نتایج جستجو برای: temperature difference
تعداد نتایج: 853317 فیلتر نتایج به سال:
Owing to its high efficiency and specific refrigeration power, elastocaloric is a promising technology that potentially endowed with replacing the conventional steam compression refrigeration. Here, experimental results on cooling process of natural rubber are presented, achieving maximum temperature drop during unloading 41.30 K difference 68 between hot cold ends at an ambient 253.13 K. Moreo...
We present new microTEGs based on doped Bi2Te3 thin films deposited polyimide membrane able to operate under a temperature difference as high 280 K. developed two with different designs obtain the lowest internal resistance possible. The thermoelectrical properties coupled low contact lead an open circuit voltage of 64 mV and maximum output power 36 µW 206 Such cannot be in bulk commercial TEG ...
[1] We compare the results of the cloud thermodynamic phase detections that use (1) the ratio of the near-infrared and visible bands or (2) the brightness temperature difference of two thermal infrared bands. We find that the brightness temperature difference algorithm using the Moderate Resolution Imaging Spectroradiometer (MODIS) bands is generally consistent with the expectations based on th...
Mathematical models for water quality problems in rivers and streams are now an efficient tool in water resources management. Their basic principle is the differential equation of pollution transport, which can be integrated both in analytical and numerical form. From this equation the broad category of “fickian” models has been developed. The numerical procedures available so far are the finit...
the present study was conducted to investigate the role of summary in teaching grammar process on pre-university students. to this end, 48 male pre-university students in semnan were participants. they were math class that we called experimental group and science class as control group. in order to make sure there was no significant difference in proficiency level of two groups. a pre-test wa...
in this paper, the effect of size on melting temperature of metallic nanoparticles (au, pb and bi) is theoretically simulated and explained. in this regard, the cause of difference in various experimental data is introduced, which is the difference between nanoparticles’ grain gaussian distribution. this volume-depended model with the help of the gaussian distribution can describe the relation ...
.............................................................................................................................................. III ACKNOWLEDGMENTS ......................................................................................................................... IV CHAPTER 1 INTRODUCTION .......................................................................
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