Saturated Air

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The Experts below are selected from a list of 195 Experts worldwide ranked by ideXlab platform

Weifang Luo - One of the best experts on this subject based on the ideXlab platform.

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

  • Estimation of Mixing Ratio for Saturated Air over Water
    Chemical Engineering & Technology, 2012
    Co-Authors: Alireza Bahadori, Sohrab Zendehboudi, Gholamreza Zahedi
    Abstract:

    The role that water vapor plays in atmospheric phenomena is extremely important. Saturation of moist Air at a given temperature and pressure occurs if its mixing ratio is such that the moist Air can coexist in a stable condition with an associated condensed phase at the same temperature and pressure. The saturation mixing ratio is useful to calculate the relative humidity which is a ratio, expressed in percent, of the amount of water vapor in the Air (actual mixing ratio) compared to the amount of water vapor the Air can hold (saturation mixing ratio). In this work, an attempt has been made to develop a simple-to-use Arrhenius-type function to estimate the mixing ratio for Saturated Air over water as a function of pressure and temperature. Estimations have been found to be in excellent agreement with the data reported in the literature, with the average absolute deviation being around 0.4 %

  • prediction of Saturated Air dew points at elevated pressures using a simple arrhenius type function
    Chemical Engineering & Technology, 2011
    Co-Authors: Alireza Bahadori
    Abstract:

    In compressed Air systems, condensed water vapor can have corrosive effects on metals and wash out protective lubricants from tools, equipments, and pneumatic devices. Therefore, it is necessary to be able to predict the dew point temperature of atmospheric Air and the Air dew point at elevated pressures in order to design and apply the appropriate type of drying. A simple tool is presented here for the prediction of the dew point of atmospheric moist Air as a function of temperature and relative humidity and of the compressed Saturated Air dew point as a function of pressure and dew point of atmospheric moist Air at a given temperature using an Arrhenius-type asymptotic exponential function. The developed tool can be of immense practical value for engineers and scientists as a quick check of the dew points of atmospheric moist Air and relative humidity and compressed Saturated Air under various conditions.

  • Prediction of Saturated Air Dew Points at Elevated Pressures Using a Simple Arrhenius‐Type Function
    Chemical Engineering & Technology, 2011
    Co-Authors: Alireza Bahadori
    Abstract:

    In compressed Air systems, condensed water vapor can have corrosive effects on metals and wash out protective lubricants from tools, equipments, and pneumatic devices. Therefore, it is necessary to be able to predict the dew point temperature of atmospheric Air and the Air dew point at elevated pressures in order to design and apply the appropriate type of drying. A simple tool is presented here for the prediction of the dew point of atmospheric moist Air as a function of temperature and relative humidity and of the compressed Saturated Air dew point as a function of pressure and dew point of atmospheric moist Air at a given temperature using an Arrhenius-type asymptotic exponential function. The developed tool can be of immense practical value for engineers and scientists as a quick check of the dew points of atmospheric moist Air and relative humidity and compressed Saturated Air under various conditions.

  • Estimation of Saturated Air water content at elevated pressures using simple predictive tool
    Chemical Engineering Research and Design, 2011
    Co-Authors: Alireza Bahadori, Hari B. Vuthaluru
    Abstract:

    Abstract In a compressed Air system, condensed water vapor can have corrosive effects on metals and wash out protective lubricants from tools, equipments and pneumatic devices. To protect against such undesirable effects in a compressed Air system, it is necessary to be able to predict the water content of Air in order to design and apply the appropriate type of drying to be used in the system. In this work, a simple predictive tool, which is easier than currently available models and involves a fewer number of parameters, requiring less complicated and shorter computations, is presented here for the prediction of water content of Air as a function of temperature and relative humidity as well as for compressed Saturated Air as a function of pressure and temperature using an Arrhenius-type asymptotic exponential function. The proposed method predicts the amount of Air water content for temperatures up to 45 °C, pressures up to 1400 kPa and relative humidities up to 100%. Estimations are found to be in excellent agreement with the reliable data in the literature with average absolute deviation being less than 1.4 and 2.2% for atmospheric Air and Saturated compressed Air, respectively. The tool developed in this study can be of immense practical value for engineers and scientists to have a quick check on the water content of atmospheric Air and Saturated compressed Air at various conditions without opting for any experimental measurements. In particular, engineers and scientists would find the approach to be user-friendly with transparent calculations involving no complex expressions.

S. Luo - One of the best experts on this subject based on the ideXlab platform.

Ted B. Flanagan - One of the best experts on this subject based on the ideXlab platform.

Helen Treichel - One of the best experts on this subject based on the ideXlab platform.

  • operation of a fixed bed bioreactor in batch and fed batch modes for production of inulinase by solid state fermentation
    Biochemical Engineering Journal, 2011
    Co-Authors: Viviane Astolfi, Jaderson Joris, Ricardo Verlindo, Vladimir J Oliveira, Francisco Maugeri, Marcio A Mazutti, Debora De Oliveira, Helen Treichel
    Abstract:

    Abstract This work is focused on the inulinase production by solid-state fermentation (SSF) in a fixed-bed reactor (34 cm diameter and 50 cm height) with working capacity of 2-kg of dry substrate operated in batch and fed-batch modes. It was investigated different strategies for feeding the inlet Air in the bioreactor (Saturated and unSaturated Air) as alternative to remove the metabolic heat generated during the microbial growth by evaporative cooling. The kinetic evaluation of the process carried out in batch mode using unSaturated Air showed that the evaporative cooling decreasing the mean temperature of the solid-bed, although the enzyme production was lower than that obtained using Saturated Air. Results showed that maximum enzyme activity (586 ± 63 U gds −1 ) was obtained in the fed-batch mode using Saturated Air after 24 h of fermentation. The enzymatic extract obtained by fed-batch mode was characterized and presented optimum temperature and pH in the range of 52–57 °C and 4.8–5.2, respectively. For a temperature range from 40 to 70 °C the enzyme presented decimal reduction time, D -value, ranging from 5748 to 47 h, respectively. For a pH range from 3.5 to 5.5 the enzyme showed good stability, presenting D -values higher than 2622 h. In terms of Michaelis–Mentem parameters were demonstrated that the crude inulinase activity presented higher affinity for substrate sucrose compared to inulin.

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