US10123463B2 — Liquid submerged, horizontal computer server rack and systems and method of cooling such a server rack (Part 2 of 2)
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Research, not advice. Part of the Bitcoin research archive (October 2026). Claims labelled unverified, contested or fringe are reported, not endorsed; statuses of bills and rules are as of the date checked. Government, court and patent records are public domain; the research notes are CC BY 4.0.
the at least one pump is operated to move the at least one tank ; and
dielectric liquid coolant vertically across the heat pro a multi-circuit fluid cooling apparatus,
ducing components on the vertically oriented mother wherein , when the vertically oriented rack -mountable
boards, a circuit is formed in which a first portion of 10
dielectric liquid coolant is moved vertically upward servers are mountably received in at least one row in
across the heat producing components on the vertically the at least one tank , at least a portion of at least two of
oriented motherboards and then downward outside of the vertically oriented rack -mountable servers being
the rack mountable servers in the at least one passage , mountably received is held in the at least one tank such
while a second portion of the dielectric liquid coolant 15 that at least two of the vertically oriented rack -mount
flows out of the tank , able servers can be commonly at least partially sub
wherein the secondary cooling apparatus is configured to merged in a volume of the dielectric liquid coolant in
reject, by way of the remote heat exchanger , heat the at least one tank for cooling the vertically oriented
transferred from the second portion of the dielectric rack -mountable servers ,
liquid coolant . 20 wherein , when the vertically oriented rack -mountable
23 . The apparatus of claim 22 , wherein , when the plurality servers are mountably received in the at least one tank
of rack -mountable servers are mountably received , at least and commonly at least partially submerged in the
one of the vertically oriented rack -mountable servers is volume of dielectric liquid coolant in the at least one
completely submerged within the dielectric liquid coolant tank , the plurality of vertically oriented rack -mountable
such that a volume of dielectric liquid coolant collects in a 25 servers are thermally coupled to a remote heat
common manifold area above the at least one vertically exchanger outside of the server room via the multi
oriented rack -mountable server to improve the circulation of circuit fluid cooling apparatus , wherein the multiple
the liquid coolant through the vertically oriented rack circuit fluid cooling apparatus comprises:
mountable servers , thereby enhancing the cooling of the a dielectric liquid cooling apparatus;
vertically oriented rack -mountable server. 30
a secondary cooling apparatus comprising a remote
24 . The apparatus of claim 22 , wherein the at least one heat exchanger ; and
tank comprises an open or openable top , wherein the verti a liquid -to -liquid or liquid -to -refrigerant heat
cally oriented rack -mountable servers are mountable such exchanger;
that at least one of the vertically oriented rack -mountable wherein the dielectric liquid cooling apparatus including
servers can be removed from the tank through the open or 35
openable top while at least two of the other vertically one or more pumps, and a plurality of fluid velocity
oriented rack -mountable servers remain commonly at least augmentation devices in the volume of dielectric liquid
partially submersed in the dielectric liquid coolant and coolant in the at least one tank , wherein at least one of
dielectric liquid coolant continues to flow across the at least the pumps , the coolant inlet, the coolant outlet, and the
two other vertically oriented rack -mountable servers. 40 mountingmembers are configured such that the at least
25 . An apparatus for cooling a plurality of rack -mountable one pump moves at least a portion of the dielectric
servers containing heat generating electronic components in liquid coolant in the volume of dielectric liquid coolant
a server room , the cooling apparatus comprising: vertically across heat producing components on the
at least one tank defining an open interior volume and vertically oriented motherboard of one of the vertically
having a coolant inlet for receiving a dielectric liquid 45 oriented rack -mountable servers in parallel flow with
coolant within the open interior volume and having a dielectric liquid coolant moved vertically across heat
coolant outlet for allowing the dielectric liquid coolant producing components on the vertically oriented moth
to flow from the open interior volume, the coolant inlet erboard of at least one other of the vertically oriented
and the coolant outlet being fluidly coupled to each rack -mountable servers ,
other, wherein the at least one tank comprises an open 50 wherein the vertically oriented rack -mountable servers
or openable top sized to receive at least one row are mountable in the at least one tank such that, when
comprising a plurality of rack -mountable servers , each the vertically oriented rack -mountable servers are com
of at least two of the plurality of rack -mountable monly at least partially submerged in the volume of
servers in the at least one row comprising a mother dielectric liquid coolant in the at least one tank and the
board and heat producing components mounted to the 55 dielectric liquid coolant is moved within the at least one
motherboard ; tank , at least one of the vertically oriented rack -mount
one or more mounting members positioned within the able servers is independently vertically removable from
interior volume and configured to mountably receive the volume of dielectric liquid coolant in which the at
the plurality of rack -mountable servers within the inte least two vertically oriented rack -mountable servers are
rior volume, wherein the mounting members are con - 60 commonly at least partially submerged and from the at
figured to hold each of at least two of the rack least one tank through the top of the tank while at least
mountable servers in the at least one row in a two of the other vertically oriented rack -mountable
horizontally stacked relationship with one another, with servers in the at least one row remain commonly at least
the rack -mountable servers in a vertical orientation partially submerged in the volume of dielectric liquid
such that one of the two smallest sides of the rack - 65 coolant in the at least one tank and the dielectric liquid
mountable server faces upward and the motherboard of coolant in the at least one tank continues to flow across
the rack -mountable server is vertically oriented , heat producing electronic components of the at least
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two other vertically oriented rack -mountable servers least a portion of the first fluid circuit between the exits
remaining at least partially commonly submerged in the of the vertically oriented rack -mountable servers and
at least one row , the coolant outlet.
