Heating System Flow Control Using Return Pipe Temperature Sensing
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Solution Overview
Problem
Existing heating systems, particularly those using heat pumps, are inefficient due to suboptimal control strategies that do not maximize efficiency, and balancing heating systems is time-consuming and inaccurate.
Innovation Solution
A method and controller for controlling indoor heating systems that adjust fluid flow to heat emitters based on real-time temperature measurements, using remotely actuatable valves and a central controller to maintain target temperatures and minimize energy use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If heat pumps operate at high power to quickly achieve target temperature, then heating speed is improved, but energy efficiency deteriorates
Solution Approach 1:
The control system implements periodic cycling of the heat pump operation, switching between on and off states based on temperature thresholds. This allows the system to achieve rapid heating when needed while avoiding continuous high-power operation, thereby improving energy efficiency while maintaining adequate heating speed.
Solution Approach 2:
The system dynamically adjusts the heat pump operation based on real-time temperature measurements and predictive thermal models. By continuously adapting the heating strategy to current conditions, the system optimizes the balance between heating speed and energy efficiency, avoiding fixed high-power operation.
2Adaptability or versatility
If heat pumps heat water to high temperature to meet all room requirements, then temperature coverage is improved, but energy consumption increases
Solution Approach 1:
The system provides differentiated temperature control for different zones or rooms based on their specific thermal requirements. By measuring temperatures at multiple locations and adjusting heating locally, the system achieves comprehensive temperature coverage without the need to heat all water to the maximum temperature required by the coldest zone.
Solution Approach 2:
The control system dynamically adjusts water temperature parameters based on real-time thermal conditions in different zones. By changing temperature parameters locally rather than maintaining a uniformly high temperature throughout the system, the system achieves adequate coverage across all rooms while reducing overall energy consumption.
3Manufacturing precision
If manual balancing of heating systems is performed to optimize water flow, then temperature distribution is improved, but installation time increases
Solution Approach 1:
The heating system performs automatic self-balancing through embedded sensors and control algorithms that measure temperature distribution and adjust water flow parameters without requiring manual intervention. This self-service capability achieves optimal temperature distribution while eliminating the time-consuming manual balancing process during installation and maintenance.
Solution Approach 2:
The system incorporates continuous temperature monitoring and feedback control mechanisms that automatically adjust water flow to achieve balanced temperature distribution. This closed-loop feedback system replaces manual balancing procedures, maintaining precise temperature distribution while significantly reducing installation and maintenance time.
4Measurement precision
If multiple valves are installed at each radiator for flow control, then temperature control precision is improved, but system complexity increases
Solution Approach 1:
The system employs universal motorized valves that can function in multiple roles: precise flow control, balancing, and adaptive temperature regulation. These multi-functional valves replace the need for multiple specialized valves at each radiator, achieving temperature control precision while reducing overall system complexity through component consolidation.
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 system achieves efficient temperature control and balancing, reducing energy consumption and simplifying installation and maintenance by automating valve adjustments.
Implementation Method 1
These use phase change cycles or thermoelectric semiconductors to extract heat from the external environment and supply it to the water
Implementation Method 2
These use phase change cycles or thermoelectric semiconductors to extract heat from the external environment and supply it to the water
Implementation Method 3
In a radiator system, heated water is typically fed into a radiator, which has a high surface area and is made of a thermally conductive material, and thus transfers some of the heat from the water to the surrounding area
Implementation Method 4
In an underfloor heating system, heated water is typically fed, via a central manifold, into a network of thermally conducting pipes which extend and meander so as to present a very large surface area to the underside of a floor surface in a given room, thus transferring heat from the water to the floor and thence to the air in the room above
Data Source
AI summary
A system for heating an indoor environment comprising: a primary heat source for heating a heat transfer fluid; at least one remotely actuatable valve for stepped or continuous control of the flow rate of a heat transfer fluid through a return pipe outlet of a heat emitter; a pipe temperature sensor for measuring the temperature of a return pipe outlet of a heat emitter; an optional room temperature sensor for measuring the ambient temperature of an indoor environment; an optional user interface for receiving instructions from a user including at least one target ambient temperature; an electronic controller configured to receive temperature measurement information from each of the pipe temperature sensors and (optionally) temperature measurement information from each of the room temperature sensors, and further configured to provide control instructions to each of the remotely actuatable valves relating to flow rate control; wherein the electronic controller comprises a processor configured to determine the control instructions based at least in part on the temperature measurement information.