Flow Temperature Control for Fast Room Heating Without Efficiency Loss

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Solution Overview

Problem

Existing heating systems take a long time to reach comfort temperature in heatable rooms, and methods to speed up this process either reduce efficiency or cause unnecessary heating and noise.

Innovation Solution

Increasing the flow temperature of the heat transfer medium during the heating-up phase and controlling it back to normal operation when the comfort temperature is reached, with the option to prioritize heating in individual rooms and adjust valve operations to maximize heat output.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If the flow temperature is increased to reach comfort temperature faster, then the heating-up time is reduced, but the efficiency of the heat generator drops

Engineering Contradiction:
Improveheating-up timeVSAvoidheat generator efficiency
Core Design Contradiction:
Loss of timeVSLoss of energy

Solution Approach 1:

The control unit raises the flow temperature in advance before the comfort time window begins, so that the room temperature increases during the transition period. This preliminary heating action ensures that when the comfort time window starts, the room is already at or near the comfort temperature, eliminating the need for high-temperature heating during the comfort period and thus maintaining heat generator efficiency.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system dynamically adjusts the flow temperature based on the operational phase: higher temperatures are applied during the heating-up phase (before comfort time window) and lower temperatures during the comfort time window. This dynamic adjustment optimizes both heating speed and efficiency by matching temperature levels to actual heating needs at different times.

Inventive Principle:
Principle #15Dynamics

2Temperature

If the heating-up phase is extended to reach comfort temperature before comfort time window, then the comfort temperature is achieved on time, but the room temperature is higher than necessary outside comfort time windows

Engineering Contradiction:
Improveroom temperatureVSAvoidunnecessary heating
Core Design Contradiction:
TemperatureVSLoss of energy

Solution Approach 1:

The control unit continuously monitors the room temperature and uses this feedback to adjust the flow temperature. When the room temperature approaches the comfort temperature before the comfort time window, the control unit reduces the flow temperature to prevent overheating. This feedback mechanism ensures the room reaches exactly the comfort temperature at the right time without excessive heating, minimizing energy waste.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system changes the flow temperature parameter dynamically based on the heating phase and room temperature conditions. During the heating-up phase, the flow temperature is raised to accelerate heating, but once the room temperature approaches the target, the flow temperature is reduced. This parameter adjustment allows precise control over the heating process, achieving comfort temperature on time while avoiding unnecessary energy consumption.

Inventive Principle:
Principle #35Parameter changes

3Loss of time

If the heat generator starts up earlier to preheat the room, then the comfort temperature is reached on time, but noise emissions increase during night hours

Engineering Contradiction:
Improvetime to reach comfort temperatureVSAvoidnoise emissions
Core Design Contradiction:
Loss of timeVSObject-affected harmful factors

Solution Approach 1:

The system replaces mechanical preheating (which causes noise) with electronic control of the flow temperature. Instead of starting the heat generator early and running it at high power (mechanical action that produces noise), the control unit electronically adjusts the flow temperature parameter to optimize heating timing. This substitution of electronic control for mechanical operation eliminates noise emissions while achieving the same heating objective.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

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 approach allows for faster attainment of comfort temperature without reducing heating system efficiency and minimizes unnecessary heating, ensuring comfort is reached efficiently and quietly.

Implementation Method 1

a flow temperature of a heat transfer medium (usually water) supplied by a heat generator

Methodology Applied
Scientific EffectHeat transfer: Conduction (thermal)

Implementation Method 2

the heat transfer medium flows through the heat emitter

Methodology Applied
Scientific EffectConvection: Convection

Data Source

PatentEP4036681B1Method and assembly for increasing the temperature in at least one heatable chamber
Publication Date: 2023.08.16 VAILLANT GMBH(DE)
  • EP4036681B1 patent drawingFigure 1

AI summary

The invention relates to a method and an arrangement for increasing the temperature in at least one heated room (2, 3, 4) with at least one heat emitter (5, 6, 7) from a reduced temperature to a comfort temperature, wherein a flow temperature provided by a heat generator (1) for normal operation is increased by a predefinable value or to a maximum temperature and, upon reaching the comfort temperature in the room (2, 3, 4) or after a predefinable time interval, is reduced again to the temperature specified for normal operation. The present invention makes it possible to quickly raise the temperature in one or more heated rooms from a reduced temperature to a comfort temperature without reducing the efficiency of a heating system during normal operation.