Hybrid Elevated Standpipe Water Tank Design
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Solution Overview
Problem
Conventional water towers experience a rapid drop in water pressure and emptying of the storage volume when the water level reaches the bottom of the elevated bowl, limiting the duration of water supply without increasing the overall height of the tank.
Innovation Solution
A hybrid water tank design combining a multi-legged elevated tank with a standpipe, featuring a large upper bowl and a constant diameter supporting tube, allowing for flexible geometry and secure access, which maintains near-constant pressure and volume, with the standpipe section providing emergency water storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a true elevated tank with a bowl is used, then water pressure is maintained through height, but the duration of water supply drops quickly to zero when the water level reaches the bottom of the bowl
Solution Approach 1:
The tank is divided into two distinct functional sections: an upper bowl section for maintaining hydrostatic pressure and a lower standpipe section for extending water supply duration. The bowl portion stores water at elevated height to provide pressure, while the standpipe portion extends downward to provide additional water volume that dispenses after the bowl empties, thereby resolving the contradiction between maintaining pressure and extending supply duration.
Solution Approach 2:
The invention extends the tank geometry into the vertical dimension by adding a standpipe section that projects downward from the bowl. This dimensional extension allows the system to maintain pressure (through the elevated bowl) while simultaneously increasing the total water volume available for supply (through the downward-extending standpipe), thus resolving the time duration limitation.
2Duration of action of moving object
If the volume of the reservoir is increased to extend water supply duration, then the duration of water supply increases, but the overall height of the water tank must be increased
Solution Approach 1:
The tank employs asymmetric geometry where the standpipe section has a significantly smaller diameter than the bowl section. This asymmetric design allows the standpipe to extend downward (increasing vertical footprint) while occupying minimal horizontal space, thereby increasing water storage volume and supply duration without proportionally increasing the overall height or ground space requirements.
Solution Approach 2:
The standpipe section is positioned within or adjacent to the bowl structure, creating a nested or integrated configuration. The wet center riser pipe is contained within the standpipe, and the entire assembly is integrated into the bowl structure, allowing the system to maximize water volume within a compact vertical envelope without excessive height increase.
3Quantity of substance
If a standpipe or constant diameter tube tank is used, then a large volume of water is stored, but the near constant pressure and volume characteristics of an elevated tank are lost
Solution Approach 1:
The invention merges the pressure-maintenance characteristics of an elevated bowl tank with the high-volume storage characteristics of a standpipe tank. The upper bowl section provides the elevated water column necessary for hydrostatic pressure, while the lower standpipe section provides additional volume. Together, they create a hybrid system that delivers both near-constant pressure and large water volume.
Solution Approach 2:
Different sections of the tank are assigned different functional qualities: the upper bowl section is optimized for maintaining pressure through elevation, while the lower standpipe section is optimized for maximizing storage volume. This local differentiation of function allows the system to simultaneously achieve both near-constant pressure and large water volume without compromise.
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 design extends the duration of water supply significantly, providing emergency water for several hours by storing a large volume of water at a high elevation, while maintaining day-to-day pressure and volume, outperforming traditional elevated and tube tank designs in terms of storage capacity and longevity.
Implementation Method 1
The height of the tower provides the hydrostatic pressure for the water supply system
Implementation Method 2
This type design provides the near constant pressure and volume that a true elevated tank provides
Implementation Method 3
The volume of the reservoir and diameter of the piping provide and sustain flow rate
Data Source
AI summary
A blending of geometrical shapes combine the best features of a pipe tank (standpipe) and a common multi-legged elevated tank. The bowl of an elevated tank has been designed as the top section of a standpipe or tube tank. This type design provides the near constant pressure and volume that a true elevated tank provides and a large volume of water for emergency purposes.