Engineered Systems - March 2009 - (Page 48)

To save energy and natural resources you need efficiency. Basics For Absorption Chillers Before that you need Maxitrol. “Whether by proper technology integration, increased sophistication or both, the control developments we make here at Maxitrol work together with the more ef cient designs of the end-product. More ef ciency leads to energy savings, which is good for everyone. Customers communicate their need and, when we understand the requirements, we go to work.” Mark Masen Senior Engineer of Research & Development Maxitrol Company The new Exa Valve Series: a 3/8” to 1” modulating valve. High precision, low hysteresis, and custom output characteristics allow for desired process control. ADVANTAGES OF USING ABSORPTION CHILLERS In an energy-efficiency competition, motor-driven vapor compression chillers will beat absorption chillers every time. However, there are specific applications where absorption chillers have a substantial advantage over motor-driven vapor compression chillers. Some of those applications include: • For a facility that has a cogeneration power plant or other thermal energy generating process with excess thermal energy, absorption chillers can utilize this excess thermal energy to produce chilled water instead of all the excess thermal energy being wasted. • For a facility that has inadequate electrical infrastructure or bringing electrical infrastructure to the facility is cost prohibitive, absorption chillers have a substantially lower electrical power requirement than motor driven vapor compression chillers. • For a facility with high electrical power cost and low fuel cost, absorption chillers may have a lower operating cost than motor driven vapor compression chillers. • For a facility that requires substantial system reliability, the lower electrical requirements for absorption chillers will reduce emergency generator load requirements. • For a facility that has high electrical demand charges, absorption chillers can be used as part of a peak shaving strategy. • For a facility that has very low acoustical and/or vibration requirements, absorption chillers have lower noise and vibration generation than motor driven vapor compression chillers. • For a facility wanting to use a “natural refrigerant,” absorption chillers are a good choice. SUMMARY The future for absorption chillers is bright. With power utilities increasing electrical demand charges during peak hours as a strategy to delay building new power generating stations, absorption chillers can be the corner stone for an electrical demand limit strategy. With absorption chillers using “natural refrigerants,” they will become more attractive as more restrictions are placed on HCFC and other refrigerants. With the improved lithium bromide solution concentration control, absorption chillers are more reliable. ES www.maxitrol.com Input 106 at www.esmagazine.com/instantproductinfo Long Lasting Won’t Rust or Corrode Avoid Down Tme Save on Maintenance 15-Year Shell Warranty Not Harmed by H2O Chemical Treatments The Greatest Thing Since a Delta Cooling Tower. Delta Cooling Towers designed the first engineered plastic (polyethylene) cooling tower in 1971. Since then we’ve improved and expanded “The Most Durable Corrosion-Proof Cooling Towers Available” to a full line, factory assembled and ready for any application. Visit us at www.deltacooling.com, or call 1.800.289.3358. Sakraida is a senior project manager with Jacobs Consultancy in their Denver office. He is a graduate of Georgia Institute of Technology with a BME and has 25 years of experience designing mechanical systems for laboratories, pharmaceutical production, industrial, and other high-technology facilities. He has extensive experience designing central plant systems (steam, chilled water, hot water) lab utilities (RO, DI, compressed air, N2), and HVAC systems. Reach him at Vincent. Sakraida@jacobs.com. Input 39 at www.esmagazine.com/instantproductinfo 48 En g i neer ed Sy stem s March 2009 http://www.maxitrol.com http://www.esmagazine.com/instantproductinfo http://www.deltacooling.com http://www.esmagazine.com/instantproductinfo

Table of Contents Feed for the Digital Edition of Engineered Systems - March 2009

Engineered Systems - March 2009 Contents Editor’s Note Back2Basics Case In Point Commissioning Building Automation HVACR Designer Tips Application Checklist Teaching An Old School New Tricks Basics For Absorption Chillers A New Haven For Sustainable Schools Glossary Classifieds Advertiser Index Tomorrow’s Environment

Engineered Systems - March 2009

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