Study on Improving Thermal Environment of College Dormitory in Chongqing

2012 ◽  
Vol 610-613 ◽  
pp. 2849-2853
Author(s):  
Hong Yin Ou ◽  
Fang Liu ◽  
Qing Long Song ◽  
Long Xing Yu
Keyword(s):  
Field Test ◽  
Indoor Environment ◽  
Thermal Environment ◽  
Air Velocity ◽  
Thermal Discomfort ◽  
Indoor Thermal Environment ◽  
Simulation Results

To improve the low air velocity above the bed areas during the night in hot summer, the reformed plan for the college dormitory fan was presented.The indoor environment was simulated by the software Airpak3.0 to compaire the fan with both no diversion deflector and diversion deflector (the deflector angles are 60°, 120° and 160°) respectively. And a field test was conducted to confirm the simulation results. The results show that the indoor thermal environment above the bed areas has been improved inordinately if adding a deflector with different angles. The air velocity can be increased by 0.15m/s at most when the deflector angle is 160°, yet the airflow displays most evenly with the 120° deflector angle. Meanwhile, the temperature and thermal discomfort have been decreased. The variation of the simulation and measurement values tends to be consistent, so it suggests the fan installing the diversion deflector may improve the thermal environment of college dormitory.

scholarly journals Thermophysiological Comfort of Surgeons and Patient in an Operating Room Based on PMV-PPD and PHS Indexes

2020 ◽  
Vol 10 (5) ◽  
pp. 1801 ◽  
Author(s):  
Radostina A. Angelova ◽  
Rositsa Velichkova
Keyword(s):  
At Risk ◽  
Relative Humidity ◽  
Operating Room ◽  
Air Temperature ◽  
Indoor Environment ◽  
Thermal Environment ◽  
Climatic Conditions ◽  
Clothing Insulation ◽  
Indoor Thermal Environment ◽  
Predicted Heat Strain

There are different actors in an operating room (OR), who have controversial requirements for the indoor thermal environment. While the patient is at risk of perioperative hypothermia, the surgeons are in a state of thermophysiological discomfort. The study presents an analysis of the thermophysiological comfort of both patient and surgeons in an OR. Surgical clothing ensembles with three values of clothing insulation are simulated. Different indoor environment conditions (air temperature and relative humidity) are tested. The analysis is based on the calculation of predicted mean vote and predicted percentage of dissatisfied (PMV-PPD) indexes and assessment of the climatic conditions categories. Discussion of the predicted heat strain is also presented. The simulated results and their analysis show considerable discrepancies between the thermophysiological comfort of the patient and the surgeons, even when dressed in a light protective ensemble, in the same indoor environment.

scholarly journals Reconstruction and optimization methods of old university teaching buildings

2020 ◽  
Vol 165 ◽  
pp. 04033
Author(s):  
Shao Siyu
Keyword(s):  
Indoor Environment ◽  
Thermal Environment ◽  
Optimization Methods ◽  
Energy Allocation ◽  
University Teaching ◽  
Teaching Mode ◽  
Modern Education ◽  
Indoor Thermal Environment ◽  
Existing Problems ◽  
Aging Phenomenon

This paper mainly studies the reconstruction of the old teaching building in China. There are many buildings in our country, aging phenomenon is serious, indoor teaching mode is not suitable for modern education. Through the analysis of the main existing problems of indoor environment, the paper puts forward the suitable renovation scheme from the aspects of energy allocation, indoor thermal environment and comfort, so as to make the teaching building suitable for the use of modern education.

scholarly journals Relation between indoor thermal environment and renovation in liege residential buildings

2014 ◽  
Vol 18 (3) ◽  
pp. 889-902 ◽  
Author(s):  
Manoj Singh ◽  
Sadhan Mahapatra ◽  
Jacques Teller
Keyword(s):  
Indoor Environment ◽  
Thermal Environment ◽  
Residential Buildings ◽  
Area Ratio ◽  
Building Envelope ◽  
Efficiency Improvement ◽  
Environment Monitoring ◽  
Indoor Temperature ◽  
Indoor Thermal Environment ◽  
Energy Efficiency Improvement

Indoor thermal environment monitoring has been done in 20 residential buildings of Liege city followed by questionnaire based comfort survey amongst the occupants of 85 houses in order to record their preference and expectations about indoor thermal environment in winter and spring season. It is found from the analysis that change of glazing has a minimum or even sometimes an adverse effect on the existing indoor environment due to the absence of proper insulation of the rest of the building envelope. It is observed that in winter there is a sudden drop in indoor temperature and also overheating in summer. This is due to unplanned installation of glazing which actually increases the fenestration area ratio leading to higher indoor temperature fluctuation and causes discomfort. It is also important that the occupant?s preference and expectations as well as overall assessment of indoor environment needs to be consider towards energy efficiency improvement.

