A novel absorption refrigeration cycle using centrifugal separation is described. The generator and condenser of a conventional absorption cycle are replaced with a single centrifuge and the absorbent-refrigerant solution is separated by centrifugal force. The reversible mechanical work required for separating a solution has been calculated and the coefficient of performance (COP) of the cycle determined. For an annulus centrifugal field, the separation process of the solution has been simulated. The equilibrium rotation speed and separation time required have been determined and the cooling capacity of the cycle calculated. The effects of the mass diffusion coefficient and sedimentation coefficient upon them have also been analysed, (C) 2001 Elsevier Science Ltd. All rights reserved.