Evaporative Pad Cooling Control for Leak-Free Datacenter Dry Cooling
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Solution Overview
Problem
Conventional dry cooling techniques for datacenters face issues such as high water consumption, inconsistent cooling, temperature fluctuations, dust/contaminant buildup, and the dispersion of pathogenic bacteria due to complex sensor systems and inefficient water application, leading to increased energy and water usage.
Innovation Solution
A datacenter dry cooling system with integrated temperature and humidity sensors and a controller that optimizes the application of evaporative cooling water to evaporating pads, minimizing sensor and hardware components while ensuring 100% evaporation and preventing leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If direct spray evaporative techniques are used to precool ambient air, then cooling efficiency is improved, but water consumption increases and Water Usage Effectiveness decreases
Solution Approach 1:
The system changes the parameters of water application by transitioning from direct spray to evaporative pad application, where water is applied as a thin film rather than droplets. This parameter change allows for more efficient evaporation and reduced water consumption while maintaining cooling effectiveness.
Solution Approach 2:
The evaporative pad acts as a disposable or replaceable medium that absorbs and evaporates water efficiently. The pad material is designed to be consumed or replaced rather than reused, optimizing water usage effectiveness while maintaining consistent cooling performance.
2Temperature
If direct spray evaporative techniques are used, then cooling performance is improved, but pathogenic bacteria dispersion increases
Solution Approach 1:
By using evaporative pads that are designed to be consumed or replaced rather than reused, the system eliminates the risk of bacterial proliferation in reusable spray components. The pad material is selected to be non-porous or easily replaceable, preventing Legionella growth while maintaining cooling effectiveness.
Solution Approach 2:
The system converts the potential harm of water application (bacterial growth) into a benefit by using evaporative pads that promote rapid water evaporation. The rapid evaporation minimizes water residence time on surfaces, thereby preventing bacterial proliferation while maintaining effective cooling.
3Measurement precision
If multiple sensors and control components are implemented, then cooling control precision is improved, but device complexity increases
Solution Approach 1:
The evaporative pad system is designed to self-regulate water evaporation based on ambient conditions without requiring complex sensor arrays. The pad material properties and geometric configuration enable passive adaptation to environmental changes, reducing the need for active control components.
Solution Approach 2:
The system extracts and eliminates unnecessary sensor components by designing a passive evaporative cooling mechanism. By removing the complexity of multiple sensors and control valves, the system achieves sufficient cooling control through the inherent properties of the evaporative pad and simple flow regulation.
4Adaptability or versatility
If not all water is absorbed by evaporating pads, then water application flexibility is improved, but cooling consistency deteriorates and dust buildup increases
Solution Approach 1:
The system optimizes water application parameters by controlling the rate of water delivery to match the evaporation capacity of the pad. By adjusting flow rate parameters rather than relying on pad saturation, the system maintains consistent cooling while allowing flexibility in water application timing and amount.
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 system achieves efficient water usage by reducing the number of sensors and components, virtually eliminating leaks, and maintaining consistent cooling performance, thereby minimizing water consumption and preventing bacterial dispersion.
Implementation Method 1
an evaporating cooling water distribution arrangement for applying cooling water to the evaporating pad
Implementation Method 2
direct spray evaporative techniques to precool the temperature of the ambient air that flows through the heat exchanger system
Implementation Method 3
an air-to-liquid heat exchanger panel
Data Source
AI summary
A datacenter dry cooling system and method for cooling a heat-generating source are provided and directed to maximizing the absorption of cooling water applied to an evaporating pad for evaporation and ambient air cooling while eliminating any leakages. The evaporating pad is disposed on an air-to-liquid heat exchanger panel supplied by an evaporating cooling water distribution arrangement for applying the controlled amount of cooling water to the evaporating pad. The applied cooling water is to be completely evaporated while being exposed to ambient airflow to dissipate the thermal energy of the heat-generating sources. The evaporating pad includes corresponding temperature and/or humidity sensors for detecting temperature/humidity levels at an air outlet surface and a temperature and humidity sensor at an air inlet surface. A controller coupled to the temperature and humidity sensors and evaporating cooling water arrangement controls the cooling water volume flow based on the detected temperature and humidity.