مدلسازي نقطه پينچ در دماهاي مختلف با استفاده از نرم افزارهاي Aspen Hysis و Aspen Energy Analyzer در واحد پتروشيمي

Modeling of Pinch Point at various tempretures usingAspen Hysis and Aspen Energy Analyzer softwares in a petrochemistry unit

با توجه به رشد جمعيت و از طرفي افزايش روز افزون مصرف منابع انرژي در شاخه هاي گوناگون خانگي و صنعتي و همچنين با توجه به محدوديت منابع انرژي تجديدناپذير، ناگزير به كاهش و اصلاح مصرف انرژي هستيم. تجزيه و تحليل پينچ يك فرايند صنعتي، براي مشخص كردن هزينه انرژي و هزينه اصلي شبكه تبادلگرهاي حرارتي و همچنين تعيين نقطه پينچ بكار مي رود. محاسبات اقتصادي مربوط به هزينه هاي عملياتي(انرژي) و هزينه كل انجام گرديد. با اصلاح شبكه مبدل حرارتي فوق (طراحي رتروفيت) و با ميزان سرمايه اوليه 104×1.7 دلار، سالانه 31492 دلار بابت صرفه جويي در مصرف انرژي، عايد سازمان مربوطه مي‌گردد. دوره بازگشت سرمايه 180 روز(كمتر از يك سال) به دست آمد.

Recently, with reducing the energy resources and increasing the energy costs (price), the energy saving has been attracted any more. Pinch analysis of an industrial process has been employed to identify pinch point and energy price together with heat exchanger network cost. To do so, we simulate the refinery process using Hysis software and analyze the results with Aspen Energy Analyzer. After validating the model using field data, simulated model was studied. The results showed with 1.7E04 $ investment, 31492$ will be returned annually using modified retrofit network. The payback time would be 180 days. In this paper, the Pinch Point is investigated and analyzed at various temperatures using Aspen Hysis software and Aspen Energy Analyzer software. In addition, economic calculations related to operating costs (energy) and total costs have been done. With the modification of the above-mentioned heat exchanger network, notable saving will be earned for the mentioned organization. So, the return period of capital will be approximately 180 days (less than one year) for the mentioned organization in this model.