Seasonal Equipment Beats Permanent's Payback

What began as a one-time summer rental is moving into its sixth season. In 1996, Toyota Motor Manufacturing in Georgetown, Ky., began renting chillers to maintain its assembly plant at 79°F. Five air-cooled chillers with a total 1,500 tons of capacity took the heat and humidity out of the ambient summer air.

06/01/2001


What began as a one-time summer rental is moving into its sixth season. In 1996, Toyota Motor Manufacturing in Georgetown, Ky., began renting chillers to maintain its assembly plant at 79°F. Five air-cooled chillers with a total 1,500 tons of capacity took the heat and humidity out of the ambient summer air.

Eventually plant managers undertook an analysis, the results of which showed that using the rental chillers for peak summer loads was more cost-effective than adding to the 25,000-ton permanent water-cooled chiller capacity.

With 7,800 team members working on two shifts five days per week, "we performed load calculations using the most current weather patterns, and determined that we would need an additional 2,500 tons of chiller capacity," says Gary Van Corp, a mechanical specialist for Toyota. "By using air-cooled rental chillers, we eliminated the need for adding cooling-water piping connections and temporary containment areas for a water-cooled system."

For three years, the company rented seven 2,500-ton chillers. Then, Toyota added 2,000 tons of permanent chiller capacity, but still rented five 300-ton-capacity units in 1999 and 2000. The annual rental period runs from mid-June through August, the time of peak summer power loads.

From Pure Power, Summer 2001.





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.
Combined heat and power; Assessing replacement of electrical systems; Energy codes and lighting; Salary Survey; Fan efficiency
Commissioning lighting control systems; 2016 Commissioning Giants; Design high-efficiency hot water systems for hospitals; Evaluating condensation and condensate
Solving HVAC challenges; Thermal comfort criteria; Liquid-immersion cooling; Specifying VRF systems; 2016 Product of the Year winners
Driving motor efficiency; Preventing Arc Flash in mission critical facilities; Integrating alternative power and existing electrical systems
Putting COPS into context; Designing medium-voltage electrical systems; Planning and designing resilient, efficient data centers; The nine steps of designing generator fuel systems
Designing generator systems; Using online commissioning tools; Selective coordination best practices
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.
click me