ASHRAE Journal - December 2019 - 117
HEAT PIPES IN DATA CENTERS
p to 40% of the total consumed
in a data center power is due to
cooling server rooms down to a
suitable temperature year-round. Passive
energy recovery heat pipes can play a
major role in reducing power consumption enabling data centers to run at peak
efficiency. HPT's Heat pipe energy
recovery modules (HRMs) provide a
passive cooling effect to reduce loads and
downsize the mechanical cooling system
in indirect cooling applications, whether
chilled water or direct expansion.
Heat Recovery (Rejection) Modules
They consist of copper tubes, aluminum
fins, and a working fluid that changes
phase passively to move heat. As air
passes over the warm side (hot air aisle
from data center return air) of the heat
pipe, see diagram, the refrigerant vaporizes, absorbing energy, then travels to the
cold side (outside air) where it condenses,
releasing energy, then flows back to the
warm side. This process occurs as long as
outside air is cooler than data center air.
This enables data center cooling without
introducing outside air to the server room
space to outside air to the server room
space to avoid equipment contamination. Additional cooling can be provided by evaporative cooling of the
outside air upstream of the heat pipe
when outside air temperature exceeds
that of the data center. Mechanical
cooling does the rest, as needed.
Advantages of Using HPT Heat Pipes
in Data Centers:
* Passive heat rejection to the outsideNO electrical load.
* Reduction of the load on CRAC
systems or other A/C units
* Isolated air streams-ZERO contamination
of the data center by outside air
* No moisture added to space, better
humidity control
* RELIABLE - No moving parts to fail
* Small footprint, less space taken
* New or existing system retrofits
* No added power, reduction of PUE
* Many refrigerant circuits provide
added REDUNDANCY
http://datacenterheatpipes.com/
ASHRAE Journal - December 2019
Table of Contents for the Digital Edition of ASHRAE Journal - December 2019
Contents
ASHRAE Journal - December 2019 - Intro
ASHRAE Journal - December 2019 - CT1
ASHRAE Journal - December 2019 - CT2
ASHRAE Journal - December 2019 - Cover1
ASHRAE Journal - December 2019 - Cover2
ASHRAE Journal - December 2019 - 1
ASHRAE Journal - December 2019 - Contents
ASHRAE Journal - December 2019 - 3
ASHRAE Journal - December 2019 - 4
ASHRAE Journal - December 2019 - 5
ASHRAE Journal - December 2019 - 6
ASHRAE Journal - December 2019 - 7
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ASHRAE Journal - December 2019 - Cover3
ASHRAE Journal - December 2019 - Cover4
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