[Equest-users] Parametric runs and user expressions

[Julien Marrec]

Ah! I wasn't looking in the right file.

Thanks a lot David!

Best,
Julien


--
Julien Marrec, EBCP, BPI MFBA
Energy&Sustainability Engineer
T: +33 6 95 14 42 13

LinkedIn (en) : www.linkedin.com/in/julienmarrec
LinkedIn (fr) : www.linkedin.com/in/julienmarrec/fr
<http://www.linkedin.com/in/julienmarrec>

2015-02-24 18:06 GMT+01:00 David Reddy <david at 360-analytics.com>:

>  Julien,
> For the main set of DOE-2 commands/keywords, the symbol values are defined
> in the BDLKEY.OUT file that is included in the Data\DOE-2 folder of eQUEST
> installs.
>
> Below is a screen shot of an example.  In many cases, the SV for an
> enumeration is the same as the index # of the list as presented in the eQ
> interface, but there are exceptions.
>
>
>
>
> On 2/24/2015 8:52 AM, Julien Marrec wrote:
>
>    Hi David,
>
>  I know how to change the value of a global keyword in a parametric run.
> When I didn't know is whether I could set one value to be linked to a
> global parameter (such as setting the process flow of my HW loop to
> "{#PA("GPM_DHW")*500*65/
> 1000000}" when I switch from a separate water heater to an indirect DHW
> heater)
>
> But your elegant solution of a user expression with a global "switch"
> solves this, and then more, thanks!
>
>  Though I could just use your switch solution, I'm curious about the
> symbolic value of global parameters, is it just for built-in keyword
> (COLDEST, etc)? Or is there any way I could using a global keyword to point
> to a given construction?
>
>  FInally, if someone could tell me if there's a surefire way to know what
> symbolicValue (#SV) will return I'd appreciate it? Is it just the order of
> the associated dropdown list, 0-ordered?
>
>  Thanks,
>  Julien
>
>
>   --
> Julien Marrec, EBCP, BPI MFBA
> Energy&Sustainability Engineer
> T: +33 6 95 14 42 13
>
> LinkedIn (en) : www.linkedin.com/in/julienmarrec
> LinkedIn (fr) : www.linkedin.com/in/julienmarrec/fr
>
> 2015-02-24 17:15 GMT+01:00 David Reddy <david at 360-analytics.com>:
>
>>  Hi Julien,
>>
>> I am pretty sure you can't use an expression to set a global parameter;
>> they are limited to being numeric or string (symbol) values.
>>
>> Unless I am mistaken on what you are after, you can change the values of
>> global parameters in parametric runs; see below for an example.
>>
>>
>>
>> To my knowledge, no, you can't reset or restore defaults using parametric
>> runs, but I can't say I've ever investigated this.  You can use expressions
>> that are dependent on a global parameters to set a keyword value to unused
>> or no_default. For example:
>>
>> {if(#pa("901 HVAC Flag") ==1)
>> then 45
>> else unused
>> endif}
>>
>> -David
>>
>>
>>
>> On 2/24/2015 6:48 AM, Julien Marrec wrote:
>>
>>     Hi,
>>
>>  Is there a way to implement the following::
>>
>>  - Use a user expression to set a global parameter's value?
>>  ex: define a parameter which refers to another one:
>> {#PA("GPM_DHW")*500*65/1000000}
>>
>> - Use a user expression in a parametric run component?
>> Ex: I would like to set one keyword to refer to a global parameter
>>
>>
>>  - In parametric runs, reset values to be default values? Or at least
>> specify the "unused" keyword?
>>
>>  Thanks,
>>  Julien
>>
>>  Side note: this is pretty weird, but if you have a UVT with HEAT SOURCE
>> being electricity, it stills include some furnace losses, exactly 800 BTU/H
>> (on your fuel meter) which is the DOE default.
>> I found this because I've got one example where I have a UVT which Heat
>> source is a furnace in my baseline, and it's actually electric in my
>> proposed model.
>> In my baseline, I have defined a user default for the FURNACE-AUX to be 0
>> BTU/H (no pilot light consumption). This 0 BTU/H value stays once I change
>> heat source to electricity, and gives me a lower gas consumption that I
>> would get if I manually restore FURNACE-AUX to be DOE default (which
>> displays "n/a")).
>>
>>
>>
>>
>>     --
>> Julien Marrec, EBCP, BPI MFBA
>> Energy&Sustainability Engineer
>> T: +33 6 95 14 42 13 <%2B33%206%2095%2014%2042%2013>
>>
>> LinkedIn (en) : www.linkedin.com/in/julienmarrec
>> LinkedIn (fr) : www.linkedin.com/in/julienmarrec/fr
>>
>>
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>
>
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