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Reliability Analysis for Power to Fire Pumps

Reliability Analysis for Power to Fire Pump Using Fault Tree and RBD

Robert Schuerger | HP Critical Facilities (Project Lead, Corresponding Author)

Robert Arno | ITT Excelis Information Systems

Neal Dowling | MTechnology

Michael A. Anthony | University of Michigan

Abstract: One of the most common questions in the early stages of designing a new facility is whether the normal utility supply to a fire pump is reliable enough to “tap ahead of the main” or whether the fire pump supply is so unreliable that it must have an emergency power source, typically an on-site generator. Apart from the obligation to meet life safety objectives, it is not uncommon that capital on the order of 100000to1 million is at stake for a fire pump backup source. Until now, that decision has only been answered with intuition – using a combination of utility outage history and anecdotes about what has worked before. There are processes for making the decision about whether a facility needs a second source of power using quantitative analysis. Fault tree analysis and reliability block diagram are two quantitative methods used in reliability engineering for assessing risk. This paper will use a simple one line for the power to a fire pump to show how each of these techniques can be used to calculate the reliability of electric power to a fire pump. This paper will also discuss the strengths and weakness of the two methods. The hope is that these methods will begin tracking in the National Fire Protection Association documents that deal with fire pump power sources and can be used as another tool to inform design engineers and authorities having jurisdiction about public safety and property protection. These methods will enlighten decisions about the relative cost of risk control with quantitative information about the incremental cost of additional 9’s of operational availability.

CLICK HERE to order complete paper

Excellence in Facilities Management

Best Coffee Spots Near Campus

“The coffee-house is an original British institution, but as there are daily effusions of wit and humor

in several of these little periodical papers, I think we may be justly said

to have our Coffee-houses among us.”

(From “The Spectator,” No. 9, March 10, 1711)

Ellie Younger: Best Coffee Spots Near Campus

Artisanal coffee departs from mass-market approaches and replaces it with emphasis on craftsmanship, quality, and attention to detail throughout the entire process—from cultivation to brewing. Key aspects:

» Artisanal coffee producers often prioritize high-quality beans. They might focus on specific varieties, regions, or even single-origin beans, showcasing unique flavors and characteristics.

» The roasting process is considered an art in itself. Artisanal coffee roasters carefully roast the beans to bring out the best flavors. They may experiment with different roasting profiles to achieve specific taste profiles.

» Unlike mass-produced coffee, artisanal coffee is often roasted in smaller batches. This allows for better quality control and the ability to pay closer attention to the nuances of each batch.

» Artisanal coffee is appreciated for its distinct flavor profile. Roasters and baristas might highlight tasting notes, aromas, and other characteristics that make each cup unique.

» Artisanal coffee shops or enthusiasts often explore various brewing methods, such as pour-over, AeroPress, or siphon brewing. These methods can be more time-consuming but are believed to extract the best flavors from the beans.

From the way the beans are ground to the water temperature during brewing, artisanal coffee enthusiasts pay attention to every detail to ensure a superior cup of coffee.

— Publisher Marketing

The Decline of Men in Colleges

The Great Good Place: Ray Oldenburg

“I have often pleased myself with considering the two different scenes of life which are carried on at the same time in those different places of rendezvous, and putting those of the playhouse and the coffee-house together.”

(From “The Spectator,” No. 10, March 12, 1711)

America’s Cultural Revolution: How the Radical Left Conquered Everything

“For decades, left-wing radicals patiently built a revolution in the shadows. Then suddenly, after the death of George Floyd, their ideas exploded into American life.

Corporations denounced the United States as a “system of white supremacy.” Universities pushed racially segregated programs that forced students to address their racial and sexual “privilege.” And schools injected critical race theory in the classroom, dividing children into “oppressor” and “oppressed.”

In this New York Times bestseller, Christopher F. Rufo exposes the inner history of the left-wing intellectuals and militants who slowly and methodically captured America’s institutions, with the goal of subverting them from within. With profiles of Herbert Marcuse, Angela Davis, Paulo Freire, and Derrick Bell, Rufo shows how activists have profoundly influenced American culture with an insidious mix of Marxism and racialist ideology. They’ve replaced “equality” with “equity,” subverted individual rights in favor of group identity, and convinced millions of Americans that racism is endemic in all of society. Their ultimate goal? To replace the constitution with a race-based redistribution regime, administered by “diversity and inclusion” commissars within the bureaucracy.

