[Equest-users] SS-E or SS-R for Unmet Hours?

[Chris Jones]

The 90.1 definition of unmet hours is very different from the 
Canadian MNECB/ecoEnergy.  The SS-R report is used to determine 
compliance - no zone may have more than 100 under heated hours.

For a project I am doing, the SS-E times BEPS percentage yields a 
proposed and budget case that meet the requirements of 90.1 Appendix G.

But both models have more than one zone with more than 100 under 
heated hours as reported in the SS-R reports.  As this is not a real 
building, I only have to increase the heating capacity in those few 
zones.  A "real" project would have to re-examine zones that are 
reporting too many under heated hours to determine if the model were 
accurate or if the proposed design required altering.



>
>
>I can confirm Mike's understanding of the DOE-2/eQUEST results.  To 
>get the correct number of hours of unmet loads, people should 
>MULTIPLY the Percent hours outside throttling range from BEPS or 
>BEPU by the total annual "hours fans on" listed in report SS-E.
>
>One other comment re: Ashu's write-up - I believe that (for 
>DOE-2/eQUEST) a zone temperature has to be more than one degree 
>outside the throttling range for that hour to be counted as an hour 
>outside throttling range.  So for a zone with a heating thermostat 
>setpoint of 72 and a 2 degree throttling range (=> 71-73 degree 
>"throttling range"), the zone temperature would have to be LESS THAN 
>70 in order for that hour to be counted.
>          PERCENT OF HOURS ANY SYSTEM ZONE OUTSIDE OF THROTTLING RANGE =  4.45
>          PERCENT OF HOURS ANY PLANT LOAD NOT SATISFIED                =  0.00
>          HOURS ANY ZONE ABOVE COOLING THROTTLING RANGE                =    98
>          HOURS ANY ZONE BELOW HEATING THROTTLING RANGE                =    25


Chris Jones
14 Oneida Avenue
Toronto, ON M5J 2E3.
Tel.  416-203-7465
Fax. 416-946-1005

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