Field measurement and assessment on airflow thermodynamic parameters in hot and humid underground tunnelling: A case study

2022 ◽  
Vol 121 ◽  
pp. 104341
Author(s):  
Zhaoxiang Chu ◽  
Guoqing Zhou ◽  
Zhonghao Rao ◽  
Yijiang Wang ◽  
Xiaodong Zhao
2012 ◽  
Vol 450-451 ◽  
pp. 1633-1636
Author(s):  
Hung Ren Hsieh ◽  
Fang Jyun Yeh

This study has focused on post occupancy evaluation of green facade for elementary school classroom in Taiwan to appreciate the actual situations and usage problems for green facades. This study has chosen three schools for case study. Based on field measurement, and user interview and user questionnaire, they are being used to clarify the environment improvement contributed by green facade establishment and its effectiveness of environment education of each case. This study also found usage and maintenance and management problems derived from green facade installed. Results show that the effectiveness of green facades on the classroom indoor environment improvement is partial significant, on the environment education is not as good as anticipated and on the maintenance and management have many problems and some unexpected negative effects. According to the above results, this study proposes relative planning and designing suggestions as a reference for schools that are willing to have green facades establishment in the future.


Author(s):  
Lei Zhang ◽  
Xuan Ma ◽  
Jingyuan Zhao ◽  
Mengying Wang

With the development of the economy in China, the tourism industry has become a form of daily entertainment for citizens. Commercial pedestrianized blocks have been designed as recreational centers for tourists, serving as outdoor public space and scenic spots. The use of these regions is directly determined by the outdoor thermal environment. So far, few studies have been conducted on tourists’ thermal experience in commercial pedestrianized blocks, especially in the hot and humid region of southern China. Using field measurement and numerical simulation of a commercial pedestrianized block in Fo Shan, China, to research tourists’ thermal experience under different conditions, the final results of this study could help to select the most suitable time for tourist travel and help local managers to improve the thermal environment.


2020 ◽  
Vol 8 (5) ◽  
pp. 358 ◽  
Author(s):  
Yusak Oktavianus ◽  
Massoud Sofi ◽  
Elisa Lumantarna ◽  
Gideon Kusuma ◽  
Colin Duffield

A precast reinforced concrete (RC) T-beam located in seaport Terminal Peti Kemas (TPS) Surabaya built in 1984 is used as a case study to test the accuracy of non-destructive test techniques against more traditional bridge evaluation tools. This bridge is mainly used to connect the berth in Lamong gulf and the port in Java Island for the logistic purposes. The bridge was retrofitted 26 years into its life by adding two strips of carbon fiber reinforced polymer (CFRP) due to excessive cracks observed in the beams. Non-destructive field measurements were compared against a detailed finite element analysis of the structure to predict the performance of the girder in terms of deflection and moment capacity before and after the retrofitting work. The analysis was also used to predict the long-term deflections of the structure due to creep, crack distribution, and the ultimate moment capacity of the individual girder. Moreover, the finite element analysis was used to predict the deflection behavior of the overall bridge due to vehicle loading. Good agreement was obtained between the field measurement and the analytical study. A new service life of the structure considering the corrosion and new vehicle demand is carried out based on field measurement using non-destructive testing. Not only are the specific results beneficial for the Indonesian port authority as the stakeholder to manage this structure, but the approach detailed also paves the way for more efficient evaluation of bridges more generally over their service life.


2020 ◽  
Vol 33 (8) ◽  
pp. 2054-2071 ◽  
Author(s):  
Aurica Precupas ◽  
Daniela Gheorghe ◽  
Alina Botea-Petcu ◽  
Anca Ruxandra Leonties ◽  
Romica Sandu ◽  
...  

2011 ◽  
Vol 4 (2) ◽  
pp. 107-116 ◽  
Author(s):  
Yiwen Jian ◽  
Yujie Guo ◽  
Jian Liu ◽  
Zhen Bai ◽  
Qingrui Li

1990 ◽  
Vol 51 ◽  
pp. 29-36 ◽  
Author(s):  
A. Daghetti ◽  
S. Trasatti ◽  
I. Zagorska ◽  
Z. Koczorowski

Author(s):  
Ahmet Yilanci ◽  
Ibrahim Dincer ◽  
Harun Kemal Ozturk

In this paper, we undertake a study to investigate the performance of a hybrid photovoltaic-hydrogen system through energy and exergy efficiencies, improvement potential. This will help identify the irreversibilities (exergy destructions) for performance improvement purposes. Energetic and exergetic renewability ratios are also introduced for grid dependent hybrid energy systems. A case study is presented to highlight the importance of the thermodynamic parameters and show them using some actual and theoretical data. Three different energy demand options from photovoltaic panels to the consumer are identified and considered for the analysis. The minimum and maximum overall energy and exergy efficiencies of the system are calculated based on these options. It is found that the overall energy efficiency values of the system vary between 0.88% and 9.7% while minimum and maximum overall exergy efficiency values of the system are 0.77% and 9.3%, respectively. The monthly improvement potential of the system is also studied to investigate the seasonal performance.


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