City Hall Gets an Overhaul

Integrating Lighting and HVAC Retrofits: Case Study

10/15/2010


Main Story                                                Case Study 1                                              Case Study 2


Constructed in the late 1920s, Columbus City Hall represents the art deco style that was very prominent throughout that era. While the building still has the original charm and character that it did when it was first built, the HVAC and lighting systems have aged significantly and are in need of an upgrade. The existing HVAC system is a hodgepodge of different systems that have been added and modified over the years.

The existing HVAC equipment will be removed and replaced with a new four-pipe fan coil system supplemented with dedicated outdoor air units (DOAU) to provide proper ventilation. The four-pipe fan coil system can prove to be 10% to 15% more efficient than a traditional variable air volume (VAV) system because the need for reheat has been eliminated and the DOAU can provide the minimum amount of outdoor air required. With a traditional VAV system, there is a tendency to over-ventilate a space because of the need to calculate outdoor air requirements based on the critical space method.

The majority of existing lighting at city hall consists of T12 fluorescent and incandescent lamps in a variety of fixture types that appear very dated. There are several historic pendants in many of the main hallways that use screw-in incandescent candelabras. Many of these historic luminaires have been retrofitted with replacement screw-in fluorescents, which have taken away from the historic look. These fixtures are being removed, shipped to a custom luminaire manufacturer, refurbished and cleaned, and then fit-out with LED light sources consistent to the original incandescent look. This will reduce the luminaires’ energy consumption by nearly 80% from their original incandescent versions and by more than 30% of their retrofit compact fluorescents.

The T12 parabolic and lensed troffers will be replaced with T5 volumetric type luminaires and T8 lensed troffers in the majority of spaces. It is anticipated that the new luminaires will be able to produce the same light levels that currently exist while reducing consumption by up to 30%. Changing from T12 to T5 luminaires will result in approximately a $1/sq-ft savings annually. There is more than 90,000 sq-ft of space being renovated at city hall, resulting in a $90,000 savings. This number does not take into account additional savings that will be witnessed by occupancy sensor and time of day control automatic lighting control.

A major culprit of energy consumption at city hall is the exterior floor lights, 400 and 1000 W metal halide drum-style flood lights that consume 460 and 1080 W, respectively. The total exterior consumption is 36,960 W. These are being replaced by LED wall washers and flood lights that consume a mere 30 W each. The total wattage of the new LED system that is capable of producing any color in the spectrum as called for by the city of Columbus for special events is 4160 W. This is a reduction of 89% and can yield a payback of less than seven years, even with the significant investment for color-changing LEDs upfront. It currently costs the city approximately $26/night to run the metal halides; this number will be reduced to $3/night, based on an 8-hour night at $0.09 per kWh.

With these lighting and HVAC changes, the city hall renovation is in the process of pursuing U.S. Green Building Council LEED Certification.

 


Return to:

Integrating Lighting and HVAC Retrofits: Main Story

Integrating Lighting and HVAC Retrofits: Complex Office Building Retrofit (Case Study)

 

 



The Top Plant program honors outstanding manufacturing facilities in North America. View the 2015 Top Plant.
The Product of the Year program recognizes products newly released in the manufacturing industries.
Each year, a panel of Control Engineering and Plant Engineering editors and industry expert judges select the System Integrator of the Year Award winners in three categories.
A new approach to the Skills Gap; Community colleges may hold the key for manufacturing; 2017 Engineering Leaders Under 40
Doubling down on digital manufacturing; Data driving predictive maintenance; Electric motors and generators; Rewarding operational improvement
2017 Lubrication Guide; Software tools; Microgrids and energy strategies; Use robots effectively
The cloud, mobility, and remote operations; SCADA and contextual mobility; Custom UPS empowering a secure pipeline
Infrastructure for natural gas expansion; Artificial lift methods; Disruptive technology and fugitive gas emissions
Mobility as the means to offshore innovation; Preventing another Deepwater Horizon; ROVs as subsea robots; SCADA and the radio spectrum
Power system design for high-performance buildings; mitigating arc flash hazards
Research team developing Tesla coil designs; Implementing wireless process sensing
Commissioning electrical systems; Designing emergency and standby generator systems; Paralleling switchgear generator systems

Annual Salary Survey

Before the calendar turned, 2016 already had the makings of a pivotal year for manufacturing, and for the world.

There were the big events for the year, including the United States as Partner Country at Hannover Messe in April and the 2016 International Manufacturing Technology Show in Chicago in September. There's also the matter of the U.S. presidential elections in November, which promise to shape policy in manufacturing for years to come.

But the year started with global economic turmoil, as a slowdown in Chinese manufacturing triggered a worldwide stock hiccup that sent values plummeting. The continued plunge in world oil prices has resulted in a slowdown in exploration and, by extension, the manufacture of exploration equipment.

Read more: 2015 Salary Survey

Maintenance and reliability tips and best practices from the maintenance and reliability coaches at Allied Reliability Group.
The One Voice for Manufacturing blog reports on federal public policy issues impacting the manufacturing sector. One Voice is a joint effort by the National Tooling and Machining...
The Society for Maintenance and Reliability Professionals an organization devoted...
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
Maintenance is not optional in manufacturing. It’s a profit center, driving productivity and uptime while reducing overall repair costs.
The Lachance on CMMS blog is about current maintenance topics. Blogger Paul Lachance is president and chief technology officer for Smartware Group.
The maintenance journey has been a long, slow trek for most manufacturers and has gone from preventive maintenance to predictive maintenance.
Featured articles highlight technologies that enable the Industrial Internet of Things, IIoT-related products and strategies to get data more easily to the user.
This digital report will explore several aspects of how IIoT will transform manufacturing in the coming years.
Maintenance Manager; California Oils Corp.
Associate, Electrical Engineering; Wood Harbinger
Control Systems Engineer; Robert Bosch Corp.
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