Modular Hot Aisle Cooling Units for Hybrid Data Center Cooling
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Solution Overview
Problem
Colocation data centers face challenges in achieving flexible space utilization and energy efficiency due to the preference for closed systems that require mechanical refrigeration, leading to high energy usage and installation costs, while climate-specific data centers can utilize direct evaporative cooling with outside air, providing an advantage.
Innovation Solution
A modular hot aisle cooling unit (MHACU) system combined with a fluid cooler and pump package forms a single fluid loop, utilizing ambient environmental conditions and minimal mechanical refrigeration to achieve efficient cooling, with a hybrid cooler system that blends direct evaporative and mechanical cooling methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If closed systems with mechanical refrigeration are used, then cooling reliability is improved, but energy consumption increases
Solution Approach 1:
The system dynamically switches between different cooling modes (economizer mode using outside air, fluid cooler mode using liquid cooling, and mechanical refrigeration mode) based on environmental conditions and thermal load requirements, optimizing energy consumption while maintaining cooling reliability
Solution Approach 2:
A fluid cooler using liquid coolant serves as an intermediary between the servers and the ambient environment, enabling more efficient heat transfer compared to direct air cooling, thereby reducing energy consumption while maintaining reliable cooling
2Use of energy by moving object
If direct evaporative cooling with outside air is used, then energy consumption is reduced, but cooling control precision deteriorates
Solution Approach 1:
The system incorporates sensors and control mechanisms that continuously monitor temperature and humidity levels, adjusting the cooling strategy in real-time to maintain precise temperature control while optimizing energy consumption through evaporative cooling and mechanical cooling transitions
3Ease of manufacture
If closed systems are used, then installation cost is reduced, but water usage increases
Solution Approach 1:
The system recovers and reuses cooling water through a closed-loop fluid cooling system, minimizing water consumption while maintaining the simplicity and cost-effectiveness of a closed architecture
4Temperature
If mechanical refrigeration is used, then cooling performance is improved, but installation cost increases
Solution Approach 1:
The system dynamically selects between mechanical refrigeration, fluid cooling, and evaporative cooling modes based on environmental conditions and thermal load, achieving high cooling performance when needed while reducing installation costs by using simpler cooling methods when sufficient
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 reduces water usage by up to 90% and energy consumption, while maintaining temperature control within ASHRAE standards, offering flexibility and efficiency comparable to direct evaporative cooling systems.
Implementation Method 1
a fluid cooler configured to receive the heated fluid from the one or more MHACUs, cool the heated fluid into cooled fluid, and output the cooled fluid
Implementation Method 2
utilizing ambient environmental conditions and minimal mechanical refrigeration to achieve efficient cooling, with a hybrid cooler system that blends direct evaporative and mechanical cooling methods
Implementation Method 3
air flows through the first coil and then through the second coil
Data Source
AI summary
A system includes one or more modular hot aisle cooling units (MHACUs) disposed in a data hall, each MHACU configured to cool one or more servers in the data hall. The system also includes a fluid cooler configured to receive the heated fluid from the one or more MHACUs, cool the heated fluid into cooled fluid, and output the cooled fluid. The system also includes a fluid supply line configured to convey the cooled fluid to the one or more MHACUs in order to cool heated air inside the data hall. The system also includes a pump package configured to control a flow of the heated fluid and the cooled fluid. The fluid cooler, the one or more MHACUs, and the pump package form a single fluid loop.