[Equest-users] co-generation(gas-turbine generator) question !

[Bishop, Bill]

Kim,

The gas turbine generator is controlled by the settings in the electric meter to which it is assigned. The generator will match the required electricity consumption (if it has the capacity) if you set the COGEN-TRACK-MODE to "Track Electric Load". Setting the track mode to "Track Thermal Load" will control the generator to meet the hot water demand of the loop to which it is attached, and you only get electricity when the generator is running to meet the HW load. If your heating demand is higher than your electricity demand, the generator will produce more electricity than can be used by the UTILITY meter and the surplus power is lost unless you also attach the generator to an ELECTRIC-SALE meter. Setting the track mode to "Track Electric Load" should increase the fuel-to-electricity efficiency but then you will be wasting some of the recoverable exhaust heat.

[cid:image003.jpg at 01CE6B3A.26C6A1B0]

Regards,
Bill

William Bishop, PE, BEMP, BEAP, LEED AP | Pathfinder Engineers & Architects LLP
Senior Energy Engineer

134 South Fitzhugh Street                 Rochester, NY 14608
T: (585) 325-6004 Ext. 114            F: (585) 325-6005
bbishop at pathfinder-ea.com<mailto:wbishop at pathfinder-ea.com>           www.pathfinder-ea.com<http://www.pathfinder-ea.com/>
P   Sustainability - the forest AND the trees. P

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of DongEun Kim
Sent: Monday, June 17, 2013 5:19 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] co-generation(gas-turbine generator) question !

Hi All!

I have an urgent question for you!

I am trying to model a gas-turbine generator (CHP) plant per the DES guideline Opt2.
The CHP generates electricity using "track thermal load" and provides recovered hot water directly to a hot water loop.

The problem is that  the total electricity generated by the CHP plant is much less than it is supposed to be.
(I put "HIR=2.5" for the gas-turbine generator as the electricity generation efficiency is 40%. However, the output shows that the total electricity generated is only 4% of the total fuel input)

Does anyone  have some thoughts on this?

Any comment will be greatly appreciated!

Thank you!!

Kim

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