Thermodynamics Cooling Process
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Transcript of Thermodynamics Cooling Process
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Design & Supply By : Sajjad Hooshmandi
Master : Dr. Arman Maroufi
Thermodynamics Cooling Process
In The Name Of Allah
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2Refrigerators & Heat Pumps
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3What is COP ?
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41.The Reversed Carnot Cycle
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52.The Ideal Vapor - Compression Refrigeration Cycle
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7Example (Ideal Vapor – Compression)
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8Solution
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In Table A-12
(For h1)
In Table A-13
(For h2)
276 .46−267 .34267 .46−𝒉𝟐
=0 .9481−0 .91850 .9481−0 .9446
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In Table A-12(For h3 , h4)
)
)
)Formula
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123.Innovative Vapor - Compression Refrigeration Cycle ( Cascade Refrigeration )
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13Example ( Cascade Refrigeration )
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14Solution
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164.Multistage Compression Refrigeration System
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17Example (Multistage Compression )
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18Solution
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205.Absorption Refrigeration System
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23Example (Absorption)
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مبردها
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مقدمه26
دماي حرارت هميش7ه از جس7م ب7ا اول و دوم ترمودينامي"کطب7ق قواني7نانتقال مي ياب7د و تنه7ا ب7ا ص7رف کار (انرژ7ي) م7ي دماي پايين ت"ر ب7ه جس7م ب7ا باالت"ر
توان عکس اين فرآيند را اعمال نمود.
ج7ا مي شود ه ب7 در ي7ک س7يکل ترموديناميک7ي ب7ه ماده اي ک7ه حرارت توس7ط آ7ن ج7اس"رمايشي بخار – اطالق شده و س77يال عام77ل در س77يکل س"يال عام"ل
ناميده مي شود. مبرد، تراکم
ب7ا توج7ه ب7ه محدوده وس7يع اس7تفاده از س7يستم هاي س7رمايشي و مضرات7ي ک7همبرده7ا براي محي7ط زيس7ت از جمل7ه الي7ه ازن ايجاد کرده ان7د، بح7ث جايگزين7ي
است.مبردهاي نوين به جاي مواد مضر، مدتي است که آغاز شده
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آشنايي با ساختار مبردها 27
I يد ، Br برم ، Cl کلر، F فلورعناصر • هالوژن هاH هيدروژن و C کربنشامل ترکيب • HCهيدروکربن هاي ساده CFCگروه کلر و فلورسيال عامل شامل •فلورسيال تنها شامل • FCگروه
در • ک""ه اس""ت س""ياالتي جايگزيني هيدروکرب""نشام""ل ، ب"ا هالوژن ه"ا ب"ه ص"ورت کام"ل نبوده و ماده شامل هيدروژ"ن
HCFCگروه کلر و فلور، هيدروژن، کربن عناصر
HCFCبا خروج کلر از ترکيب • HFCگروه
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معضلی به نام گرم شدن زمین28
پروتکل HCFCمونترال سال
1978CFC
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انواع مبّرد ها29
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انواع مبّرد ها30غيرهالوژني هالوژني
آلي غير هيدروکربنها HC
کلر بدون کلردارناقص هالوژني
HFCکامل هالوژني
FCناقص هالوژني
HCFCکامل هالوژني
CFC
خالص ماده خالص ماده خالص ماده خالص ماده خالص ماده خالص ماده
R717 R170R23 R125
R14 R116
Rr R123
R11 R113
R718 R290R32 R134a
R218 R124R12 R114
R744 R600 R143a RC318 R142bR13 R115
DIOXID R600a R152a R13B1 R1150 R227
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شرایط جایگزینی مبرد جدید31
سيال عامل تبريد گزينش ترکيبات جديد به عنوان . تعبيت از پروتکل مونترال 1. متناسب با سیستم انتخاب شده2و 3 اقتصادي نظ"ر از ص"رفه ب"ه مقرون و دس"ترس در .
تجاري. غير قابل اشتعال و غير سمي4. توانایی جايگزين شدن در سيستم هاي فعلي5
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The End