Gas Turbine Combined Cycle Facility Layout for Water-Surface Stability
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Solution Overview
Problem
The installation of gas turbine combined cycle facilities on water-surface facilities, such as vessels or floating structures, faces challenges in minimizing floor space and height to maintain stability, as vertical stacking increases the center of gravity and instability.
Innovation Solution
The configuration includes a gas turbine unit with a heat recovery steam generator positioned at the same height, with boiler units stacked and aligned to facilitate parallel exhaust gas flow, and steam-water separators integrated with the boiler units to enhance steam production and circulation, while keeping accessories below the gas turbine unit to reduce overall height and floor space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If devices are vertically stacked to reduce installation floor space, then the height of the GTCC facility increases, but the center of gravity becomes high causing large shaking of water-surface facilities
Solution Approach 1:
The patent transitions from vertical stacking to horizontal arrangement by disposing the heat recovery steam generator side-by-side with the gas turbine unit. The exhaust gas flow direction in the HRSG is made parallel to the turbine axis direction, utilizing the horizontal dimension to accommodate the HRSG without increasing height. This dimensional change allows reduced floor space usage while maintaining a low center of gravity for stability on water-surface facilities.
2Stability of the object's composition
If the height of the GTCC facility is suppressed to lower the center of gravity, then the installation floor space must be increased, but the available area on water-surface facilities is limited
Solution Approach 1:
The patent merges the gas turbine unit and heat recovery steam generator into a closely integrated configuration where the HRSG is disposed at the same position as the gas turbine unit in the height direction. This merging allows compact horizontal arrangement that reduces floor space while maintaining low height. The exhaust duct directly connects the gas turbine to the HRSG, creating a unified system that optimizes space utilization without compromising stability.
3Length of stationary object
If the heat recovery steam generator is disposed side-by-side with the gas turbine unit, then the height is reduced, but the exhaust gas flow path becomes more complex
Solution Approach 1:
The patent applies local quality by making the exhaust gas flow direction in the HRSG parallel to the turbine axis direction. This localized alignment of flow directions simplifies the exhaust duct configuration despite the side-by-side arrangement. The exhaust duct is designed to guide exhaust gas efficiently from the gas turbine to the HRSG with minimal complexity, optimizing the local flow path geometry to match the overall compact layout.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration achieves a lower center of gravity, enhances stability, and optimizes space usage by reducing the weight and installation area of the GTCC facility, improving both operational efficiency and maintenance accessibility.
Implementation Method 1
a heat recovery steam generator for recovering exhaust heat from exhaust gas produced by the gas turbine unit and producing steam
Implementation Method 2
a steam-water separator that separates steam and water, which have been produced in each of the boiler units
Data Source
AI summary
A gas turbine combined cycle (GTCC) facility (10A) provided with a gas turbine unit (20), a heat recovery steam generator (30) for recovering heat and producing steam from exhaust gas produced by the gas turbine unit (20), and an exhaust duct (32) for guiding the exhaust gas of the gas turbine unit (20) to the heat recovery steam generator (30). At least a portion of the heat recovery steam generator (30) is disposed in the same plane as the gas turbine unit (20), and the heat recovery steam generator (30) is disposed side-by-side so that a direction in which exhaust gas flows in the heat recovery steam generator is parallel to a turbine axis direction of the gas turbine unit.