Patent Application
20230293921
The invention relates generally fire suppression systems, and more particularly, to a low noise nozzle assembly for use with a fire suppression system.
Data centers are generally used to store and distribute valuable information across many industries. Industry demands that these data centers remain continuously functional. Downtime can damage the reputation of a data center and result in the loss of customers. Information handled by data centers is primarily stored on magnetic Hard Disk Drives (HDDs). These hardware devices have a known sensitivity to sound, that is, sound pressure can cause vibration-induced damage or disruptions to an HDD. Unfortunately, inert gas fire suppression systems typically used to protect the server rooms that house this type of equipment in a data center, utilize nozzles that can produce sound levels which may have an adverse effect on this noise sensitive hardware. Some common nozzles generate noise levels in excess of 130 dB, which creates an unacceptable risk of lost operation time for a data center.
Aspects of the disclosure relate to low noise nozzle assembly for fire suppression systems.
In some embodiments, a nozzle assembly for a fire suppression system comprises a body having an inlet end for receiving a flow of fire extinguishing agent from the fire suppression system at an inlet pressure a nozzle portion extending from the body and having an interior cavity; and a conical central body located in the interior cavity, extending upstream from a base of the nozzle portion, wherein a plurality of exit orifices are formed in an outer wall of the nozzle portion, in communication with the interior cavity, for vectoring the flow of fire extinguishing agent exiting therefrom.
In some embodiments, nozzle portion has a cylindrical outer wall, and wherein the exit orifices are defined in the cylindrical outer wall of the nozzle portion.
In some embodiments, the exit orifices formed in the cylindrical outer wall of the nozzle portion are oriented at an angle that is perpendicular to the cylindrical outer wall of the nozzle portion.
In some embodiments, the inlet end of the body portion is axially aligned with the nozzle portion along a central axis thereof.
In some embodiments, the exit orifices formed in the cylindrical outer wall of the nozzle portion are oriented at an angle that is perpendicular to the central axis of the nozzle portion.
In some embodiments, the nozzle assembly comprises at least one perforated filter member positioned upstream from the exit orifices formed in the nozzle portion, the perforated filter member configured for reducing the inlet pressure of the fire extinguishing agent.
In some embodiments, the at least one perforated filter member is formed from a perforated metal plate.
In some embodiments, the at least one perforated filter member is a cylindrical perforated filter member that is coaxially positioned within the cylindrical nozzle portion.
In some embodiments, the at least one perforated filter member includes a plurality of perforated filter members positioned within the interior cavity of the nozzle portion in spaced apart relationship along a central axis thereof.
In some embodiments, each of the plurality of perforated filter members has the same porosity.
In some embodiments, each of the plurality of perforated filter members has a different porosity.
In some embodiments, the plurality of perforated filter members decreases in porosity in a downstream direction along the central axis of the nozzle portion.
In some embodiments, a porous metal foam insert is positioned upstream from the at least one perforated filter member.
In some embodiments, a plurality of porous metal foam inserts are positioned upstream from each perforated filter member.
In some embodiments, the inlet end of the body portion includes a metering orifice.
In some embodiments, the exit orifices formed in the cylindrical outer wall of the nozzle portion vary in diameter along the central axis of the nozzle portion in a downstream direction.
In some embodiments, nozzle assembly for a fire suppression system comprises a body having an inlet end for receiving a flow of fire extinguishing agent from the fire suppression system at an inlet pressure; a nozzle portion axially aligned with the inlet end of the body along a central axis thereof; and a conical central body located in the interior cavity, extending upstream from a base of the nozzle portion, wherein a plurality of exit orifices are formed in a cylindrical outer wall of the nozzle portion for vectoring the flow of fire extinguishing agent exiting therefrom, wherein a cross-sectional area of the nozzle portion at any axial point along the central axis thereof is equal to a total open area of the exit orifices formed in the cylindrical outer wall of the nozzle portion downstream from that axial point.
In some embodiments, at least one perforated filter member is positioned upstream from the exit orifices formed in the nozzle portion, for reducing the inlet pressure of the fire extinguishing agent.
In some embodiments, a porous metal foam insert is positioned upstream from the at least one perforated filter member.
In some embodiments, a metering orifice is positioned upstream from the at least one perforated filter member.
Various other aspects, features, and advantages of the invention will be apparent through the detailed description of the invention and the drawings attached hereto. It is also to be understood that both the foregoing general description and the following detailed description are examples and not restrictive of the scope of the invention.
