Many university and college laboratories operate gas turbines which were installed about 15 years ago, and some thought must be given to eventual replacement. This paper reviews the requirements of gas turbines suitable for this market and compares the relative merits of single-shaft and free turbine units. It is suggested that a single-shaft unit with a load compressor has considerable merit with regard to operating flexibility, versatility, and performance, and design aspects of a suitable unit are discussed.

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