[Bldg-sim] Setpoint Temperature

[Vinay Devanathan]

Thanks, Bill. That was exactly what I wanted to know.

Regards,
Vinay

On Fri, Jul 16, 2010 at 3:08 PM, Bishop, Bill <wbishop at pathfinder-ea.com>wrote:

>  Vinay,
>
>
>
> If I understand you correctly, you want to know what the temperature
> difference is allowed to be between the actual space temperature and the
> setpoint temperature to define what an “unmet hour” is. In eQUEST, for
> example, this parameter is called the “throttling range”, with a default
> value of 2°F for a proportional-type thermostat. Prior posts have suggested
> increasing the throttling range as a method of reducing unmet hours. I think
> this should be done as a last resort, but if you do it, you need to keep the
> same throttling range for both baseline and proposed for Appendix G. Unless
> the HVAC design is poor, the building has unusual load characteristics, or
> you are trying to model something outside of the capabilities of the
> simulation program, high unmet hours are often the result of “problems” in
> the model – mistakes in simulating the zones, systems, loads etc.
>
>
>
> Regards,
>
> Bill
>
>
>
> *William** Bishop, PE**, BEMP, LEED® AP **|** **Pathfinder Engineers &
> Architects LLP***
>
> Mechanical Engineer
>
>
>
> 134 South Fitzhugh Street
> Rochester, NY 14608
> T: (585) 325-6004 Ext. 114
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>
> wbishop at pathfinder-ea.com
>
> www.pathfinder-ea.com
>
> P Sustainability – less is more.
>   ------------------------------
>
> *From:* bldg-sim-bounces at lists.onebuilding.org [mailto:
> bldg-sim-bounces at lists.onebuilding.org] *On Behalf Of *Vinay Devanathan
> *Sent:* Friday, July 16, 2010 2:23 PM
> *To:* bldg-sim at lists.onebuilding.org
> *Subject:* [Bldg-sim] Setpoint Temperature
>
>
>
> Hello All,
>
> Appendix G guideline says 300 hours of setpoints not met is acceptable. Is
> there any Tolerance for heating/cooling setpoints not met? Or the
> temperatures have to be exact?
>
> Thank you.
>
> Regards,
> Vinay
>
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