The Need for Steam

As is the case with many health-care institutions, Kaiser Hospital in Sunnyside, Ore., periodically requires large amounts of steam for heating and sterilization. However, in the past, the difficulty was that one boiler was not sufficient to handle the sudden load swing. "In the wintertime, our two 300-hp fire-tube boilers would not hold the load, so we'd have to run our 500-hp boiler with a 30...

01/01/1970


As is the case with many health-care institutions, Kaiser Hospital in Sunnyside, Ore., periodically requires large amounts of steam for heating and sterilization. However, in the past, the difficulty was that one boiler was not sufficient to handle the sudden load swing.

"In the wintertime, our two 300-hp fire-tube boilers would not hold the load, so we'd have to run our 500-hp boiler with a 300 hp in standby, staying warm. And, in the summertime, we had one 300 hp on-line with the other 300-hp fire-tube in standby," explains Kaiser's Maintenance Manager Wayne Daggett.

Once GVA Northwest, LLC, was brought in as a consultant, the Portland, Ore.-based M/E firm informed the hospital that boiler size was not the problem. The real issue was that it took the standby boiler up to a half an hour to kick into full gear to meet sudden increases in the hospital's steam needs.

The solution was to retrofit with two 200-hp water-tube boilers, that had the ability to produce steam within minutes of being fired up.

With significantly higher efficiencies, the hospital has been able to meet its heat and steam needs with just one 200-hp boiler in the summer. In the winter, the entire load is also covered by a single 200-hp boiler on-line, but backed with the second boiler.

"The boilers run as needed, modulating themselves as the load dictates," says Daggett. "The increase in efficiency is really helping us out."

Looking at the numbers, GVA designer John Hilton confirms, "If you figure that previously, 600 to 800 hp was required for peak demand and now it's just 400, it is not surprising that the hospital estimates they are saving 25% on their fuel bill."





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.
High-performance buildings; Building envelope and integration; Electrical, HVAC system integration; Smoke control systems; Using BAS for M&V
Pressure piping systems: Designing with ASME; Lab ventilation; Lighting controls; Reduce energy use with VFDs
Smoke control: Designing for proper ventilation; Smart Grid Standard 201P; Commissioning HVAC systems; Boilers and boiler systems
Case Study Database

Case Study Database

Get more exposure for your case study by uploading it to the Consulting-Specifying Engineer 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.

Protecting standby generators for mission critical facilities; Selecting energy-efficient transformers; Integrating power monitoring systems; Mitigating harmonics in electrical systems
Commissioning electrical systems in mission critical facilities; Anticipating the Smart Grid; Mitigating arc flash hazards in medium-voltage switchgear; Comparing generator sizing software
Integrating BAS, electrical systems; Electrical system flexibility; Hospital electrical distribution; Electrical system grounding
Cannon Design’s blog is a place for the many voices of the firm to share thoughts and news related to current projects...
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.