hvac models for solar decathlon

[jfrech]

Aaron,

We have started to integrate the matlab code you wrote for the HVAC
models into the automation software for the house. I just wanted to get
clarification on a few items before the models were truly baked in. It
would be easiest if we can just sit down and take a look over things;
let me know if you're available Thursday (anytime after 2) or Friday
(after 3:30). I apologize for the limited times, my schedule is a bit
crazy these days.

Thanks,
Justin Frech

[Aaron Perelman]

I could meet Friday at 3:30. Could you give me a quick summary of what you might want to talk about, so I could prepare anything needed?

Thanks,
Aaron

[jfrech]

Aaron,

Since we will be generalizing a lot of this code to fit different time
frames and be used as a basis for smart/predictive choices I just want
to go over the models for this particular application. Specifically the
heat loss/gain of the house due to the HVAC system (I know this is
majority of the code). Really I want to show you what we have and make
sure the models are implemented correctly.

Friday @ 3:30 sounds good. We can meet in the library or anywhere if
you have somewhere better in mind.

Thanks,
Justin Frech

On Tue, 19 Feb 2013 20:41:12 -0500, Aaron Perelman wrote:
> I could meet Friday at 3:30. Could you give me a quick summary of
> what
> you might want to talk about, so I could prepare anything needed?
>
> Thanks,
> Aaron

> On Feb 19, 2013 8:22 PM, "jfrech" wrote:
>
>> Aaron,
>>
>> We have started to integrate the matlab code you wrote for the HVAC
>> models into the automation software for the house.  I just wanted
>> to get clarification on a few items before the models were truly
>> baked in.  It would be easiest if we can just sit down and take a
>> look over things; let me know if you're available Thursday (anytime
>> after 2) or Friday (after 3:30).  I apologize for the limited
>> times, my schedule is a bit crazy these days.
>>
>> Thanks,
>> Justin Frech
>
>

> Links:
> ------
> [1] mailto:jfr...@stevens.edu

[Aaron Perelman]

Did we decide where we are meeting?

[Laura Cerrito]

---------- Forwarded message ----------
From: Aaron Perelman <perel...@gmail.com>
Date: Tue, Apr 2, 2013 at 8:03 AM
Subject: Re: solar dec - solar model
To: jfrech <jfr...@stevens.edu>
Cc: jobbe...@gmail.com

The HVAC_Plumbing model should be good. The bristow_campbel model is for cloud coverage. Almost everything is there but there is a constant that needs to be solved. Still working on it.

On Fri, Mar 29, 2013 at 6:58 AM, jfrech <jfr...@stevens.edu> wrote:

Aaron will it be possible for us to get these models by next week?  We have our own deadline coming up of having this (and other things) implemented.  Please let me know as soon as you can.

Thanks,
Justin Frech

On Tue, 19 Mar 2013 14:40:15 -0400, jfrech wrote:

Is there anything you need from me or I can push to have Mark get?
Also do you have any ETA on when you could have a model produced?  I
only ask because we are being pushed to have the model implemented on
our end.

Thanks again,
Justin Frech

On Tue, 19 Mar 2013 14:27:37 -0400, Aaron Perelman wrote:

I'm attempting a different approach. I'm attempting to recreate
the Bristow-Campbell Model. I can't find the data that is needed for
the simulations that we talked about.

On Mon, Mar 18, 2013 at 9:26 PM, jfrech  wrote:

Hey Aaron,

Just wanted to touch base and see if there has been any headway on
the pv models and if you need anything from my end.

Thanks,
Justin Frech

On Wed, 6 Mar 2013 11:07:29 -0500, Aaron Perelman wrote:

hey,

I am still looking for the data necessary for the solar
simulations. I
do have an update on the HVAC model in the MATLAB code. When
integrating the plumbing and HVAC I found an issue which I fixed
in
the attached document. The generally logic of the code remains
the
same but there are multiple lines that I edited. 

I am still in the process of combining the two programs.

Thanks,
Aaron

 On Thu, Feb 28, 2013 at 6:31 PM, jfrech  wrote:

Aaron,

Here is some info we got from Mark on the solar shingles and
how
some of the data was being generated.  Hopefully this makes
more
sense to you than me.  If you can somehow make a model of this
it'd
be greatly appreciated.  Let me know if it seems I missed
something
(but I think I got everything).

Thanks!

I was just talking with Mark and he told me that the ECE team
is
using
http://rredc.nrel.gov/solar/calculators/pvwatts/version1/ [1]
[1]
or version 2:
http://gisatnrel.nrel.gov/PVWatts_Viewer/index.html [2] [2]

They are apparently manually querying these sites and entering
the
results in the excel file.

In our case, the parameters of the array are:
Array tilt 10 degrees  -- it used to be 9 degrees but it will
change soon.
Array Azimuth 180 (south)

We should be able to get the specs of the solar shingles from
the
manual I sent to Laura or the ECE team.

Unfortunately, this only provides average results per month and
we
need more than that. It's based on the following paper. Let's
coordinate with the ECEs to get a more detailed model with best
and
worse case outputs at the very least.

PVWatts performs and an hour-by-hour calculation with
corrections
for things such as the PV module temperature's impact on PV
efficiency, reflection losses, and inverter efficiency as a
function
of load, in addition to the derate factors, so it's not just
multiplying the monthly solar radiation by one factor.
Consequently,
PVWatts results won't necessarily compare very well with
results of
simpler methods.
For more information regarding the algorithms employed by
PVWatts
please see

        David F. Mennicucci, "Photovoltaic Array Simulation
Models", Solar
        Cells, 18(1986) pp. 383-392.

All of the solar panel information can be found in this paper:
http://bld-specialists.com/documents/PVFORM_sol_cells_sm.pdf
[3] [3]

Links:
------
[1] http://rredc.nrel.gov/solar/calculators/pvwatts/version1/ [4]
[2] http://gisatnrel.nrel.gov/PVWatts_Viewer/index.html [5]
[3] http://bld-specialists.com/documents/PVFORM_sol_cells_sm.pdf
[6]
[4] mailto:jfr...@stevens.edu [7]

Links:
------
[1] http://rredc.nrel.gov/solar/calculators/pvwatts/version1/
[2] http://gisatnrel.nrel.gov/PVWatts_Viewer/index.html
[3] http://bld-specialists.com/documents/PVFORM_sol_cells_sm.pdf
[4] http://rredc.nrel.gov/solar/calculators/pvwatts/version1/
[5] http://gisatnrel.nrel.gov/PVWatts_Viewer/index.html
[6] http://bld-specialists.com/documents/PVFORM_sol_cells_sm.pdf
[7] mailto:jfr...@stevens.edu
[8] mailto:jfr...@stevens.edu