[Equest-users] Steam Meter Energy Usage Much Less Than Gas Boiler Energy Usage

[Kathryn Kerns]

Everyone, I have a building in Fairbanks Alaska that uses hot water
heat. I built an energy model for it and included a gas, natural draft,
80% efficient boiler to heat the hot water. I then deleted the gas hot
water boiler and substituted a steam meter. I repeated this process for
the gas DHW heater. When I ran the steam heat meter energy model, I
noticed that the Heating Energy Consumption was reduced by 38% compared
to the gas energy model. Nothing else seemed to change much, but the
reduction of heating energy bothers me. I realize that a steam to hot
water heat exchanger is more efficient than a boiler, but why does the
amount of heating energy required drop so much? Shouldn't the amount of
heat required be the same for both models?  I have attached the Energy
Consumption reports for both models. Thanks.

 

 

Kathryn Kerns

Systems Specialist

BCE Engineers, Inc.

| Ph: 253.922.0446 | Fx: 253.922.0896 | 

 

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20100428/d0d9cd77/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Steam and Gas Energy Model Reports.pdf
Type: application/octet-stream
Size: 504133 bytes
Desc: Steam and Gas Energy Model Reports.pdf
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20100428/d0d9cd77/attachment.obj>