تبريد refrigeration PDF

## التبريد refrigeration ### Unit(2) 1. Do refrigeration and air conditioning systems have the same mechanism? - هل التبريد والتكيف لهما نفس الية التشغيل - Both refrigeration and air conditioning systems are based on the same mechanism, the cooling of a substance. - نظام التبريد وال...

## التبريد refrigeration ### Unit(2) 1. Do refrigeration and air conditioning systems have the same mechanism? - هل التبريد والتكيف لهما نفس الية التشغيل - Both refrigeration and air conditioning systems are based on the same mechanism, the cooling of a substance. - نظام التبريد والتكييف لهما نفس الميكانيزم في تبريد المادة والمكان 2. What are the main components of both refrigeration and air conditioning systems? - ماهي العناصر الموجودة فى نظام التبريد والتكيف - - Compressor - Evaporator - Fan - Condenser - Expansion valve. - الضاغط، مبخر، مروحة، مكثف وصمام التمدد 3. Are there differences between air conditioning and refrigeration? - هل يوجد اختلاف بين التبريد والتكييف، - There are substantial differences between the two systems, the design, method and the structure they are used in. - يوجد اختلاف بين النظامين فى طريقة التصميم والبنية المستخدمة فيها. 4. Explain Refrigeration. - عرف التبريد - define refrigeration? - It is the process by which the temperature of fluids or bodies in general is decreased, - السوائل هو العملية التي بواسطتها تبرد درجة حرارة الأجسام مصمم كا من - Is the process by witch the temperature of fluids or bodies in general - 5. What does the term Refrigeration include in the food industry? - ماهي درجة حرارة التبريد المتحدثة في صناعة الأغذية - The term Refrigeration is applied to include all processes that reach temperatures 60C - التبريد عند درجة حرارة ٦٠ 6. What is the function of the inside fans? - ماهي وظيفة المراوح الداخلية - Fans is used for ventilation both inside and out side the environment. - Fans are used for ventilation both inside and out side the - تص تصوير ١٩ - - البيئة enviroment in side the fans drawin air from the evaporator. - The inside fans draw air from the evaporator. - - تستخدم المراوح في تهوية البيئة الداخلية والخارجية ، والمروحة الداخلية تستخدم في - نقل الهواء من البيئة إلى حمام العدد البحر - ### Key terms in the chapter | Term | Meaning | |---|---| | refrigeration | كلمة | | conditioning | تكييف | | System | نظام | | same mechanism | نفس الأداء | | gernal | طبيعي | | Compressor | الضاغط | | condenser | المكثف | | expansion valve | صمام التمدد | | evaporator | المبخر | | fan | مروحة | | inside fans | المراوح الداخلية | | enviroment | البيئة | | all processes | كل العمليات | | systems | نظام | | bodies | أجسام | | differences | مختلف | | between | بين | | components | عناصر | | air | هواء | ### Answers to the chapter's questions 1. Answer the following questions: - Do refrigeration and air conditioning systems have the same mechanism? What is it? - Yes they have the same mechanism. The cooling of a substance and space. - What are the main components of both refrigeration and air conditioning systems? - The main components of both refrigeration and air conditioning systems are compressor, evaporator, fan, condenser and expansion valve. - Are there any differences between refrigeration and air conditioning? - Yes they are the differences between refrigeration and air conditioning systems are the design methods and the structures they are used in. - Define refrigeration? - Refrigeration is the process by which the temperature of fluids or bodies in general is decreased. - What does the term refrigeration include in the food industry? - In the food industry the term refrigeration include all processes that reach temperatures down to 60C. Such as freezing, deep freezing, and freeze drying. - What does the operating principle of the refrigeration process depend on? - The operating principle of the refrigeration process depends on the action of the refrigerant inside the cycle which absorbs heat from the environment in the evaporation phase, and dissipates it in the condensation phase. - What is the function of the refrigerant inside the cycle? - The function of the refrigerant inside the cycle which absorbs heat from the environment in the evaporation phase, and dissipates it in the condensation phase. - How does the refrigerant change from the liquid to the gaseous state? - The refrigerant changes from the liquid to the gaseous state by absorbing a certain amount of heat from the surrounding environment, thus cooling the environment. - When does the refrigerant return to the liquid state? - The refrigerant return to the liquid state when the refrigerant in the gaseous state gives up the absorbed heat. - How does the refrigerant evaporate? Where? - The refrigerant evaporates by removing heat from the air that flows through the evaporator. In the evaporator or through the evaporator. - How do the fans cool the refrigerant? - The fans cool the refrigerant by blowing air through the condenser. - What is the function of the inside fans? - The function of the inside fans the fans draw in air from the environment and force it through the evaporator, where air is cooled before returning to the environment. 2. Do as shown in brackets: - Refrigeration and air conditioning systems have the same mechanism. (Put true or false) - (True) - In the food industry, the term refrigeration includes processes such as..............and (Complete) - In the food industry, the term refrigeration includes processes such as freezing, deep freezing and freeze drying - The refrigerant changes from the gaseous to the liquid state by absorbing heat. (Correct) - The refrigerant changes from the liquid to the gaseous state by absorbing a certain amount of heat. - is the process - the temperature of fluids or bodies - by which - is decreased- Refrigeration. (Rearrange) - Refrigeration is the process by which the temperature of fluids or bodies is decreased. - The refrigerant absorbs heat in the ........ Phase, and dissipates it in the ......phase (fill in the gaps) - The refrigerant absorbs heat in the evaporation Phase, and dissipates it in the condensation phase. - Warm - inside - absorb - low. (Give the opposites) - Cool - outside – dissipate - high. 3) Complete the following sentences: - The compressor delivers the hot Freon gas to........ - The compressor delivers the hot Freon gas to the condenser. - The condenser absorbs the heat from the gas causing it....... - The condenser absorbs the heat from the gas causing it to condense. - The expansion valve lowers ... from the condenser. - The expansion valve lowers the pressure of the gas arriving from the condenser. - The liquid refrigerant evaporates by removing - The liquid refrigerant evaporates by removing heat. - Fans are used for ventilation both - Fans are used for ventilation both inside and outside the environment. 4)-Write a paragraph on: - Refrigeration and its components - Both refrigeration and air conditioning systems are based on the same mechanism: the cooling of a substance and space. The main components of both refrigeration and air conditioning systems are compressor, evaporator, fan, condenser and expansion valve. The differences between refrigeration and air conditioning systems are the design methods and the structures they are used in. 5) Give the opposites( الكلمات الهامة وعكسها في هذه الوحدة - Same = differences – absorbs = dissipates – evaporation = condensation - Gas = liquid - low = high – inside = outside. - (Good luck)