America’s Cultural Revolution is the definitive account of the radical Left’s long march through the institutions. Through deep historical research, Rufo shows how the ideas first formulated in the pamphlets of the Weather Underground, Black Panther Party, and Black Liberation Army have been sanitized and adopted as the official ideology of America’s prestige institutions, from the Ivy League universities to the boardrooms of Wal-Mart, Disney, and Bank of America. But his book is not just an exposé. It is a meticulously-researched and passionate refutation of the arguments of CRT—and a roadmap for the counter-revolution to come.”

— Manhattan Institute

“To be at home is to have a place in the world which is yours, where you are not a stranger and where you find the outlines of your identity. In the modern world, however, where the sense of home has been eroded by technology and bureaucracy, architecture can create a substitute for this sense, by defining spaces which answer to the dreams and memories of the people who live in them.”
— Roger Scruton

Excellence in Facilities Management

Chapel Construction Timelapse

Michigan Building Codes

Sacred Spaces

Rightsizing Electrical Power Systems

Standards Michigan, spun-off in 2016 from the original University of Michigan Business & Finance Operation, has peppered NFPA 70 technical committees writing the 2016-2026 National Electric Code with proposals to reduce the size of building premise feeder infrastructure; accommodating the improvements made in illumination and rotating machinery energy conservation since the 1980’s (variable frequency drives, LED lighting, controls, etc.)

These proposals are routinely voted down in 12-20 member committees representing manufacturers (primarily) though local inspection authorities are complicit in overbuilding electric services because they “bill by the service panel ampere rating”. In other words, when a municipality can charge a higher inspection fee for a 1200 ampere panel, what incentive is there to support changes to the NEC that takes that inspection fee down to 400 amperes?

The energy conservation that would result from the acceptance of our proposals into the NEC are related to the following: reduced step down transformer sizes, reduced wire and conduit sizes, reduced panelboard sizes, reduced electric room cooling systems — including the HVAC cooling systems and the ceiling plenum sheet metal carrying the waste heat away. Up to 20 percent energy savings is in play here and all the experts around the table know it. So much for the economic footprint of the largest non-residential building construction market in the United States — about $120 billion annually.

The market incumbents are complicit in ignoring energy conservation opportunity. To paraphrase one of Mike Anthony’s colleagues representing electrical equipment manufacturers:

“You’re right Mike, but I am getting paid to vote against you.”

NFPA Electrical Division knows it, too.

University of Michigan

Rightsizing Commercial Electrical Power Systems: Review of a New Exception in NEC Section 220.12

Michael A. Anthony – James R. Harvey

University of Michigan, Ann Arbor

Thomas L. Harman

University of Houston, Clear Lake, Texas

For decades, application of National Electrical Code (NEC) rules for sizing services, feeders and branch circuits has resulted in unused capacity in almost all occupancy classes. US Department of Energy data compiled in 1999 indicates average load on building transformers between 10 and 25 percent. More recent data gathered by the educational facilities industry has verified this claim. Recognizing that aggressive energy codes are driving energy consumption lower, and that larger than necessary transformers create larger than necessary flash hazard, the 2014 NEC will provide an exception in Section 220.12 that will permit designers to reduce transformer kVA ratings and all related components of the power delivery system. This is a conservative, incremental step in the direction of reduced load density that is limited to lighting systems. More study of feeder and branch circuit loading is necessary to inform discussion about circuit design methods in future revisions of the NEC.

CLICK HERE for complete paper

University of Houston

2026 National Electrical Code Workspace

Food Safety

Overdoor, France, ca. 1825; | Smithsonian Design Museum

Education communities have significant food safety responsibilities. Risk gets pushed around global food service counterparties; a drama in itself and one that requires coverage in a separate blog post.*

Since 2013 we have been following the development of food safety standards; among them ANSI/NSF 2: Food Equipment one of a constellation of NSF food safety titles whose provisions cover bakery, cafeteria, kitchen, and pantry units and other food handling and processing equipment such as tables and components, counters, hoods, shelves, and sinks. The purpose of this Standard is to establish minimum food protection and sanitation requirements for the materials, design, fabrication, construction, and performance of food handling and processing equipment.

It is a relatively stable standard; developed to support conformance revenue for products. A new landing page seems to have emerged in recent months:

https://www.nsf.org/testing/food

You may be enlightened by the concepts running through this standard as can be seen on a past, pre-pandemic agenda:

NSF 2 Food Safety 2019 Meeting Packet – Final Draft

NSF 2 Food Safety 2019 Meeting Summary – August 21-22 Ann Arbor NSF Headquarters

NSF 2 Food Equipment Fabrication Agenda – FEF – TG – 2021-01-12

Not trivial agendas with concepts that cut across several disciplines involving product manufacture, installation, operation and maintenance. We find a very strong influence of organizations such as Aramark and Sodexo. More on that in a separate post.

