In absorption refrigerators the energy driving the process is supplied not as work, but as heat from a gas flame at a temperature τ_hh > τ_h. Mobile home and cabin refrigerators may be of this type, with propane fuel.

(a) Give an energy-entropy flow diagram similar to figures for such a refrigerator, involving no work at all, but with energy and entropy flows at the three temperatures τ_hh > τ_h > τ_l.

(b) Calculate the ratio Q_l/Q_hh, for the heat extracted at τ = τ_l, where Q_hh is the heat input at τ = τ_hh. Assume reversible operation. 

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Output Ieput Entropy Heat Estrepy New entopy Outpul work: IV Input New work: entropy Entropy Hea Entropy Heat Clatput (a) Input (b)