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)

 

 



No comments
The Top Plant program honors outstanding manufacturing facilities in North America. View the 2013 Top Plant.
The Product of the Year program recognizes products newly released in the manufacturing industries.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
The true cost of lubrication: Three keys to consider when evaluating oils; Plant Engineering Lubrication Guide; 11 ways to protect bearing assets; Is lubrication part of your KPIs?
Contract maintenance: 5 ways to keep things humming while keeping an eye on costs; Pneumatic systems; Energy monitoring; The sixth 'S' is safety
Transport your data: Supply chain information critical to operational excellence; High-voltage faults; Portable cooling; Safety automation isn't automatic
Case Study Database

Case Study Database

Get more exposure for your case study by uploading it to the Plant Engineering case study database, where end-users can identify relevant solutions and explore what the experts are doing to effectively implement a variety of technology and productivity related projects.

These case studies provide examples of how knowledgeable solution providers have used technology, processes and people to create effective and successful implementations in real-world situations. Case studies can be completed by filling out a simple online form where you can outline the project title, abstract, and full story in 1500 words or less; upload photos, videos and a logo.

Click here to visit the Case Study Database and upload your case study.

Maintaining low data center PUE; Using eco mode in UPS systems; Commissioning electrical and power systems; Exploring dc power distribution alternatives
Synchronizing industrial Ethernet networks; Selecting protocol conversion gateways; Integrating HMIs with PLCs and PACs
Why manufacturers need to see energy in a different light: Current approaches to energy management yield quick savings, but leave plant managers searching for ways of improving on those early gains.

Annual Salary Survey

Participate in the 2013 Salary Survey

In a year when manufacturing continued to lead the economic rebound, it makes sense that plant manager bonuses rebounded. Plant Engineering’s annual Salary Survey shows both wages and bonuses rose in 2012 after a retreat the year before.

Average salary across all job titles for plant floor management rose 3.5% to $95,446, and bonus compensation jumped to $15,162, a 4.2% increase from the 2010 level and double the 2011 total, which showed a sharp drop in bonus.

2012 Salary Survey Analysis

2012 Salary Survey Results

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.