Course : UNDERSTANDING THE BASICS OF REFRIGERATION Lesson 6 : CLASSIFICATION OF REFRIGERANTS Presented By: Harshit Aggarwal

ABOUT ME . Graduated from NIT Nagpur in 2008 . Cleared Indian Engineering Services (IES-UPSC) Exam . Got the offer letter from most of the Maharatna and Navratna Companies . Cleared GATE Exanmm Course fee: CONTRIBUTE . Follow me on Unacademy at: https://unacademy.in/user/harshit_aggarwal

CLASSIFICATION OF A REFRIGERANT . Refrigerants are classified as: A. Saturated Hydrocarbon B. Unsaturated Hydrocarbon C. Inorganic Refrigerants

A. SATURATED HYDROCARBONS If the general formula of the refrigerantis CmHn FpClq then such a refrigerant is designated as R - (m-1) (n+1)p where n+p+q= 2m + 2

SATURATED HYDROCARBONS EXAMPLES EXAMPLE1: If the chemical formula of refrigerantis CCl2F2 R_ (1-1)(0+1): R012-r12 EXAMPLE 2 : Find the chemical formula of R-11 . 0+1+q 2+2 qF3 R- (m-)(nt)p p=1 n+p+q = 2m+2

SATURATED HYDROCARBONS EXAMPLES EXAMPLE 3: Find the chemical formula of R-113. R- (m-1)(n+Dp 0+3+q = 4+2 q=3 p=3 EXAMPLE 4: Find the chemical formula of R-134. R- (m-1)(n+)p m-1= 1 m=2 2+4+q = 2(2)+2 p=4 n+p+q = 2m+2

B. UNSATURATED HYDROCARBON If the refrigerant is unsaturated hydrocarbon the chemical formula of refrigerant is CmHnFpC1q then such a refrigerantis designated as CmHpC1q then such a refrigerantis designated as R- (m- n+p+q = 2m

UNSATURATED HYDROCARBON EXAMPLE Write the designation for Ethylene C2H4. m=2, n=4,p=0 n+p+q = 2m 4+0+q= 2(2) q-o R-1150

C. INORGANIC REFRIGERANTS R-700 + Molecular Weight NH3 14 + 1x3-17 R-700 +11 = R-717 H20 18 R-718 CO2 44 R-744 S 02 32+1 6x2 = 64 Air R-129 R-764 NOTE: Azeotropes: Mixture of refrigerant is known as azeotropes. Their designation starts with R-500 series.

7 lessons,

1h 5m

Enroll

427

✕Download

Harshit Aggarwal

Cleared UPSC ESE twice with Rank 63 and 90 in mechanical engg. Got 99 percentile in GATE. Cracked ONGC, BHEL,ISRO, SAIL, GAIL successfully

U

Unacademy user

Karan dubey

9 months ago

hindi me likhe to or behtar hoga

0

Reply

Kumar Madhukar

9 months ago

Will try...but it is difficult for me to type in Hindi..

AISHWARYA DUBEY

2 years ago

Sir have u covered the syllabus of RAC in gate in this course or there r some topics still remaining?

0

Reply

Harshit Aggarwal

2 years ago

Few more topics are there.

Vibhor Verma

2 years ago

few more topics like?

Rajan Kharwar

2 years ago

sir actually I seen your all videoes but if u speed us slow really it's amazing

Santhosh devasani

2 years ago

This course is very much useful for my preparation. Please make more videos on psychometry,air refrigeration and VARS.waiting for your course.......

0

Reply

Harshit Aggarwal

2 years ago

OK

Divya Prakash Pandey

2 years ago

very useful course , thank you
but Can you make vid on numerical problem?

0

Reply

Divya Prakash Pandey

2 years ago

very useful course , thank you
but Can you make vid on numerical problem?

0

Reply

Divya Prakash Pandey

2 years ago

very useful course , thank you
but Can you make vid on numerical problem?

0

Reply