The Experts below are selected from a list of 8580 Experts worldwide ranked by ideXlab platform

Meysam Karami Rad - One of the best experts on this subject based on the ideXlab platform.

  • optimum thermal concentration of solar thermoelectric generators steg in realistic Meteorological Condition
    Energies, 2018
    Co-Authors: Meysam Karami Rad, Mahmoud Omid, Ali Rajabipour, Fariba Tajabadi, Lasse Rosendahl, Alireza Rezaniakolaei
    Abstract:

    Global warming and air pollution concerns make renewable energies inevitable. Thermoelectric (TE) generators—solid-state devices which can convert thermal energy into electricity—are one of the candidates to capture the energy of the sun’s rays. Impact of high thermal on flat panel Solar Thermoelectric Generator (STEG) performance is known. In this research, a method to optimize thermal concentration in realistic terrestrial Condition is introduced. To this end, a Simulink model of the STEG was developed, and module performance curves are determined. According to the results, Thermal concentration in realistic Condition is more than double, compared to standard Condition. The efficiency of the STEG was 4.5%, 6.8%, and 7.7% when the module figure of merit (ZT) was set to 0.8, 1.2, and 1.5, respectively, in locations with a higher ratio of diffused radiation (e.g., Aalborg and Denmark). These values corresponded to 70%, 106%, and 121% of the electrical power produced by parabolic troughs under the same Meteorological Condition. Furthermore, the possibility of controlling the ratio of heat and electricity in the cogeneration system is possible by controlling the heating flow or electric current. Heating flow can be controlled by the electrical current in STEG over 17 percent of its value in optimum Condition.

  • optimum thermal concentration of solar thermoelectric generators steg in realistic Meteorological Condition
    Energies, 2018
    Co-Authors: Meysam Karami Rad, Mahmoud Omid, Ali Rajabipour, Fariba Tajabadi, Lasse Rosendahl, Alireza Rezaniakolaei
    Abstract:

    Global warming and air pollution concerns make renewable energies inevitable. Thermoelectric (TE) generatorssolid-state devices which can convert thermal energy into electricityare one of the candi ...

Alireza Rezaniakolaei - One of the best experts on this subject based on the ideXlab platform.

  • optimum thermal concentration of solar thermoelectric generators steg in realistic Meteorological Condition
    Energies, 2018
    Co-Authors: Meysam Karami Rad, Mahmoud Omid, Ali Rajabipour, Fariba Tajabadi, Lasse Rosendahl, Alireza Rezaniakolaei
    Abstract:

    Global warming and air pollution concerns make renewable energies inevitable. Thermoelectric (TE) generators—solid-state devices which can convert thermal energy into electricity—are one of the candidates to capture the energy of the sun’s rays. Impact of high thermal on flat panel Solar Thermoelectric Generator (STEG) performance is known. In this research, a method to optimize thermal concentration in realistic terrestrial Condition is introduced. To this end, a Simulink model of the STEG was developed, and module performance curves are determined. According to the results, Thermal concentration in realistic Condition is more than double, compared to standard Condition. The efficiency of the STEG was 4.5%, 6.8%, and 7.7% when the module figure of merit (ZT) was set to 0.8, 1.2, and 1.5, respectively, in locations with a higher ratio of diffused radiation (e.g., Aalborg and Denmark). These values corresponded to 70%, 106%, and 121% of the electrical power produced by parabolic troughs under the same Meteorological Condition. Furthermore, the possibility of controlling the ratio of heat and electricity in the cogeneration system is possible by controlling the heating flow or electric current. Heating flow can be controlled by the electrical current in STEG over 17 percent of its value in optimum Condition.

  • optimum thermal concentration of solar thermoelectric generators steg in realistic Meteorological Condition
    Energies, 2018
    Co-Authors: Meysam Karami Rad, Mahmoud Omid, Ali Rajabipour, Fariba Tajabadi, Lasse Rosendahl, Alireza Rezaniakolaei
    Abstract:

    Global warming and air pollution concerns make renewable energies inevitable. Thermoelectric (TE) generatorssolid-state devices which can convert thermal energy into electricityare one of the candi ...

Cong-lan Cheng - One of the best experts on this subject based on the ideXlab platform.

