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Engineering


All Variable Speed Chiller Plants and Systems

October, 2009
District Energy magazine
How High Can You Go? New approaches for cooling system efficiency (pdf)
July 15,2008
HPAC Engineering
Ultraefficient All-Variable-Speed Chilled-Water Plants
May 1, 2007
HPAC Engineering
Real Efficiencies of Central Plants
May, 2002
Automated Buildings
Optimizing All-Variable Speed Systems With Demand Based Control
August, 2002
HPAC Engineering
Out With the Old, In With the New (pdf)
September, 2001
ASHRAE Journal
All-Variable Speed Centrifugal Chiller Plants, Tom Hartman (pdf)
December, 2001
HPAC Engineering
Ultra Efficient Cooling with Demand Based Control, Tom Hartman (pdf)
January, 2000
HPAC Engineering
Chiller-Plant Control Utilizing Gateway Technologies (pdf)
October 16, 2000
Green Building Workshop and Conference APEC Taipei, Taiwan
Network Based Control: An Imperative for Green Office Buildings, Tom Hartman (pdf)
April 12, 1999
ASME International Conference, Lahaina, Hawaii
“LOOP” Chiller Plant Dramatically Lowers Chilled Water Costs (pdf)

The Equal Marginal Performance Principle

July, 2005
ASHRAE Journal
Designing Efficient Systems With the Equal Marginal Performance Principle, Tom Hartman (pdf)
July, 2005
ASHRAE Journal
What is the Equal Marginal Performance Principle?

Relational Control

May, 2006
Automated Buildings
What’s Relational Control?
March, 2006
Automated Buildings
New Vistas with Relational Control Part I
April, 2006
Automated Buildings
New Vistas with Relational Control Part II
May, 2006
Automated Buildings
New Vistas with Relational Control Part III
October, 2005
HPAC Engineering
Relational Control (pdf)
September, 2003
HPAC Engineering
Presenting Intelligent Iterative Control: PID Replacement for Set point Control (part 1), Tom Hartman (pdf)
October, 2003
HPAC Engineering
Presenting Intelligent Iterative Control: PID Replacement for Set point Control (part 2), Tom Hartman (pdf)
November, 2003
HPAC Engineering
Presenting Intelligent Iterative Control: PID Replacement for Set point Control (part 3), Tom Hartman (pdf)


Performance Issues & Case Studies

June 16, 2009
Journal of Green Building
The Aventine Chiller Plant Optimization (pdf)
November, 2008
HPAC Engineering
Ultra Efficient All Variable Speed Buildings
May, 2007
HPAC Engineering
Actual wire-to-water efficiencies of six common central-plant types (pdf)
March, 2006
HPAC Engineering
Ultraefficient all variable speed central plant (pdf)
July 1, 2006
Thermal Storage ES Magazine
Night Shift – Thermal Storage ES Magazine

Performance Based Building Design and Operations

January, 2008
The Hartman Company
Vision for Energy Performance Based Building Design and Operations (pdf)
February, 2008
Automated Buildings
What is Performance Based Building Design and Operations?
April, 2007
Automated Buildings
What Does it Really Take to be an Intelligent Building
June, 2007
Automated Buildings
Making Energy Efficiency Accountable
August, 2006
Automated Buildings
Can ASHRAE Reinvent Itself?
August, 2005
Engineered Systems
What’s The Role For Advanced Technologies In Green Building Design?
March, 2004
Automated Buildings
Perfect We Ain't But Becoming Better is Surprisingly Easy
September, 2004
Automated Buildings
Growing a Greener Engineering Profession
October, 2003
Automated Buildings
Ending the Blackout Blues
November, 2003
Automated Buildings
Applying Advanced Technology Products and Services to Projects The Process is the Problem!
December, 2003
Automated Buildings
Design Team Communications: Keeping a Perspective on Personalities

Related Topics

November, 2006
HPAC Engineering
HPAC Engineering Grows Editorial Advisory Board (pdf)
June, 2003
ASHRAE Journal
Improving VAV Zone Control, Tom Hartman (pdf)
Fall/Winter 2003
Automated Buildings
Strengthening The Weak Links To Higher Performing Buildings
April, 2002
Automated Buildings
All-Variable Speed Chilled Water Distribution Systems: Optimizing Distribution Efficiency
July, 2002
HPAC Engineering
PID Control: May It Rest in Peace, Tom Hartman (pdf)
January, 2000
Automated Buildings
HVAC Control: An Essay On Change
October, 2000
APEC Green Building Workshop and Conference: Network Based Control, Taipei, Taiwan
Network Based Control: An Imperative for Green Buildings (pdf)
November, 1998
HPAC Engineering
Packaging DDC Networks With Variable Speed Drive (pdf)

Business Related
March, 2009
AutomatedBuildings.com interview with Gary Gigot & Ken Sinclair
Gary Gigot & Ken Sinclair
February 11, 2009
Podcast: Optimum Energy President Nathan Rothman on HVAC and energy efficiency
September, 2008
Automatedbuildings.com interview with Jim Hanna
Jim Hanna & Ken Sinclair
May 5, 2008
National Real Estate Investor interview with Nathan Rothman
Q&A With Optimum Energy’s Nathan Rothman
January 30, 2007
Energy Priorities Interview
Denis Dubois from Energy Priorities web site interviews Optimum’s Jim Hanna
 Optimum

© 2009 Optimum Energy LLC