Question

Which process does not use air expansion for refrigeration?

(a) Claude operated process

(b) Elliott process

(c) Turbo-reciprocating process

(d) Liquefaction process

I had been asked this question in class test.

My doubt is from Inorganic Chemical in section Inorganic Chemical Industries of Chemical Technology

Answer 1

Right choice is (b) Elliott process

To explain I would say: A novel process (elliott) does not use air expansion for refrigeration but sets up heat exchange with nitrogen coolant in strictly recuperative heat exchanger. Claude-operated process uses adiabatic expansion of 70-80% of the incoming air.