing, healthy premature infants were moved from heated incubators to cribs at different points in their growth. Group A (six babies) was moved when babies reached a weight of 1,600 to 1,700 gm; group B (eight babies) when babies reached a weight of 1,800 to 1,900 gm. All other conditions of rearing were kept the same. The effect on their growth and thermal stability was measured during the week before and after the temperature change. All infants tolerated the change well. There was no drop in abdominal temperature in an environment cooler by 5 C. The rate of weight gain correlated with gross energy intake only and did not differ within or between the two groups. The rate of growth of the skinfolds increased dramatically after the infants were moved from the incubator. A cooler environment in a growing premature infant (weight >1,600 gm) may promote faster deposition of subcutaneous fat. This might be an important factor in efficient gain in cold resistance.

Analysis and Calculation of the Force of Glass Panel of the Point Supported Glass Curtain Wall

2011 ◽  
Vol 255-260 ◽  
pp. 580-586
Author(s):  
Zhi Peng Huo ◽  
Cheng Wei Huang ◽  
Guang Jie Zhang
Keyword(s):  
Maximum Stress ◽  
Wall Structure ◽  
Maximum Deflection ◽  
Glass Panel ◽  
Curtain Wall ◽  
Finite Element Software ◽  
Sheet Structure ◽  
Glass Curtain Wall ◽  
Cloud Atlas ◽  
Elastic Mechanics

Based on elastic mechanics, this article deduced the theoretical value of the maximum stress and maximum deflection of sheet structure which was applied on point supported glass curtain wall structure, and figure out the stress and deflection values by calculation example. After that by simulating the structure with the finite element software ANSYS we drew the cloud atlas of stress and deflection values which we analyzed and compared with the theoretical values. Finally we can work out the error between the theoretical values and simulate value and analysis it.

scholarly journals Impact of ventilation system type on indoor thermal environment and human thermal comfort in a ceiling cooling room

2021 ◽  
pp. 277-277
Author(s):  
Xiaozhou Wu ◽  
Genglin Liu ◽  
Jie Gao ◽  
Shuang Wu
Keyword(s):  
Thermal Comfort ◽  
Air Temperature ◽  
Thermal Environment ◽  
Thermal Sensation ◽  
Ventilation System ◽  
Physical Parameters ◽  
Curtain Wall ◽  
Indoor Thermal Environment ◽  
Human Thermal Comfort ◽  
System Type

A ceiling cooling (CC) system integrated with a mechanical ventilation system is an advanced HVAC system for the modern office building with glass curtain wall. In this paper, considering the influence of heat transfer of external envelope, the indoor thermal environment and human thermal comfort were objectively measured and subjectively evaluated in a ceiling cooling room with mixing ventilation (MV) or underfloor air distribution (UFAD). Indoor physical parameters and human skin temperatures were measured as the chilled ceiling surface temperature and supply air temperature were 17.1?C-17.6?C and 22.2?C - 22.6?C. Simultaneously, 16 subjects (8 males and 8 females) were selected to subjectively evaluate the thermal environment. The results showed that the difference between mean radiant temperature and air temperature in the occupied zone was 0.8?C with CC+MV and 1.2?C with CC+UFAD, and the indoor air velocity was 0.17m/s with CC+MV and 0.13m/s with CC+UFAD. In addition, the calculated and measured thermal sensation votes with CC+MV were all slightly less than those with CC+UFAD. Therefore, ventilation system type had a slight impact on the indoor thermal environment and human thermal comfort in the ceiling cooling room.

The Detection and Analysis of Different Exterior Decorative Materials CS Panel Solar Radiation Performance Energy Saving Influence

2013 ◽  
Vol 368-370 ◽  
pp. 1007-1012
Author(s):  
Feng Hua Zhao ◽  
Hai Rong Dong ◽  
Y.Y. Zhou
Keyword(s):  
Energy Efficiency ◽  
Solar Radiation ◽  
Energy Saving ◽  
Thermal Environment ◽  
Building Energy ◽  
Radiation Absorption ◽  
Building Energy Efficiency ◽  
Absorption Properties ◽  
Indoor Thermal Environment ◽  
Main Factors

The research of CS panel integration performance of energy saving, load bearing and decoration, shows that exterior materials reflection and absorption of solar radiation is one of the main factors that affects the thermal insulation and building energy efficiency. In this work the experimental detection data is analyzed both quantitatively and qualitatively in order to realize the influence of different solar radiation absorption properties from the outer decorative materials to the CS panel indoor thermal environment and energy-saving. The principle of energy saving optimization choice of the CS panel exterior decorative materials is proposed.

New Correlations Including Hourly Horizontal Radiation for Predicting Indoor Thermal Environment

2011 ◽  
Vol 71-78 ◽  
pp. 2671-2674
Author(s):  
Sheng Xian Wei ◽  
Shi Mei Guo ◽  
Xi Jia He
Keyword(s):  
Solar Radiation ◽  
Air Temperature ◽  
Natural Ventilation ◽  
Thermal Environment ◽  
Thermal Sensation ◽  
Environmental Parameters ◽  
Newton’S Iterative Method ◽  
Indoor Thermal Environment ◽  
One Year ◽  
Radiant Temperature

Fanger’s PMV is the most famous thermal sensation index but it is too complex to be applied in practice. Besides, the PMV index does not include the effect of horizontal solar radiation on the indoor thermal environment. In order to obtain simple and applicable correlations with consideration of solar radiation, a one-year measurement has been conducted in a naturally ventilated residential room in Qujing Normal University of Yunnan province, China. Based on collected data, PMV indices are calculated by using Newton’s iterative method. The relationships of the PMV and the environmental parameters — outdoor air temperature, indoor mean air temperature, mean radiant temperature, wind velocity, relative humidity, and hourly horizontal solar radiation — have been studied by the multivariable regression techniques. Large numbers of correlations with high correlativity have been developed in the present paper. It is convenient to use them to evaluate and predict the indoor thermal environment in the natural ventilation buildings.

Sign in / Sign up

Export Citation Format

Share Document