Method for operating a heating assembly and heating assembly
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Solution Overview
Problem
Conventional heating systems face inefficiencies due to fixed reference room control, which can lead to excessive energy consumption and uneven heating distribution, as they do not account for internal and external energy inputs or the thermal and hydraulic characteristics of individual rooms.
Innovation Solution
A dynamic reference room control method that adjusts the flow temperature based on the current actuator openings in the heating system, optimizing the operation by determining the reference room dynamically and coupling the control loops for flow temperature and actuator openings, ensuring all rooms receive sufficient heat evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If weather-compensated flow temperature control is used, then the flow temperature can be determined as a function of outside temperature, but the flow temperature cannot be adjusted based on actual building heat requirements leading to excessive energy consumption
Solution Approach 1:
The patent implements feedback by continuously monitoring the actuator opening degree from individual room controllers and using this information to dynamically adjust the flow temperature. The control device receives signals from multiple room controllers and adjusts the flow temperature based on the actual heat requirements reflected by actuator positions, creating a closed-loop control system that prevents energy waste while maintaining comfort.
Solution Approach 2:
The patent transitions from static weather-compensated control to dynamic reference room control where the reference room is continuously selected based on which room has the most open actuator. The system dynamically adapts the flow temperature setting based on real-time actuator opening degrees, allowing the control strategy to change continuously according to actual building conditions and heat requirements.
2Ease of operation
If a fixed reference room is used for control, then the control system is simple to operate, but other rooms may not receive sufficient heat due to thermal and hydraulic variations
Solution Approach 1:
The system dynamically selects the reference room based on real-time actuator opening degrees rather than using a fixed reference room. The control device continuously monitors all room controllers and identifies which room has the most open actuator, making that room the temporary reference. This dynamic selection ensures that the room with the highest heat requirement drives the flow temperature adjustment, guaranteeing sufficient heat distribution to all rooms including those with higher thermal losses or hydraulic resistance.
Solution Approach 2:
The system allows the heating system itself to automatically identify which room needs the most heat through the actuator opening degrees, eliminating the need for manual selection of reference rooms or complex thermal calculations. The room with the most open actuator self-identifies as the reference room, and the control device automatically adjusts parameters accordingly, providing adaptive heating distribution without additional complexity.
3Adaptability or versatility
If individual room control with room thermostats is used, then each room can be controlled independently, but there is no feedback on flow temperature leading to suboptimal energy efficiency
Solution Approach 1:
The patent merges individual room control with centralized flow temperature control by having the control device collect actuator opening degree information from all individual room controllers and use this aggregated data to adjust the flow temperature. This combination maintains the benefits of individual room control while adding system-level optimization through flow temperature adjustment based on overall building requirements, improving energy efficiency without sacrificing individual room adaptability.
Solution Approach 2:
The system implements feedback by having individual room controllers send their actuator opening degree information to the central control device, which then adjusts the flow temperature based on this feedback. This creates a hierarchical control structure where local room control is complemented by system-wide optimization, allowing the flow temperature to be dynamically adjusted in response to actual heat requirements indicated by actuator positions.
Data Source
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AI summary
The invention relates to a method for operating a heating system (1) in a building with at least one heated room (R1). The heating system (1) comprises at least one radiator (HK1) in each heated room (R1). The at least one radiator (HK1) comprises an actuator (V1) for adjusting the flow rate through the radiator (HK1). The heating system (1) comprises a heat generator (WE) for heating a heat transfer medium, which flows via a supply line (VL) to the at least one radiator (HK1) and via a return line (RL) back to the heat generator (WE). A pump (P) for circulating the heat transfer medium is arranged in the supply line (VL) or return line (RL). A temperature sensor for determining the supply temperature (TVL) of the heat transfer medium is arranged in the supply line (VL). A temperature sensor for determining the actual room temperature (TR) of the room (R1) is arranged in the at least one heated room (R1).The heating system (1) comprises a control unit (Z) that regulates or controls the heat generator (WE) to set the flow temperature (TVL) of the heat transfer medium to a predetermined flow setpoint temperature (TVL,W), and a room temperature controller for regulating the room temperature by setting an actuator opening (Hakt) of the actuator (V1) depending on a predetermined room setpoint temperature (TR,W) and the determined actual room temperature (TR). The procedure comprises the steps of detecting the current actuator opening (Hakt) of the actuator (V1) of the at least one radiator (HK1); determining the flow setpoint temperature (TVL,W) depending on the current actuator opening (Hakt) of the actuator (V1) of the at least one radiator (HK1); and determining a set of control parameters (Kp, Ki) for operating the room temperature controller depending on the current actuator opening (Hakt) of the actuator (V1).