Indoor Thermal Environment Simulation by Using MATLAB and Simulink

2010 ◽  
Vol 29-32 ◽  
pp. 2785-2788
Author(s):  
Jian Yao ◽  
Jin Xu
Keyword(s):  
Energy Efficient ◽  
Indoor Environment ◽  
Thermal Environment ◽  
Building Envelope ◽  
Cold Winter ◽  
Performance Simulation ◽  
Application Study ◽  
Indoor Thermal Environment ◽  
Energy Efficient Buildings ◽  
Environment Simulation

To compare the indoor thermal environment under different building envelope constructions, a Matlab-based tool was presented for building envelope performance simulation. An application study of two cases illustrates energy efficient buildings can provide more suitable indoor environment than non-energy efficient buildings in cold winter and hot summer. In conclusion, this paper provides a new and fast way for the prediction of indoor thermal environment.

scholarly journals Thermal environment assessment in selected Polish educational buildings

2021 ◽  
Vol 246 ◽  
pp. 15004
Author(s):  
Luiza Dębska ◽  
Justyna Krakowiak
Keyword(s):  
Indoor Air ◽  
Thermal Environment ◽  
Thermal Sensation ◽  
Subjective Assessment ◽  
Thermal Preference ◽  
Air Velocity ◽  
Indoor Thermal Environment ◽  
Environment Assessment ◽  
Educational Buildings ◽  
The City

The paper presents experimental results of a study on indoor thermal environment in selected educational buildings located in the city of Kielce (Poland). The volunteers in the investigated rooms were asked to fill in the anonymous questionnaires containing questions on their thermal sensation, thermal preference and thermal acceptability votes as well as humidity assessment and humidity preference votes. In total, 83 people completed the questionnaires. Simultaneously, the indoor air parameters were measured with a microlimate meter equipped with precision sensors to measure air and globe temperatures, air velocity and relative humidity. The analysis of the obtained results provides information on the subjective assessment of the thermal environment in the considered rooms. It allowed to assess whether the guidelines given in the standard are consistent with the real feeling of comfort of the respondents. Research in the performed scope has shown that the feelings of the respondents and the standard guidelines diverge. It was noticed that that the subjects definitely felt better in the rooms where the temperature was around 22.5°C. The subjects felt worse at the temperature of 25.3°C and the worst of 27.6°C.

Numerical Simulation of Thermal Environment in High Heat Tunnel

2012 ◽  
Vol 516-517 ◽  
pp. 519-523
Author(s):  
Qiang Che
Keyword(s):  
Numerical Simulation ◽  
Thermal Damage ◽  
Thermal Environment ◽  
High Heat ◽  
Mine Safety ◽  
Safety Regulation ◽  
Air Velocity ◽  
Coal Mine Safety ◽  
Field Temperature ◽  
Simulation Results

With the increasing depth of coal mining, problems of high temperature thermal damage in mine become more and more serious. A high heat tunnel thermal environment case is numerical simulated in the presented work, PMV (Predicted Mean Vote) indices are using to predict the thermal comfort of environment, velocity field, temperature field and PMV values field in high heat tunnel had been obtained. The simulation results indicated while the inlet air velocity is 0.7 m/s, the temperatures in most tunnel area are below 26 °C and the thermal environment conforms to the Coal Mine Safety Regulation in China.

Analysis of Internet Bar Use Evaporative Air-Conditioning and Ventilation of Thermal Comfort

2011 ◽  
Vol 393-395 ◽  
pp. 1106-1109
Author(s):  
Huang Xiang ◽  
Wei Wang ◽  
Sheng Wu
Keyword(s):  
Relative Humidity ◽  
Air Conditioning ◽  
Thermal Environment ◽  
Internal Heat ◽  
Air Velocity ◽  
Factors Affecting ◽  
Indoor Thermal Environment ◽  
Heat Sensation ◽  
Environment Quality ◽  
Sensitivity Factors

The factors affecting indoor thermal environment are briefly introduced in this article, and one Internet bar was tested and analyzed that used evaporative air-conditioning in lanzhou, gansu. Meanwhile, through the air temperature, the relative humidity and air velocity of sensitivity factors were analyzed that heat sensation to human body, changed the heat sensation for people's from qualitative to the quantitative. As one way and the basis has provided for the improvement room internal heat environment quality.

Analysis on Built Environment in Underground Shopping Malls in Chongqing in P.R. China

2012 ◽  
Vol 599 ◽  
pp. 233-236 ◽  
Author(s):  
Wen Jie Li ◽  
Xin Xue Liao ◽  
Gao Yang Miao ◽  
Xin Zhi Zhou
Keyword(s):  
Air Quality ◽  
Built Environment ◽  
Thermal Comfort ◽  
Field Test ◽  
Thermal Environment ◽  
Current Situation ◽  
Shopping Mall ◽  
Shopping Malls ◽  
Indoor Thermal Environment ◽  
Sound Environment

To identify current situation of built environment in underground shopping malls, the study based on both field test and questionnaire investigation was carried out in underground shopping mall A and B in Chongqing in P.R. China. It analyzed the current situation of indoor thermal environment, light environment, sound environment as well as air quality. It found that the most prominent issue was indoor ventilation, and then air quality, thermal comfort and noise sequentially. Light and moisture problem was easy to be overlooked. Based on the current issues, it puts forward several measures to improve the built environment of underground shopping malls in this study.

Comfort Fusion Evaluation of the Indoor Thermal Environment Based on KPCA and Genetic Neural Network

2013 ◽  
Vol 448-453 ◽  
pp. 204-208
Author(s):  
Lian Zhang ◽  
Xiao Qian Hu ◽  
Shan Li
Keyword(s):  
Thermal Environment ◽  
Principal Component ◽  
High Accuracy ◽  
Comfort Level ◽  
Kernel Principal Component Analysis ◽  
Indoor Thermal Environment ◽  
Comfort Index ◽  
Sample Data ◽  
Genetic Neural Network ◽  
Simulation Results

For the problem of complicated nonlinear relationships among the parameters of heat comfort index PMV, KPCA (Kernel Principal Component Analysis) is used to do the feature extraction. On the basis, KPCA+BP and KPCA+GNN are utilized to forecast the heat comfort level. Simulation results show that KPCA can extract the nonlinear uncorrelated sample data, and KPCA+GNN are evaluated best with high accuracy.

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