Very low-pressure-ratio gas turbines can obtain very high theoretical efficiencies if they are operated in a regenerative cycle with very effective (0.95) heat exchangers. A 50,000-hp engine operates at a pressure ratio of 3:1 and has a turbine inlet temperature of 1,5000E Design a 95 percent effective regenerator for this application where the hot-side surface is made from surface 17.8-iw and the cold-side surface is made from surface 9.03. The pressure drop for either side should not exceed 0.5 psi.
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