  • Chemical composition and quantitative relationship between Meteorological Condition and fine particles in Beijing.
    Journal of environmental sciences (China), 2004
    Co-Authors: Jingli Wang, Yuanhang Zhang, Min Shao, Xu-lin Liu, Limin Zeng, Cong-lan Cheng
    Abstract:

    The recent year's monitor results of Beijing indicated that the pollution level of fine particles PM 2.5 showed an increasing trend. To understand pollution characteristics of PM 2.5 and its relationship with the Meteorological Conditions in Beijing, a one-year monitoring of PM 2.5 mass concentration and correspondent Meteorological parameters was performed in Beijing in 2001. The PM 2.5 levels in Beijing were very high, the annual average PM 2.5 concentration in 2001 was 7 times of the National Ambient Air Quality Standards proposed by US EPA. The major chemical compositions were organics, sulfate, crustals and nitrate. It was found that the mass concentrations of PM 2.5 were influenced by Meteorological Conditions. The correlation between the mass concentrations of PM 2.5 and the relative humidity was found. And the correlation became closer at higher relative humidity. And the mass concentrations of PM 2.5 were negtive-correlated to wind speeds, but the correlation between the mass concentration of PM 2.5 and wind speed was not good at stronger wind.

Yinchang Feng - One of the best experts on this subject based on the ideXlab platform.

  • impact of Meteorological Condition changes on air quality and particulate chemical composition during the covid 19 lockdown
    Journal of Environmental Sciences-china, 2021
    Co-Authors: Jing Ding, Qili Dai, Suqin Han, Yufen Zhang, Yinchang Feng
    Abstract:

    Abstract Stringent quarantine measures during the Coronavirus Disease 2019 (COVID-19) lockdown period (January 23, 2020 to March 15, 2020) have resulted in a distinct decrease in anthropogenic source emissions in North China Plain compared to the paralleled period of 2019. Particularly, 22.7% decrease in NO2 and 3.0% increase of O3 was observed in Tianjin, nonlinear relationship between O3 generation and NO2 implied that synergetic control of NOx and VOCs is needed. Deteriorating Meteorological Condition during the COVID-19 lockdown obscured the actual PM2.5 reduction. Fireworks transport in 2020 Spring Festival (SF) triggered regional haze pollution. PM2.5 during the COVID-19 lockdown only reduced by 5.6% in Tianjin. Here we used the dispersion coefficient to normalize the measured PM2.5 (DN-PM2.5), aiming to eliminate the adverse Meteorological impact and roughly estimate the actual PM2.5 reduction, which reduced by 17.7% during the COVID-19 lockdown. In terms of PM2.5 chemical composition, significant NO3− increase was observed during the COVID-19 lockdown. However, as a tracer of atmospheric oxidation capacity, odd oxygen (Ox = NO2 + O3) was observed to reduce during the COVID-19 lockdown, whereas relative humidity (RH), specific humidity and aerosol liquid water content (ALWC) were observed with noticeable enhancement. Nitrogen oxidation rate (NOR) was observed to increase at higher specific humidity and ALWC, especially in the haze episode occurred during 2020SF, high air humidity and obvious nitrate generation was observed. Anomalously enhanced air humidity may response for the nitrate increase during the COVID-19 lockdown period.

Jingli Wang - One of the best experts on this subject based on the ideXlab platform.

  • Chemical composition and quantitative relationship between Meteorological Condition and fine particles in Beijing.
    Journal of environmental sciences (China), 2004
    Co-Authors: Jingli Wang, Yuanhang Zhang, Min Shao, Xu-lin Liu, Limin Zeng, Cong-lan Cheng
    Abstract:

    The recent year's monitor results of Beijing indicated that the pollution level of fine particles PM 2.5 showed an increasing trend. To understand pollution characteristics of PM 2.5 and its relationship with the Meteorological Conditions in Beijing, a one-year monitoring of PM 2.5 mass concentration and correspondent Meteorological parameters was performed in Beijing in 2001. The PM 2.5 levels in Beijing were very high, the annual average PM 2.5 concentration in 2001 was 7 times of the National Ambient Air Quality Standards proposed by US EPA. The major chemical compositions were organics, sulfate, crustals and nitrate. It was found that the mass concentrations of PM 2.5 were influenced by Meteorological Conditions. The correlation between the mass concentrations of PM 2.5 and the relative humidity was found. And the correlation became closer at higher relative humidity. And the mass concentrations of PM 2.5 were negtive-correlated to wind speeds, but the correlation between the mass concentration of PM 2.5 and wind speed was not good at stronger wind.