Smart Boiler Two-Chamber Design for Waste-Heat Water Heating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Home water heating systems face inefficiencies due to the distance between the heating source and point of use, leading to significant waste of water and energy, as well as the need for further heating to achieve the final temperature, which existing systems fail to address optimally.
Innovation Solution
A 'smart boiler' system divided into two chambers by a flexible barrier, located near the point of use, which heats water to its final temperature efficiently by recirculating and redistributing water between chambers, ensuring constant temperature delivery and minimizing energy waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If water is heated at a location remote from the point of use, then the heating source can be positioned away from the point of use, but significant water and energy are wasted due to pipe warming and residual water disposal
Solution Approach 1:
The system preheats incoming cold water using waste heat from outgoing hot water before the water reaches the point of use. This preliminary heating action reduces the energy burden on the main heating source and minimizes energy waste during water transport through pipes.
Solution Approach 2:
The system converts the waste heat in outgoing hot water (which would otherwise be discarded) into a useful resource for preheating incoming cold water. This transforms a harmful waste product into a beneficial heating source, significantly reducing overall energy consumption.
2Loss of energy
If a heat exchanger is used to preheat incoming water with waste water, then energy efficiency is improved, but the water still requires further heating to reach final temperature
Solution Approach 1:
The heating system is segmented into two distinct stages: a first heating stage using waste heat exchange for preheating, and a second heating stage using a local heater at or near the point of use for final temperature achievement. This segmentation allows each stage to be optimized independently, reducing overall system complexity while maintaining high efficiency.
Solution Approach 2:
The system applies different heating qualities to different portions of the water heating process. The first stage uses low-grade waste heat for preheating, while the second stage uses high-grade local heating for final temperature adjustment. This local quality approach matches the heating method to the specific temperature requirements at each stage.
3Loss of time
If water is heated in advance and stored in pipes, then hot water is available immediately at the point of use, but energy is continuously wasted to maintain temperature
Solution Approach 1:
The system uses the outgoing hot water to automatically preheat the incoming cold water through the heat exchanger, without requiring external energy input. The waste heat from the outgoing water serves itself to prepare the incoming water, eliminating the need for continuous energy expenditure to maintain temperature in stored water.
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
The smart boiler system reduces water and energy waste by maintaining a constant temperature during supply and efficiently heating water to the desired temperature, addressing the inefficiencies of traditional systems by optimizing the heating process near the point of use.
Implementation Method 1
passing the waste water (greywater or blackwater) and the incoming mains water through a heat exchanger, thereby warming the incoming mains water
Implementation Method 2
a heater positioned to heat water to a desired temperature
Data Source
AI summary
A system and method for providing hot water to a point of use such as a shower. Waste warm water from said point of use passes through a heat exchanger, where it initially warms incoming mains water, typically to about 34° C. The initially warmed water is heated to its final temperature, typically about 42° C., in a smart boiler. The smart boiler, which typically has a volume of about 40 liters, comprises two chambers with a flexible barrier therebetween. Each chamber is separately heated as needed. Hot water is drawn from one of the two chambers; simultaneously, the other chamber fills with initially warmed water and is heated to its final temperature. When the volume of water in the chamber from which water is being drawn reaches a minimum, the system begins to fill that chamber and to draw water from the other one.