Modular Cooling Unit Layout to Prevent Data Center Air Mixing
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Solution Overview
Problem
Traditional data center cooling systems, such as CRAC units, are inefficient due to the mixing of hot and cold air, and they require complex piping that can lead to leaks and equipment damage, making it undesirable to secure coolant piping to the ceiling, thus limiting cooling efficiency and increasing energy consumption.
Innovation Solution
A modular, self-contained cooling unit with a compressor, condenser, evaporator, and variable speed fans, which senses and controls air and coolant flow to optimize cooling capacity by measuring parameters like temperature and pressure, allowing for localized cooling and reducing the need for overhead piping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If CRAC units are used to cool data centers, then cooling coverage can be achieved, but cooling efficiency deteriorates due to mixing of hot and cold air
Solution Approach 1:
The invention divides the data center cooling into multiple independent cooling zones, each served by a separate cooling unit positioned at specific locations. This segmentation prevents hot and cold air mixing by providing localized cooling rather than one centralized system, directly addressing the efficiency loss from air mixing while maintaining adequate cooling coverage.
2Ease of operation
If overhead piping is installed for coolant delivery, then coolant can be delivered to CRAC units, but system reliability deteriorates due to piping joint failure risks
Solution Approach 1:
The invention extracts and eliminates the overhead piping system entirely by using self-contained cooling units with integrated refrigerant circuits. Each cooling unit operates independently with its own sealed refrigerant loop, removing the vulnerable piping joints from the system and thereby eliminating the reliability issues associated with overhead coolant delivery infrastructure.
3Productivity
If more rack-mounted equipment is added to racks, then equipment capacity increases, but heat generation increases causing thermal problems
Solution Approach 1:
The invention applies local quality by positioning cooling units at specific locations within the data center to address localized heat generation from dense equipment racks. Each cooling unit is tailored to serve its specific zone, providing targeted cooling capacity that matches the local heat load, thereby enabling higher equipment density without thermal problems.
4Use of energy by stationary object
If CRAC units discharge cold air into the data center room, then cooling is provided, but energy efficiency deteriorates due to mixing with room temperature air
Solution Approach 1:
The cooling units provide self-service cooling directly at the equipment racks by drawing in hot exhaust air and cooling it locally before returning it to the cold aisle. This self-contained approach eliminates the need to discharge cold air into the general room environment where it would mix with warm air, thereby maintaining energy efficiency while achieving precise temperature control.
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 enhances cooling efficiency by minimizing air mixing, reducing energy consumption, and eliminating the risks associated with overhead piping, while allowing for flexible deployment and scalability to meet changing data center needs.
Implementation Method 1
a compressor to provide coolant under pressure
Implementation Method 2
a condenser in fluid communication with the compressor, and an evaporator in fluid communication with the condenser and the compressor
Data Source
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AI summary
A method of calculating net sensible cooling capacity of a cooling unit (10) includes measuring a discharge pressure from of fluid from a compressor (30) and a suction pressure from an evaporator (44), calculating a condensing temperature of fluid flowing from the compressor and an evaporating temperature of fluid flowing from the evaporator, calculating a mass flow rate of fluid flowing from the compressor, calculating enthalpy of fluid flowing from the compressor, of fluid flowing from the thermal expansion valve (48), and of fluid flowing from the evaporator, calculating a mass flow rate of fluid flowing through the hot gas bypass valve (64), and calculating net sensible cooling capacity. Embodiments of cooling units and other methods are further disclosed.