A heat recovery steam generator (HRSG) includes a first casing having an interior enclosing at least one duct for gas to flow therein along a gas flow axis. Each duct is defined by duct defining members that are spaced apart from each other and extend into the interior of the first casing. A plurality of stiffening members are elongated along the gas flow axis. Each of the stiffening members are positioned between two of the duct defining members. The stiffening members and duct defining members have a substantially similar coefficient of thermal expansion.

A heat recovery steam generator (HRSG) includes a first casing having an interior enclosing at least one duct for gas to flow therein along a gas flow axis. Each duct is defined by duct defining members that are spaced apart from each other and extend into the interior of the first casing. A plurality of stiffening members are elongated along the gas flow axis. Each of the stiffening members are positioned between two of the duct defining members. The stiffening members and duct defining members have a substantially similar coefficient of thermal expansion.

An exhaust gas flow regulator and a heat recovery steam generator including the same are provided. The exhaust gas flow regulator includes a plurality of first tubes spaced apart from each other in a vertical direction, a support plate disposed in a direction perpendicular to the extension direction of the first tubes and through which the plurality of first tubes penetrates, and a second tube disposed at one or both ends of the support plate so as to be coupled to the support plate and extending parallel to the first tubes, wherein the second tube is provided with a guide plate disposed to redirect exhaust gases flowing adjacent to the second tube toward the first tube.

An evaporator includes an introducing portion that introduces a heat source gas from a heat source gas pipe, a heat source gas passage through which the heat source gas introduced from the introducing portion flows, a heating portion that is disposed in the heat source gas passage and at which a working fluid is heated by the heat source gas, an increasing portion at which a cross-sectional area of the heat source gas passage gradually increases from an upstream side towards a downstream side in the heat source gas passage, and a flow regulating plate that is disposed on an upstream side from the heating portion in the heat source gas passage and that has a plurality of holes which allow the heat source gas to pass through the plurality of holes.

An evaporator includes an introducing portion that introduces a heat source gas from a heat source gas pipe, a heat source gas passage through which the heat source gas introduced from the introducing portion flows, a heating portion that is disposed in the heat source gas passage and at which a working fluid is heated by the heat source gas, an increasing portion at which a cross-sectional area of the heat source gas passage gradually increases from an upstream side towards a downstream side in the heat source gas passage, and a flow regulating plate that is disposed on an upstream side from the heating portion in the heat source gas passage and that has a plurality of holes which allow the heat source gas to pass through the plurality of holes.

An evaporator includes an introducing portion that introduces a heat source gas from a heat source gas pipe, a heat source gas passage through which the heat source gas introduced from the introducing portion flows, a heating portion that is disposed in the heat source gas passage and at which a working fluid is heated by the heat source gas, an increasing portion at which a cross-sectional area of the heat source gas passage gradually increases from an upstream side towards a downstream side in the heat source gas passage, and a flow regulating plate that is disposed on an upstream side from the heating portion in the heat source gas passage and that has a plurality of holes which allow the heat source gas to pass through the plurality of holes.

A steam generator (1), in particular for an oven, comprising a tank (3) provided with an inlet pipe (4) suitable for introducing liquid into the tank (3) and an outlet pipe (5) suitable for releasing steam from the tank (3); at least one heating element (2) adapted to heat the liquid to produce the steam; wherein the tank (3) comprises: a first chamber (31); a second chamber (32); a third chamber (33), proximal to the outlet pipe (5); wherein the first chamber (31) and the second chamber (32) are adapted to contain the liquid introduced by means of said inlet pipe (4); wherein a first partition wall (41) is provided, which partially separates the first chamber (31) and the second chamber (32) from each other; wherein a second partition wall (42) is provided, which separates at least partially both the first chamber (31) and the second chamber (32) from the third chamber (33); wherein a first passage (21) is provided which allows the steam to pass from the first chamber (31) to the second chamber (32); wherein a second passage (22) is provided which allows the steam to pass from the second chamber (32) to the third chamber (33); wherein a third passage (23) is provided which allows the liquid to pass between the second chamber (32) and the first chamber (31), near the bottom (6) of the tank (3).

A steam generator (1), in particular for an oven, comprising a tank (3) provided with an inlet pipe (4) suitable for introducing liquid into the tank (3) and an outlet pipe (5) suitable for releasing steam from the tank (3); at least one heating element (2) adapted to heat the liquid to produce the steam; wherein the tank (3) comprises: a first chamber (31); a second chamber (32); a third chamber (33), proximal to the outlet pipe (5); wherein the first chamber (31) and the second chamber (32) are adapted to contain the liquid introduced by means of said inlet pipe (4); wherein a first partition wall (41) is provided, which partially separates the first chamber (31) and the second chamber (32) from each other; wherein a second partition wall (42) is provided, which separates at least partially both the first chamber (31) and the second chamber (32) from the third chamber (33); wherein a first passage (21) is provided which allows the steam to pass from the first chamber (31) to the second chamber (32); wherein a second passage (22) is provided which allows the steam to pass from the second chamber (32) to the third chamber (33); wherein a third passage (23) is provided which allows the liquid to pass between the second chamber (32) and the first chamber (31), near the bottom (6) of the tank (3).