An electric power generating system includes an autoclave coupled to a natural gas source, an oxygen source, and having a pressure reducing outlet valve. A high-pressure pump provides a solution of ammonium hydroxide and ammonium carbonate solution under pressure to the autoclave. An exothermic reaction generates high-pressure steam for electrical power generation. A crystallizer receives ammonium carbonate from the reaction for the formation of crystallized ammonium carbonate fertilizer.

An electric power generating system includes an autoclave coupled to a natural gas source, an oxygen source, and having a pressure reducing outlet valve. A high-pressure pump provides a solution of ammonium hydroxide and ammonium carbonate solution under pressure to the autoclave. An exothermic reaction generates high-pressure steam for electrical power generation. A crystallizer receives ammonium carbonate from the reaction for the formation of crystallized ammonium carbonate fertilizer.

A fluidized bed heat exchanger with a chamber (24) comprises a solid particles inlet port (22), a solid particles outlet port (30), arranged at a distance to the inlet port (22), means (46) for introducing a fluidizing gas from a bottom area into the chamber (24). The heat exchanger further comprises at least two heat transfer means (28) within the one chamber (24), each being provided with a heat transfer medium inlet port (42) and a heat transfer medium outlet port (44), wherein a first heat transfer means (28) is designed as a reheater and second heat transfer means (28) is designed as a superheater to achieve a heat transfer medium temperature and a heat transfer medium pressure above that of the reheater. At least one of the reheater or superheater is made of a multiplicity of heat transfer tubes arranged in a meandering fashion for conveying a heat transfer medium.

A fluidized bed heat exchanger with a chamber (24) comprises a solid particles inlet port (22), a solid particles outlet port (30), arranged at a distance to the inlet port (22), means (46) for introducing a fluidizing gas from a bottom area into the chamber (24). The heat exchanger further comprises at least two heat transfer means (28) within the one chamber (24), each being provided with a heat transfer medium inlet port (42) and a heat transfer medium outlet port (44), wherein a first heat transfer means (28) is designed as a reheater and second heat transfer means (28) is designed as a superheater to achieve a heat transfer medium temperature and a heat transfer medium pressure above that of the reheater. At least one of the reheater or superheater is made of a multiplicity of heat transfer tubes arranged in a meandering fashion for conveying a heat transfer medium.

A gas turbine includes: a compressor configured to compress air; a combustor configured to combust fuel in the air compressed by the compressor so as to generate combustion gas; and a turbine configured to be driven using the combustion gas. Air coolers are configured to bleed the air from a plurality of places having different pressures in the compressor and cool the air bled from the respective places so as to generate cooling air. A waste heat recovery device is configured to recover waste heat from at least two of the air coolers.

A gas turbine includes: a compressor configured to compress air; a combustor configured to combust fuel in the air compressed by the compressor so as to generate combustion gas; and a turbine configured to be driven using the combustion gas. Air coolers are configured to bleed the air from a plurality of places having different pressures in the compressor and cool the air bled from the respective places so as to generate cooling air. A waste heat recovery device is configured to recover waste heat from at least two of the air coolers.

The invention provides a composition comprising 1,1-difluoroethene (R-1132a); a second component selected from the group consisting of hexafluoroethane (R-116), ethane (R-170) and mixtures thereof; and, optionally carbon dioxide (CO.sub.2, R-744).

The invention provides a composition comprising 1,1-difluoroethene (R-1132a); a second component selected from the group consisting of hexafluoroethane (R-116), ethane (R-170) and mixtures thereof; and, optionally carbon dioxide (CO.sub.2, R-744).

Provided is a combustion system, and in particular a thermal decomposition system and plasma melting system, with which superheated steam is generated in an energy-efficient manner and the combustion structure has an improved combustion efficiency. A combustion system for making hot water coming from a boiler (11) into superheated steam with a superheated steam generation device (20) and supplying the superheated steam to a combustion structure (50) is provided with the following: the combustion structure (50) which combusts a fuel and a carbonaceous solid at 350 to 1,000 C.; a heat storage device (70) for storing waste heat from the combustion structure; and a heat exchange water tank (12) that is connected so as to allow heat exchange, through a heat transport medium, with heat from the heat storage device (70), and that heats water that is supplied to the boiler (11). The combustion system is provided with an oxyhydrogen gas supply structure (40) for heating the water supplied to the boiler (11) and also supplying an oxygen/hydrogen mixed gas, and a mixer (30) for mixing the superheated steam generated with the superheated steam generation device (20) and the oxygen/hydrogen mixed gas from the oxyhydrogen gas supply structure (40). The superheated steam is mixed with the oxyhydrogen gas and supplied to the combustion structure (50).

Provided is a combustion system, and in particular a thermal decomposition system and plasma melting system, with which superheated steam is generated in an energy-efficient manner and the combustion structure has an improved combustion efficiency. A combustion system for making hot water coming from a boiler (11) into superheated steam with a superheated steam generation device (20) and supplying the superheated steam to a combustion structure (50) is provided with the following: the combustion structure (50) which combusts a fuel and a carbonaceous solid at 350 to 1,000 C.; a heat storage device (70) for storing waste heat from the combustion structure; and a heat exchange water tank (12) that is connected so as to allow heat exchange, through a heat transport medium, with heat from the heat storage device (70), and that heats water that is supplied to the boiler (11). The combustion system is provided with an oxyhydrogen gas supply structure (40) for heating the water supplied to the boiler (11) and also supplying an oxygen/hydrogen mixed gas, and a mixer (30) for mixing the superheated steam generated with the superheated steam generation device (20) and the oxygen/hydrogen mixed gas from the oxyhydrogen gas supply structure (40). The superheated steam is mixed with the oxyhydrogen gas and supplied to the combustion structure (50).