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Electrical heat tracing: international harmonization-now and in the future
Electrical heat tracing: international harmonization-now and in the future
C. Sandberg
Tyco Thermal Controls
N.R. Rafferty – M. Kleinehanding – J.J. Hernandez
E.I. DuPont de Nemours & Company, Inc
Abstract: In the past, electrical heat tracing has been thought of as a minor addition to plant utilities. Today, it is recognized as a critical subsystem to be monitored and controlled. A marriage between process, mechanical, and electrical engineers must take place to ensure that optimum economic results are produced. The Internet, expert systems, and falling costs of instrumentation will all contribute to more reliable control systems and improved monitoring systems. There is a harmonization between Europe and North America that should facilitate design and installation using common components. The future holds many opportunities to optimize the design.
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Outdoor Deicing & Snow Melting
“Snow at Argenteuil” | Claude Monet (1875)
Today our focus turns to outdoor electric deicing and snow melting wiring systems identified as suitable for the environment and installed in accordance with the manufacturer’s instructions. They work silently to keep snow load from caving in roofs and icicles falling from gutters onto pedestrian pathways.
While the voltage and ampere requirement of the product itself is a known characteristic, the characteristic 0f the wiring pathway — voltage, ampere, grounding, short circuit, disconnect and control — is relatively more complicated and worthy of our attention. Articles 426-427 of the National Electrical Code is the relevant part of the NEC
Free Access 2023 National Electrical Code
Insight into the ideas running through technical committee deliberations is provided by a review of Panel 17 transcripts:
2023 NEC Panel 17 Public Input Report (633 pages)
2023 NEC Panel 17 Public Comment Report (190 pages)
We hold Articles 427 in the middle of our priority ranking for the 2023 NEC. We find that the more difficult issues for this technology is the determination of which trade specifies these systems — architectural, electrical, or mechanical; covered in previous posts. Instead, most of our time will be spent getting IEEE consensus products in step with it, specifically ANSI/IEEE 515 and IEEE 844/CSA 293.
Comments on the Second Draft of the 2026 NEC will be received until April 18th.
…
We collaborate with the IEEE Education & Healthcare Facility Committee which meets online 4 times per month in European and American time zones. Since a great deal of the technical basis for the NEC originates with the IEEE we will also collaborate with IEEE Standards Coordinating Committee 18 whose members are charged by the IEEE Standards Association to coordinate NFPA and IEEE consensus products.
Issue: [19-151]
Category: Electrical, Energy
Colleagues: Mike Anthony, Jim Harvey, Kane Howard, Jose Meijer
LEARN MORE:
CFRU 93.3FM
Student radio stations are learning platforms for aspiring broadcasters and media professionals. They offer practical training and hands-on experience in radio production, programming, and broadcasting. Many educational institutions with student radio stations integrate these stations into their curriculum, providing students with the opportunity to apply theoretical knowledge in a real-world broadcasting setting.
Standards Ontario | Financial Position 2023 (-$35,047,000) Page 19
Canadian Parliament Debate on Standards Incorporated by Reference
Maxwell equations: A complete description of electromagnetism and light
University of Alberta: The evolution of elite hockey culture in Canada
Stirling’s Coffee House
https://www.stirlingvenues.com/visiting-us/eating-drinking
Data Center Product Standards
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Microgrids
We were doing microgrids before microgrids were cool. We did not call our school boiler plants or campus district energy systems “microgrids” until the EPACT flooded the electrical power industry with a new cadre of policy makers, regulators and litigators and we were forced into a vocabulary upgrade.
National Electrical Code Article 705 Interconnected Power Sources: Second Draft Transcript
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We resume our engagement (and advocacy) for a few concepts which have tracked in the NFPA and IEEE standards development catalogs since the early 1990’s:
- Nudge development of the National Electrical Code to recognize that loss of electrical power presents (i.e. reliability, availability) a greater hazard, and more frequent hazard, than wiring fire hazard.
- The application of stand-alone AC to DC inverters in the 100 – 1000 watt range to convert DC power from an automobile to households. A portable vehicle to home 120 VAC outlet strip is effectively a “microgrid” and costs less than $100 not including the extension cords.
- Expansion of the hybrid vehicle fittings with a built-in inverter to provide power to households in the 1000-2000 watt range. In contemporary parlance this arrangement is now referred to as “vehicle to home” (different than vehicle to grid)
- Relaxation of NEC prohibitions against the sharing of residential backup generators and electric storage equipment between two or more separate houses. This can reduce cost significantly. Earthing, ground fault, disconnect, overcurrent protection can easily be solved if the vertical incumbents we describe in our ABOUT stop voting against us in the National Electrical Code
- Stepping up the backup power systems that maintain the needed power for neighborhood internet access. Not all students and faculty live on campus.
- Policy makers and regulators should think in terms of setting standards for 10-day, 30-day and 90-day survivability contingencies to limit civil unrest.