wherein the one or more mounting members are config - 28 . The apparatus of claim 27 , wherein the controller
ured to mountably receive the plurality of vertically 5 provides further instructions for periodically :
oriented rack -mountable servers above the bottom of determining the optimum elevated temperature of the
the at least one tank to form a volume between the heated dielectric liquid coolant as it exits the plurality
plurality of vertically oriented rack -mountable servers of vertically oriented rack -mountable servers in order
and the bottom of the at least one tank in which the for the dielectric liquid coolant to sufficiently cool the
dielectric liquid coolant can collect to permit the flow 10 vertically oriented rack -mountable servers while reduc
of dielectric liquid coolant through the plurality of ing the amount of energy consumed to sufficiently cool
vertically oriented rack -mountable servers, each vertically oriented respective server;
wherein the volume of dielectric liquid coolant comprises determining the amount of energy needed to reject the
at least one passage in the tank that is outside of the 16 absorbed heat for cooling the vertically oriented rack
vertically oriented rack -mountable servers, wherein , mountable servers; and
when the at least one pump is operated to move the in response to the periodic determinations of the optimum
dielectric liquid coolant vertically across the heat pro elevated temperature and the amount of energy needed
ducing components on the vertically oriented mother to reject the absorbed heat, adjusting the amount of heat
boards, a circuit is formed in which a first portion of 20 to be rejected through the remote heat exchanger in
dielectric liquid coolant is moved vertically upward order that the dielectric liquid coolant is maintained at
across the heat producing components on the vertically approximately the optimum elevated temperature in the
oriented motherboards and then downward outside of at least a portion of the circuit between the exits of the
the rack mountable servers in the at least one passage , vertically oriented rack -mountable servers and the
while a second portion of the dielectric liquid coolant 25 coolant outlet.
flows out of the tank and through the liquid - to - liquid or 29 . The apparatus of claim 27, wherein the elevated
liquid - to -refrigerant heat exchanger, temperature is a temperature in the range of 90 degrees F .
wherein the liquid -to -liquid or liquid - to - refrigerant heat and 130 degrees F .
exchanger is configured to transfer heat from the sec 30 . The apparatus of claim 27 , wherein the elevated
ond portion of dielectric liquid coolant in the circuit to 30 temperature is a temperature in the range of 100 degrees F .
liquid or refrigerant moving in the secondary cooling and31110 .
degrees F .
The apparatus of claim 1,
apparatus,
wherein the secondary cooling apparatus is configured to wherein the circuit includes heated dielectric coolant that
reject, by way of the remote heat exchanger, at least z 5 has exited the vertically oriented rack -mountable serv
ers at the top of the at least one row of vertically
part of the heat transferred from the second portion of oriented rack -mountable servers ,
the dielectric liquid coolant wherein one part of the heated dielectric liquid coolant
wherein , when the plurality of rack -mountable servers are that has exited the vertically oriented rack -mountable
mountably received , the plurality of rack -mountable servers at the top of the at least one row of vertically
servers are completely submerged within the dielectric 40 oriented rack -mountable servers recirculates down
liquid coolant such that a volume of dielectric liquid ward in the at least one passage to the bottom of the at
coolant collects in a common manifold area above the least one tank ,
plurality of rack -mountable servers, wherein another part of the heated dielectric liquid cool
wherein one part of the heated dielectric liquid coolant ant that has exited the vertically oriented rack -mount
that has collected in the common manifold area recir- 45 able servers at the top of the at least one row of
culates downward in at least one passage to the bottom vertically oriented rack -mountable servers exits the at
of the at least one tank , and least one tank in the second portion of dielectric liquid
wherein another part of the heat heated dielectric coolant coolant.
that has collected in the common manifold area exits 32 . The apparatus of claim 1,
the at least one tank through the coolant outlet in the 50 wherein heated dielectric liquid coolant exiting the rack
second portion of dielectric liquid coolant. mountable servers collects in a common manifold area
26 . The apparatus of claim 25 , wherein the dielectric above the top of the vertically oriented rack -mountable
liquid coolant flows from the volume between the plurality servers in the at least one row ,
of vertically oriented rack -mountable servers and the at least wherein one part of the heated dielectric liquid coolant
one tank to the common manifold area above the plurality of 55 that has collected in the common manifold area recir
vertically oriented rack -mountable servers. culates downward in at least one passage to the bottom
27 . The apparatus of claim 1, further comprising : of the at least one tank , and
a controller separate from the vertically oriented rack wherein another part of the heat heated dielectric coolant
mountable servers for controlling the cooling appara that has collected in the common manifold area exits
tus, wherein said controller provides instructions for 60 t he at least one tank in the second portion of dielectric
periodically monitoring the temperature of the liquid liquid coolant.
coolant at at least one location within the first fluid 33 . The apparatus of claim 1 ,
circuit ; and wherein the cooling outlet is proximate to surface of the
in response to the periodic determination of the tempera volume of dielectric liquid coolant in the at least one
ture, adjusting the amount ofheat to be rejected through 65 tank , and
the remote heat exchanger such that the dielectric liquid wherein at least a portion of the second portion of
coolant is maintained at an elevated temperature in at dielectric liquid coolant exiting the at least one tank is
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drawn from heated dielectric liquid coolant proximate
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to the surface of the volume of dielectric liquid coolant.