Closed-Loop Evaporator Cooling for High-Power Electronics
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Solution Overview
Problem
The increasing power dissipation in integrated circuit chips poses a cooling challenge for electronics systems, as traditional air-cooling methods become inadequate at the system level, especially in high-power modules and data centers, where increased airflow rates and powerful air-moving devices are not feasible due to cost and environmental constraints.
Innovation Solution
A vapor-compression heat exchange system is integrated into the electronics system, creating a closed loop airflow path that utilizes a refrigerant-based evaporator and condenser to cool air circulating through the system, allowing for efficient heat transfer and temperature regulation, even in non-clean room environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If increased air flow rates are used to cool high power modules, then cooling effectiveness is improved, but the temperature of exhaust air increases and cost increases
Solution Approach 1:
A heat exchanger is introduced as an intermediary component between the electronics system and the environment. The heat exchanger transfers heat from the exhaust air to a coolant (such as water or refrigerant), allowing the exhaust air to be cooled before being discharged or recirculated. This mediator enables effective heat removal without directly heating the environment with hot exhaust air.
Solution Approach 2:
The system changes the thermal parameters of the exhaust air by using a heat exchanger to transfer heat energy from the hot exhaust air to a coolant medium. This parameter change (temperature reduction) allows the exhaust air to be discharged at lower temperatures or recirculated back into the system, improving overall thermal efficiency.
2Power
If more powerful air moving devices are used to handle increased power dissipation, then cooling capacity is improved, but device complexity and cost increase
Solution Approach 1:
Instead of relying solely on more powerful air moving devices, a heat exchanger is introduced as an intermediary thermal management component. This heat exchanger works in conjunction with the existing air moving devices to provide additional cooling capacity through heat transfer to a coolant, thereby increasing overall cooling capacity without proportionally increasing the complexity of the air moving devices themselves.
3Ease of operation
If traditional air-cooling methods are used in non-clean room environments, then ease of operation is improved, but cooling effectiveness deteriorates
Solution Approach 1:
A heat exchanger is introduced as an intermediary component that enables effective cooling in non-clean room environments. The heat exchanger transfers heat from the air to a coolant, providing reliable thermal management without requiring controlled clean room conditions. This maintains ease of operation in various environments while significantly improving cooling effectiveness.
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 cools electronics subsystems by circulating refrigerant through an evaporator and condenser, reducing air temperatures and enabling efficient heat rejection, thus addressing the cooling challenges faced by high-power modules and data centers, while being adaptable for use in smaller businesses without the need for a clean room environment.
Implementation Method 1
a vapor-compression heat exchange system, wherein the vapor-compression heat exchange system includes an evaporator and a condenser
Implementation Method 2
an evaporator disposed in the evaporator housing, wherein the evaporator includes a refrigerant inlet and a refrigerant outlet
Implementation Method 3
a condenser disposed in the condenser housing, wherein the condenser includes a refrigerant inlet and a refrigerant outlet
Data Source
AI summary
Apparatus and method are provided for facilitating air-cooling of an electronics system employing a vapor-compression heat exchange system, and front and back covers. An evaporator housing of the heat exchange system is mounted to a system housing of the electronics system and extends at least partially between air inlet and outlet sides of the system housing. The evaporator housing includes air inlet and outlet openings, and an evaporator. The front cover is mounted to the system or evaporator housing adjacent to the air inlet side or air outlet opening, and the back cover is mounted to the system or evaporator housing adjacent to the air outlet side or air inlet opening. Together, the system housing, back cover, evaporator housing and front cover define a closed loop airflow path passing through the system housing and evaporator housing, with the vapor-compression heat exchange system cooling air circulating therethrough.