مقالههای Ahmad Saboonchi
توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقالههای نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده میشوند.
۱Sensible Heat Transfer Share Impact on Energy and Water Consumption of Crossflow Wet Cooling Towers
اطلاعات انتشار: بیستمین کنفرانس سالانه مهندسی مکانیک، سال ۱۳۹۱
تعداد صفحات: ۴
Energy and water Consumption in an industrial wet cooling tower (WCT) involve a major part of energy consumption in any industry. To find different solution for decreasing the expense of WCTs, one should knows about the main parameters cause energy consumption. Sensible heat transfer share (SHS) is one of the main parameters which can explain most of thermal behavior of a WCT in different operation conditions. Therefore, by developing a numerical model for a crossflow WCT, the effects of SHS on water and energy consumption were investigated. Besides, some experimental test were done to evaluate the accuracy of model. The results showed that SHS has substantial effect on water evaporation and can be modified by inlet water temperature and fan speed if it`s possible. For instance, it was found that a 5 oC increase in inlet water temperature can increase the SHS by 10%. Further, it was shown that with the same increase in inlet water temperature, the required air flow rate and the evaporation rate can be decreased by 30% and 10% respectively with no decline in cooling rate<\div>
اطلاعات انتشار: International Journal of Advanced Design and Manufacturing Technology، سال ۱۳۸۹
تعداد صفحات: ۸
اطلاعات انتشار: International Journal of iron and steel society of Iran، دوم،شماره۲(پياپي ۳)، ۲۰۰۵، سال ۰
تعداد صفحات: ۶
The objectives in the cold rolling process include improved sheet surface quality, enhanced steel mechanical strength, and better solidification operations. Given the increasing demand for higher steel surface quality, more rapid production, and thinner steel plates, more attention has been directed toward the parameter of temperature in cold rolling as a means of achieving the above objectives. Due to the friction between work rolls and steel sheet caused during the cold rolling process and because of temperature changes of the work piece during plastic work, a non–uniform temperature distribution results along the work roll axial direction which ultimately leads to improper and undesirable expansion of the work roll along its axis. This, in turn, causes an uneven work roll slide on sheet surface; hence, the uneven and wavy steel surface. In this study, we used headers with a variety of nozzles for cooling the work rolls in order to achieve uniform temperature distribution and thermal expansion of the work roll. In this method, the cooling system is applied to the work roll in such a way that the work roll gains the desired efficiency in terms of both optimized energy consumption and work roll thermal expansion.
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