Study on the improvement of indoor hot and humid environment in Tibetan-style residential areas in northwest Sichuan

Indoor and outdoor thermal environment is under a definite impact on the human body, and to a large extent affects the comfort of people living. In this paper, the indoor and outdoor thermal and humidity parameters of Dongma village in the west of Sichuan Province were measured. On the living room and bedroom hot and humid comfort survey, the outside wall temperature and the local climate to do analysis, get January Dongma village typical residential indoor humidity environment, including the temperature of the living room is 6.6~19.5°C, the relative humidity is 28.9~45.3%rH, the bedroom temperature is 3.5~19.8°C, the relative humidity is 35.7~52.8%rH, the outdoor temperature is 2.4~27.4°C, the temperature in the east is -11.1~-3.3°C, -3.9~11.2°C at the west, -8~2.8°C at the south, -10.4~-2.5 °C at the north, 1.6~29.2 °C at the roof, and the solar radiation intensity is 422~739W/m^2. Combined with the above data, it is found that the overall insulation performance of the wall is good, but by the influence of the cold weather outside, the indoor temperature is still low, it is difficult to respond to the comfort needs of residents. The wall temperature is altered due to solar radiation. In view of the current situation of the indoor thermal environment in Dongma village, a series of optimization suggestions are submitted at the end of the paper.

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Thermal Environment of Traditional Dwelling Houses in Dry Hot and Dry Cold Climate Zone of China in Winter

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.178 ◽

2011 ◽

Vol 243-249 ◽

pp. 178-183

Author(s):

Deng Jia Wang ◽

Yan Feng Liu ◽

Jia Ping Liu ◽

Jing Hua Liu

Keyword(s):

Thermal Environment ◽

Good Practice ◽

Gansu Province ◽

Cold Climate ◽

Brick Wall ◽

Indoor Temperature ◽

Indoor Thermal Environment ◽

Solar Radiation Intensity ◽

Wind Chill Index ◽

Indoor And Outdoor

In order to master the indoor thermal environment of the traditional dwelling houses in dry hot and dry cold climate zones in winter, the east Gansu province is taken for example to study. Indoor and outdoor air temperature, relative humidity, solar radiation intensity and wind speed were obtained by using field-tested methods for the traditional dwelling houses in this region in winter, and the clothing form and activity of people were surveyed by way of questionnaire. And then, the influence of house orientation, indoor heat sources and insulation on the indoor thermal environment is analyzed, the WCI (wind chill index) is used to evaluate the indoor and outdoor thermal environment at last. The results show that: the indoor temperature can raise about 8.3 °C when the house orientation is better and Chinese kang as the heating heat source. The good practice on local structure is worthy of following for other houses, such as adobe posted solid brick wall, double windows, wooden sash windows and so on. However, people still feel very cool or cold about the indoor temperature for much of the day, and even people feel very cold for 5% of the day. At the end of thesis, some methods about the indoor thermal environment improvement are proposed.

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Study on Thermal Environment of Direct Gain Solar and Heating Rooms

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.291-294.1101 ◽

2013 ◽

Vol 291-294 ◽

pp. 1101-1106

Author(s):

Lin Bo Chen ◽

Jia Ping Liu ◽

Wei Hua Zhang

Keyword(s):

Relative Humidity ◽

Surface Temperature ◽

Indoor Air ◽

Thermal Environment ◽

Thermal Sensation ◽

Human Action ◽

The South ◽

The North ◽

Inner Surface ◽

Indoor And Outdoor

The indoor thermal environment usually is measured in the condition of heating or cooling. This paper studies the thermal environment in direct gain solar and heating rooms. The indoor and outdoor temperature and relative humidity, inner surface temperature, human action, and times of opening door per day, are field tested and analyzed. PMV index is used to evaluate thermal environment. The results show that the relative humidity in direct gain solar and heating rooms is too low to comfortable. The curtain from closed to open, the window inner surface temperature decreases 13.9 °C in north orientation room, and decrease 10.3 °C in south orientation room. The indoor air temperature, relative humidity and inner surface temperature at the height of 1.5 m change a little by normal opening door. Thermal environment evaluation proves that in cloudy day, north orientation room is more comfortable than the south orientation room, while in sunny day, their difference of thermal sensation decreases. So we suggest that in order to keep thermal comfort, the curtain should be closed on the condition of no solar energy, the relative humidity should be designed during heating design, and the facing correction factors should be revised, so that the south orientation room is comfort in cloudy day. For energy conservation, the north exterior window should be smaller than the south exterior window.

