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Can I find variable pump with performance curve which can be used for LEED baseline case?

asked 2018-05-31 21:07:59 -0600

katsuya.obara gravatar image

updated 2018-06-01 10:02:48 -0600

I am modelling LEED v4 baseline case for system8.
To model pump in HVAC system, I think I should refer to 6.5.4.1 in ASHRAE 90.1-2010.
Are there any variable pump model with performance curve which comply with requirement already available on the internet?

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answered 2018-06-01 09:49:34 -0600

updated 2018-06-01 10:11:14 -0600

The Create Baseline Building measure will handle this for you, which uses the coefficients below. These come from page 3.221 (251) of the PNNL 90.1-2010 Performance Rating Method Reference Manual (and probably from COMNET and Title24 references too).

case control_type
when 'Constant Flow'
  coeff_a = 0.0
  coeff_b = 1.0
  coeff_c = 0.0
  coeff_d = 0.0
when 'Riding Curve'
  coeff_a = 0.0
  coeff_b = 3.2485
  coeff_c = -4.7443
  coeff_d = 2.5294
when 'VSD No Reset'
  coeff_a = 0.0
  coeff_b = 0.5726
  coeff_c = -0.301
  coeff_d = 0.7347
when 'VSD DP Reset'
  coeff_a = 0.0
  coeff_b = 0.0205
  coeff_c = 0.4101
  coeff_d = 0.5753

Since the project is using the performance path you don't need to follow the prescriptive requirements of subsection 5, just the mandatory requirements of subsection 4.

G1.2 Performance Rating. This performance rating method requires conformance with the following provisions: All requirements of Sections 5.4, 6.4, 7.4, 8.4, 9.4, and 10.4 are met. These sections contain the mandatory provisions of the standard and are prerequisites for this rating method...

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Asked: 2018-05-31 21:07:59 -0600

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Last updated: Jun 01 '18