سرمايش از انرژي خورشيد با استفاده از فرايند جذب سطحي

Cooling from Solar Energy by Process Adsorption

سرمايش‌ ساختمان‌ها و تبريد از جمله مواردي است كه براي تامين ‌آن‌ها انرژي الكتريكي زيادي به مصرف مي‌رسد. به‌دليل مسايل زيست‌محيطي و نيز افزايش هزينه‌هاي برق مصرفي، محققان به‌دنبال يافتن راه‌هايي براي جايگزين كردن انرژي الكتريكي با انرژي‌هاي تجديدپذيرند. خورشيد منبع تجديد‌پذيري است كه مي‌توان از انرژي پايان‌ناپذير آن براي اين منظور استفاده كرد. در اين مقاله سعي شده است سيكل تبريدي توضيح داده شود كه در آن از طريق فرايند جذب سطحي، انرژي مورد نياز سرمايش تامين مي‌شود. در اين مقاله اساس كار سيكل‌هاي مبتني بر فرايند جذب سطحي توضيح داده شده، عوامل تاثيرگذار بر ضريب عملكرد سيكل بررسي شده و راه‌حل‌هاي تجربي به‌دست آمده براي افزايش اين ضريب بيان شده است. سپس با استفاده از مطالعات و آزمايش‌هاي تجربي، COP يخچال‌هاي جذب سطحي خورشيدي از نظر زوج مبرد و نوع بستر با يكديگر مقايسه و بررسي شده‌اند. در پايان نيز به بررسي مزايا و معايب اين نوع سيستم‌ها پرداخته و راه‌هايي براي رفع معايب اين سيستم‌ها پيشنهاد شده است.

In our world today, cooling, refrigeration, and air conditioning processes are considered as essential needs and major requirements for all human beings. Although the traditional vapor compression machines are dominating electricity consumers. Their operations and propagation cause high electricity peak loads during the summer, especially in those countries with tropical climates. This kind of refrigerants have also high global warming effects as well as ozone layer depletion potentials. Providing cooling by utilizing a green energy source such as solar energy is the key solution to electricity and pollution problems. For this purpose, solar energy is a resource which is inexhaustible, renewable , clean ,cheap and available. The present study aims to explain the refrigeration cycle in which the adsorption process may provide the energy required for cooling. In this regard, firstly, the basis of the cycles related to the adsorption process was explained. Next, factors affecting the cycle coefficient of performance (COP) were studied and finally, the derived empirical solutions for raising coefficient were presented. Thus, considering experimental studyings, the COP of the solar adsorption refrigerator was compared and evaluated in respect of refrigerant pair and substrate. Eventually, the advantages and disadvantages of this type of system were investigated and some solutions were proposed to overcome the possible disadvantages.