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Generating Heat Pump Coefficients From Manufacturers Data

asked 2015-10-31 05:50:48 -0600

Vmoreno gravatar image


I am trying to create the coefficients of performance of GSHP, using heatpump-watertowater-watertoair-spreadsheets. Excel fails to compute. Somebody can look at the data presented?

Attached the following information:

  • Manufacturer's table



  • Required data input table

I haven´t flow rate data.

Thanks in advance.

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Have you tried using another method besides excel to create the curve coefficients? I used Python to regress VRV coefficients:

Clayton Miller gravatar image Clayton Miller  ( 2016-01-14 20:46:18 -0600 )edit

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answered 2016-01-27 19:01:32 -0600

There are 2 issues here.

The first being the lack of water flow data in heating mode.

  • If you have data for cooling mode, you could use the same values for heating mode.
  • I would review the manufacturers performance data again to be sure heating water flow rates are not mentioned somewhere in the documentation.

The second issue is the use of only a single value for any variable in these tables, in your case the water flow rates.

  • The coefficients for these variables will not regress and will probably wind up as useless if not 0.
  • The system should use these flow rates as constants during the simulation (no variation at all) since the regression does not include any variation in these values.
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Asked: 2015-10-31 05:50:48 -0600

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Last updated: Jan 27 '16