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
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Intelligent, efficient PLC programming: Cost-saving programming languages are available now; Automation system upgrades; Help from the cloud; Improving flow control; System integration tips
Smarter machines require smarter systems; Fixing PID, part 3; Process safety; Hardware and software integration; Legalities: Integrated lean project delivery
Choosing controllers: PLCs, PACs, IPCs, DCS? What's best for your application?; Wireless trends; Design, integration; Manufacturing Day; Product Exclusive
PLCs, robots, and the quest for a single controller; how OEE is key to automation solutions.
This article collection contains several articles on improving the use of PID.
Learn how Industry 4.0 adds supply chain efficiency, optimizes pricing, improves quality, and more.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Special report: U.S. natural gas; LNG transport technologies evolve to meet market demand; Understanding new methane regulations; Predictive maintenance for gas pipeline compressors
Cyber security cost-efficient for industrial control systems; Extracting full value from operational data; Managing cyber security risks
Drilling for Big Data: Managing the flow of information; Big data drilldown series: Challenge and opportunity; OT to IT: Creating a circle of improvement; Industry loses best workers, again