Ranchview High School Cafeteria / Irving, Texas

This committee – along with several other joint committees –meets frequently online. If you wish to participate, and receive access to documents that explain the scope and scale of NSF food safety standards, please contact Allan Rose, (734) 827-3817, arose@nsf.org. NSF International welcomes guests/observers to nearly all of its standards-setting technical committees. We expect another online meeting hosted by this committee any day now.

Keep in mind that all NSF International titles are on the standing agenda of our Nourriture (Food) colloquia; open to everyone. See our CALENDAR for the next meeting.

University of Indiana

Issue: [13-113] [15-126]

Category: Facility Asset Management, Healthcare, Residence Hall, Athletics

Colleagues: Mike Anthony, Tracey Artley, Keith Koster, Richard Robben

*See “Food Safety Risk Management: Evidence-Informed Policies and Decisions, Considering Multiple Factors, Food and Agriculture Organization of the United Nations”

LEARN MORE:

ANSI Blog | Changes to NSF 2 Food Safety Equipment Standard

NSF International Food Safety 2018 Meeting Summary – 2018-08-22 – Final Draft

2017 Food Code | US Food & Drug Administration

Hygiene Requirements For The Design Of Meat And Poultry Processing Equipment

ARCHIVE: NSF 2 Food Safety

Solar Panel Recycling

Institute of Electrical and Electronic Engineers:

The value of diversity in the renewable energy industry and research community

Comparing the carbon footprint of monocrystalline silicon solar modules manufactured in China and the United States

Material Requirement and Resource Availability for Silicon Photovoltaic Laminate Manufacturing in the Next 10 Years

Life cycle assessment of transparent organic photovoltaic for window applications

Evaluating the Electricity Production and Energy Saving from Transparent Photovoltaics for Windows in Commercial Buildings

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Michigan Upper Peninsula | Michigan West | Michigan East

Michigan State University Infrastructure Planning & Facilities

Standard For Towers And Antenna Supporting Structures

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Audio Standards

Requirements for Hybrid Media Production

Trowel Trades

Bricklayers, sometimes known as masons, are skilled craftsmen that must be physically fit, have a high level of mathematical skill and a love for precision and detail.

Bricklaying standards are guidelines and specifications that ensure the quality and safety of bricklaying work. These standards are often established by industry organizations, regulatory bodies, or national building codes. While specific standards may vary by region, some core bricklaying standards include:

Building Codes: Compliance with local building codes is essential. These codes provide regulations for construction practices, including specifications for masonry work. Bricklayers must adhere to the building codes relevant to the specific location of the construction project.

ASTM International Standards: ASTM International (formerly known as the American Society for Testing and Materials) develops and publishes technical standards for various industries, including construction. ASTM standards related to bricklaying cover materials, testing procedures, and construction practices.

Masonry Construction Standards: Organizations like the Masonry Standards Joint Committee (MSJC) in the United States publish standards specifically focused on masonry construction. These standards address topics such as mortar, grout, reinforcement, and structural design considerations.

Quality Control: Standards related to quality control in bricklaying include specifications for mortar mixtures, proper curing of masonry, and guidelines for inspecting finished work. Adherence to these standards helps ensure the durability and longevity of the masonry construction.

Safety Standards: Occupational safety standards, such as those outlined by the Occupational Safety and Health Administration (OSHA) in the United States, are critical for protecting workers on construction sites. These standards cover aspects like fall protection, scaffolding safety, and the proper use of personal protective equipment.

Brick and Block Standards: Standards related to the dimensions, composition, and properties of bricks and concrete blocks are important for achieving structural integrity. These standards specify characteristics such as compressive strength, absorption, and dimensional tolerances.

Construction Tolerances: Tolerances dictate acceptable variations in dimensions and alignments in bricklaying work. These standards help ensure that the finished structure meets design specifications and industry-accepted tolerances.

Testing and Inspection: Standards related to the testing and inspection of masonry work help verify that construction meets specified requirements. This includes procedures for mortar testing, grout testing, and overall quality inspections.

It’s important for bricklayers and construction professionals to be aware of and follow these standards to guarantee the safety, quality, and compliance of their work. Additionally, staying informed about updates to industry standards is crucial as they may evolve over time to reflect advancements in materials, techniques, and safety practices.

St. Olaf College | Dakota County Minnesota

International Building Code Chapter 21: Masonry

Tag Archives: Michigan

Reliability Analysis for Power to Fire Pumps

Excellence in Facilities Management

Best Coffee Spots Near Campus

Chapel Construction Timelapse

Rightsizing Electrical Power Systems

Food Safety

Solar Panel Recycling

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LIVE: Student Radio FM 88.3

Trowel Trades

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