The situation of practice and theoritical study at home and abroad for inlet air cooling system with residucal heat refrigeration in gassteam combined cycle(GSCC) have been reviewed

pointing out the necessity and importance of developing this kind of study on varying operation condition characteristic of power system. Based on application of analytic theory for varying operation condition characteristic of power machine

the study ways and technical thinking for analytic method of varying operation condition charachteristic for inlet air cooling system with residual heat refrigeration in GSCC have been put forward. combined with existing parts of GSCC

supplementing analytic solution of varying operation condition characteristic of abosorption type refrigeration machine and heat exchanger etc.

the typical analytic characteristic of inlet air cooling with residual heat refrigeration can be studied. Results of study show that the study ways suggested in this paper to be feasible.