1097355 DE84017637/XAB improved robotic equipment for radiological emergencies: Chester, C.V. Oak Ridge National Lab., TN. Sponsor: Department of Energy, Washington, DC. Report no.: ORNL-6081. Sep 84. 57pp. Portions are illegible in microfiche products. Original copy available until stock is exhausted.

Abstract

In this paper, a simulation based performance of a recuperated combined gas turbine (GT) and steam turbine (ST) cycle is presented. The proposed combined cycle (CC) utilizes GT exhaust heat for air and fuel preheating sequentially one after the other. Comparison of performance of the recuperated CC is made with a non-recuperated CC and a CC with only the air recuperator (AR). At a compressor pressure ratio (CPR) of 12, the CC with both AR and fuel recuperator (FR) shows 16.8% and 54.44% gain in performance over the cycle with only the AR and no recuperators. A parametric study based on variation of CPR and steam injection rate (STIR) indicate improvement in efficiency and power with increase in CPR and STIR both. With CPR, the net GT power increases, however the net ST power shows a decreasing trend particularly for the cycle without recuperators. With STIR, the net GT power increases and the bottoming ST power although decreases but with less significance. The net ST power of the CC plant without recuperators is significantly less for the bottoming ST cycle to be economically feasible. The CC plant shows an average 53.32% gain in efficiency and power over the plant without the bottoming ST cycle.