Test: Refrigerants - 2 - Mechanical Engineering MCQ

R1529, R134a, R600a demand higher starting torque motors than R12. If available R12 compressors of required larger displacements volumes are used with these substitutes, the starting torques of the motors could be inadequate, and starting problem might result. The motor mav trio constantly.

In refrigeration system, heat is absorbed at evaporator and rejected at condenser.

In the absorption system of Aqua-Ammonia type Ammonia is used as a refrigerant and water is used as a absorbent. The Aqua-Ammonia absorption system is most popular type absorption system.

The another type of absorption system (lithium bromide absorption system), in which lithium bromide is used as absorbent and water is used as refrigerant.

When the mixture of absorbent and refrigerant is heated sufficiently in the generator they get separate and refrigerant vapour is send to condenser and absorbent is sent back to the absorber.

R - 012
By comparing R-(m - 1)(n + 1) P
m - 1 = 0 ⇒ m = 1
n + 1 = 1 ⇒ n = 0
P = 2
where, n = number of hydrogen atom
m = number of carbon atom