In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It will be appreciated, however, by those having skill in the art that the embodiments of the invention may be practiced without these specific details or with an equivalent arrangement. In other cases, well-known structures and devices are shown in block diagram form in order to avoid unnecessarily obscuring the embodiments of the invention.
The present disclosure is related to U.S. Non-Provisional patent application Ser. No. 17/264,145, filed 1 Aug. 2019 which claims the benefit of U.S. Provisional Patent Application US 62/713,609, filed 2 Aug. 2018. The entire content of each of these applications is incorporated by reference in its entirety.
The present disclosure, in accordance with some embodiments, is directed to a new and useful nozzle assembly for a fire suppression system that does not generate sound levels that are high enough to have an adverse effect on magnetic HDDs. The nozzle assembly includes a body having an inlet end for receiving a flow of fire extinguishing agent from the fire suppression system at an entrance velocity and inlet pressure. In some embodiments, the nozzle assembly may include a cylindric outer wall and a conical center body located inside a cavity of the nozzle assembly. The cylindric shape of the nozzle assembly and the conical center body may help maintain uniform pressure within the nozzle assembly and may produce lower noise levels that would protect data centers without risk of lost operation time.
In some embodiments, interior cavity 26 may include a conical central body 27. In some embodiments, conical central body 27 extends along line X-X from a base 29 of nozzle portion 24 in upstream direction Us. In some embodiments, conical central body 27 may be configured to distribute the flow of fire suppressant radially in an approximatively horizontal direction as shown in
In some embodiments, conical central body 27 may be configured to extend in the upstream direction between about a quarter of nozzle portion 24 and highest point of exit orifices 28. In some embodiments, conical central body 27 may extend upstream to about location of highest exit orifices. In some embodiments, conical central body 27 may be made from a metal similar to the metal of the nozzle portion 24. In some embodiments, conical central body 27 may be a hollow, partially filled, or solid structure. In some embodiments, conical central body 27, may be configured to connect to base 29 of nozzle portion 24. In some embodiments, conical central body 27, may be configured to connect to one or more inner sides of the nozzle portion 24.
In some embodiments, the exit orifices 28 defined in the cylindrical outer wall 25 of the nozzle portion 24 may be oriented at an angle relative to the axial plane X-X. For example, in some embodiments, the exit orifices 28 may be oriented at an angle that is perpendicular to the central axis X-X of the nozzle portion 24 so as to control fluid vectoring in an approximately horizontal manner. Alternatively, the exit orifices 28 can be oriented at other angles so as to control fluid vectoring in another preferred manner, which would depend upon the configuration of the area to be protected by the nozzle assembly 20. In some embodiments, exit orifices 28 in the outer wall 25 could all be oriented at the same angle or they could be oriented at different angles relative to the axial plane X-X of the nozzle portion 24.
It is also envisioned that the exit orifices 28 in the cylindrical outer wall 25 of the nozzle portion 24 could vary in diameter and/or in number along the central axis X-X of the nozzle portion 24. For example, the upstream exit orifices 28 can have a diameter “D” while the downstream exit orifices 28 can have a smaller diameter “d”. Those skilled in the art will readily appreciate that the frequency of the noise generated by the nozzle assembly 20 will increase as the exit orifices 28 decrease in size. Accordingly, the diameter of the exit orifices 28 should be sized so as to minimize the overall acoustic signature of the nozzle assembly 20, while maintaining a preferred coverage volume of about 100 m3.
Furthermore, the nozzle portion 24 is preferably dimensioned and configured so that the cross-sectional area thereof at any point along the central axis X-X is equal to the total open area of the exit orifices 28 formed in the conical outer wall 25 of the nozzle portion 24 downstream from that point. Consequently, the static pressure within the interior cavity 26 of the nozzle portion 24 will be maintained at a level that will ensure that fire extinguishing agent is uniformly fed to all of the exit orifices 28 for the entire duration of the discharge, which could range from 60 seconds to 120 seconds.
