[BLDG-SIM] DOE2.1e HP HEAT-EIR-FPLR Problems

Chris Jones cj at cr-jay.ca
Wed Apr 4 08:18:51 PDT 2007


It looks like my table is all messed when I arrives.  Hopefully you 
can make sense of it.

At 10:41 2007-04-04, Chris Jones wrote:

>I am comparing the default DOE2.1e HP heating curves to the
>performance data from various manufacturers.  In particular the
>EIR-FPLR curve does not fit what the manufacturers show in their
>data.  The default curve shows the EIR dropping as the part load
>ratio drops.  My assumption is that PLR = Operating Capacity/Design
>Capacity.  With the Trane, McQuay, and Waterfurnace data, the EIR
>increases as the PLR goes down.  I am assuming that part load is a
>result of lower flow through the unit or from higher entering dry bulb
>temperature.  So when I do create my set of heating curves
>HEAT-EIR-FT, HEAT-CAP-FT and HEAT-EIR-FPLR, the performance is
>significantly worse than with the default DOE2.1e curves.
>
>Am I misinterpreting how to plot the data points for the HEAT-EIR-FPLR
>curve?  Example from Trane:
>COP     CAP             EIR     Ent
>DB      Ent
>WT      PLR     EIR/EIR
>Design  GPM     FPLR
>4.2     112000  0.238   68              68              1.000 
>1.000                   24.5    (1.000, 1.000)
>3.1     62675           0.323   70      20      0.560 
>1.355                           12.1    (0.560, 1.355)
>3.1     64639           0.323   70      20      0.577 
>1.355                           18.4    (0.577, 1.355)
>3.2     65641           0.313   70      20      0.586 
>1.313                           24.4    (0.586, 1.313)
>3.3     71123           0.303   70      30      0.635 
>1.273                           12.1    (0.635, 1.273)
>3.4     73541           0.294   70      30      0.657 
>1.235                           18.4    (0.657, 1.235)
>3.4     74631           0.294   70      30      0.666 
>1.235                           24.4    (0.666, 1.235)
>3.5     79943           0.286   70      40      0.714 
>1.200                           12.1    (0.714, 1.200)
>3.6     82643           0.278   70      40      0.738 
>1.167                           18.4    (0.738, 1.167)
>3.6     83991           0.278   70      40      0.750 
>1.167                           24.4    (0.750, 1.167)
>3.7     88881           0.270   70      50      0.794 
>1.135                           12.1    (0.794, 1.135)
>3.8     91903           0.263   70      50      0.821 
>1.105                           18.4    (0.821, 1.105)
>3.9     93457           0.256   70      50      0.834 
>1.077                           24.4    (0.834, 1.077)
>4       98031           0.250   70      60      0.875 
>1.050                           12.1    (0.875, 1.050)
>4       101429  0.250   70      60      0.906           1.050 
>                    18.4    (0.906, 1.050)
>4.1     103173  0.244   70      60      0.921           1.024 
>                    24.4    (0.921, 1.024)
>4.2     107353  0.238   70      70      0.959           1.000 
>                    12.1    (0.959, 1.000)
>4.2     111199  0.238   70      70      0.993           1.000 
>                    18.4    (0.993, 1.000)
>4.3     113135  0.233   70      70      1.010           0.977 
>                    24.4    (1.010, 0.977)
>4.4     116795  0.227   70      80      1.043           0.955 
>                    12.1    (1.043, 0.955)
>4.4     121041  0.227   70      80      1.081           0.955 
>                    18.4    (1.081, 0.955)
>4.5     123169  0.222   70      80      1.100           0.933 
>                    24.4    (1.100, 0.933)
>4.5     126363  0.222   70      90      1.128           0.933 
>                    12.1    (1.128, 0.933)
>4.6     130957  0.217   70      90      1.169           0.913 
>                    18.4    (1.169, 0.913)
>4.7     133313  0.213   70      90      1.190           0.894 
>                    24.4    (1.190, 0.894)
>
>Thanks for any help!
>
>
>
>
>
>
>Chris Jones, P.Eng.
>14 Oneida Avenue
>Toronto, ON M5J2E3
>Tel. 416 203-7465
>Fax. 416 946-1005
>
>
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Chris Jones, P.Eng.
14 Oneida Avenue
Toronto, ON M5J2E3
Tel. 416 203-7465
Fax. 416 946-1005 

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