Abstract: A heat exchange unit (100) for hot gas recovery comprising, an inlet duct (34) to which a heat exchange duct (59) and a bypass duct (58) are connected, one being surrounded by the other, a heat exchange array (2) situated within the heat exchange duct (59) and a damper (50) arranged to direct the flow of gas through the unit (100), such that the damper (50) is situated within the inlet duct (34) and has two extreme positions, such that in a first extreme position the damper provides a first continuous surface and substantially seals one of the heat exchange and bypass ducts from the inlet duct and in the other extreme position the damper provides a second continuous surface and substantially seals the other of the ducts from the inlet duct.

Abstract: An integrated steam cycle power module (100) comprising a steam turbine (102) arranged to have steam supplied thereto; a steam manifold (104) arranged to have exhaust steam from the steam turbine supplied thereto; at least one heat exchanger (108) arranged to have exhaust steam supplied thereto from the manifold via risers which connect the manifold to headers (117) associated with the heat exchangers; and having the steam turbine situated below the steam manifold and arranged, in use, to vent exhaust steam to the manifold, which exhaust steam is passed to the heat exchanger in order to have heat extracted therefrom. Substantially all of the equipment required can be integrated into a compact module reducing plot space, overall costs and assembly time on site or allowing the module to be fabricated off site. The heat exchanger may be arranged to form substantially planar, substantially vertical walls along the side regions of the module.

Abstract: A heat exchange unit (214) arranged to be used to recover energy from exhaust gas, the heat exchange unit (214) comprising a gas inlet duct (222) to which a heat exchange duct (216) is connected, wherein a heat exchange array (752, 754) of a heat exchange system is situated within the heat exchange duct (216) surrounding a maintenance duct and wherein the maintenance duct (226) is arranged to allow access for inspection and/or maintenance of at least part of the heat exchange system.

Abstract: A heat exchange array arranged to be used in a heat exchange unit and further arranged to recover energy from an exhaust gas, comprising: a first heat exchange tube and a second heat exchange tube, each arranged to carry a heat exchange medium and further each comprising a series of external fins; and wherein the first heat exchange tube comprises a left-handed helically coiled tube having an first elastic stress, and the second heat exchange coil comprises a right-handed helically coiled tube having a second elastic stress, and wherein the first and second heat exchange tubes are interconnected such that the first elastic stress opposes the second elastic stress.

Abstract: A heat exchange unit (214) arranged to be used to recover energy from exhaust gas, the heat exchange unit (214) comprising a gas inlet duct (222) to which a heat exchange duct (216) is connected, wherein a heat exchange array (752, 754) of a heat exchange system is situated within the heat exchange duct (216) surrounding a maintenance duct and wherein the maintenance duct (226) is arranged to allow access for inspection and/or maintenance of at least part of the heat exchange system.

Abstract: A heat exchange unit (214) arranged to be used to recover energy from exhaust gas, the heat exchange unit (214) comprising a gas inlet duct (222) to which a heat exchange duct (216) is connected, wherein a heat exchange array (752, 754) of a heat exchange system is situated within the heat exchange duct (216) surrounding a maintenance duct and wherein the maintenance duct (226) is arranged to allow access for inspection and/or maintenance of at least part of the heat exchange system.

Abstract: A heat exchange unit (214) arranged to be used to recover energy from exhaust gas, the heat exchange unit (214) comprising a gas inlet duct (222) to which a heat exchange duct (216) is connected, wherein a heat exchange array (752, 754) of a heat exchange system is situated within the heat exchange duct (216) surrounding a maintenance duct and wherein the maintenance duct (226) is arranged to allow access for inspection and/or maintenance of at least part of the heat exchange system.

Abstract: A heat exchange unit (214) arranged to be used to recover energy from exhaust gas, the heat exchange unit (214) comprising a gas inlet duct (222) to which a heat exchange duct (216) is connected, wherein a heat exchange array (752, 754) of a heat exchange system is situated within the heat exchange duct (216) surrounding a maintenance duct and wherein the maintenance duct (226) is arranged to allow access for inspection and/or maintenance of at least part of the heat exchange system.

Abstract: A heat exchange unit (100) for hot gas recovery includes an inlet duct (34) in which a heat exchange duct (59) and a bypass duct (58) are connected, one being surrounded by the other, a heat exchange array (2) situated within the heat exchange duct (59) and a damper (50) arranged to direct the flow of gas through the unit (100), such that the damper (50) is situated within the inlet duct (34) and has two extreme positions, such that in a first extreme position the damper provides a first continuous surface and substantially seals one of the heat exchange and bypass ducts from the inlet duct and in the other extreme position the damper provides a second continuous surface and substantially seals the other of the ducts from the inlet duct.

Abstract: A heat exchange unit (100) for hot gas recovery comprising, an inlet duct (34) to which a heat exchange duct (59) and a bypass duct (58) are connected, one being surrounded by the other, a heat exchange array (2) situated within the heat exchange duct (59) and a damper (50) arranged to direct the flow of gas through the unit (100), such that the damper (50) is situated within the inlet duct (34) and has two extreme positions, such that in a first extreme position the damper provides a first continuous surface and substantially seals one of the heat exchange and bypass ducts from the inlet duct and in the other extreme position the damper provides a second continuous surface and substantially seals the other of the ducts from the inlet duct.