Installation of sanitary hot water
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Solution Overview
Problem
Existing hot water installations require continuous circulation or manual control via timers or temperature sensors to maintain desired water temperature, leading to inefficiencies and unnecessary energy consumption.
Innovation Solution
A control switch with a small turbine mechanism is installed on the cold water branch, activated by water flow, which initiates and stops hot water circulation independently of temperature or time settings, using a flow sensor and temperature sensor to optimize water heating and reduce energy usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If continuous water circulation is maintained to obtain hot water at desired temperature, then hot water availability is improved, but energy consumption increases
Solution Approach 1:
The system uses periodic circulation instead of continuous circulation. The pump is activated only when hot water is needed, as detected by the flow sensor on the cold water branch, and deactivated after a predetermined time period or when hot water temperature is reached, thereby reducing energy consumption while maintaining hot water availability.
Solution Approach 2:
The system automatically detects water flow on the cold water branch and initiates hot water circulation without manual intervention. The control system monitors flow conditions and autonomously activates/deactivates the pump, eliminating the need for continuous operation or manual timer control.
2Loss of energy
If pump power is controlled by timer or temperature sensor to reduce energy consumption, then energy efficiency is improved, but response time to provide hot water increases
Solution Approach 1:
The flow sensor is installed on the cold water branch upstream of the heating device, allowing the system to detect water flow before the hot water circulation is actually needed. This early detection triggers the pump to start circulating hot water in advance, reducing response time while avoiding unnecessary energy consumption by not activating the pump until flow is detected.
3Ease of operation
If flow sensor is installed on hot water branch to detect water movement, then hot water circulation control is improved, but sensor activation reliability decreases due to pressure differences and temperature effects
Solution Approach 1:
The system uses the cold water branch as an intermediary location for flow detection. By installing the flow sensor on the cold water branch where water flow conditions are more stable and less affected by heating processes, the system achieves more reliable sensor activation without direct exposure to the thermal and pressure variations present in the hot water branch.
4Temperature
If pump operates continuously or based on temperature sensor to maintain hot water, then hot water temperature stability is improved, but component service life decreases
Solution Approach 1:
The pump operates periodically rather than continuously, being activated only when hot water is needed and deactivated after a predetermined time period or when the desired temperature is reached. This reduced operational duty cycle extends the service life of the pump and other system components while still maintaining hot water temperature stability when required.
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 solution reduces energy consumption by quickly providing hot water, extends the service life of components, and allows for the use of less expensive, eco-friendly materials, while minimizing random activations and residue deposition, thus lowering operational costs and improving system efficiency.
Implementation Method 1
The control switch has an element comprising an element in the form of a small turbine, that is activated mechanically by means of water flow
Data Source
Figure 1
Figure 2
AI summary
The invention solves the problem of hot water flow in a domestic hot water installation. The subject of the installation according to the invention is that on a third cold water branch (13) that feeds the heating device (1) a control switch (4) is installed, said switch (4) is connected by control system (11) with hot water flow forcing device (3) set on a second hot water circulation branch (2).