In the blogs at csemag.com

David Sellers, PE, senior engineer with the Portland, Ore., office of Facility Dynamics and CSE’s “A Field Guide for Engineers” blogger continues his detailed analysis of energy use in engineered building systems. “In my previous post,” said Sellers, “I mentioned that using an electric resistance coil to generate a Btu of heat can be expensive relative to bu...

10/01/2007


David Sellers, PE, senior engineer with the Portland, Ore., office of Facility Dynamics and CSE ’s “A Field Guide for Engineers” blogger continues his detailed analysis of energy use in engineered building systems.

“In my previous post,” said Sellers, “I mentioned that using an electric resistance coil to generate a Btu of heat can be expensive relative to burning a fossil fuel on-site for the same purpose because of the difference between site and source energy.”

If one only considers energy crossing the site boundary and the conversion efficiency of the electric heating coil, electric resistance heat seems like a the right choice. “So, why wouldn’t you want to use electric resistance heat and what makes it so expensive?” asked Sellers. “The answer to that question lies in the difference between site energy and source energy.”

Sellers also has posted two parts of a series he titles, “Art, Craft, and Engineering” that discusses the “art and craft and struggle and passion” of developing HVAC control sequences.

“When I first started to design, dealing with the realities that a design day imposed upon the system I was contemplating was all consuming,” said Sellers. “When it finally occurred to me that the design day represented only a tiny fraction of the operating reality my systems would have to deal with, I saw things from a new perspective; i.e. I had a new insight.”

Read Sellers’ entire blog and comment at www.csemag.com .





No comments
Consulting-Specifying Engineer's Product of the Year (POY) contest is the premier award for new products in the HVAC, fire, electrical, and...
Consulting-Specifying Engineer magazine is dedicated to encouraging and recognizing the most talented young individuals...
The MEP Giants program lists the top mechanical, electrical, plumbing, and fire protection engineering firms in the United States.
integrated building networks, NFPA 99, recover waste heat, chilled water systems, Internet of Things, BAS controls
40 Under 40; Performance-based design; Clean agent fire suppression; NFPA 92; Future of commissioning; Successful project management principles
BIM coordination; MEP projects; NFPA 13; Data center Q&A; Networked lighting controls; 2017 Product of the Year finalists
Transformers; Electrical system design; Selecting and sizing transformers; Grounded and ungrounded system design, Paralleling generator systems
Commissioning electrical systems; Designing emergency and standby generator systems; VFDs in high-performance buildings
Tying a microgrid to the smart grid; Paralleling generator systems; Previewing NEC 2017 changes
As brand protection manager for Eaton’s Electrical Sector, Tom Grace oversees counterfeit awareness...
Amara Rozgus is chief editor and content manager of Consulting-Specifier Engineer magazine.
IEEE power industry experts bring their combined experience in the electrical power industry...
Michael Heinsdorf, P.E., LEED AP, CDT is an Engineering Specification Writer at ARCOM MasterSpec.
Automation Engineer; Wood Group
System Integrator; Cross Integrated Systems Group
Fire & Life Safety Engineer; Technip USA Inc.
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
click me