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EFFECT OF SOLAR RADIATION INTENSITY ON THE VEGETATIVE GROWTH AND YIELD OF COFFEE

The Journal of Agriculture of the University of Puerto Rico ◽

10.46429/jaupr.v26i4.13586 ◽

1969 ◽

Vol 26 (4) ◽

pp. 73-90

Author(s):

J. Guiscafré Arrillaga ◽

Luis A. Gómez

Keyword(s):

Soil Moisture ◽

Relative Humidity ◽

Solar Radiation ◽

Ecological Factors ◽

The Other ◽

Growth And Yield ◽

Full Sunlight ◽

Solar Radiation Intensity ◽

Yearly Average ◽

One Year

Tn this study, four ecological factors were observed: solar radiation, air temperature, relative humidity and soil moisture. Of the four, solar radiation fluctuates more than any other and undoubtedly the other threefactors are influenced by solar radiation to a great extent. 1—Solar radiation varies widely with season and year. 2—The greatest intensity takes place during the months of June to September and the lowest from November to February. 3—The greatest intensity recorded under full sunlight was 1.91 gr. cal./ min./ cm.2 and the lowest was 1.35 gr. cal./ min./ cm.2. 4—The yearly average solar radiation under full sunlight was 144,754. 40 gr. cal./ cm.2. 5—The cumulative radiation for the 3 years that lasted the experiment was 434,263.20 gr. cal./ cm.2, under full sunlight. 6—Shade regulates solar radiation making it more uniform from one year to the other. 7-As solar radiation increases, growth and yield of coffee decrease. 8—Yield, and growth of coffee were definitely higher under 1/2 and 1/3 than under 2/3 and full sunlight. 9—Statistically significant differences in yield, were not found between plots with 1/2 and 1/3 sunlight. Growth was significantly higher under 1/3 exposure. 10—Radiation, produces distinctive formative effects on coffee. Plants under full sunlight were very weak, chlorotie and poorly developed. 11—Four ecological factors were measured: solar radiation, temperature, relative humidity and soil moisture. All are affected by radiation to a great extent, but other factors as vegetation have also some effect. 12—Solar radiation is negatively correlated with yields and growth. 13—Growth and yields are positively correlated. As expected low temperature and yield are associated and soil moisture acts independently in relation to growth. 14—Plants under full sunlight accumulated greater amounts of nitrogen and potash and to a less extent of phosphorous than under any other exposure. 15—An average of 53,143.20 gram calories per square centimeter per year is the optimum cumulative solar radiation for yield and growth of coffee. This amount is obtainable under natural shade of Guaba trees (Inga Inga) planted at not less than 16 x 16 feet.

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Mathematical Relationship between Solar Radiation Intensity and Exterior Wall Temperature

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.424-425.364 ◽

2012 ◽

Vol 424-425 ◽

pp. 364-368

Author(s):

Yong An Ao ◽

Liang Peng ◽

Dan Che ◽

Qian Zhang ◽

Yu Wen Li ◽

...

