The micro gas turbine test rig is based on a Turbec T100 PHS Series 3 operating in stand-alone configuration or connected to the electrical grid with a suitable safety interconnection panel. It consists of a complete module for power production (100 kW at nominal conditions), a heat exchanger located downstream of the recuperator outlet (hot side) for co-generative applications, and two battery packages for the start-up phase when the machine operates in stand-alone configuration. Even if the machine is located indoors, the outdoor roof was mounted over the power module to use its air pre-filters.
The power module includes a single shaft radial machine (compressor and turbine) operating at a nominal rotational speed of 70000 rpm (beta=4.45) and a TIT of 950°C, that is 1223.15 K, a natural gas fed combustor, a primary-surface recuperator directly attached to the turbine outlet, a water cooled high speed generator, a power electronic unit (rectifier, converter, filters and main circuit breaker), an automatic control system interfaced with the machine control panel, and the auxiliaries. The machine control system operates at constant rotational speed in stand-alone mode, whereas, in the grid-connected mode, it performs a constant TOT control strategy.
The heat exchanger for water heating, available for co-generative applications, includes an exhaust gas by-pass for water temperature control. Each start-up battery package includes thirty 12 Volt batteries connected in series for a nominal voltage of 360 Volt DC.