- Preservation of contingencies with a judicious combination of absorption and electric chillers no matter what the electric rate. During a major regional contingency power is priceless.
- Promote a “cultural change” among specifiers and university design guideline writers to permit use of aluminum wiring which cost 1/3 less than copper wiring. Use of aluminum wiring for backup “swing feeders” at medium voltage reduces the cost of an additional contingency by 2/3rds.
- Reduce National Electrical Code circuit sizing rules so that distribution transformers within buildings can be reduced, thereby reducing material, heat waste and the reduction of wet-stacking in backup generators which reduces reliability.
This should be enough for an hour. We continue the conversation 4 times monthly with the IEEE Education & Healthcare Facilities Committee. Feel free to join us today with the login credentials at the upper right of our home page.
University of Delaware Vehicle to Grid Research
P2030.12/D1.4, Jun 2022 – IEEE Draft Guide for the Design of Microgrid Protection Systems
A Review on Microgrids’ Challenges & Perspectives
Long-term experience of DC-microgrid operation
Hierarchical Network Management of Industrial DC-Microgrids
— Electrical Knowledge (@electric_4u) July 11, 2024
Mark your calendar for the Microgrid Knowledge Conference session, “Benefits of an Off-grid Microgrid-enabled Community”. This panel will describe the residential site, microgrid, fit to the city’s sustainability goals, and benefits & challenges of going off-grid. Register now! pic.twitter.com/hsAKrERIkj
— MicrogridNews (@MicrogridNews) January 15, 2025
Grid-Connected Microgrid Battery Energy Storage Systems
Overview of Technical Specifications for Grid-Connected Microgrid Battery Energy Storage Systems
A. Rahman Khalid, et. al
Abstract: Increasing distributed topology design implementations, uncertainties due to solar photovoltaic systems generation intermittencies, and decreasing battery costs, have shifted the direction towards integration of battery energy storage systems (BESSs) with photovoltaic systems to form renewable microgrids (MGs). Specific benefits include, but are not limited to, seamless switching and islanding operations during outages and ancillary grid services. The evolution of battery chemistries and other components has also further enhanced practicality; however, developing these multifaceted MGs involves complexity in the design process. Consequently, stakeholders rely on connection standards and operational requirements to guarantee reliable and safe grid-connected operations.
This paper presents a technical overview of battery system architecture variations, benchmark requirements, integration challenges, guidelines for BESS design and interconnection, grid codes and standards, power conversion topologies, and operational grid services. In addition, a comprehensive review of the control strategies for battery equalization, energy management systems, communication, control of multiple BESSs, as well as a discussion on protection blinding and intentional islanding using BESSs is also provided. Finally, a discussion of the islanded and black start operation results for time-based analysis and standard validation of a 3MW/9MWh BESS in a grid-connected MG at the Florida International University (FIU) Engineering Campus is presented.
Accreditation 100
“I have no special talent.
I am only passionately curious”
— Albert Einstein
Early 20th-century fresco depicting guilds in the 13th-century New Tower of Sélestat
Standards are the seed corn for compliance revenue; hence the hegemony of conformance and enforcement enterprises that dominate the global standards system.
Accreditation is a relatively recent breakout topic so we approach it gently; respectful of the business models of the hundreds of education community charitable associations involved in the safety and sustainability of the physical spaces of education communities.
Accreditation 100 tracks facility management credentialing:
Ferris State University | Certificate Program in Facility Management
University of San Diego | Facilities Management Program
Arizona State University | Facility Management Certificate Program
Later in 2024 we will sort through other issues in the credentialing domain:
Accreditation 200: Recent innovations in credentialing
Q. There are about 150 hospitals in the USA with the word “university” in their name. Are they tax-exempt? Should they be? A. Whether a hospital with “university” in its name is tax-exempt depends on various factors, including its ownership, structure, and purpose. Non-profit hospitals, including those affiliated with universities, may qualify for tax-exempt status under certain conditions. However, the mere presence of “university” in the name does not automatically confer tax-exempt status. Tax-exempt status, the hospital’s activities, such as providing charity care, medical education, and research, are typically considered.
Accreditation 300: Requirements for baccalaureate, masters and doctoral degrees
Accreditation 400: Advanced Topics
Open to everyone. Use the login credentials at the top of our home page.
Breaking: Florida lawmakers approve a certification for classical educators
Florida just keeps winning. https://t.co/C0zpDHUedv
— Jeremy Wayne Tate (@JeremyTate41) March 13, 2024
Readings:
New update alert! The 2022 update to the Trademark Assignment Dataset is now available online. Find 1.29 million trademark assignments, involving 2.28 million unique trademark properties issued by the USPTO between March 1952 and January 2023: https://t.co/njrDAbSpwB pic.twitter.com/GkAXrHoQ9T
— USPTO (@uspto) July 13, 2023
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