scholarly journals A Study on the Analysis of Pressure Difference According to the Stack Effect of High-Rise Buildings during Fire

2021 ◽  
Vol 21 (1) ◽  
pp. 161-168
Author(s):  
HyeWon Kim ◽  
InHyuk Koo ◽  
YunSeong Kim ◽  
ByeongHeun Lee ◽  
SeungHyeo Jin ◽  
...  
Keyword(s):  
Temperature Change ◽  
Pressure Difference ◽  
Temperature Increase ◽  
Growth Period ◽  
Indoor Temperature ◽  
Stack Effect ◽  
High Rise

As the number of high-rise buildings in Korea continues to increase, interest in the stack effect is increasing. In particular, in the event of a fire, as the indoor temperature increases, there is the problem that the stack effect increases. Accordingly, it is necessary to analyze the stack effect resulting from temperature change during a fire. In this study, by using CONTAMW simulation, the opening was opened or closed. In the case where the temperature of the fire room rises to the temperature of the growth period caused by a fire, the pressure difference in the building according to the temperature increase during a fire was confirmed. As a result, depending on whether the opening was opened or closed, the pressure difference was uniform for each layer, ranging from 0 to 100 Pa when opened. However, assuming a fire room, the pressure in the fire layer increased to approximately 250 Pa, and it was confirmed that the pressure difference varied greatly for each floor.

scholarly journals STUDY OF THE EFFECT OF ENVIRONMENTAL PROBLEMS CAUSED BY STACK EFFECT ON HIGH-RISE RESIDENTIAL BUILDING USING COMIS MODEL

2007 ◽  
Vol 72 (619) ◽  
pp. 69-74 ◽  
Author(s):  
Hiroshi YOSHINO ◽  
Maatouk KHOUKHI ◽  
Shin HAYAKAWA ◽  
Jong-hoon LEE ◽  
Kyung-hun WOO ◽  
...  
Keyword(s):  
Residential Building ◽  
Environmental Problems ◽  
Stack Effect ◽  
High Rise

scholarly journals Pacific variability reconciles observed and modelled global mean temperature increase since 1950

2020 ◽  
Author(s):  
Martin B. Stolpe ◽  
Kevin Cowtan ◽  
Iselin Medhaug ◽  
Reto Knutti
Keyword(s):  
Global Warming ◽  
Temperature Change ◽  
Temperature Increase ◽  
Global Temperature ◽  
Global Mean Temperature ◽  
Mean Temperature ◽  
The Pacific ◽  
Global Warming Hiatus ◽  
Warming Hiatus ◽  
Global Mean

Abstract Global mean temperature change simulated by climate models deviates from the observed temperature increase during decadal-scale periods in the past. In particular, warming during the ‘global warming hiatus’ in the early twenty-first century appears overestimated in CMIP5 and CMIP6 multi-model means. We examine the role of equatorial Pacific variability in these divergences since 1950 by comparing 18 studies that quantify the Pacific contribution to the ‘hiatus’ and earlier periods and by investigating the reasons for differing results. During the ‘global warming hiatus’ from 1992 to 2012, the estimated contributions differ by a factor of five, with multiple linear regression approaches generally indicating a smaller contribution of Pacific variability to global temperature than climate model experiments where the simulated tropical Pacific sea surface temperature (SST) or wind stress anomalies are nudged towards observations. These so-called pacemaker experiments suggest that the ‘hiatus’ is fully explained and possibly over-explained by Pacific variability. Most of the spread across the studies can be attributed to two factors: neglecting the forced signal in tropical Pacific SST, which is often the case in multiple regression studies but not in pacemaker experiments, underestimates the Pacific contribution to global temperature change by a factor of two during the ‘hiatus’; the sensitivity with which the global temperature responds to Pacific variability varies by a factor of two between models on a decadal time scale, questioning the robustness of single model pacemaker experiments. Once we have accounted for these factors, the CMIP5 mean warming adjusted for Pacific variability reproduces the observed annual global mean temperature closely, with a correlation coefficient of 0.985 from 1950 to 2018. The CMIP6 ensemble performs less favourably but improves if the models with the highest transient climate response are omitted from the ensemble mean.