Keyword(s):

Solar Radiation ◽

Wall Temperature ◽

Radiation Intensity ◽

Heat Load ◽

Research Direction ◽

Measured Data ◽

Exterior Wall ◽

Mathematical Relationship ◽

Solar Radiation Intensity ◽

Building Heat

Explore the mathematic relationship between solar radiation intensity and exterior wall temperature according to empirical formula calculation, the measured data and software fitting. Propose a preliminary function between the intensity and the temperature, and analyze the research direction in the future. Attain the conclusion of using exterior wall temperature instead of the current sol-air temperature to calculate the building heat load could save more energy

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Detrended Multiple Cross-Correlation Coefficient applied to solar radiation, air temperature and relative humidity

Scientific Reports ◽

10.1038/s41598-019-56114-6 ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 2

Author(s):

Andrea de Almeida Brito ◽

Heráclio Alves de Araújo ◽

Gilney Figueira Zebende

Keyword(s):

Relative Humidity ◽

Solar Radiation ◽

Solar Energy ◽

Correlation Coefficient ◽

Air Temperature ◽

Cross Correlation ◽

Global Solar Radiation ◽

Meteorological Variables ◽

Hourly Data ◽

Cross Correlations

AbstractDue to the importance of generating energy sustainably, with the Sun being a large solar power plant for the Earth, we study the cross-correlations between the main meteorological variables (global solar radiation, air temperature, and relative air humidity) from a global cross-correlation perspective to efficiently capture solar energy. This is done initially between pairs of these variables, with the Detrended Cross-Correlation Coefficient, ρDCCA, and subsequently with the recently developed Multiple Detrended Cross-Correlation Coefficient, $${\boldsymbol{DM}}{{\boldsymbol{C}}}_{{\bf{x}}}^{{\bf{2}}}$$DMCx2. We use the hourly data from three meteorological stations of the Brazilian Institute of Meteorology located in the state of Bahia (Brazil). Initially, with the original data, we set up a color map for each variable to show the time dynamics. After, ρDCCA was calculated, thus obtaining a positive value between the global solar radiation and air temperature, and a negative value between the global solar radiation and air relative humidity, for all time scales. Finally, for the first time, was applied $${\boldsymbol{DM}}{{\boldsymbol{C}}}_{{\bf{x}}}^{{\bf{2}}}$$DMCx2 to analyze cross-correlations between three meteorological variables at the same time. On taking the global radiation as the dependent variable, and assuming that $${\boldsymbol{DM}}{{\boldsymbol{C}}}_{{\bf{x}}}^{{\bf{2}}}={\bf{1}}$$DMCx2=1 (which varies from 0 to 1) is the ideal value for the capture of solar energy, our analysis finds some patterns (differences) involving these meteorological stations with a high intensity of annual solar radiation.

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Solar Radiation, Air Temperature, Relative Humidity, and Dew Point Study: Damak, Jhapa, Nepal

International Journal of Photoenergy ◽

10.1155/2019/8369231 ◽

2019 ◽

Vol 2019 ◽

pp. 1-7 ◽

Cited By ~ 1

Author(s):

Arun Kumar Shrestha ◽

Arati Thapa ◽

Hima Gautam

Keyword(s):

Relative Humidity ◽

Solar Radiation ◽

Air Temperature ◽

Gaussian Function ◽

Great Influence ◽

Dew Point ◽

Upward Trend ◽

Summer Maximum ◽

Online Calculator ◽

Climatic Phenomenon

Monitoring and prediction of the climatic phenomenon are of keen interest in recent years because it has great influence in the lives of people and their environments. This paper is aimed at reporting the variation of daily and monthly solar radiation, air temperature, relative humidity (RH), and dew point over the year of 2013 based on the data obtained from the weather station situated in Damak, Nepal. The result shows that on a clear day, the variation of solar radiation and RH follows the Gaussian function in which the first one has an upward trend and the second one has a downward trend. However, the change in air temperature satisfies the sine function. The dew point temperature shows somewhat complex behavior. Monthly variation of solar radiation, air temperature, and dew point shows a similar pattern, lower at winter and higher in summer. Maximum solar radiation (331 Wm-2) was observed in May and minimum (170 Wm-2) in December. Air temperature and dew point had the highest value from June to September nearly at 29°C and 25°C, respectively. The lowest value of the relative humidity (55.4%) in April indicates the driest month of the year. Dew point was also calculated from the actual readings of air temperature and relative humidity using the online calculator, and the calculated value showed the exact linear relationship with the observed value. The diurnal and nocturnal temperature of each month showed that temperature difference was relatively lower (less than 10°C) at summer rather than in winter.

