تحلیل انرژی-ترمودینامیکی دو سیستم تبرید تراکمی با هدف تامین دو محدوده دمایی بالای صفر و پایین صفر درجه با مبردهای دوستدار محیط‌زیست در اقلیم‌های مختلف

ﻣﻄﺎﻟﻌﻪ ﺣﺎﺿﺮ ﺑﻪ ﺑﺮرﺳﯽ و ﺗﺤﻠﯿﻞ ﺗﺮﻣﻮدﯾﻨﺎﻣﯿﮑﯽ دو ﺳﯿﺴﺘﻢ ﺗﺒﺮﯾﺪ ﺗﺮاﮐﻤﯽ دو ﻣﻨﻈﻮره ﺷﺎﻣﻞ ﺳﯿﺴﺘﻢ ﺑﺎ ﻣﺤﻔﻈﻪ اﺧﺘﻼط و ﺗﺎﻧﮏ ذﺧﯿﺮه و ﺳﯿﺴﺘﻢ ﺗﺒﺮﯾﺪ آﺑﺸﺎری ﺑﺎ ﮐﺎرﺑﺮی در ﺳﺮدﺧﺎﻧﻪﻫﺎ ﺑﺎ ﻫﺪف ﺗﺎﻣﯿﻦ دو ﻣﺤﺪوده دﻣﺎﯾﯽ ﺑﺎﻻی ﺻﻔﺮ و زﯾﺮ ﺻﻔﺮ ﻣﯽ ﭘﺮدازد. ﻫﺪف از اﯾﻦ ﭘﮋوﻫﺶ ﺑﺮرﺳﯽ ﻣﯿﺰان اﻧﺮژی ﻣﺼﺮﻓﯽ ﺳﺎﻻﻧﻪ ﺳﯿﺴﺘﻢﻫﺎی دو ﻣﻨﻈﻮره ﺑﺮودﺗﯽ ﺑﺎ ﻣﺒﺮدﻫﺎی دوﺳﺘﺪار ﻣﺤﯿﻂزﯾﺴﺖ و ﻫﻢﭼﻨﯿﻦ ﺑﺮرﺳﯽ ﭘﺎراﻣﺘﺮﻫﺎی ﻣﻮﺛﺮ ﺑﺮ راﻧﺪﻣﺎن اﯾﻦ ﺳﯿﺴﺘﻢﻫﺎ ﻣﯽﺑﺎﺷﺪ. ﺑﺮرﺳﯽﻫﺎ ﻧﺸﺎن داد ﮐﻪ ﺑﻬﺘﺮﯾﻦ ﻣﺒﺮد از ﻟﺤﺎظ ﻋﻤﻠﮑﺮدی در ﻫﺮ دو ﺳﯿﺴﺘﻢ، ﻣﺒﺮد r290ﻣﯽﺑﺎﺷﺪ. ﺳﯿﺴﺘﻢ دارای ﺗﺎﻧﮏ ذﺧﯿﺮه، راﻧﺪﻣﺎن ﺑﺎﻻﺗﺮی داﺷﺘﻪ و ﻫﻢﭼﻨﯿﻦ ﻣﯿﺰان ﻣﺼﺮف اﻧﺮژی آن در ﻣﻨﺎﻃﻖ ﮔﺮم و ﻣﺮﻃﻮب 30درﺻﺪ و در دﯾﮕﺮ ﻣﻨﺎﻃﻖ 20درﺻﺪ ﭘﺎﯾﯿﻦﺗﺮ از ﺳﯿﺴﺘﻢ آﺑﺸﺎری ﻣﯽ ﺑﺎﺷﺪ. اﻟﺒﺘﻪ اﯾﻦ ﺳﯿﺴﺘﻢ ﺑﻪ ﻧﺴﺒﺖ ﺳﯿﺴﺘﻢ آﺑﺸﺎری ﻣﺤﺪودﯾﺖﻫﺎی ﺑﯿﺸﺘﺮی داﺷﺘﻪ و ﺑﺴﯿﺎری از ﻣﺒﺮدﻫﺎ در آن ﺑﻪ ﻋﻠﺖ اﯾﻦ ﮐﻪ ﻓﺸﺎر ﮐﺎری ﺑﺎ ﮐﺎﻫﺶ دﻣﺎ ﺑﻪ زﯾﺮ اﺗﻤﺴﻔﺮ ﻣﯿﺮﺳﺪ، ﻗﺎﺑﻞ اﺳﺘﻔﺎده ﻧﯿﺴﺘﻨﺪ. ﻣﻘﺎﯾﺴﻪ اﯾﻦ دو ﺳﯿﺴﺘﻢ ﻧﺸﺎن ﻣﯽدﻫﺪ ﮐﻪ ﺑﺎ ﻓﺮض ﺛﺎﺑﺖ ﺑﻮدن ﻇﺮﻓﯿﺖ ﺑﺎر ﮐﻞ ﺳﺮدﺧﺎﻧﻪ، ﺑﺎ اﻓﺰاﯾﺶ ﺑﺎر ﺣﺮارﺗﯽ ﺳﺎﻟﻦﻫﺎی زﯾﺮ ﺻﻔﺮ، ﻣﺼﺮف اﻧﺮژی ﻫﺮ دو ﺳﯿﺴﺘﻢ اﻓﺰاﯾﺶ ﭘﯿﺪا ﻣﯽﮐﻨﺪ. ﻫﻤﭽﻨﯿﻦ ﻣﺸﺨﺺ ﮔﺮدﯾﺪ ﮐﻪ ﺳﯿﺴﺘﻢ آﺑﺸﺎری در اﻗﻠﯿﻢ ﮔﺮم و ﻣﺮﻃﻮب 10درﺻﺪ ﻣﺼﺮف اﻧﺮژی ﺑﯿﺸﺘﺮی را ﺑﻪ ﻧﺴﺒﺖ ﺑﻪ دو اﻗﻠﯿﻢ دﯾﮕﺮ اﻧﺮژی دارد.

thermodynamic analysis of two dual-purpose compression refrigeration systems with environmentally friendly refrigerants in different climates

the aim of this research is to investigate the thermodynamics of two dual purpose condensation refrigeration systems. one system has a flash chamber and the other is a cascade refrigeration system. both systems are used in cold storages to provide two temperature ranges, one above zero and the other below zero. this study focuses on the annual energy consumption of these dual purpose refrigeration systems that use environmentally friendly refrigerants. it also aims to investigate the parameters that affect their efficiency. the results of the research indicate that the best refrigerant, in terms of performance, for both refrigeration systems is r290. the system with a flash chamber has a higher efficiency than the cascade system. its energy consumption is 30% lower in hot and humid areas and almost 20% lower in other climates than the cascade system. however, the flash chamber system has more limitations than the cascade system, and many refrigerants cannot be used in it due to pressure limitations. the comparison of these two systems shows that assuming the total load capacity of the cold storage is constant, the energy consumption of both systems increases with the increase in the thermal load of the sub zero evaporator.