In some embodiments, a perforated filter member 30 (shown in
Returning to
In some embodiments, a porous metal foam insert could be associated with an upstream side of each of the perforated filter members 30a, 30b, and 30c to further reduce the inlet pressure of the fire suppressant. More particularly, a porous metal foam insert 40a would be associated with an upstream side of perforated filter member 30a, a porous metal foam insert 40b would be associated with an upstream side of the perforated filter member 30b, and a porous metal foam insert 40c would be associated with an upstream side of the perforated filter member 30c. In some embodiments, the porous metal foam inserts are about 0.5 inches in thickness. In some embodiments, when used alone or in combination with one another, these porous components may function to reduce the pressure while evenly distributing the flow throughout the internal cross-sectional area, and reducing the noise associated with flow turbulence. In some embodiments, when the porous components/perforated metal foam are used just downstream of a metering orifice, they may function to effectively reduce the noise associated with supersonic flow by dissipating the shock formed downstream of the metering orifice.
While the perforated filter members 30a, 30b, and 30c preferably have the same porosity, it is envisioned that each of a plurality of perforated filter members could have a different porosity. For example, in such an embodiment, the perforated filter members 30a, 30b, and 30c would decrease in porosity in a downstream direction Ds along the axis X-X of the interior cavity 26 so as to gradually or otherwise progressively reduce the flow velocity of the fire suppression agent in a stepwise or multi-staged manner. For example, in some embodiments, the upstream filter member 30a could be a perforated metal plate having a porosity of about 40%. In some embodiments, filter member 30b could be a perforated metal plate having a porosity of about 30%. In some embodiments, embodiments, filter member 30b could be a perforated metal plate having a porosity of about 20%. It is also envisioned that in some embodiments, the porosity of the filter members 30a, 30b, and 30c may be the same.
It should be understood that the description and the drawings are not intended to limit the invention to the particular form disclosed, but to the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present invention as defined by the appended claims. Further modifications and alternative embodiments of various aspects of the invention will be apparent to those skilled in the art in view of this description. Accordingly, this description and the drawings are to be construed as illustrative only and are for the purpose of teaching those skilled in the art the general manner of carrying out the invention. It is to be understood that the forms of the invention shown and described herein are to be taken as examples of embodiments. Elements and materials may be substituted for those illustrated and described herein, parts and processes may be reversed or omitted, and certain features of the invention may be utilized independently, all as would be apparent to one skilled in the art after having the benefit of this description of the invention. Changes may be made in the elements described herein without departing from the spirit and scope of the invention as described in the following claims. Headings used herein are for organizational purposes only and are not meant to be used to limit the scope of the description.
As used throughout this application, the word “may” is used in a permissive sense (i.e., meaning having the potential to), rather than the mandatory sense (i.e., meaning must). The words “include”, “including”, and “includes” and the like mean including, but not limited to. As used throughout this application, the singular forms “a,” “an,” and “the” include plural referents unless the content explicitly indicates otherwise. Thus, for example, reference to “an element” or “a element” includes a combination of two or more elements, notwithstanding use of other terms and phrases for one or more elements, such as “one or more.” The term “or” is, unless indicated otherwise, non-exclusive, i.e., encompassing both “and” and “or.” Terms describing conditional relationships, e.g., “in response to X, Y,” “upon X, Y,”, “if X, Y,” “when X, Y,” and the like, encompass causal relationships in which the antecedent is a necessary causal condition, the antecedent is a sufficient causal condition, or the antecedent is a contributory causal condition of the consequent, e.g., “state X occurs upon condition Y obtaining” is generic to “X occurs solely upon Y” and “X occurs upon Y and Z.” Such conditional relationships are not limited to consequences that instantly follow the antecedent obtaining, as some consequences may be delayed, and in conditional statements, antecedents are connected to their consequents, e.g., the antecedent is relevant to the likelihood of the consequent occurring. Further, unless otherwise indicated, statements that one value or action is “based on” another condition or value encompass both instances in which the condition or value is the sole factor and instances in which the condition or value is one factor among a plurality of factors. Unless otherwise indicated, statements that “each” instance of some collection have some property should not be read to exclude cases where some otherwise identical or similar members of a larger collection do not have the property, i.e., each does not necessarily mean each and every. Unless specifically stated otherwise, as apparent from the discussion, it is appreciated that throughout this specification discussions utilizing terms such as “processing,” “computing,” “calculating,” “determining” or the like refer to actions or processes of a specific apparatus, such as a special purpose computer or a similar special purpose electronic processing/computing device.
The application claims the benefit of U.S. Provisional Application No. 63/269,639 filed Mar. 21, 2022, the contents of which are hereby incorporated in their entirety.
| Number | Date | Country | |
|---|---|---|---|
| 63269639 | Mar 2022 | US |