Some effects fo temperature on the Diurnal Periodicity of adult emergence in Trichopoda pennipes (Diptera: Tachinidae)

1959 ◽  
Vol 7 (1) ◽  
pp. 1
Author(s):  
F Wilson ◽  
GJ Snowball
Keyword(s):  
Temperature Change ◽  
Temperature Increase ◽  
Adult Emergence ◽  
Diurnal Periodicity

There is a marked diurnal periodicity of adult emergence in Trichopoda pennipes. This periodicity is greatly modified by temperature change, and adults can be induced to emerge at any time by providing a temperature-increase stimulus. Adults sometimes emerge in response to very small increases of temperature.

Heat generation associated with pressure-induced infiltration in a nanoporous silica gel

2008 ◽  
Vol 23 (7) ◽  
pp. 1902-1906 ◽  
Author(s):  
Aijie Han ◽  
Venkata K. Punyamurtula ◽  
Yu Qiao
Keyword(s):  
Energy Dissipation ◽  
Temperature Variation ◽  
Temperature Change ◽  
Silica Gel ◽  
Heat Generation ◽  
Temperature Increase ◽  
Maximum Temperature ◽  
Nanoporous Silica ◽  
Sorption Behavior ◽  
Multiple Loading

As a liquid moves in the nanopores of a silica gel, because of the hysteresis of sorption behavior, significant energy dissipation can take place. Through a calometric measurement, the characteristics of associated heat generation are investigated. The temperature variation increases with the mass of silica gel, which consists of a reversible part and an irreversible part. The residual temperature change is about 30% to 60% of the maximum temperature increase and can be accumulated as multiple loading cycles are applied.

scholarly journals Experiment of Dutch Tulip Cultivation in Open Field in Shanghai, China—Effect of Temperature Change on Flowering Duration

2018 ◽  
Vol 3 (1) ◽  
pp. 35
Author(s):  
Jin GUO
Keyword(s):  
Temperature Change ◽  
Open Field ◽  
Negative Correlation ◽  
Detection Method ◽  
Growth Period ◽  
Early Flowering ◽  
Effect Of Temperature ◽  
Flowering Duration ◽  
Period Data

<p><em>In recent years, a large number of Dutch tulip varieties have been cultivated in the open field of Shanghai Flower Port (The biggest tulip park in China). In this paper, nine tulip varieties’ growth period data were recorded for this experiment. By comparing the flowering duration of different varieties, it is concluded that planting early flowering varieties in Shanghai is more economical. At the end of this paper, by correlation detection method, it is concluded that there is a negative correlation between the flowering duration and temperature in Shanghai, China.</em></p>

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

Effect of Tree Shading on the Thermal Load of a House in a Warm Climate Zone in Mexico

2012 ◽  
Author(s):  
M. A. Chagolla ◽  
G. Alvarez ◽  
E. Simá ◽  
R. Tovar ◽  
G. Huelsz
Keyword(s):  
Temperature Increase ◽  
Energy Savings ◽  
Maximum Temperature ◽  
Warm Climate ◽  
Indoor Temperature ◽  
Maximum Temperature Difference ◽  
Energy Plus ◽  
Test House ◽  
Simulation Results ◽  
North Latitude

This paper presents the effect of the shade of a tree on the indoor temperature and thermal loads of a house (test house) located in the State of Morelos, Mexico, 18° 50′ 43″ north latitude and 99° 10′ 44″ west longitude. Energy Plus was used to simulate different geometries of the shadow of a tree and the simulation results were compared with experimental measurements of the house without air-conditioning, for one warm and one cold week of the year 2011. The results showed that the maximum temperature difference between the measured and simulated temperatures with both geometry models of tree-shading was 1.7°C. When the effect of tree shading is not considered, it was found that there is a maximum temperature increase of 4°C in the warm week compared with the measured results. In the cold week, the temperature increase was 1.3°C compared with the measured results. Simulation results for an air-conditioned tree-shaded test house show that total annual energy consumption for cooling and heating to achieve thermal comfort represents a substantial energy savings of 76.6% when compared with an unshaded house.

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