Patent GB-514733-A (GB)
Title: Improvements relating to working processes for gas turbines and to gas turbines for carrying the same into effect
IPC: F02C1/06
Filed: 1938-05-12
Abstract: 514,733. Elastic - fluid turbines. TALALMANYKIFEJLESZTO ES ERTEKESITO, K. F. T. May 12, 1938, No. 14225. Convention date, May 18, 1937. [Classes 110 (i) and 110 (iii)] A gas turbine drives a compressor which delivers gas into a heat exchanger, heated by the exhaust gases from the turbine, combustion of part or all of the compressed gas taking place after leaving the turbine. In Fig. 1 a turbine 4 drives a compressor 1 which compresses air entering a port 7, delivers the air to a heat-exchanger 10, and the heated air passes up a pipe 9. Part of the gases from the turbine pass down a pipe 15 into the furnace 20, which in this case contains solid fuel, and burnt gases enter a chamber 19, and join part of the gases from the turbine, which flow through a bye-pass 13. Valves 12, 14, 16, control the gas streams. After passing through the exchanger 10, 'the burnt gases are led to atmosphere through an outlet 23 which contains a fan 25, driven by a motor 24, or from the turbine shaft. In a modification, Figs. 2a, 2b, combustion chambers 48, 49, are also provided in the turbine 52. Part of the exhaust gases from the latter pass down a pipe 57 into a furnace 60, and part are bye-passed through a pipe 77. Part of the air entering the furnace flows upwards into a chamber 63 where combustion is completed by the addition of air passing up a pipe 64. These gases pass through the exchanger 55 and are exhausted through an outlet 66. Part of the air entering the furnace flows downwards to form a gaseous fuel which is drawn off by way of a pipe 67, passes through a filter 102, Fig. 2b, into pipes 103, 104, leading to heat exchangers 68, 105. A pipe 106 leads air from. the compressor delivery 54 into the exchanger 105, and the heated air leaves through a pipe 108 leading to the turbine inlet 56, Fig 2a. Part, or all, of the gas from the furnace flowing through the exchanger 105, is led into the exchanger 68 to a cooler 111, along a pipe,114 into a compressor 70 driven by an electric motor 71, or by other means. After leaving the compressor 70, the gas is heated in 68, and passed through pipes 72, 73, 73<1>, into combustion chambers 48, 49, in the turbine. Combustion may continue throughout the flow of gases through the turbine. Part of the gases in the pipe 74 pass through a jacket 75 around the furnace, and rejoin the stream in the space 65. Water pasing through a coil 117 is evaporated and led into the furnace by way of a pipe 118. The branch 120 may be used instead of 106. If liquid fuel is condensed in the heat exchangers 105, 68, this is removed through pipes 121, 122, by a pump 123, and utilised in the combustion chambers 48, 49. In the plant shown in Fig. 4b the heat exchanger .34 comprises a number of metal plates or wire mesh 35 separated by air gaps longitudinally and laterally. The plates are alternately heated by hot gases exhausting from the turbine, these having been heated by burners 131, 132, the combustion continuing throughout the flow through the turbine and exhaust pipe 46, and cooled by compressed air entering by way of a pipe 32' and passing upwards to the inlet pipe 44. Cams 40 on driven shafts 41, 41', control the valves 39, 37, which regulate the two streams of gas. Further plant layouts embody two heat exchangers, the streams of gas from the compressor and turbine flowing through either in series or parallel. A radial flow turbine or compressor may be used. The compressor may be cooled by water injection.