Climate Control Fluid Pressure Calibration for Terminal Unit Efficiency
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Solution Overview
Problem
Existing climate control systems commission with conservatively high fluid pressures to ensure terminal unit performance, leading to excessive energy consumption and unnecessary wear on system components like pumps.
Innovation Solution
A method to adjust fluid pressure in climate control systems by determining the range of terminal unit efficiencies over varying pressures, identifying a selected pressure where combined and bottom terminal unit efficiencies meet specific thresholds, thereby optimizing fluid pressure without compromising efficiency or increasing wear on components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high fluid pressure is selected during commissioning, then terminal unit performance is ensured, but energy consumption increases and wear on system components occurs
Solution Approach 1:
The system dynamically adjusts fluid pressure parameters based on actual terminal unit performance requirements rather than maintaining a fixed high pressure setting. The controller monitors terminal unit efficiencies and modifies pressure levels accordingly, transitioning from static conservative pressure selection to dynamic parameter optimization.
Solution Approach 2:
The commissioning process incorporates feedback mechanisms where terminal unit efficiencies are measured and used to adjust fluid pressure settings. The controller receives performance data from terminal units and uses this feedback to optimize pressure levels, ensuring minimum efficiency requirements are met without excessive pressure.
2Reliability
If high fluid pressure is selected during commissioning, then terminal unit performance is ensured, but wear on system components increases
Solution Approach 1:
The system changes the pressure parameter from consistently high to dynamically adjusted levels based on actual performance needs. By reducing pressure to the minimum necessary level while maintaining terminal unit efficiency requirements, the mechanical stress on pumps and other fluid loop components is reduced, extending their operational lifespan.
Solution Approach 2:
Instead of applying excessive pressure to all terminal units at all times, the system applies partial pressure adjustments tailored to actual performance requirements. The pressure is increased only to the extent necessary to meet terminal unit efficiency thresholds, avoiding unnecessary stress on system components.
3Use of energy by moving object
If automated pressure selection is implemented, then energy efficiency improves, but system complexity increases
Solution Approach 1:
The system performs self-adjustment of fluid pressure through automated controller logic that monitors terminal unit efficiencies and modifies pressure settings without requiring external intervention. The commissioning process is self-regulating, using built-in sensors and control algorithms to optimize pressure levels based on real-time performance data.
Solution Approach 2:
The manual mechanical commissioning process is replaced with an automated electronic control system. Instead of manual pressure adjustments and measurements, the system uses electronic sensors, controllers, and algorithms to automatically determine and adjust optimal pressure settings, reducing the need for manual intervention and mechanical adjustment mechanisms.
Data Source
AI summary
A method for selecting a fluid pressure of a fluid supplied to a plurality of terminal units in a climate control system includes adjusting the fluid pressure over a range over fluid pressures; determining a terminal unit efficiency for each terminal unit over the range of fluid pressures; determining a range of combined terminal unit efficiencies over the range of fluid pressures; identifying a range of bottom terminal unit efficiencies over the range of fluid pressures; and selecting a selected fluid pressure at which (i) a combined terminal unit efficiency is within a first threshold of a combined terminal unit efficiency limit and/or (ii) a bottom terminal unit efficiency is within a second threshold of a bottom terminal unit efficiency limit.