Energy saving system utilizing temperature sensing flow control valve to control chilled water circulation
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Solution Overview
Problem
Current chilled water loop control systems in air conditioning systems cannot effectively control the flow of chilled water, leading to unnecessary energy loss as excess water absorbs heat, increasing the temperature and requiring more ice production.
Innovation Solution
An energy-saving system utilizing a temperature sensing flow control valve is integrated into the chilled water loop, which adjusts the flow of chilled water based on temperature readings to minimize energy consumption by controlling the flow of chilled water through the air blower, reducing the burden on the water chiller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the chilled water loop continuously circulates large amounts of chilled water to maintain cooling capacity, then the cooling effect is ensured, but energy loss increases due to unnecessary heat absorption during flow
Solution Approach 1:
The patent applies dynamics by making the flow control valve adjustable based on temperature feedback. The valve opening degree is dynamically changed according to the detected temperature of chilled air, allowing the system to adapt the chilled water flow rate to actual cooling needs rather than maintaining constant high flow, thus reducing energy loss while ensuring cooling capacity.
Solution Approach 2:
The patent implements feedback control by using a temperature sensor to detect the temperature of chilled air and feed this information back to the flow control valve. The valve automatically adjusts its opening degree based on the temperature feedback signal, creating a closed-loop control system that optimizes energy efficiency while maintaining required cooling performance.
2Productivity
If the flow control valve opens fully to ensure sufficient chilled water supply, then cooling capacity is maintained, but the system cannot reduce flow to minimize energy consumption
Solution Approach 1:
The flow control valve transitions from a static fully-open state to a dynamic adjustable state. The valve opening degree is continuously adjusted based on temperature feedback, allowing the system to maintain sufficient cooling capacity when needed while reducing flow rate when cooling demand is low, thereby eliminating the need to operate at maximum flow continuously.
Solution Approach 2:
The patent changes the flow rate parameter of chilled water based on temperature conditions. By adjusting the valve opening degree according to temperature feedback, the system varies the flow rate parameter dynamically - increasing it when cooling capacity is required and decreasing it when energy conservation is prioritized, thus resolving the contradiction between productivity and energy loss.
3Device complexity
If the system uses a simple on/off control method with triple valve, then the control structure remains simple, but the system cannot precisely control chilled water flow to reduce energy waste
Solution Approach 1:
The patent introduces feedback control by adding a temperature sensor that continuously monitors chilled air temperature and feeds this information back to the flow control valve. This enables precise automatic adjustment of the valve opening degree based on actual temperature conditions, significantly improving energy efficiency while maintaining relatively simple control structure through automatic control.
Solution Approach 2:
The flow control valve is designed with self-service capability through automatic temperature-sensing and feedback mechanisms. The valve automatically adjusts its own opening degree based on temperature feedback without requiring manual intervention or complex external control systems, achieving precise flow control with minimal added 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
This solution effectively reduces the flow of chilled water, thereby decreasing energy loss and achieving significant energy savings by optimizing the chilled water loop's operation.
Implementation Method 1
temperature sensing flow control valve to control chilled water circulation
Implementation Method 2
a large amount of chilled water still flows in the chilled water loop and simultaneously absorb heat during the flowing process
Data Source
AI summary
An energy saving system utilizing temperature sensing flow control valve to realizing chilled water loop is provided, which includes an air blower, a temperature sensing flow control valve and a temperature setter. The air blower is disposed in the chilled water loop of a building to chill the air by the chilled water loop and then discharge the chilled air from the air outlet of the air blower. The valve is connected to a chilled water outlet beside the air blower and controls the flow of the chilled water flowing from the air blower to the chilled water loop. The temperature setter is connected to the valve and detects the temperature of the air discharged from the air outlet; the temperature setter opens or closes the temperature sensing flow control valve according to the detected air temperature and adjusts the flow of the chilled water by the valve.