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7 comments

New Hospital to Use Recycled Waste Heat

Posted December 30, 2010 7:00 AM by Sharkles

The University Medical Center of Princeton at Plainsboro being constructed outside of Princeton, New Jersey will not rely on the local electricity gird for power. Instead, it will have its own power plant that uses natural gas to generate electricity. The byproduct heat will create steam that will heat the building, being used to sterilize equipment, and provide cooling.

The power plant is said to be around 70% efficient, allowing the hospital to save hundreds of thousands of dollars each year. When the electrical grid is cheaper, the hospital will switch back-and-forth. Meanwhile, the plant will chill and store water, so that less energy will be required during peak demand periods for the cooling systems.

Do you think recycled heat systems should be implemented in more projects like the University Medical Center?

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Anonymous Poster
#1

Re: New Hospital to Use Recycled Waste Heat

12/30/2010 11:22 PM

yes can be done depending on your local codes and regulations

crm

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Anonymous Poster
#5
In reply to #1

Re: New Hospital to Use Recycled Waste Heat

01/03/2011 3:04 AM

This has absolutely nothing to do with local codes and regulations.

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Power-User

Join Date: Dec 2010
Location: 1144 n meta okc,ok73107
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#2

Re: New Hospital to Use Recycled Waste Heat

12/31/2010 6:16 PM

I have seen some in the past that were forced to have their own power generators

or something that had water rushing down the sides and big grates with loud

noisey water sounds outside and in the back. I was a Lab Courier.ds

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Guru

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#3

Re: New Hospital to Use Recycled Waste Heat

01/01/2011 3:13 AM

Optimum utilization of available resources in an effective way is one of the major responsibilities of an engineer. Recycling or use of waste heat without creating damage to the environment is always a desirable solution by all.

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Guru

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#4

Re: New Hospital to Use Recycled Waste Heat

01/01/2011 3:37 AM

Hospitals generally have to have emergency power anyway, so I'd see this a policy/administration "waking up" to what engineering has been saying for some time.

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Anonymous Poster
#6

Re: New Hospital to Use Recycled Waste Heat

01/03/2011 3:52 AM

Combined cycle cogeneration is nothing new. A combustion turbine (CT) is used to drive the generator and the exhaust is sent to a waste heat recovery boiler that produces either steam or hi temp hot water. When the heating load is high a duct burner is used to add more heat (BTU's) to the exhaust gas stream. The steam or hot water is then used for building or process heat. You can also use this heat for cooling if you have an absorber. You can also sell back (export) power to the grid and of course you have the option of shutting down turbines when it is cheaper to buy power rather than generate your own. If you work with an outfit like PJM http://www.pjm.com/ you can save considerable $$$. The CT also has the ability to run on liquid fuel which could save you even more. In NJ my plant is permitted by the NJDEPE to allow us to run liquid fuel ( ultra low sulfur ) for up 10% of our run time. You need the liquid fuel option especially in the winter because the gas company ( at least in my home state of NJ) may order you to curtail gas usage on the sub zero days because of pipeline delivery issues. You also need a special high pressure gas line connection unless you want to use gas compressors to raise the fuel gas pressure. Gas compressors are typically a headache to run and maintain and are real energy hogs. If you go with one of the newer "recoup" CT designs you can attain efficiencies in the 70% range and higher. I really don't see what all the press is about because I can name several Universities and at least a dozen industrial plants within a 25 mile radius of here that have been doing this for a good 15 years or more ... but then again we are talking about Princeton. Edmund

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Guru

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#7

Re: New Hospital to Use Recycled Waste Heat

04/02/2011 3:05 AM

Most VA Hosptials have been creating their own power for years and running the laundry to from the hot water off the generators.

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