مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

تحلیل ترمواکونومیکی سیکل تبرید جذبی با مخلوط آب و مایع یونی

نویسندگان
1 دانشگاه تبریز، تبریز
2 استاد دانشکده مهندسی مکانیک، دانشگاه محقق اردبیلی و دانشگاه تبریز
چکیده
در این تحقیق، عملکرد ترمواکونومیکی یک چرخه تبرید جذبی با استفاده از محلول آب - مایع یونی (1- اتیل، 3- متیل ایمیدازولیوم تری فلرو استیت) بررسی و با چرخه آب – لیتیوم برماید مقایسه شده است. برای این منظور، تحلیل ترمودینامیکی و ترمواکونومیکی جهت شبیه‌سازی سیستم بکار گرفته شده و تاثیر متغیرهای طراحی بر روی پارامترهای عملکردی مانند ضریب عملکرد، بازده اگزرژی، نسبت جریان جرمی محلول، سطح تبادل حرارت مبدل‌‌ها و هزینه جریان‌ها مطالعه شده است. خواص ترمودینامیکی هر دو مخلوط آب – مایع یونی و آب – لیتیوم برماید با استفاده از مدل غیر تصادفی دو مایع پیش بینی شده است. نتایج نشان داده است که سیستم دارای مایع یونی ضریب عملکرد و بازده اگزرژی پایینتری (0.66 و 10.15%) نسبت به سیستم آب - لیتیوم بروماید (0.78 و 12%) دارد. همچنین کمترین سطح کلی مبدل‌های حرارتی و هزینه سالانه سیستم جذبی آب - مایع یونی (49 m2 و 4907 $/y) بیشتر از سیستم آب - لیتیوم بروماید (16 m2 و 3347 $/y) می باشد. با وجود عملکرد ضعیف‌تر سیستم‌های دارای مایع یونی، مزایای استفاده از آنها مانند عدم کریستالیزاسیون، فشار بخار پایین و تمایل به خوردگی ناچیز، این مایع‌ها را به گزینه مناسبی جهت جایگزینی در چرخه تبرید جذبی تبدیل کرده است.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Thermoeconomic analysis of water – ionic liquid absorption refrigeration cycle

نویسندگان English

Foad Noori 1
Moharam Jafari 1
Mortaza Yari 2
1 Department of Mechanical Engineering, Tabriz University, Tabriz, Iran.
2 Department of Mechanical Engineering, Tabriz University, Tabriz, Iran.
چکیده English

In this study, the thermoeconomic performance of absorption refrigeration cycle utilizing binary solution containing water - ionic liquid (1-Ethyl-3-Methylimidazolium Trifluoroacetate) is investigated and compared with the water-lithium bromide cycle. For this purpose, the thermodynamic and thermoeconomic analysis have been employed to simulation of the cycle and then, the effects of design parameters on the performance parameters like coefficient of performance, exergetic efficiency, solution circulation flow ratio, area of heat exchangers and cost of the streams are studied. The thermodynamic properties of the binary solution are predicted using Non-Random Two Liquids model. It has been found the system with ionic liquid has a lower coefficient of performance and exergetic efficiency (0.66, 10.15%) than aqueous solution of lithium bromide system (0.78, 12 %). The total area and total cost of the ionic liquid system (49 m2, 4907 $/year) is larger than water-lithium bromide cycle (16 m2, 3347 $/year). Despite the Lower performance of systems with ionic liquid, the advantages of these liquids like no crystallization, negligible vapor pressure and weak corrosion tendency to iron-steel materials make the new working pair suited for the absorption refrigeration cycle.

کلیدواژه‌ها English

Ionic liquid
Absorption refrigeration cycle
Thermoeconomic
Exergy
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