[TRNSYS-users] Energy balance per zone_NTYPE 904

王洋 wanghongyang1767 at gmail.com
Thu Apr 10 07:17:40 PDT 2014
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Dear all,

Good Day!

I have some questions for Energy balance per zone_NTYPE 904:

1) I checked the TRNSYS 16_Volume 6 (Documentation) for Energy balance per
zone_NTYPE 904. Its equation is
Zonenr Rel_BAL  BAL_ENERGY= -DQAIRdt +QHEAT     -QCOOL  +QINF
+QVENT       +QCOUPL     +QTRANS  +QGAININT  +QWGAIN    +QSOLGAIN

But, I checked the Summary file for output, the equation becomes
Zonenr Rel_BAL  BAL_ENERGY= -DQAIRdt +QHEAT     -QCOOL  +QINF
+QVENT       +QCOUPL     -QTRANS  +QGAININT  +QWGAIN    +QSOLGAIN

In addition, the Energy_Zone file for output shows
Zonenr Rel_BAL  BAL_ENERGY= -DQAIRdt +QHEAT     -QCOOL  +QINF
+QVENT       +QCOUPL     +QTRANS  +QGAININT  +QWGAIN    +QSOLGAIN

Therefore, I am confused by the aforementioned equation-defination for
Energy balance per zone_NTYPE 904.

2) For the TRNSYS 16_Volume 6 (Documentation) for Energy balance per
zone_NTYPE 904, QTRANS's defination is Transmission into the wall from
inner surface node (might be stored in the wall, going to a slab cooling or
directly thansmitted). Therefore, e.g. in winter indoor temperature is
higher than outdoor, QTRANS should be positive value (+), but, the file of
Energy_Zone shows QTRANS all over the year is Negative (-), although indoor
temperature is higher than outdoor in winter.
Thus, I think the equation should be Zonenr Rel_BAL  BAL_ENERGY= -DQAIRdt
+QHEAT     -QCOOL  +QINF     +QVENT       +QCOUPL     -IQTRANSI +QGAININT
+QWGAIN    +QSOLGAIN

3) I calculated energy demand Qheat, Qcool, Qinfiltration, Qvent, Qintgain
and Qsolar using Matlab (sum of 8760 hours' each values; sim. time step is
0.1h) based on the Energy_Zone (NTYPE 904) file for output. But the
calculated resultes are completely different from the results of
T56_std-Output file. Only Qinfiltration is the same almost between each
other. Please see the following (Unit is kWh):

                                           Qheat    Qcool  Qinfiltration
Qvent QintGain Qsolar
Energy_Zone (NTYPE 904)file   985.94    19.83   107.25  2109.61   2946
2553

T56_std-Output file                     295.4     22.68    107.2   1920
2494       1933

Could you expain this problem?
I guess that it is casued by the peak load of heating, ventilation for
Qheat and Qvent. If so, how to solve this problem?

But for QintGain, Qsolar and Qcool, How to expain the above problems?



Many thanks in advance!

Br.

yang wang













2014-04-10 14:02 GMT+02:00 <trnsys-users-request at cae.wisc.edu>:

