GB530311A - Combustion-product power plant - Google Patents

Abstract

530,311. Combustion-product power plant. MASCHINENFABRIK OERLIKON. May 1, 1939, No. 13007. Convention date, April 30, 1938. [Class 7 (i)] [Also in Group XXVI] In a power plant in which heat is supplied to air or other gas at constant volume and withdrawn from it at constant pressure and in which, after pre-heating and before expansion in a power engine or turbine, combustion takes place in the air or gas, a combustion chamber is in open or controlled communication with the main constantvolume chamber and at one part at least its temperature is maintained constantly above the ignition point of the fuel-air &c. mixture therein. In one form, Fig. 1, a number of chambers VB1, VB2 &c. are connected in turn to the chamber VA of a heat-exchanger 1 heated by exhaust gases from an engine or turbine 6, each of the chambers VB1 &c. forming with the chamber VA the constant-volume chamber. Each chamber VB1 &c. communicates with a combustion chamber B1 &c. into which fuel is injected at h1 &c. In operation, a compressor 4 driven by an engine or turbine 5 feeds air through a pipe a and valve la to the chamber VB1 and scavenges the residual hot gases through a valve 1b and pipe b to a collecting chamber 7. The valves 1a, 1b are then closed and valves 1d, 1e opened, and a blower 8 circulates the air from the chamber VB, through the chamber VA of the exchanger ; simultaneously or subsequently, fuel is injected at h1 in the chamber B1, in which a temperature above ignition point is maintained by a flame, ignition wire, or other means. The valves 1d, 1e are closed and a valve 1c opened to discharge the gases to the turbine 5, from which the exhaust is conveyed through the collecting chamber 7 to the turbine 6 and thence to the chamber VC of the exchanger 1. A generator 9 may be driven by the turbines 5, 6. The valves are so controlled that during the filling period in one of the chambers VB1, a second chamber VB2 takes up heat at constant volume and the third VB3 discharges its gases to the power engine. In -modifications, (a) the pipe d is connected through the valves 1d to the combustion chambers B1 &c. so that the circulating air enters the chambers VB1 through the combustion chambers, and the gases from the chambers VB1 are cooled in a heat-exchanger before entering the turbine 5 ; (b) the circulating air enters the chambers VB1 directly, and only discharges through the combustion chamber to the power engine after the closing of the valves 1d, 1e and opening of the valve 1c; (c) the gases enter and leave through the combustion chamber, the valves 1c, 1d both being connected to the combustion chamber ; (d) a single combustion chamber B, Fig. 3, is arranged adjacent to the heat exchanger 1, and the gases leaving the chamber B pass through the chamber VD of an exchanger 10 to generate steam in a chamber VE. The steam is superheated at 11, expands in a turbine 12 and the exhaust steam circulates through a condenser 13 and heater 14 to the generator chamber VE. The pipe line d may pass through the chamber VF of the superheater 11. The combustion chamber B may be enclosed in the chamber VE, Fig. 4, or pipes VE, Fig. 5, may pass through or around the chamber B.