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Linking variations in sea spray aerosol particle hygroscopicity to composition during two microcosm experiments

10.5194/acp-2016-36 ◽

2016 ◽

Author(s):

Sara D. Forestieri ◽

Gavin C. Cornwell ◽

Taylor M. Helgestad ◽

Kathryn A. Moore ◽

Christopher Lee ◽

...

Keyword(s):

Light Scattering ◽

Relative Humidity ◽

Salt Content ◽

Sea Salt ◽

Sea Spray ◽

Hygroscopic Growth ◽

Phytoplankton Blooms ◽

Aerosol Composition ◽

Sea Spray Aerosol ◽

Indoor And Outdoor

Abstract. The extent to which water uptake influences the light scattering ability of marine sea spray aerosol (SSA) particles depends critically on SSA chemical composition. The organic fraction of SSA can increase during phytoplankton blooms, decreasing the salt content and therefore the hygroscopicity of the particles. In this study, subsaturated hygroscopic growth factors at 85 % relative humidity (GF(85 %)) of SSA particles were quantified during two induced phytoplankton blooms in marine aerosol reference tanks (MARTs). One MART was illuminated with fluorescent lights and the other was illuminated with sunlight, referred to as the "indoor" and "outdoor" MARTs, respectively. GF(85 %) values for SSA particles were derived from measurements of light scattering and particle size distributions, concurrently with online single particle and bulk aerosol composition measurements. During both microcosm experiments, the observed bulk average GF(85 %) values were depressed substantially relative to pure, inorganic sea salt, by 10 to 19 %, with a one (indoor MART) and six (outdoor MART) day lag between GF(85 %) depression and the peak chlorophyll-a concentrations. The fraction of organiccontaining SSA particles generally increased after the peak of the phytoplankton blooms. The GF(85 %) values were inversely correlated with the fraction of particles containing organic or other biological markers. This indicates these particles were less hygroscopic than the particles identified as predominately sea salt containing and demonstrates a clear relationship between SSA particle composition and the sensitivity of light scattering to variations in relative humidity. The implications of these observations to the direct climate effects of SSA particles are discussed.

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A Field Study on the Indoor Thermal Environment of the Airport Terminal in Tibet Plateau in Winter

Journal of Engineering ◽

10.1155/2017/7196184 ◽

2017 ◽

Vol 2017 ◽

pp. 1-13 ◽

Cited By ~ 1

Author(s):

Jianglong Zhen ◽

Jun Lu ◽

Guangqin Huang ◽

Liyue Zeng ◽

Jianping Lin ◽

...

Keyword(s):

Relative Humidity ◽

Thermal Environment ◽

Vertical Direction ◽

Outer Zone ◽

Tibet Plateau ◽

Indoor Thermal Environment ◽

Airport Terminal ◽

Globe Temperature ◽

Environment Parameters ◽

Radiant Floor Heating

In order to study the characteristics of indoor thermal environment in the airport terminal in Tibet Plateau with radiant floor heating in winter, a field measurement of the indoor thermal environment was conducted in Lhasa Gonggar Airport terminal 2. First, the unique climate characteristics in Tibet Plateau were analyzed through comparison of meteorological parameters in Beijing and Lahsa. The thermal environment in the terminal was divided into outer zone and inner zone as well as south zone and north zone. Thermal environment parameters including air temperature, black globe temperature, relative humidity in each zone, and inner surface temperature of envelope were measured and analyzed. Meanwhile, temperature and relative humidity in the vertical direction were measured. In addition, PMV and PPD were calculated for evaluating the thermal environment in the terminal. The findings can provide guidance for the design and regulation of thermal environment in terminals in Tibet Plateau in China.

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