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> Today's Topics:
>
>    1. PROBLEMS IN CALCULATING THE COOLING LOAD (Bachchulal Gupta)
>    2. the code of type557 with vision 17 (=?gb18030?B?tvq25A==?=)
>    3. fuel cell, electrolyzer, H2 tank problem (mohammad sadigh behzadi)
>    4. Two boreholes and one heat pump installation
>       (Matthieu Saint-Ellier (215419))
>    5. ESP-r/TRNSYS co-simulator workshop @ eSim 2014 - Ottawa,
>       Canada - Canada's building simulation conference - May 7-10
>       (Liam O'Brien)
>
>
> ---------- 已转发邮件 ----------
> From: Bachchulal Gupta <blgbharatpur at gmail.com>
> To: "TRNSYS users mailing list at the Solar Energy Lab, UW-Madison" <
> trnsys-users at cae.wisc.edu>
> Cc:
> Date: Thu, 10 Apr 2014 11:50:18 +0530
> Subject: [TRNSYS-users] PROBLEMS IN CALCULATING THE COOLING LOAD
> DEAR ALL
> I am calculating the cooling load of a 5 zone building model make in Tran
> Build
> schedule is given for cooling Monday-Friday 9-18 hrs , but it is
> calculating the
> cooling load for weekend also .
> how this can rectify
>
> regards
> B.L.Gupta
>
>
> ---------- 已转发邮件 ----------
> From: "耳朵" <ly8265754 at qq.com>
> To: "trnsys-users" <trnsys-users at cae.wisc.edu>
> Cc:
> Date: Thu, 10 Apr 2014 14:59:28 +0800
> Subject: [TRNSYS-users] the code of type557 with vision 17
> hello all
> I have a question need your help，I use the 17 version of TRNSYS，but the
> code of Type557 in TESS is vision 16 ,how should get the code of vision 17？
> kind regards
> you lu
>
>
> ---------- 已转发邮件 ----------
> From: mohammad sadigh behzadi <nirooafza at live.com>
> To: "trnsys-users at cae.wisc.edu" <trnsys-users at cae.wisc.edu>
> Cc:
> Date: Thu, 10 Apr 2014 13:28:22 +0430
> Subject: [TRNSYS-users] fuel cell, electrolyzer, H2 tank problem
> hi everyone
> i was going to implement a controller for controlling a hybrid pv/fc
> system but unfortunately when i try to write it's program i face with a
> mechanical issue.
> i have a 400w elevtrolyzer with outlet H2 flow rate of 0.006 m^3/hr and
> its output pipe Cross section (cm^2) is unknown and it;s operating H2
> presure is 10 bar
> a 2kw fuel cell with inlet H2 flow rate of 3.4 m^3/hr that it's input pipe
> cross section area (cm^2) is unknow either and it;s operating H2 presure is
> 10bar
> and a 10kg H2 tank that holds H2 till 10 bar pressure
> should i directly link : 1-outlet flow rate of electrolyzer to inlet H2
> input of H2 tank         ???
>                                     2-inlet flow rate of fuel cell to
> outlet H2 input of H2 tank
>
> that's my question
>
> sincerely yours
>  mohammad behzadi
>
>
> ---------- 已转发邮件 ----------
> From: "Matthieu Saint-Ellier (215419)" <215419 at VIA.DK>
> To: "trnsys-users at cae.wisc.edu" <trnsys-users at cae.wisc.edu>
> Cc: "Carsten Nielsen \(CARN\)" <CARN at VIA.DK>, "Daniele Groppi \(215407\)"
> <215407 at VIA.DK>, "Gonzalo Fuentes Isasi \(215459\)" <215459 at VIA.DK>
> Date: Wed, 9 Apr 2014 14:08:41 +0000
> Subject: [TRNSYS-users] Two boreholes and one heat pump installation
>   Dear TRNSYS users and support team,
>
> I am dealing with a project containing a water-water heat pump and two
> U-tubes boreholes (Vertical ground heat exchangers).
>
> The objective of this project is to extract energy from one of the
> borehole and try to store it in the other one thanks to the heat pump in
> order to use this energy in cold season for instance.
>
> I would like to simulate this installation in an easy way on TRNSYS
> software.
>
> In the first place, my problem is that on TRNSYS you can only have one
> borehole (Vertical ground heat exchanger) per project. However, in my model
> I would need two of these.
> Therefore, I would like to know if there is any way to solve this problem
> or otherwise, which components of the TRNSYS library could be used to
> simulate the storage of energy in a borehole.
>
> In the second place, the refrigerant of the heat pump I use is the 407C.
> But is seems that the attached file *WWHP_Heating-Normalized.dat* located
> in *.\Tess Models\SampleCatalogData\Water-to-WaterHeatPump\Normalized*only contains datas about the R134a refrigerant. I woud like to know how we
> can deal with other refrigerant.
>
> Thank you very much.
>
> Regards.
>
>
>
>
> *-- Matthieu SAINT-ELLIER*
> 00 33 6 37 97 00 91
> VIA University College
> Horsens
> Denmark
>
>
>
> ---------- 已转发邮件 ----------
> From: "Liam O'Brien" <Liam.OBrien at carleton.ca>
> To: <esp-r at lists.strath.ac.uk>, <trnsys-users at engr.wisc.edu>
> Cc:
> Date: Wed, 9 Apr 2014 19:32:58 -0400
> Subject: [TRNSYS-users] ESP-r/TRNSYS co-simulator workshop @ eSim 2014 -
> Ottawa, Canada - Canada's building simulation conference - May 7-10
>   [image: logo] <http://esim.ca/>
>
> Dear ESP-r and TRNSYS users:
>
> Please note that a full-day workshop on ESP-r/TRNSYS co-simulation is
> being hosted as part of the eSim conference on May 7 in Ottawa. The
> instructors are Profs. Ian Beausoleil-Morrison and Michael Kummert and it's
> aimed at researchers and other advanced users. Please see eSim.ca<http://esim.ca>for all details and registration.
>
> I look forward to seeing you on May 7-10 at eSim 2014 in Ottawa!
>  Liam O'Brien
> eSim 2014 Chair
>
> --
> William (Liam) O'Brien, PhD
> Assistant Professor, Architectural Conservation and Sustainability Engineering
> Carleton University
> Canal Building, 5208(613) 520-2600 ext. 8037http://humanbuildinginteractionlab.wordpress.com/
> eSim 2014:Canada's Building Simulation Conference (eSim.ca)
>
>
>
>
>
>
>
>
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