بررسی عملکرد سیستم تبرید جذبی تک اثره لیتیوم برماید–آب متصل به گرد‌آورنده فتوولتائیک حرارتی

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه مهندسی مکانیک، دانشگاه سیستان و بلوچستان، زاهدان، ایران

چکیده

در پژوهش حاضر به بررسی عملکرد سیستم تبرید جذبی تک اثره لیتیوم برماید-آب متصل به گردآورنده‌های فتوولتائیک حرارتی پرداخته شده است. اجزاء اصلی سیستم شامل ژنراتور گرما، اواپراتور، کندانسور، جذب کننده، مبدل حرارتی، پمپ، شیرهای انبساط و گردآورنده‌های PV/T می‌باشد. معادلات حاکم بر مسئله توسط نوشتن بقای جرم، غلظت و قانون اول ترمودینامیک برای اجزاء سیستم به دست آمده است و به صورت عددی حل شده است. اعتبارسنجی نتایج شبیه سازی با داده‌های تجربی پژوهش‌های گذشته انجام شده است. نتایج نشان می‌دهد که یک تعداد مطلوبی برای گردآورنده‌های PV/T وجود دارد که مقدار آن 50عدد با مساحت سطح کل 5/38مترمربع می‌باشد و می‌تواند یک بار سرمایشی در حدود 5کیلووات را تأمین نماید. در انتها تأثیر پارامترهای مختلف عملکردی بر ضریب عملکرد روزانه سیکل تبرید خورشیدی بررسی شده است. افزایش دمای ژنراتور گرما، دمای کندانسور و دمای جذب کننده باعث کاهش ضریب عملکرد روزانه سیستم تبرید خورشیدی می‌شود. در حالی که افزایش دمای اواپراتور افزایش ضریب عملکرد روزانه سیستم تبرید خورشیدی را به دنبال دارد. استفاده از گردآورندههای PV/Tعلاوه بر تأمین حرارت ورودی مورد نیاز در ژنراتور گرما می‌تواند توان مصرفی پمپاژ در سیکل ترکیبی و توان الکتریکی اضافه جهت سایر مصارف در اختیار گذارد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Performance Investigation of a Single Effect (LiBr-H2O) Absorption Cooling System connected to Photovoltaic Thermal Collectors

نویسندگان [English]

  • O. Shahryari Zanganeh
  • F. Sarhaddi
Department of Mechanical Engineering, University of Sistan and Baluchestan, Zahedan, Iran
چکیده [English]

In present research, the performance evaluation of a single effect (LiBr-H2O) absorption cooling system connected to photovoltaic thermal collectors is carried out. The main components of the system include generator, evaporator, condenser, absorber, heat exchanger, pump, expansion valves and photovoltaic thermal collectors. The governing equations of the problem are obtained by writing the mass balance, concentration balance and the first law of thermodynamics for the components of the system and it is solved numerically. The validation of simulation results has been carried out with the experimental data of the previous studies. The results show that there is a desired number for photovoltaic thermal collectors which is 50 number with total area 38.5 m2. It can supply a 5 kW cooling load. Finally, the effect of various operating parameters on the daily coefficient of performance of the system has been investigated. The increase of temperature of generator, condenser and absorber increases the daily coefficient of performance of the system, while the increase of evaporator temperature decreases the daily coefficient of performance of the system. The usage of PV/T collectors besides the supply of inlet heat of generator can provide the consumed pumping power through the system and additional electrical power for other applications.

کلیدواژه‌ها [English]

  • Solar absorption cooling system
  • Single effect (LiBr-H2O) cycle
  • energy analysis
  • Photovoltaic thermal collector
  • Coefficient of performance
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