[Bldg-sim] Setback Temperature

[leen peeters]

Hi Anderson,

a few years ago I did some research on thermal comfort and deadbands. In my
PhD, first chapter you can find that. It is also published in Applied
Energy, but the chapter is more elaborate.


http://hdl.handle.net/1979/2651


Leen Peeters


On Tue, Dec 3, 2013 at 12:35 AM, Nick Caton <ncaton at smithboucher.com> wrote:

>  Two things:
>
>
>
> 1.       For the affected climate zones, the wording of the cited section
> requires controls that allow for setback temperatures in a *range* large
> enough to include those temperatures… not those temperatures specifically.
> To paraphrase, the controls must allow for a heating setback temperature
> setpoint anywhere between the occupied heating setpoint and down to 55F (or
> lower).  Likewise there must be a cooling setback range to include anything
> between the occupied cooling setpoint and up to 90F (or higher).  The
> prescriptive requirement is for a minimum range of control, not to define
> what those setback temperatures actually are.
>
> 2.       I agree with Scott: 90.1 does not prescriptively mandate
> temperature setpoints (for setback or occupied hours).  If you are doing an
> Appendix G based model, it does require baseline and proposed models to
> have matching inputs in this regard, however.
>
>
>
> So in sum, I’d concur both your design (occupied) and setback temperatures
> should be determined in accordance with your mechanical design load
> calculations, which in turn should consider and be informed by
> owner/climate/industry-specific space conditioning requirements with
> respect to occupied and unoccupied states.
>
>
>
> Regards,
>
>
>
> ~Nick
>
>
>
> [image: cid:489575314 at 22072009-0ABB]
>
>
>
> *NICK CATON, P.E.*
>
> SENIOR ENGINEER
>
>
>
> Smith & Boucher Engineers
>
> 25501 west valley parkway, suite 200
>
> olathe, ks 66061
>
> direct 913.344.0036
>
> fax 913.345.0617
>
> www.smithboucher.com
>
>
>
> *From:* bldg-sim-bounces at lists.onebuilding.org [mailto:
> bldg-sim-bounces at lists.onebuilding.org] *On Behalf Of *West, Scott P
> *Sent:* Monday, December 02, 2013 5:09 PM
> *To:* 'Anderson Letti'; 'bldg-sim at lists.onebuilding.org'
> *Subject:* Re: [Bldg-sim] Setback Temperature
>
>
>
> Anderson,
>
> I was checking this out recently I don’t believe temperature or humidity
> setpoints are regulated by ASHRAE 90.1 during occupied periods.  I think
> they primarily limit this through ASHRAE 55 regarding thermal comfort.  Of
> course ASHRAE standard 55 is often not mandatory but it is certainly good
> practice.  It goes without saying that several space types such as
> hospitals and labs have special temperature and humidity requirements that
> are industry-specific.
>
>
>
> Scott P. West, P.E., LEED AP BD+C, BEAP, BEMP | *JACOBS* | Mechanical
> Engineer | Energy & Power Solutions | 817.222.8512 office | 817.897.1882cell
> | scott.west at jacobs.com <rick.zilar at jacobs.com> | www.jacobs.com |
> www.jacobs.com/energyportfolio
>
>
>
> *From:* Anderson Letti [mailto:anderson.a.letti at gmail.com<anderson.a.letti at gmail.com>]
>
> *Sent:* Thursday, November 28, 2013 2:36 PM
> *To:* bldg-sim at lists.onebuilding.org
> *Subject:* [Bldg-sim] Setback Temperature
>
>
>
> Dear all,
>
>
>
> We are working on a project that has a special occupancy space and we need
> to determine a setback/setup temperature for moments that the space is not
> occupied during working hours.
>
>
>
> Section 6.4.3.3.2, of ASHRAE 90.1, states that setback temperature must be
> 13ºC or lower, and setup temperature, 32ºC or higher. I understand these
> temperatures are for off-hours.
>
>
>
> Are there such limits of setback/setup temperature for working hours? Or
> is it defined by design?
>
>
>
> Regards,
>
> Anderson Letti
>
>
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