Integration case study: Small retail store

A remodel of a retail building was simulated using an energy modeling program to determine the impact on the HVAC cooling loads.

04/16/2013


A remodel of a 3000-sq-ft retail building was simulated using an energy modeling program to determine the impact on the HVAC cooling loads. For the baseline design (simulating the existing lighting in the space), 75 W halogen track lighting fixtures and 74 W (input power) 2-x4-ft recessed, lay-in T12 lighting fixtures were used. This was compared to the same retail building to be remodeled using energy-efficient lighting fixtures. The energy-efficient versions used were 13 W LED track lighting and 48 W high-performance T8 lighting systems.

When comparing the two simulations for the building cooling requirements, the baseline existing design required 14.5 tons of cooling while the energy efficient remodeled design required only 10.0 tons of cooling. Effectively, the cooling load was reduced by 4.5 tons. While the cooling load was shown to be significantly different, the heating load difference was minimal. Replacing the baseline lighting fixtures with energy-efficient lighting fixtures resulted in a difference of only 0.47 MBh. A small difference such as this would not change the size of the heating option for the HVAC equipment selected.

This case study illustrates that by incorporating an energy-efficient lighting design, not only are there significant energy savings in lighting and HVAC power, but also cost savings in initial equipment purchase and installation.


Justin Schultz is lead electrical engineer at Metro CD Engineering and serves as education chairman and board member for his local Illuminating Engineering Society (IES) section. He is a 2011 Consulting-Specifying Engineer 40 Under 40 award winner and an active member of the USGBC Central Ohio Chapter. Brian Johnson is a mechanical engineer at Metro CD Engineering. He serves as a member of the USGBC Central Ohio Emerging Professionals Group and Advancement Committee as well as the Young Engineers in ASHRAE in Columbus, Ohio.  



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.
Boiler basics; 2017 Product of the Year winners; Manufacturing facilities Q&A; Building integration; Piping and pumping systems
2017 MEP Giants; Mergers and acquisitions report; ASHRAE 62.1; LEED v4 updates and tips; Understanding overcurrent protection
Integrating electrical and HVAC for energy efficiency; Mixed-use buildings; ASHRAE 90.4; Wireless fire alarms assessment and challenges
Power system design for high-performance buildings; mitigating arc flash hazards
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
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