بررسی عملکرد یک سیستم سرمایشی مرکب دسیکنت و دیوار ترومب و بهینه سازی مساحت دیوار در شرایط پایا

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکترای مهندسی انرژی، دانشکده محیط زیست و انرژی، دانشگاه آزاد اسلامی واحد علوم و تحقیقات تهران، ایران

2 دانشیار و عضو هیئت علمی گروه مکانیک- دانشکده فنی- دانشگاه گیلان

3 دانشیار، دانشکده محیط زیست و انرژی، دانشگاه آزاد اسلامی واحد علوم و تحقیقات تهران، ایران

4 دانشیار، دانشکده مهندسی انرژی، دانشگاه آزاد اسلامی واحد علوم و تحقیقات تهران، ایران

چکیده

استفاده از سیستم دیوار ترومب برای تهیه گرمای مورد نیاز احیاء چرخ دسیکنت و بررسی اندازه مساحت دیوار و رسیدن به یک شرایط آسایش تهویه مطبوع، ایده اصلی این مقاله است. در این مقاله به مدل‌سازی چرخ دسیکنت خورشیدی که گرمای مورد نیاز جهت احیاء چرخ را از یک دیوار ترومب می گیرد پرداخته شده است. در این سیستم ابتدا بخش های مختلف چرخ دسیکنت، دیوار ترومب و میزان تابش انرژی خورشیدی جداگانه با برنامه نویسی متلب مدلسازی شده و سپس اجزاء به هم متصل و مدل به صورت یکپارچه برای تمام شرایط آب و هوایی مرطوب قابل بررسی است. نتایج مدل با نتایج آزمایشگاهی مقایسه گردیده و انطباق قابل قبولی با یکدیگر دارند. به منظور سرمایش ساختمان در ماه جولای، شهر رشت بعنوان منطقه هدف انتخاب گردیده و جهت پیش سرمایش هوای فرایندی قبل از ورود به کولر تبخیری از کویل سرمایش زمینی استفاده گردیده است . اندازه مساحت دیوار ترومب به صورت تابعی از پارامتر های چرخ دسیکنت استخراج و با خروجی دمای 66 درجه سانتیگراد از دیوارخورشیدی ترومب، دمای شرایط آسایش محل تهویه 24 درجه سانتیگراد و نسبت رطوبت 12 گرم بر کیلوگرم هوای خشک و مساحت دیوار بر اساس شرایط بهینه کارکرد چرخ دسیکنت در حدود 52 مترمربع تعیین گردیده است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigating the Performance of a Hybrid Desiccant Cooling System and Trombe Wall and Optimizing Wall Area in a Stable Condition

نویسندگان [English]

  • Moharram Bahramkhoo 1
  • Kourosh Javaherdeh 2
  • Farideh Atabi 3
  • Abulghasem Emamzadeh 4
1 Department of Energy Engineering, Graduate School of Environment and Energy, Science and Research Branch, Islamic Azad University, Tehran, Iran
2 Instructor of Department of Mechanical Engineering, Faculty of Engineering, University of Guilan
3 Department of Environmental and Energy Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
4 Associate Prof., Department of Energy Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
چکیده [English]

This study focuses mainly on employing Trombe wall systems to provide the heat required for restoring the desiccant wheel and investigating the optimal surface area of the wall for attaining air conditioning comfort. In this study, a solar desiccant wheel which receives the thermal energy required for regeneration from a Trombe wall was modeled. In this system, first, the components of the desiccant wheel, the Trombe wall, and the insolation were separately modeled in MATLAB and then assembled. The integrated system may be examined in all humid weather conditions around the globe. The results of the model are compared with the experimental results and have an acceptable agreement with each other. The model had been developed for cooling the building in July in Rasht city by using the ground heat exchanger. A ground coil was incorporated in this system to pre-cool the process air. The optimal surface area of the Trombe wall was extracted as a function of the parameters of the desiccant wheel. For a wall output temperature of 66 °C, the comfort temperature was found to be 24 °C, the humidity ratio to be 12 g /kg , and the optimal wall surface area to be around 52 m2.

کلیدواژه‌ها [English]

  • Trombe wall
  • Desiccant Wheel
  • Humid Climate
  • optimization
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