Hydraulic Circuit Mixing Control for District Heating Water
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Solution Overview
Problem
Existing hydraulic groups for dwelling heating and sanitary warm water distribution in district heating systems are complex to set up, bulky, and costly, with difficulties in isolating user modules when no demand is present, leading to inefficient operation and high installation costs.
Innovation Solution
A compact hydraulic circuit with integrated three-way valves, temperature sensors, and electronic control units that allow for precise temperature regulation and flow rate management, enabling easy connection, servicing, and cost-effective installation, along with a bypass mechanism to prevent unnecessary energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a compact hydraulic circuit with integrated valves and control units is used, then the device complexity and installation space are reduced, but the manufacturing precision and assembly difficulty increase
Solution Approach 1:
The patent integrates the three-way valve, temperature sensors, electronic control unit, and bypass mechanism into a single compact hydraulic circuit assembly. This merging of previously separate components into one integrated unit reduces the overall installation space and simplifies the system architecture while maintaining precise temperature control capabilities through the coordinated operation of integrated sensors and actuators.
2Productivity
If precise temperature regulation and flow rate management are implemented, then the operation efficiency and user comfort are improved, but the device complexity and installation cost increase
Solution Approach 1:
The electronic control unit continuously monitors temperature sensor readings and automatically adjusts the three-way valve position to maintain the desired temperature setpoint. This self-regulating mechanism eliminates the need for manual intervention or complex external control systems, achieving precise temperature regulation through automated feedback control while keeping the overall system relatively simple.
Solution Approach 2:
The system employs temperature sensors that continuously monitor the water temperature and provide feedback to the electronic control unit. Based on this feedback, the controller dynamically adjusts the three-way valve to maintain the desired temperature, enabling precise temperature regulation through a relatively simple closed-loop control mechanism.
3Loss of energy
If a bypass mechanism is added to exclude user modules when no demand is present, then the energy efficiency is improved, but the device complexity increases
Solution Approach 1:
The bypass mechanism is designed to dynamically open or close based on the operational status of the user module. When no hot water demand is detected, the bypass automatically opens to allow hot water to circumvent the inactive module, preventing unnecessary energy consumption. This dynamic adaptation is controlled through simple sensors and actuators that respond to flow conditions without adding significant system complexity.
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 solution provides a simplified, cost-effective, and compact system for managing dwelling heating and sanitary warm water distribution, ensuring efficient operation and user flexibility by allowing for precise temperature control and energy management, reducing installation costs and space requirements.
Implementation Method 1
sanitary warm water is obtained by heating the water drawn from the mains in a heat exchanger into which exchanger the hot water from the 'centralized' source is diverted
Data Source
AI summary
A hydraulic circuit (10) for providing heating water and sanitary warm water to a user premise, said circuit being connected to a central hot water supply (1, 2) and comprising a pump (P), a water-water heat exchanger (6), a routing device (11) and control means (25) for delivering said central supply hot water, through said routing device (11), respectively to the user heating plant (R) or to said heat exchanger (6) when the user requires sanitary warm water. The circuit comprises a delivery hydraulic group (10A) and a return hydraulic group (10B) connected to one another by said water-water heat exchanger (6) adapted to produce sanitary warm water; and a mixing valve (5) to divert a part of the return water from said heating plant (R) and mix it with the hot water from said central supply of hot water (1, 2) under the control of said control means (25).