Instant Hot Water Shower Head With Passive Thermostatic Recirculation
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Solution Overview
Problem
Existing water systems for bathing and showering waste significant amounts of potable water due to the cooling of hot water in piping systems between uses, leading to a substantial daily and annual water loss.
Innovation Solution
A water conservation system utilizing thermostatic diverter valves to recirculate and mix cold water with stored hot water in an insulated chamber to maintain optimal temperature, ensuring immediate availability without electrical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If hot water is stored in piping system between uses, then water temperature is maintained, but water waste increases due to continuous circulation needed
Solution Approach 1:
The system performs preliminary heating and storage of water in an insulated chamber before actual use. The thermostatic diverter valve pre-circulates water through the insulated chamber during idle periods, so that when a user activates the shower, hot water is already ready for immediate dispensing without wasting cold water.
Solution Approach 2:
The thermostatic diverter valve automatically controls the recirculation and mixing of water based on temperature sensing, without requiring external control systems or electrical components. The system self-regulates by diverting cold water to mix with stored hot water in the insulated chamber, maintaining optimal temperature automatically.
2Temperature
If water is recirculated to maintain temperature, then optimal temperature is achieved, but energy consumption increases
Solution Approach 1:
The thermostatic diverter valve is a passive mechanical device that automatically senses water temperature and diverts cold water to mix with stored hot water in the insulated chamber without requiring electrical power, pumps, or external energy input. The system uses the existing water pressure and thermal energy already present in the stored hot water.
Solution Approach 2:
The system replaces active electrical heating or pumping systems with a passive mechanical thermostatic diverter valve that uses temperature-sensitive mechanical components to automatically control water mixing, eliminating the need for electrical energy consumption.
3Temperature
If complex plumbing modifications are made to implement temperature control, then temperature stability is improved, but installation complexity increases
Solution Approach 1:
The device is designed to be universally compatible with standard shower and bath installations, requiring minimal modifications to existing plumbing. The thermostatic diverter valve integrates into the existing water supply lines and works with standard showerheads, making installation straightforward without requiring specialized plumbing expertise or complex custom fabrication.
4Temperature
If water is diverted from cold water source during heating, then temperature efficiency is improved, but water flow availability decreases
Solution Approach 1:
The insulated chamber continuously stores hot water from previous uses, ensuring that hot water is always available for immediate dispensing. The thermostatic diverter valve continuously mixes cold water with stored hot water to maintain optimal temperature, providing uninterrupted hot water flow without requiring continuous heating or causing interruptions in water availability.
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
Reduces water waste by maintaining optimal temperature for immediate use, conserving water without additional energy consumption and requiring minimal installation expertise.
Implementation Method 1
a series of thermostatic diverter valves that will control the circulation of water based on temperature
Implementation Method 2
Hot water generated from a previous bathing or showering use will be stored in an insulated chamber
Implementation Method 3
The device will be capable of recirculating water below the optimal temperature to mix with water at or near the optimal temperature until mixture is at or near the optimal temperature
Data Source
AI summary
A water conservation system having a series of thermostatic diverter valves that circulate water from both an internal insulated chamber that stores hot water from a previous use and a connected hot water source which utilizes a piping system where water cools down in between uses, through a network of internal channels based on the temperature of the water at any given time, thereby providing instant hot water in bathing and showering applications to a user, while not using electrical or mechanical heating elements of any kind.