[bldg-sim] CHP energy cost summary

[Baker, Kristopher]

Peter,

 

The ES-F report summarizes just the blocks and ratchet components of the
utility rate structure.  If they aren't matching, then you have some
non-block costs included in the definition of the utility structure.

 

For example, 

 

"XXX" = UTILITY-RATE    

   TYPE             = ELECTRICITY

   MONTH-CHGS       = ( 110 )

   ENERGY-CHG       = 0.01836

   DEMAND-CHGS      = ( 3.84 )

   BLOCK-CHARGES    = ( "On Peak Summer", "Intermediate Summer", 

         "Off Peak Summer", "On Peak Winter", "Intermediate Winter", 

         "Off Peak Winter", "Demand Gen Summer", "Demand Gen Winter" )

   DEMAND-INTERVAL  = 30

  

With monthly energy usage of 22,476 kWh and 81.2 kW, the total energy
costs are $1750, but the ES-F reports $915.  This is due the $110
monthly charge, the additional $0.01836/kwh fixed consumption charge
($413 = 0.01836 * 22476), and the additional 3.84/kW fixed demand charge
($312 = 3.84 * 81.2). Thus, the ES-E total of $1750 = 110 + 413 + 312 +
915 

 

Hope this makes sense.

 

KB

Kristopher S. Baker
Sustainability Specialist
LEED(r) Accredited Professional

Syska Hennessy Group, Inc.

 

 

11350 Random Hills Road,
Suite 750
Fairfax, VA 22030
Tel: 703.383.9383
Email:kbaker at syska.com <mailto:dcallan at syska.com>  
http://www.syska.com <http://www.syska.com/>  

 

 

________________________________

From: postman at gard.com [mailto:postman at gard.com] On Behalf Of Peter
Simmonds
Sent: Monday, January 17, 2005 3:18 PM
To: bldg-sim at gard.com
Subject: [bldg-sim] CHP energy cost summary

 

Does anyone have any experience with utility rate applications for
electricity? We are simulating the cost comparison of building having a
traditional chilled water plant and boilers against a plant having three
cogeneration units providing heat for an absorption chiller. The results
shown in report ES-E do not match report ES-F. The total charges should
be the same or am I missing something?

 

Peter Simmonds Ph.D.

Associate
IBE Consulting Engineers

14130 Riverside Drive Suite 201

Sherman Oaks, CA 91423
p:   (818) 377-8220
f:    (818) 377-8230
m:  (818) 219-1284
IDEAS FOR THE BUILT ENVIRONMENT <BLOCKED::http://www.ibece.com/> 

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