Water heating system including multi-function heat source apparatus
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Solution Overview
Problem
In water heating systems where a multi-function heat source apparatus for space-heating and hot water supply is connected in parallel with a heat source apparatus for hot water supply, the challenge is to maintain the space-heating function while optimizing hot water output, as existing systems often compromise on space-heating performance due to the diversion of heating power for hot water supply.
Innovation Solution
A water heating system design that includes a first heat source apparatus for space-heating and a second heat source apparatus for hot water supply, connected in parallel with a cut-off mechanism that allows the first heat source to prioritize space-heating when the hot water supply load is low, and both sources to work together when the load is high, ensuring maximum hot water supply without compromising space-heating performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hot water supply is started by outputting hot water from the first hot water supply circuit (multi-function heat source apparatus), then hot water supply capacity is increased, but space-heating function deteriorates due to diversion of heating power
Solution Approach 1:
The system segments the hot water supply function into two independent circuits: the first hot water supply circuit (multi-function heat source apparatus) and the second hot water supply circuit (dedicated hot water heater). This segmentation allows the dedicated circuit to handle hot water supply demands without compromising the space-heating function of the multi-function apparatus, as each circuit operates independently with its own heat source.
Solution Approach 2:
The control mechanism acts as an intermediary that coordinates between the two hot water supply circuits. It determines when to activate the first circuit based on hot water demand and space-heating requirements, and when to rely solely on the second circuit, thereby mediating the conflict between hot water supply capacity and space-heating function maintenance.
2Productivity
If hot water is output from both first and second hot water supply circuits in parallel, then hot water supply capacity is maximized, but control complexity increases
Solution Approach 1:
The system dynamically adjusts the operation state of the first hot water supply circuit based on real-time conditions. The control mechanism monitors hot water demand and space-heating requirements, and dynamically switches between three states: first circuit only, second circuit only, or both circuits in parallel, optimizing hot water supply capacity while adapting to changing system conditions.
Solution Approach 2:
The control mechanism incorporates feedback from hot water demand signals and space-heating operation status to make intelligent decisions about circuit activation. By continuously monitoring system state and adjusting circuit operation accordingly, the feedback mechanism simplifies control logic compared to always operating in parallel, as it activates circuits only when necessary.
3Reliability
If the first heat source apparatus prioritizes space-heating when hot water supply load is low, then space-heating function is maintained, but hot water supply capacity is reduced
Solution Approach 1:
The system dynamically switches between space-heating priority mode and hot water supply priority mode based on load conditions. When hot water supply load is low, the first circuit prioritizes space-heating; when load is high, the control mechanism activates the first circuit for hot water supply (possibly in parallel with the second circuit), thereby dynamically balancing space-heating maintenance with hot water supply capacity enhancement.
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 enhances the hot water supply capacity while minimizing the impact on space-heating performance by strategically managing the flow paths and energy distribution between the two heat sources, thereby maintaining the integrity of the space-heating function.
Implementation Method 1
a first heat source apparatus for space-heating and hot water supply (multi-function heat source apparatus) which heats low-temperature water
Implementation Method 2
the cut-off mechanism opens the flow path in the first hot water supply circuit to allow output of hot water from both of the first and second hot water supply circuits
Implementation Method 3
supply of a heat medium to a space-heating terminal by using a common heat source
Data Source
AI summary
When a hot water supply operation is started, a single mode is used in which hot water is output only from a second hot water supply circuit of a water heater, by cut-off of a flow path in a first hot water supply circuit of a space-heating water heater by a cut-off mechanism. When a load imposed by hot water supply by the second hot water supply circuit increases during the hot water supply operation in the single mode, the cut-off mechanism is opened to start hot water output from the first hot water supply circuit and a hot water supply operation in a parallel mode is performed in which hot water is output from both of the first hot water supply circuit and the second hot water supply circuit.