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2. A CLOSED-CYCLE GAS-TURBINE ENGINE WITH
3. REGENERATION OF HEAT
The schematic diagram of a closed-cycle gas-turbine engine (GTE) with a
regeneration of heat is shown in Fig. 2.1. A feature of this setup is that it’s not a
periodic change of the working fluid. The products of the fuel combustion is used to
heat the working fluid is continuously circulated in the GTE. Such installation is the
external combustion engines.
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1 2 3

8 6
4

7 5
M

1 - the fan; 2 - air heater; 3 - combustion chamber;4 - heater working fluid; 5 - turbine;
6 - regenerator;7 - cooler; 8 - compressor; 9 - exhauster.

Figure 2.1 - Schematic diagram of the a closed-cycle gas-turbine engine
with a heat regeneration.
The fan 1 delivers the air into the combustion chamber 3 with fuel, where it
undergoes combustion. The products of combustion with high temperature enter the
heater working fluid 4, from which it is sent to the heater 2 to raise the temperature of
the atmospheric air before entering the combustion chamber. Out of the heater products
of combustion are exhausted by the exhaust fan 9.
The working fluid is compressed in the compressor 8 and supply to a regenerator 6
at the first, and then it supply in the heater 4. Late it flows into the turbine 5, where
produce some work. After the turbine working fluid is cooled successively in the
regenerator 6 and the cooler 7.
The closed-cycle gas-turbine engines are greater complexity compared to the
open-cycle GTE but closed-cycle GTE have several advantages.
First, the products of combustion flow through the turbine, and their actions
influence only on the heat exchanger 4 (see Fig. 2.1). It follows that the range of
application of fuel for such plants more wide. They can burn solid fuel, as solid
particles, which are contained in the products of combustion of these fuels cause erosion

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